/* Bloque 1: Hero / Introducción - Estudiantes */
.students-hero-wrapper {
    width: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

/* Contenedor principal del hero */
.students-hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(3rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3rem);
    position: relative;
    overflow: hidden;
}

/* Halo de luz suave de fondo */
.students-hero::before {
    content: "";
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(circle at 10% 0%, rgba(59, 130, 246, 0.12), transparent 60%),
        radial-gradient(circle at 90% 80%, rgba(94, 234, 212, 0.12), transparent 60%),
        radial-gradient(circle at 50% 100%, rgba(129, 140, 248, 0.10), transparent 55%);
    opacity: 0.8;
    pointer-events: none;
    z-index: 0;
}

.students-hero-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(2rem, 4vw, 3.5rem);
    flex-wrap: wrap;
}

/* Columna de texto */
.students-hero-text {
    flex: 1 1 300px;
    max-width: 650px;
}

.students-hero-kicker {
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.65);
    margin: 0 0 0.75rem;
}

.students-hero-title {
    font-size: clamp(2rem, 3vw, 2.6rem);
    line-height: 1.2;
    margin: 0 0 1.25rem;
    color: #0f172a;
    font-weight: 700;
}

.students-hero-subtitle {
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 1.75rem;
    color: rgba(15, 23, 42, 0.8);
}

/* "Acciones" como etiquetas informativas (no clicables) */
.students-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-action-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.55rem 1rem;
    border-radius: 999px;
    font-size: 0.85rem;
    white-space: nowrap;
    border: 1px solid rgba(59, 130, 246, 0.25);
    background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.98));
    box-shadow:
        0 0 0 1px rgba(148, 163, 184, 0.08),
        0 18px 35px rgba(15, 23, 42, 0.06);
    color: #0f172a;
    letter-spacing: 0.02em;
    pointer-events: none; /* Asegura que no se usen como botón */
}

/* Columna visual futurista */
.students-hero-visual {
    flex: 0 1 280px;
    min-width: 260px;
    max-width: 360px;
    aspect-ratio: 3 / 4;
    position: relative;
    border-radius: 24px;
    background:
        radial-gradient(circle at 20% 0%, rgba(56, 189, 248, 0.18), transparent 55%),
        radial-gradient(circle at 80% 100%, rgba(129, 140, 248, 0.2), transparent 55%),
        linear-gradient(145deg, #0f172a, #020617);
    box-shadow:
        0 25px 45px rgba(15, 23, 42, 0.45),
        0 0 0 1px rgba(148, 163, 184, 0.25);
    overflow: hidden;
}

/* Capas de órbitas simulando sistema académico */
.hero-orbit-layer {
    position: absolute;
    border-radius: 999px;
    border: 1px solid rgba(226, 232, 240, 0.4);
    box-shadow: 0 0 18px rgba(148, 163, 184, 0.4);
    opacity: 0.85;
    animation: heroFloat 18s linear infinite;
}

.hero-orbit-outer {
    inset: 14%;
    animation-duration: 26s;
}

.hero-orbit-middle {
    inset: 26%;
    animation-duration: 20s;
    opacity: 0.7;
}

.hero-orbit-inner {
    inset: 38%;
    animation-duration: 14s;
    opacity: 0.55;
}

/* Tarjeta principal de métrica */
.hero-metric-card {
    position: absolute;
    left: 10%;
    bottom: 14%;
    padding: 0.9rem 1.1rem;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.78);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(148, 163, 184, 0.6);
    box-shadow:
        0 18px 34px rgba(15, 23, 42, 0.55),
        0 0 0 1px rgba(15, 23, 42, 0.8);
    color: #e5e7eb;
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.hero-metric-card span {
    font-size: 1.05rem;
    font-weight: 600;
    color: #a5b4fc;
}

/* Chip flotante secundario */
.hero-metric-chip {
    position: absolute;
    right: 8%;
    top: 14%;
    padding: 0.55rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    background: rgba(15, 23, 42, 0.86);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(129, 140, 248, 0.7);
    color: #e5e7eb;
    box-shadow:
        0 12px 24px rgba(15, 23, 42, 0.5),
        0 0 0 1px rgba(15, 23, 42, 0.8);
}

/* Animación sutil flotante */
@keyframes heroFloat {
    0% {
        transform: rotate(0deg) translate3d(0, 0, 0);
    }
    50% {
        transform: rotate(180deg) translate3d(0, -2px, 0);
    }
    100% {
        transform: rotate(360deg) translate3d(0, 0, 0);
    }
}

/* Responsive */
@media (max-width: 900px) {
    .students-hero-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .students-hero-visual {
        align-self: center;
        order: -1;
        width: 100%;
        max-width: 320px;
    }

    .students-hero-title {
        font-size: clamp(1.8rem, 6vw, 2.3rem);
    }

    .students-hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-action-tag {
        white-space: normal;
    }
}

@media (max-width: 600px) {
    .students-hero {
        padding-inline: 1.25rem;
    }

    .students-hero-kicker {
        font-size: 0.8rem;
    }

    .students-hero-actions {
        gap: 0.6rem;
    }

    .hero-metric-card {
        left: 8%;
        bottom: 12%;
        max-width: 60%;
    }

    .hero-metric-chip {
        right: 6%;
        top: 12%;
        max-width: 70%;
        text-align: right;
    }
}
/* Bloque 2: Problema real del estudiante */
.students-problems {
    width: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.students-problems-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.75rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
}

/* Cabecera del bloque */
.students-problems-header {
    max-width: 720px;
    margin-bottom: clamp(2rem, 3vw, 2.5rem);
}

.problems-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.problems-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.6rem, 2.3vw, 2rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.problems-subtitle {
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.8);
}

/* Grid de problemas */
.students-problems-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-bottom: clamp(2.2rem, 4vw, 3rem);
    position: relative;
}

/* Línea sutil de fondo que une las tarjetas (sensación de sistema) */
.students-problems-grid::before {
    content: "";
    position: absolute;
    inset: 0;
    margin: auto;
    height: 1px;
    width: 100%;
    max-width: 1040px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(148, 163, 184, 0.4),
        transparent
    );
    opacity: 0.4;
    pointer-events: none;
}

/* Tarjetas de problema */
.problem-card {
    position: relative;
    padding: 1.25rem 1.15rem 1.35rem;
    border-radius: 18px;
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.04), transparent 60%),
        linear-gradient(135deg, #f9fafb, #ffffff);
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow:
        0 14px 30px rgba(15, 23, 42, 0.04),
        0 0 0 1px rgba(148, 163, 184, 0.05);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow: hidden;
}

/* Detalle de borde lateral luminoso */
.problem-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border-left: 3px solid transparent;
    background-image: linear-gradient(
            to bottom,
            rgba(59, 130, 246, 0.0),
            rgba(59, 130, 246, 0.5),
            rgba(45, 212, 191, 0.0)
        );
    background-clip: padding-box;
    opacity: 0.7;
    pointer-events: none;
}

/* Índice numérico */
.problem-index {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.55);
    margin-bottom: 0.1rem;
}

/* Título del problema */
.problem-heading {
    font-size: 0.98rem;
    margin: 0;
    color: #0f172a;
    font-weight: 600;
}

/* Descripción del problema */
.problem-text {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
    color: rgba(15, 23, 42, 0.8);
}

/* Conclusión del bloque */
.students-problems-conclusion {
    position: relative;
    padding: 1.6rem 1.4rem;
    border-radius: 20px;
    background:
        radial-gradient(circle at 0% 0%, rgba(59, 130, 246, 0.14), transparent 55%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.10), transparent 60%),
        #020617;
    color: #e5e7eb;
    overflow: hidden;
}

/* Línea decorativa en la conclusión */
.students-problems-conclusion::before {
    content: "";
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(circle at 20% 0%, rgba(129, 140, 248, 0.3), transparent 60%),
        radial-gradient(circle at 80% 100%, rgba(45, 212, 191, 0.25), transparent 60%);
    opacity: 0.8;
    pointer-events: none;
}

.students-problems-conclusion::after {
    content: "";
    position: absolute;
    inset-inline: 10%;
    bottom: 0.7rem;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(148, 163, 184, 0.7),
        transparent
    );
    opacity: 0.65;
}

.students-problems-conclusion > * {
    position: relative;
    z-index: 1;
}

.conclusion-label {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(226, 232, 240, 0.85);
    margin: 0 0 0.4rem;
}

.conclusion-text {
    margin: 0;
    font-size: 0.96rem;
    line-height: 1.7;
}

.conclusion-text strong {
    font-weight: 600;
}

/* Responsive */
@media (max-width: 900px) {
    .students-problems-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .students-problems-grid::before {
        display: none;
    }
}

@media (max-width: 640px) {
    .students-problems-inner {
        padding-inline: 1.25rem;
    }

    .students-problems-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .problem-card {
        padding: 1.15rem 1.05rem;
    }

    .students-problems-conclusion {
        padding: 1.4rem 1.2rem;
    }
}
/* Bloque 3: Solución CooBook */
.students-solution {
    width: 100%;
    background:
        radial-gradient(circle at 0% 0%, rgba(59, 130, 246, 0.06), transparent 55%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.05), transparent 55%),
        #f8fafc;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.students-solution-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.9rem, 5vw, 3.8rem) clamp(1.5rem, 4vw, 3rem);
}

/* Cabecera del bloque */
.students-solution-header {
    max-width: 760px;
    margin-bottom: clamp(2rem, 3.2vw, 2.6rem);
}

.solution-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.solution-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.7rem, 2.4vw, 2.05rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.solution-subtitle {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

/* Layout principal */
.students-solution-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.25fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna izquierda (explicación general) */
.solution-column-main {
    position: relative;
}

.solution-core-card {
    position: relative;
    border-radius: 22px;
    padding: 1.6rem 1.5rem 1.7rem;
    background:
        linear-gradient(140deg, rgba(15, 23, 42, 0.94), #020617);
    color: #e5e7eb;
    box-shadow:
        0 20px 40px rgba(15, 23, 42, 0.45),
        0 0 0 1px rgba(15, 23, 42, 0.75);
    overflow: hidden;
}

/* Decoración de líneas internas en el core card */
.solution-core-card::before,
.solution-core-card::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    opacity: 0.7;
    pointer-events: none;
}

.solution-core-card::before {
    inset-inline: 10%;
    top: 10%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(129, 140, 248, 0.7),
        transparent
    );
}

.solution-core-card::after {
    inset-inline: 12%;
    bottom: 10%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(45, 212, 191, 0.75),
        transparent
    );
}

.solution-core-title {
    margin: 0 0 0.75rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: #e5e7eb;
}

.solution-core-text {
    margin: 0 0 1.1rem;
    font-size: 0.92rem;
    line-height: 1.7;
    color: rgba(226, 232, 240, 0.86);
}

.solution-core-list {
    margin: 0;
    padding-left: 1.1rem;
    list-style: none;
    font-size: 0.9rem;
    color: rgba(226, 232, 240, 0.9);
}

.solution-core-list li {
    position: relative;
    padding-left: 0.6rem;
    line-height: 1.6;
}

.solution-core-list li::before {
    content: "";
    position: absolute;
    left: -0.65rem;
    top: 0.55rem;
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: radial-gradient(circle, #a5b4fc 0%, #4ade80 100%);
}

/* Columna derecha (lista de funciones) */
.solution-column-features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.3rem;
    align-items: stretch;
}

/* Ítems de solución */
.solution-item {
    position: relative;
    padding: 1.1rem 1rem 1.15rem;
    border-radius: 18px;
    background:
        linear-gradient(135deg, #ffffff, #f9fafb);
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow:
        0 14px 28px rgba(15, 23, 42, 0.04),
        0 0 0 1px rgba(148, 163, 184, 0.05);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

/* Resalte lateral suave */
.solution-item::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background:
        linear-gradient(180deg, rgba(59, 130, 246, 0.08), transparent);
    opacity: 0.55;
    mix-blend-mode: multiply;
    pointer-events: none;
}

/* Franja superior */
.solution-item::after {
    content: "";
    position: absolute;
    inset-inline: 0.75rem;
    top: 0.6rem;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(148, 163, 184, 0.8),
        transparent
    );
    opacity: 0.45;
}

/* Etiqueta numérica */
.solution-item-tag {
    position: relative;
    align-self: flex-start;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-size: 0.75rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: linear-gradient(120deg, #f9fafb, #ffffff);
}

/* Título del ítem */
.solution-item-title {
    position: relative;
    margin: 0;
    font-size: 0.96rem;
    font-weight: 600;
    color: #0f172a;
}

/* Texto del ítem */
.solution-item-text {
    position: relative;
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
    color: rgba(15, 23, 42, 0.8);
}

/* Último ítem más ancho para la exportación avanzada */
.solution-item-wide {
    grid-column: 1 / -1;
}

/* Responsive */
@media (max-width: 1024px) {
    .students-solution-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .solution-column-features {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .solution-core-card {
        margin-bottom: 1.8rem;
    }
}

@media (max-width: 720px) {
    .students-solution-inner {
        padding-inline: 1.25rem;
    }

    .solution-column-features {
        grid-template-columns: minmax(0, 1fr);
    }

    .solution-item {
        padding: 1.05rem 0.95rem 1.1rem;
    }
}
/* Bloque 4: Funciones revolucionarias - Título */
#students-features-title {
    width: 100%;
    background:
        radial-gradient(circle at 20% 0%, rgba(99, 102, 241, 0.12), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(16, 185, 129, 0.10), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
    padding: clamp(2.8rem, 6vw, 4rem) clamp(1.5rem, 4vw, 3rem);
}

.features-title-inner {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

/* Línea decorativa sutil detrás del título */
.features-title-inner::before {
    content: "";
    position: absolute;
    top: 35%;
    left: 50%;
    width: 70%;
    height: 1px;
    transform: translateX(-50%);
    background: linear-gradient(
        90deg,
        transparent,
        rgba(99, 102, 241, 0.55),
        transparent
    );
    opacity: 0.6;
}

/* Kicker */
.features-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.55);
    margin: 0 0 0.9rem;
}

/* Título principal */
.features-main-title {
    margin: 0 0 1rem;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    line-height: 1.25;
    color: #0f172a;
    font-weight: 700;
}

/* Subtexto */
.features-subtext {
    margin: 0 auto;
    max-width: 650px;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.78);
}

/* Responsive */
@media (max-width: 640px) {
    #students-features-title {
        padding-inline: 1.25rem;
    }

    .features-title-inner::before {
        width: 90%;
        opacity: 0.45;
    }

    .features-subtext {
        font-size: 0.95rem;
    }
}
/* Bloque 4.1: Función 1 - Sticky Notes inteligentes vinculados al párrafo */
.students-feature-1 {
    width: 100%;
    background:
        radial-gradient(circle at 10% 0%, rgba(129, 140, 248, 0.09), transparent 60%),
        radial-gradient(circle at 90% 100%, rgba(56, 189, 248, 0.07), transparent 60%),
        #f9fafb;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature1-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: center;
}

/* Columna de texto */
.feature1-text {
    position: relative;
}

.feature1-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature1-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature1-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature1-points p {
    margin: 0 0 0.75rem;
    font-size: 0.93rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature1-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature1-points li {
    margin-bottom: 0.35rem;
    line-height: 1.6;
}

/* Columna visual: simulación de página con sticky note */
.feature1-visual {
    display: flex;
    justify-content: center;
}

.feature1-page {
    position: relative;
    width: 100%;
    max-width: 380px;
    border-radius: 22px;
    background:
        linear-gradient(145deg, #ffffff, #f3f4f6);
    box-shadow:
        0 18px 40px rgba(15, 23, 42, 0.20),
        0 0 0 1px rgba(148, 163, 184, 0.45);
    padding: 1.2rem 1.1rem 1.25rem;
    overflow: hidden;
}

/* Cabecera de la "página" */
.feature1-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.9rem;
    font-size: 0.78rem;
    color: rgba(15, 23, 42, 0.7);
}

.page-label {
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-weight: 500;
}

.page-meta {
    font-variant-numeric: tabular-nums;
}

/* Párrafos simulados */
.feature1-paragraphs {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    margin-bottom: 1.4rem;
}

.page-paragraph {
    font-size: 0.83rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.86);
    background: rgba(248, 250, 252, 0.9);
    border-radius: 10px;
    padding: 0.45rem 0.5rem;
}

/* Párrafo vinculado al sticky note */
.page-paragraph-highlight {
    background:
        linear-gradient(120deg, rgba(254, 243, 199, 0.65), rgba(254, 249, 195, 0.95));
    box-shadow:
        inset 0 0 0 1px rgba(234, 179, 8, 0.35),
        0 0 0 1px rgba(248, 250, 252, 0.7);
}

/* Sticky Note */
.feature1-sticky-note {
    position: absolute;
    right: 1rem;
    bottom: 1.1rem;
    width: min(70%, 240px);
    border-radius: 14px;
    padding: 0.75rem 0.8rem 0.8rem;
    background:
        linear-gradient(145deg, #fef9c3, #fef3c7);
    box-shadow:
        0 10px 24px rgba(180, 83, 9, 0.22),
        0 0 0 1px rgba(202, 138, 4, 0.65);
}

/* Pin superior de la nota */
.feature1-sticky-note::before {
    content: "";
    position: absolute;
    top: -8px;
    left: 18px;
    width: 14px;
    height: 14px;
    border-radius: 999px;
    background: radial-gradient(circle, #f97316 0%, #b45309 70%);
    box-shadow:
        0 0 0 4px rgba(254, 243, 199, 0.85),
        0 6px 10px rgba(15, 23, 42, 0.4);
}

/* Esquinado inferior */
.feature1-sticky-note::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    border-style: solid;
    border-width: 0 0 16px 16px;
    border-color: transparent transparent rgba(253, 224, 171, 0.9) transparent;
    filter: drop-shadow(-3px -3px 4px rgba(0, 0, 0, 0.12));
}

.sticky-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #78350f;
    border: 1px solid rgba(217, 119, 6, 0.85);
    background: rgba(254, 252, 232, 0.95);
    margin-bottom: 0.45rem;
}

.sticky-text {
    margin: 0 0 0.3rem;
    font-size: 0.8rem;
    line-height: 1.5;
    color: #713f12;
}

.sticky-meta {
    margin: 0;
    font-size: 0.72rem;
    color: rgba(113, 63, 18, 0.85);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature1-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature1-visual {
        order: -1;
    }

    .feature1-page {
        max-width: 360px;
    }
}

@media (max-width: 640px) {
    .feature1-inner {
        padding-inline: 1.25rem;
    }

    .feature1-page {
        max-width: 100%;
    }

    .feature1-sticky-note {
        position: static;
        width: 100%;
        margin-top: 0.6rem;
    }

    .feature1-sticky-note::before {
        left: 16px;
    }
}
/* Bloque 4.2: Función 2 - Resumen Automático por Asignatura */
.students-feature-2 {
    width: 100%;
    background:
        radial-gradient(circle at 80% 0%, rgba(56, 189, 248, 0.08), transparent 60%),
        radial-gradient(circle at 10% 100%, rgba(129, 140, 248, 0.08), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature2-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: center;
}

/* Columna visual: panel de resúmenes */
.feature2-visual {
    display: flex;
    justify-content: center;
}

.feature2-board {
    width: 100%;
    max-width: 420px;
    border-radius: 24px;
    padding: 1.3rem 1.2rem 1.3rem;
    background:
        linear-gradient(145deg, #020617, #020617 40%, #0b1120 100%);
    box-shadow:
        0 24px 50px rgba(15, 23, 42, 0.6),
        0 0 0 1px rgba(15, 23, 42, 0.85);
    color: #e5e7eb;
    position: relative;
    overflow: hidden;
}

/* Líneas decorativas internas */
.feature2-board::before,
.feature2-board::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    pointer-events: none;
    opacity: 0.6;
}

.feature2-board::before {
    inset-inline: 8%;
    top: 16%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(129, 140, 248, 0.8),
        transparent
    );
}

.feature2-board::after {
    inset-inline: 10%;
    bottom: 12%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(45, 212, 191, 0.75),
        transparent
    );
}

/* Cabecera del panel */
.feature2-board-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.9rem;
    font-size: 0.8rem;
}

.board-title {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.88);
}

.board-meta {
    font-size: 0.78rem;
    color: rgba(148, 163, 184, 0.9);
}

/* Lista de asignaturas */
.feature2-subjects {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.1rem;
}

.subject-pill {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.45rem 0.65rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.6);
    font-size: 0.78rem;
}

.subject-pill-active {
    background: radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.5), transparent 55%),
                rgba(15, 23, 42, 0.98);
    border-color: rgba(96, 165, 250, 0.9);
    box-shadow:
        0 10px 22px rgba(37, 99, 235, 0.45),
        0 0 0 1px rgba(15, 23, 42, 0.9);
}

.subject-name {
    font-weight: 500;
}

.subject-progress {
    font-variant-numeric: tabular-nums;
    color: rgba(209, 213, 219, 0.95);
}

/* Bloque de resumen */
.feature2-summary-block {
    margin-top: 0.8rem;
    border-radius: 18px;
    padding: 0.85rem 0.9rem 0.95rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.35), transparent 65%),
        rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.85);
    box-shadow:
        0 16px 32px rgba(15, 23, 42, 0.6),
        0 0 0 1px rgba(15, 23, 42, 0.95);
}

/* Cabecera del resumen */
.summary-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.7rem;
}

.summary-chip {
    padding: 0.16rem 0.6rem;
    border-radius: 999px;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: 1px solid rgba(191, 219, 254, 0.9);
    color: #e5e7eb;
    background: rgba(15, 23, 42, 0.9);
}

.summary-chip.secondary {
    border-color: rgba(52, 211, 153, 0.9);
}

/* Contenido del resumen */
.summary-content {
    font-size: 0.8rem;
    color: rgba(226, 232, 240, 0.9);
}

.summary-label {
    margin: 0 0 0.2rem;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: rgba(209, 213, 219, 0.9);
}

.summary-text {
    margin: 0 0 0.45rem;
    line-height: 1.6;
}

.summary-list {
    margin: 0;
    padding-left: 1.1rem;
    list-style: disc;
}

.summary-list li {
    margin-bottom: 0.25rem;
    line-height: 1.5;
}

/* Columna de texto */
.feature2-text {
    position: relative;
}

.feature2-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature2-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature2-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature2-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature2-points li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature2-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature2-visual {
        order: -1;
    }

    .feature2-board {
        max-width: 380px;
    }
}

@media (max-width: 640px) {
    .feature2-inner {
        padding-inline: 1.25rem;
    }

    .feature2-board {
        max-width: 100%;
    }
}
/* Bloque 4.3: Función 3 - Conversión de Apuntes a Mapa Mental */
.students-feature-3 {
    width: 100%;
    background:
        radial-gradient(circle at 15% 0%, rgba(59, 130, 246, 0.10), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(45, 212, 191, 0.10), transparent 60%),
        #f8fafc;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature3-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: center;
}

/* Columna de texto */
.feature3-text {
    position: relative;
}

.feature3-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature3-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature3-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature3-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature3-points li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

/* Columna visual: mapa mental */
.feature3-visual {
    display: flex;
    justify-content: center;
}

.mindmap-board {
    position: relative;
    width: 100%;
    max-width: 420px;
    aspect-ratio: 4 / 3;
    border-radius: 26px;
    padding: 1.4rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.35), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.3), transparent 65%),
        #020617;
    box-shadow:
        0 24px 50px rgba(15, 23, 42, 0.65),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    overflow: hidden;
}

/* Líneas de fondo tipo rejilla suave */
.mindmap-board::before {
    content: "";
    position: absolute;
    inset: 8%;
    background-image:
        linear-gradient(
            to right,
            rgba(30, 64, 175, 0.35) 1px,
            transparent 1px
        ),
        linear-gradient(
            to bottom,
            rgba(15, 118, 110, 0.35) 1px,
            transparent 1px
        );
    background-size: 26px 26px;
    opacity: 0.25;
    pointer-events: none;
}

/* Nodo central */
.mindmap-center {
    position: absolute;
    inset: 50%;
    transform: translate(-50%, -50%);
    padding: 0.8rem 1.1rem;
    border-radius: 999px;
    background:
        radial-gradient(circle at 0 0, rgba(129, 140, 248, 0.9), transparent 70%),
        rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(191, 219, 254, 0.95);
    box-shadow:
        0 14px 32px rgba(37, 99, 235, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.95);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    align-items: center;
    text-align: center;
}

.mindmap-center-label {
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.mindmap-center-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #e5e7eb;
}

/* Nodos secundarios */
.mindmap-node {
    position: absolute;
    min-width: 130px;
    max-width: 170px;
    padding: 0.55rem 0.7rem;
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.9);
    box-shadow:
        0 10px 22px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.95);
    font-size: 0.8rem;
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

/* Posiciones de nodos */
.node-top-left {
    top: 14%;
    left: 10%;
}

.node-top-right {
    top: 14%;
    right: 10%;
}

.node-bottom-left {
    bottom: 16%;
    left: 8%;
}

.node-bottom-right {
    bottom: 16%;
    right: 8%;
}

.node-label {
    font-weight: 500;
}

.node-meta {
    font-size: 0.72rem;
    color: rgba(209, 213, 219, 0.9);
}

/* Conectores */
.mindmap-connector {
    position: absolute;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        rgba(191, 219, 254, 0.9),
        rgba(52, 211, 153, 0.9)
    );
}

/* Cada conector con posición y tamaño diferente */
.connector-top-left {
    top: 29%;
    left: 25%;
    width: 18%;
    height: 2px;
    transform-origin: left center;
    transform: rotate(-18deg);
}

.connector-top-right {
    top: 29%;
    right: 25%;
    width: 18%;
    height: 2px;
    transform-origin: right center;
    transform: rotate(18deg);
}

.connector-bottom-left {
    bottom: 28%;
    left: 25%;
    width: 18%;
    height: 2px;
    transform-origin: left center;
    transform: rotate(18deg);
}

.connector-bottom-right {
    bottom: 28%;
    right: 25%;
    width: 18%;
    height: 2px;
    transform-origin: right center;
    transform: rotate(-18deg);
}

/* Etiqueta inferior de origen */
.mindmap-origin {
    position: absolute;
    left: 50%;
    bottom: 0.9rem;
    transform: translateX(-50%);
    font-size: 0.74rem;
    color: rgba(226, 232, 240, 0.9);
    text-align: center;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.9);
    backdrop-filter: blur(10px);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature3-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature3-visual {
        order: -1;
    }
}

@media (max-width: 640px) {
    .feature3-inner {
        padding-inline: 1.25rem;
    }

    .mindmap-board {
        max-width: 100%;
        aspect-ratio: 4 / 3;
    }

    .mindmap-node {
        min-width: 120px;
        max-width: 150px;
    }
}
/* Bloque 4.4: Función 4 - Modo "Prepárame para el Examen" */
.students-feature-4 {
    width: 100%;
    background:
        radial-gradient(circle at 85% 0%, rgba(96, 165, 250, 0.12), transparent 60%),
        radial-gradient(circle at 10% 100%, rgba(52, 211, 153, 0.12), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature4-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: center;
}

/* Columna de texto */
.feature4-text {
    position: relative;
}

.feature4-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature4-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature4-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature4-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature4-points li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

/* Columna visual: panel del modo examen */
.feature4-visual {
    display: flex;
    justify-content: center;
}

.exam-panel {
    width: 100%;
    max-width: 430px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.25rem;
    background:
        radial-gradient(circle at 0 0, rgba(37, 99, 235, 0.4), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(16, 185, 129, 0.35), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    position: relative;
    overflow: hidden;
}

/* Líneas internas decorativas */
.exam-panel::before {
    content: "";
    position: absolute;
    inset-inline: 8%;
    top: 13%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(191, 219, 254, 0.9),
        transparent
    );
    opacity: 0.6;
}

.exam-panel::after {
    content: "";
    position: absolute;
    inset-inline: 10%;
    bottom: 10%;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(52, 211, 153, 0.9),
        transparent
    );
    opacity: 0.6;
}

/* Cabecera del modo examen */
.exam-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.exam-label {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.exam-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila de fecha y cuenta atrás */
.exam-date-row {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 0.9rem;
    margin-bottom: 1rem;
}

.exam-date-block,
.exam-countdown-block {
    border-radius: 16px;
    padding: 0.65rem 0.7rem;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.exam-date-label,
.exam-countdown-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(209, 213, 219, 0.9);
}

.exam-date-value {
    font-size: 0.88rem;
    font-weight: 500;
    color: #e5e7eb;
}

.exam-countdown-value {
    font-size: 1.4rem;
    font-weight: 600;
    color: #a5b4fc;
}

/* Fila de barras de progreso */
.exam-progress-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.7rem;
    margin-bottom: 1rem;
}

.exam-progress-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.55rem;
    align-items: center;
}

.exam-progress-label {
    font-size: 0.78rem;
    color: rgba(209, 213, 219, 0.92);
}

.exam-progress-bar {
    grid-column: 1 / -1;
    position: relative;
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    overflow: hidden;
    border: 1px solid rgba(30, 64, 175, 0.7);
}

.exam-progress-bar.bar-secondary {
    border-color: rgba(5, 150, 105, 0.8);
}

.exam-progress-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.1),
        rgba(59, 130, 246, 0.9),
        rgba(45, 212, 191, 0.95)
    );
    box-shadow:
        0 0 15px rgba(59, 130, 246, 0.9),
        0 0 25px rgba(45, 212, 191, 0.8);
}

.exam-progress-value {
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    color: rgba(229, 231, 235, 0.96);
}

/* Plan diario */
.exam-plan {
    margin-top: 0.3rem;
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.exam-plan-title {
    margin: 0 0 0.45rem;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.exam-plan-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.8rem;
    color: rgba(226, 232, 240, 0.95);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.exam-plan-list li {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 0.4rem;
    row-gap: 0.1rem;
}

.exam-step-label {
    font-weight: 600;
    color: rgba(191, 219, 254, 0.95);
}

.exam-step-text {
    line-height: 1.5;
}

.exam-step-meta {
    grid-column: 2 / -1;
    font-size: 0.72rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Nota inferior */
.exam-footer-note {
    margin-top: 0.55rem;
    font-size: 0.74rem;
    color: rgba(209, 213, 219, 0.88);
    text-align: right;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature4-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature4-visual {
        order: -1;
    }

    .exam-panel {
        max-width: 400px;
    }
}

@media (max-width: 640px) {
    .feature4-inner {
        padding-inline: 1.25rem;
    }

    .exam-panel {
        max-width: 100%;
    }

    .exam-date-row {
        grid-template-columns: minmax(0, 1fr);
    }
}
/* Bloque 4.5: Función 5 - Memorización con IA + Sistema tipo Leitner */
.students-feature-5 {
    width: 100%;
    background:
        radial-gradient(circle at 15% 0%, rgba(129, 140, 248, 0.10), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(56, 189, 248, 0.10), transparent 60%),
        #f9fafb;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature5-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna de texto */
.feature5-text {
    position: relative;
}

.feature5-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature5-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature5-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature5-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature5-points li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

/* Columna visual: panel Leitner */
.feature5-visual {
    display: flex;
    justify-content: center;
}

.leitner-panel {
    width: 100%;
    max-width: 440px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(37, 99, 235, 0.4), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(16, 185, 129, 0.35), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Cabecera */
.leitner-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.leitner-label {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.leitner-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Columnas de niveles (grid interno, sin posiciones absolutas) */
.leitner-columns {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.leitner-column {
    border-radius: 16px;
    padding: 0.7rem 0.75rem;
    background: rgba(15, 23, 42, 0.93);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.leitner-column-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.25rem;
}

.leitner-column-title {
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.leitner-column-count {
    font-size: 0.76rem;
    color: rgba(191, 219, 254, 0.95);
    font-variant-numeric: tabular-nums;
}

.leitner-column-desc {
    margin: 0;
    font-size: 0.74rem;
    line-height: 1.5;
    color: rgba(209, 213, 219, 0.92);
}

.leitner-column-meter {
    position: relative;
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(30, 64, 175, 0.70);
    overflow: hidden;
}

.leitner-meter-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.2),
        rgba(59, 130, 246, 0.9),
        rgba(52, 211, 153, 0.9)
    );
    box-shadow:
        0 0 16px rgba(59, 130, 246, 0.9),
        0 0 20px rgba(52, 211, 153, 0.85);
}

.leitner-column-status {
    margin: 0;
    font-size: 0.72rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Tarjeta de ejemplo (bloque completo bajo las columnas) */
.leitner-card-example {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.leitner-card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.4rem;
}

.leitner-card-label {
    font-size: 0.76rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.leitner-card-level {
    font-size: 0.76rem;
    color: rgba(191, 219, 254, 0.95);
}

.leitner-card-question {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.6;
    color: rgba(226, 232, 240, 0.96);
}

.leitner-card-answer {
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.6;
    color: rgba(209, 213, 219, 0.95);
}

.leitner-card-meta {
    margin: 0;
    font-size: 0.72rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature5-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature5-visual {
        order: -1;
    }

    .leitner-panel {
        max-width: 420px;
    }
}

@media (max-width: 800px) {
    .leitner-columns {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .feature5-inner {
        padding-inline: 1.25rem;
    }

    .leitner-panel {
        max-width: 100%;
    }

    .leitner-columns {
        grid-template-columns: minmax(0, 1fr);
    }
}
/* Bloque 4.6: Función 6 - Conversión de ecuaciones a pasos explicados */
.students-feature-6 {
    width: 100%;
    background:
        radial-gradient(circle at 80% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 10% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.feature6-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 5vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna de texto */
.feature6-text {
    position: relative;
}

.feature6-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0 0 0.6rem;
}

.feature6-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature6-lead {
    margin: 0 0 1.1rem;
    font-size: 0.98rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature6-points ul {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature6-points li {
    margin-bottom: 0.4rem;
    line-height: 1.7;
}

/* Columna visual: panel de ecuaciones */
.feature6-visual {
    display: flex;
    justify-content: center;
}

.equation-panel {
    width: 100%;
    max-width: 440px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(37, 99, 235, 0.4), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(16, 185, 129, 0.35), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera */
.equation-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.equation-label {
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.equation-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Bloque de ecuación original */
.equation-main {
    border-radius: 16px;
    padding: 0.7rem 0.75rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.equation-original-label {
    margin: 0;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.92);
}

.equation-original {
    margin: 0;
    font-size: 0.86rem;
    color: rgba(226, 232, 240, 0.96);
}

.equation-original span {
    font-weight: 600;
}

/* Pasos explicados */
.equation-steps {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.equation-steps-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.equation-step-list {
    margin: 0.1rem 0 0;
    padding-left: 1.1rem;
    font-size: 0.8rem;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.equation-step-list li {
    line-height: 1.6;
}

.step-title {
    display: block;
    font-weight: 500;
    margin-bottom: 0.05rem;
}

.step-text {
    display: block;
}

.step-text strong {
    font-weight: 600;
}

.step-note {
    display: block;
    font-size: 0.72rem;
    color: rgba(148, 163, 184, 0.95);
    margin-top: 0.1rem;
}

/* Pie del panel */
.equation-footer {
    margin-top: 0.15rem;
    font-size: 0.74rem;
    color: rgba(209, 213, 219, 0.88);
    text-align: right;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature6-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature6-visual {
        order: -1;
    }

    .equation-panel {
        max-width: 420px;
    }
}

@media (max-width: 640px) {
    .feature6-inner {
        padding-inline: 1.25rem;
    }

    .equation-panel {
        max-width: 100%;
    }
}
/* Bloque 4.7: Función 7 - Análisis académico */
.students-feature-7 {
    width: 100%;
    background:
        radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.11), transparent 60%),
        radial-gradient(circle at 90% 100%, rgba(129, 140, 248, 0.11), transparent 60%),
        #f8fafc;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature7-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna de texto */
.feature7-text {
    position: relative;
}

.feature7-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature7-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature7-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature7-points ul {
    padding-left: 1.15rem;
    margin: 0;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature7-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature7-visual {
    display: flex;
    justify-content: center;
}

.analysis-panel {
    width: 100%;
    max-width: 430px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.35), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    overflow: hidden;
}

/* Cabecera */
.analysis-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.analysis-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.analysis-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Bloques */
.analysis-block {
    border-radius: 16px;
    padding: 0.9rem;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.analysis-section-title {
    margin: 0;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(209, 213, 219, 0.95);
}

.analysis-keywords {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.analysis-keywords li {
    padding: 0.25rem 0.55rem;
    background: rgba(30, 41, 59, 0.8);
    border-radius: 999px;
    font-size: 0.76rem;
    border: 1px solid rgba(96, 165, 250, 0.7);
}

.analysis-text {
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.6;
    color: rgba(226, 232, 240, 0.96);
}

.analysis-logic-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.78rem;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.analysis-footer {
    margin-top: 0.1rem;
    text-align: right;
    font-size: 0.74rem;
    color: rgba(209, 213, 219, 0.88);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature7-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature7-visual {
        order: -1;
    }
}

@media (max-width: 640px) {
    .feature7-inner {
        padding-inline: 1.25rem;
    }

    .analysis-panel {
        max-width: 100%;
    }
}
/* Bloque 4.8: Función 8 - Comparador de capítulos para estudiar diferencias */
.students-feature-8 {
    width: 100%;
    background:
        radial-gradient(circle at 85% 0%, rgba(96, 165, 250, 0.12), transparent 60%),
        radial-gradient(circle at 10% 100%, rgba(52, 211, 153, 0.12), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature8-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna de texto */
.feature8-text {
    position: relative;
}

.feature8-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature8-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature8-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature8-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature8-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature8-visual {
    display: flex;
    justify-content: center;
}

.compare-panel {
    width: 100%;
    max-width: 460px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera */
.compare-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.compare-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.compare-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Columnas de comparación (todo con grid, sin posiciones absolutas) */
.compare-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
}

.compare-column {
    border-radius: 16px;
    padding: 0.8rem 0.85rem;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.compare-column-header {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.compare-column-title {
    font-size: 0.84rem;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.compare-column-sub {
    font-size: 0.76rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Lista de ítems */
.compare-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.compare-item {
    font-size: 0.78rem;
    line-height: 1.5;
    border-radius: 10px;
    padding: 0.35rem 0.45rem;
}

/* Estados visuales */
.compare-item.equal {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(75, 85, 99, 0.9);
    color: rgba(229, 231, 235, 0.96);
}

.compare-item.changed {
    background: rgba(30, 64, 175, 0.25);
    border: 1px solid rgba(96, 165, 250, 0.9);
    color: rgba(219, 234, 254, 0.98);
}

.compare-item.added {
    background: rgba(5, 150, 105, 0.25);
    border: 1px solid rgba(52, 211, 153, 0.95);
    color: rgba(209, 250, 229, 0.98);
}

.compare-item.removed {
    background: rgba(185, 28, 28, 0.25);
    border: 1px solid rgba(248, 113, 113, 0.95);
    color: rgba(254, 226, 226, 0.98);
}

/* Leyenda */
.compare-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.2rem;
}

.legend-item {
    font-size: 0.72rem;
    border-radius: 999px;
    padding: 0.2rem 0.55rem;
    border: 1px solid rgba(148, 163, 184, 0.85);
    background: rgba(15, 23, 42, 0.92);
}

.legend-equal {
    border-color: rgba(75, 85, 99, 0.9);
}

.legend-changed {
    border-color: rgba(96, 165, 250, 0.9);
}

.legend-added {
    border-color: rgba(52, 211, 153, 0.95);
}

.legend-removed {
    border-color: rgba(248, 113, 113, 0.95);
}

/* Pie del panel */
.compare-footer {
    margin: 0.2rem 0 0;
    font-size: 0.76rem;
    color: rgba(209, 213, 219, 0.9);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature8-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature8-visual {
        order: -1;
    }

    .compare-panel {
        max-width: 440px;
    }
}

@media (max-width: 640px) {
    .feature8-inner {
        padding-inline: 1.25rem;
    }

    .compare-panel {
        max-width: 100%;
    }

    .compare-columns {
        grid-template-columns: minmax(0, 1fr);
    }
}
/* Bloque 4.9: Función 9 - Lector técnico para PDFs científicos */
.students-feature-9 {
    width: 100%;
    background:
        radial-gradient(circle at 15% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #f9fafb;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature9-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna de texto */
.feature9-text {
    position: relative;
}

.feature9-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature9-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature9-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature9-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature9-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature9-visual {
    display: flex;
    justify-content: center;
}

.pdf-panel {
    width: 100%;
    max-width: 480px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera */
.pdf-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.pdf-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.pdf-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Layout interno: índice + página (todo grid, sin absolutos) */
.pdf-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
    gap: 0.9rem;
}

/* Índice lateral */
.pdf-toc {
    border-radius: 16px;
    padding: 0.7rem 0.75rem;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.pdf-toc-title {
    margin: 0;
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.pdf-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.pdf-toc-list li {
    padding: 0.25rem 0.35rem;
    border-radius: 999px;
    color: rgba(209, 213, 219, 0.9);
}

.pdf-toc-list li.active {
    background: rgba(59, 130, 246, 0.25);
    border: 1px solid rgba(96, 165, 250, 0.9);
    color: rgba(219, 234, 254, 0.98);
}

/* Página técnica */
.pdf-page {
    border-radius: 18px;
    padding: 0.8rem 0.85rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    font-size: 0.8rem;
}

/* Bloque de resumen/sección */
.pdf-section-block {
    border-radius: 12px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(75, 85, 99, 0.9);
}

.pdf-section-label {
    margin: 0 0 0.2rem;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.pdf-section-text {
    margin: 0;
    line-height: 1.6;
    color: rgba(226, 232, 240, 0.96);
}

/* Grid de highlights (ecuación + figura) */
.pdf-highlight-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
}

.pdf-highlight-block {
    border-radius: 12px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(96, 165, 250, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.pdf-highlight-title {
    margin: 0;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(219, 234, 254, 0.95);
}

.pdf-highlight-content {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.5;
    color: rgba(226, 232, 240, 0.96);
}

.pdf-highlight-content sub {
    font-size: 0.7em;
}

.pdf-highlight-note {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Bloque de referencia */
.pdf-ref-block {
    border-radius: 12px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.85);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.pdf-ref-title {
    margin: 0;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(209, 213, 219, 0.95);
}

.pdf-ref-text {
    margin: 0;
    line-height: 1.5;
    color: rgba(226, 232, 240, 0.96);
}

.pdf-ref-note {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Responsive */
@media (max-width: 1024px) {
    .feature9-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature9-visual {
        order: -1;
    }

    .pdf-panel {
        max-width: 460px;
    }
}

@media (max-width: 768px) {
    .pdf-layout {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .feature9-inner {
        padding-inline: 1.25rem;
    }

    .pdf-panel {
        max-width: 100%;
    }

    .pdf-highlight-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}
/* Bloque 4.10: Función 10 - Modo Tesis / Trabajo Final */
.students-feature-10 {
    width: 100%;
    background:
        radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.11), transparent 60%),
        radial-gradient(circle at 90% 100%, rgba(129, 140, 248, 0.11), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature10-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.feature10-text {
    position: relative;
}

.feature10-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature10-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature10-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature10-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature10-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature10-visual {
    display: flex;
    justify-content: center;
}

.thesis-panel {
    width: 100%;
    max-width: 480px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Cabecera */
.thesis-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.thesis-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.thesis-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila de estado general */
.thesis-status-row {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 0.8rem;
}

.thesis-status-block {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.thesis-status-label {
    margin: 0;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.thesis-status-bar {
    position: relative;
    width: 100%;
    height: 7px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(30, 64, 175, 0.7);
    overflow: hidden;
}

.thesis-status-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.2),
        rgba(59, 130, 246, 0.9),
        rgba(52, 211, 153, 0.95)
    );
    box-shadow:
        0 0 16px rgba(59, 130, 246, 0.9),
        0 0 20px rgba(52, 211, 153, 0.85);
}

.thesis-status-value {
    margin: 0;
    font-size: 0.8rem;
    color: rgba(229, 231, 235, 0.96);
}

.thesis-deadline {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(229, 231, 235, 0.98);
}

.thesis-deadline-note {
    margin: 0;
    font-size: 0.78rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Secciones de tesis */
.thesis-sections {
    border-radius: 18px;
    padding: 0.9rem 0.95rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.thesis-sections-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.thesis-section-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
}

.thesis-section-card {
    border-radius: 14px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    font-size: 0.78rem;
}

.thesis-section-name {
    margin: 0;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.thesis-section-state {
    margin: 0;
    font-size: 0.74rem;
}

.state-complete {
    color: rgba(52, 211, 153, 0.95);
}

.state-progress {
    color: rgba(96, 165, 250, 0.95);
}

.state-draft {
    color: rgba(250, 204, 21, 0.95);
}

.state-pending {
    color: rgba(248, 113, 113, 0.95);
}

.thesis-section-note {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila inferior: tareas y fuentes */
.thesis-bottom-row {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 0.8rem;
}

.thesis-tasks,
.thesis-sources {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.thesis-tasks-title,
.thesis-sources-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.thesis-tasks-list,
.thesis-sources-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature10-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature10-visual {
        order: -1;
    }

    .thesis-panel {
        max-width: 480px;
    }
}

@media (max-width: 768px) {
    .thesis-status-row,
    .thesis-bottom-row {
        grid-template-columns: minmax(0, 1fr);
    }

    .thesis-section-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .feature10-inner {
        padding-inline: 1.25rem;
    }

    .thesis-panel {
        max-width: 100%;
    }
}
/* Bloque 4.11: Función 11 - Revisión de bibliografía automática */
.students-feature-11 {
    width: 100%;
    background:
        radial-gradient(circle at 15% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #f8fafc;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature11-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.feature11-text {
    position: relative;
}

.feature11-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature11-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature11-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature11-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature11-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature11-visual {
    display: flex;
    justify-content: center;
}

.biblio-panel {
    width: 100%;
    max-width: 480px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera */
.biblio-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.biblio-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.biblio-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Resumen numérico (grid, sin absolutos) */
.biblio-summary-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0.8rem;
}

.biblio-summary-card {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.biblio-summary-label {
    margin: 0;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.biblio-summary-value {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    color: rgba(229, 231, 235, 0.98);
}

.biblio-summary-note {
    margin: 0;
    font-size: 0.76rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Calidad de bibliografía */
.biblio-quality {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.biblio-quality-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.biblio-quality-bars {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.biblio-quality-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 0.5rem;
    row-gap: 0.2rem;
    align-items: center;
}

.biblio-quality-label {
    font-size: 0.78rem;
    color: rgba(226, 232, 240, 0.96);
}

.biblio-quality-bar {
    grid-column: 1 / -1;
    position: relative;
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(30, 64, 175, 0.7);
    overflow: hidden;
}

.biblio-quality-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
}

.fill-ok {
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.2),
        rgba(59, 130, 246, 0.9),
        rgba(52, 211, 153, 0.95)
    );
    box-shadow:
        0 0 16px rgba(59, 130, 246, 0.9),
        0 0 18px rgba(52, 211, 153, 0.8);
}

.fill-warning {
    background: linear-gradient(
        90deg,
        rgba(250, 204, 21, 0.25),
        rgba(250, 204, 21, 0.9)
    );
    box-shadow:
        0 0 14px rgba(250, 204, 21, 0.9);
}

.fill-error {
    background: linear-gradient(
        90deg,
        rgba(248, 113, 113, 0.3),
        rgba(248, 113, 113, 0.95)
    );
    box-shadow:
        0 0 14px rgba(248, 113, 113, 0.95);
}

.biblio-quality-value {
    font-size: 0.78rem;
    font-variant-numeric: tabular-nums;
    color: rgba(229, 231, 235, 0.96);
}

/* Lista de ejemplos */
.biblio-list-block {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.biblio-list-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.biblio-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.biblio-item {
    border-radius: 12px;
    padding: 0.5rem 0.55rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.item-ok {
    border-color: rgba(52, 211, 153, 0.9);
}

.item-warning {
    border-color: rgba(250, 204, 21, 0.9);
}

.item-error {
    border-color: rgba(248, 113, 113, 0.95);
}

.biblio-item-main {
    color: rgba(226, 232, 240, 0.98);
}

.biblio-item-note {
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Pie */
.biblio-footer {
    margin: 0.1rem 0 0;
    font-size: 0.74rem;
    color: rgba(209, 213, 219, 0.88);
    text-align: right;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature11-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature11-visual {
        order: -1;
    }

    .biblio-panel {
        max-width: 480px;
    }
}

@media (max-width: 768px) {
    .biblio-summary-row {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .feature11-inner {
        padding-inline: 1.25rem;
    }

    .biblio-panel {
        max-width: 100%;
    }
}
/* Bloque 4.12: Función 12 - Clases sincronizadas: libro + profesor + cronograma */
.students-feature-12 {
    width: 100%;
    background:
        radial-gradient(circle at 85% 0%, rgba(96, 165, 250, 0.12), transparent 60%),
        radial-gradient(circle at 10% 100%, rgba(52, 211, 153, 0.12), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.feature12-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.feature12-text {
    position: relative;
}

.feature12-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.feature12-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.3rem, 2vw, 1.65rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.feature12-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.feature12-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.feature12-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.feature12-visual {
    display: flex;
    justify-content: center;
}

.sync-panel {
    width: 100%;
    max-width: 480px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera */
.sync-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sync-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.sync-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Bloque clase de hoy */
.sync-today {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.3fr);
    gap: 0.8rem;
}

.sync-today-info,
.sync-today-book {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.sync-today-label {
    margin: 0;
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.sync-today-title {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.sync-today-sub {
    margin: 0;
    font-size: 0.78rem;
    color: rgba(148, 163, 184, 0.95);
}

.sync-book-label {
    margin: 0;
    font-size: 0.76rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.sync-book-main {
    margin: 0;
    font-size: 0.86rem;
    color: rgba(226, 232, 240, 0.98);
}

.sync-book-note {
    margin: 0;
    font-size: 0.76rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Cronograma */
.sync-timeline {
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.sync-timeline-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.sync-timeline-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
}

.sync-slot {
    border-radius: 14px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.9);
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.slot-past {
    border-color: rgba(148, 163, 184, 0.9);
}

.slot-current {
    border-color: rgba(59, 130, 246, 0.95);
    box-shadow: 0 0 14px rgba(59, 130, 246, 0.75);
}

.slot-next {
    border-color: rgba(52, 211, 153, 0.95);
}

.sync-slot-date {
    margin: 0;
    font-size: 0.76rem;
    color: rgba(209, 213, 219, 0.95);
}

.sync-slot-topic {
    margin: 0;
    color: rgba(226, 232, 240, 0.98);
}

.sync-slot-state {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Relación con estudio */
.sync-study-link {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.78rem;
}

.sync-study-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.sync-study-list {
    list-style: none;
    margin: 0;
    padding: 0;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .feature12-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature12-visual {
        order: -1;
    }

    .sync-panel {
        max-width: 480px;
    }
}

@media (max-width: 768px) {
    .sync-today {
        grid-template-columns: minmax(0, 1fr);
    }

    .sync-timeline-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .feature12-inner {
        padding-inline: 1.25rem;
    }

    .sync-panel {
        max-width: 100%;
    }
}
/* Bloque 5: Línea Académica Integrada */
.students-academic-line {
    width: 100%;
    background:
        radial-gradient(circle at 12% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 88% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #f9fafb;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.academic-line-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.academic-line-text {
    position: relative;
}

.academic-line-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.academic-line-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.35rem, 2.2vw, 1.8rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.academic-line-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.academic-line-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.academic-line-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

/* Columna visual */
.academic-line-visual {
    display: flex;
    justify-content: center;
}

.academic-panel {
    width: 100%;
    max-width: 520px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera panel */
.academic-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.academic-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.academic-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila superior */
.academic-top-row {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
    gap: 0.8rem;
}

.academic-subtitle {
    margin: 0 0 0.35rem;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

/* Asignaturas activas */
.academic-subjects {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.academic-subjects-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.academic-subjects-list li {
    padding: 0.35rem 0.4rem;
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.subject-name {
    color: rgba(226, 232, 240, 0.98);
    font-weight: 500;
}

.subject-meta {
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Tiempo dedicado */
.academic-time {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.academic-time-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.45rem;
}

.time-item {
    border-radius: 12px;
    padding: 0.45rem 0.5rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    font-size: 0.78rem;
}

.time-label {
    margin: 0;
    color: rgba(209, 213, 219, 0.95);
}

.time-value {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.time-note {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila central: progreso + objetivos */
.academic-middle-row {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.1fr);
    gap: 0.8rem;
}

/* Progreso de lectura */
.academic-progress {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.progress-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.78rem;
}

.progress-label-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.4rem;
}

.progress-label {
    color: rgba(226, 232, 240, 0.98);
}

.progress-percent {
    font-variant-numeric: tabular-nums;
    color: rgba(191, 219, 254, 0.98);
}

.progress-bar {
    position: relative;
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(30, 64, 175, 0.7);
    overflow: hidden;
}

.progress-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.2),
        rgba(59, 130, 246, 0.9),
        rgba(52, 211, 153, 0.95)
    );
    box-shadow:
        0 0 16px rgba(59, 130, 246, 0.9),
        0 0 18px rgba(52, 211, 153, 0.8);
}

/* Objetivos semanales */
.academic-goals {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.academic-goals-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.academic-goals-list li {
    border-radius: 10px;
    padding: 0.4rem 0.45rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.4rem;
}

.goal-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    border: 1px solid transparent;
    white-space: nowrap;
}

.goal-ontrack {
    border-color: rgba(59, 130, 246, 0.9);
    color: rgba(191, 219, 254, 0.98);
}

.goal-pending {
    border-color: rgba(250, 204, 21, 0.9);
    color: rgba(254, 243, 199, 0.98);
}

.goal-done {
    border-color: rgba(52, 211, 153, 0.95);
    color: rgba(209, 250, 229, 0.98);
}

/* Fila inferior: exámenes + historial */
.academic-bottom-row {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    gap: 0.8rem;
}

/* Exámenes */
.academic-exams {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.academic-exams-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.academic-exams-list li {
    border-radius: 10px;
    padding: 0.4rem 0.45rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.exam-main {
    color: rgba(226, 232, 240, 0.98);
}

.exam-meta {
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Historial de estudio */
.academic-history {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
}

.academic-history-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.78rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.academic-history-list li {
    border-radius: 10px;
    padding: 0.35rem 0.4rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    color: rgba(226, 232, 240, 0.96);
}

/* Responsive */
@media (max-width: 1024px) {
    .academic-line-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .academic-line-visual {
        order: -1;
    }

    .academic-panel {
        max-width: 520px;
    }
}

@media (max-width: 900px) {
    .academic-top-row,
    .academic-middle-row,
    .academic-bottom-row {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .academic-line-inner {
        padding-inline: 1.25rem;
    }

    .academic-panel {
        max-width: 100%;
    }

    .academic-goals-list li {
        flex-direction: column;
        align-items: flex-start;
    }
}
/* Bloque 6: Modo Estudio / Concentración */
.students-focus-mode {
    width: 100%;
    background:
        radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.11), transparent 60%),
        radial-gradient(circle at 90% 100%, rgba(129, 140, 248, 0.11), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.focus-mode-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.focus-mode-text {
    position: relative;
}

.focus-mode-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.focus-mode-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.35rem, 2.2vw, 1.8rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.focus-mode-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.focus-mode-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.focus-mode-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

.focus-mode-points strong {
    font-weight: 600;
}

/* Columna visual */
.focus-mode-visual {
    display: flex;
    justify-content: center;
}

.focus-panel {
    width: 100%;
    max-width: 520px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera panel */
.focus-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.focus-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.focus-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Fila: timer + stats */
.focus-session-row {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
    gap: 0.8rem;
}

/* Timer */
.focus-timer-block {
    border-radius: 16px;
    padding: 0.8rem 0.85rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.focus-timer-label {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.focus-timer-time {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: rgba(248, 250, 252, 0.98);
}

.focus-timer-note {
    margin: 0;
    font-size: 0.78rem;
    color: rgba(148, 163, 184, 0.95);
}

.focus-timer-bar {
    position: relative;
    width: 100%;
    height: 7px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(30, 64, 175, 0.7);
    overflow: hidden;
}

.focus-timer-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        rgba(59, 130, 246, 0.2),
        rgba(59, 130, 246, 0.9),
        rgba(52, 211, 153, 0.95)
    );
    box-shadow:
        0 0 16px rgba(59, 130, 246, 0.9),
        0 0 18px rgba(52, 211, 153, 0.8);
}

/* Stats */
.focus-stats-block {
    border-radius: 16px;
    padding: 0.8rem 0.85rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    font-size: 0.78rem;
}

.focus-stats-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.focus-stats-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.focus-stats-list li {
    display: flex;
    justify-content: space-between;
    gap: 0.4rem;
}

.focus-stats-list span {
    color: rgba(226, 232, 240, 0.96);
}

.focus-stats-list strong {
    font-variant-numeric: tabular-nums;
    color: rgba(191, 219, 254, 0.98);
}

/* Fila media: notas + revisión */
.focus-middle-row {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
    gap: 0.8rem;
}

.focus-subtitle {
    margin: 0 0 0.35rem;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

/* Notas rápidas */
.focus-notes {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.focus-note-card {
    border-radius: 12px;
    padding: 0.5rem 0.55rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    font-size: 0.78rem;
}

.focus-note-text {
    margin: 0;
    color: rgba(226, 232, 240, 0.98);
}

.focus-note-meta {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Revisión activa */
.focus-review {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.78rem;
}

.focus-review-list {
    list-style: none;
    margin: 0;
    padding: 0;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* Fila inferior: bloqueos */
.focus-bottom-row {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    font-size: 0.78rem;
}

.focus-toggles {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.focus-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.4rem;
}

.toggle-label {
    color: rgba(226, 232, 240, 0.96);
}

.toggle-pill {
    font-size: 0.72rem;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    border: 1px solid transparent;
    white-space: nowrap;
}

.toggle-on {
    border-color: rgba(52, 211, 153, 0.95);
    color: rgba(209, 250, 229, 0.98);
    background: rgba(22, 101, 52, 0.6);
}

.toggle-off {
    border-color: rgba(148, 163, 184, 0.95);
    color: rgba(209, 213, 219, 0.98);
    background: rgba(15, 23, 42, 0.9);
}

.focus-bottom-note {
    margin: 0;
    font-size: 0.74rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Responsive */
@media (max-width: 1024px) {
    .focus-mode-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .focus-mode-visual {
        order: -1;
    }

    .focus-panel {
        max-width: 520px;
    }
}

@media (max-width: 900px) {
    .focus-session-row,
    .focus-middle-row {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .focus-mode-inner {
        padding-inline: 1.25rem;
    }

    .focus-panel {
        max-width: 100%;
    }

    .focus-toggle {
        flex-direction: column;
        align-items: flex-start;
    }
}
/* Bloque 7: Conexión con el ecosistema CooBook */
.students-ecosystem {
    width: 100%;
    background:
        radial-gradient(circle at 15% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 85% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #f8fafc;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.ecosystem-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 3rem);
    align-items: flex-start;
}

/* Columna texto */
.ecosystem-text {
    position: relative;
}

.ecosystem-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.ecosystem-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.35rem, 2.2vw, 1.8rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.ecosystem-lead {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

.ecosystem-points ul {
    margin: 0;
    padding-left: 1.15rem;
    list-style: disc;
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.86);
}

.ecosystem-points li {
    margin-bottom: 0.45rem;
    line-height: 1.7;
}

.ecosystem-points strong {
    font-weight: 600;
}

/* Columna visual */
.ecosystem-visual {
    display: flex;
    justify-content: center;
}

.ecosystem-panel {
    width: 100%;
    max-width: 520px;
    border-radius: 24px;
    padding: 1.4rem 1.3rem 1.3rem;
    background:
        radial-gradient(circle at 0 0, rgba(59, 130, 246, 0.32), transparent 65%),
        radial-gradient(circle at 100% 100%, rgba(45, 212, 191, 0.28), transparent 65%),
        #020617;
    box-shadow:
        0 26px 54px rgba(15, 23, 42, 0.7),
        0 0 0 1px rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* Cabecera panel */
.ecosystem-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.ecosystem-label {
    font-size: 0.76rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(219, 234, 254, 0.95);
}

.ecosystem-meta {
    font-size: 0.8rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Centro: e-reader */
.ecosystem-center {
    border-radius: 18px;
    padding: 0.8rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(96, 165, 250, 0.95);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    text-align: left;
}

.ecosystem-center-title {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.ecosystem-center-note {
    margin: 0;
    font-size: 0.78rem;
    color: rgba(148, 163, 184, 0.95);
}

/* Grid de nodos (sin posiciones absolutas) */
.ecosystem-grid {
    margin-top: 0.2rem;
    border-radius: 18px;
    padding: 0.85rem 0.9rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
}

.ecosystem-node {
    border-radius: 14px;
    padding: 0.55rem 0.6rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(51, 65, 85, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    font-size: 0.78rem;
}

.ecosystem-node .node-title {
    margin: 0;
    font-weight: 500;
    color: rgba(226, 232, 240, 0.98);
}

.ecosystem-node .node-text {
    margin: 0;
    color: rgba(148, 163, 184, 0.95);
    line-height: 1.5;
}

.ecosystem-node.node-chain {
    border-color: rgba(52, 211, 153, 0.95);
    box-shadow: 0 0 14px rgba(52, 211, 153, 0.7);
}

/* Estado de sincronización */
.ecosystem-sync {
    border-radius: 16px;
    padding: 0.75rem 0.8rem;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.9);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.78rem;
}

.ecosystem-sync-title {
    margin: 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(209, 213, 219, 0.95);
}

.ecosystem-sync-list {
    list-style: none;
    margin: 0;
    padding: 0;
    color: rgba(226, 232, 240, 0.96);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .ecosystem-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .ecosystem-visual {
        order: -1;
    }

    .ecosystem-panel {
        max-width: 520px;
    }
}

@media (max-width: 768px) {
    .ecosystem-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .ecosystem-inner {
        padding-inline: 1.25rem;
    }

    .ecosystem-panel {
        max-width: 100%;
    }
}
/* Bloque 8: Comparativa vs dispositivos tradicionales */
.students-comparison {
    width: 100%;
    background:
        radial-gradient(circle at 12% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 88% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.comparison-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

/* Texto */
.comparison-text {
    max-width: 700px;
}

.comparison-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.comparison-title {
    margin: 0 0 0.9rem;
    font-size: clamp(1.35rem, 2.2vw, 1.8rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.comparison-lead {
    margin: 0;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

/* Tabla centrada y compacta */
.comparison-table-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 0.8rem;
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    max-width: 720px;
    border-collapse: collapse;
    background: #f9fafb;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    font-size: 0.95rem;
}

.comparison-table thead {
    background: rgba(15, 23, 42, 0.04);
}

.comparison-table th,
.comparison-table td {
    padding: 0.65rem 1.1rem;
    text-align: center;
    border-bottom: 1px solid rgba(148, 163, 184, 0.35);
    white-space: nowrap;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    white-space: normal;
}

.comparison-table th {
    font-weight: 600;
    color: #0f172a;
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

/* Colores Sí / No */
.comparison-table td.yes {
    color: #047857;
    font-weight: 600;
}

.comparison-table td.no {
    color: #b91c1c;
    font-weight: 600;
}

/* Zebra suave */
.comparison-table tbody tr:nth-child(odd) {
    background: rgba(249, 250, 251, 0.9);
}

.comparison-table tbody tr:nth-child(even) {
    background: rgba(241, 245, 249, 0.9);
}

/* Responsive */
@media (max-width: 640px) {
    .comparison-inner {
        padding-inline: 1.25rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.55rem 0.7rem;
        font-size: 0.88rem;
    }
}

/* Bloque 9: FAQ Estudiantes */
.students-faq {
    width: 100%;
    background:
        radial-gradient(circle at 10% 0%, rgba(56, 189, 248, 0.10), transparent 60%),
        radial-gradient(circle at 90% 100%, rgba(129, 140, 248, 0.10), transparent 60%),
        #f9fafb;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.students-faq-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(2.8rem, 6vw, 3.6rem) clamp(1.5rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

/* Cabecera */
.students-faq-header {
    text-align: left;
}

.students-faq-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin-bottom: 0.6rem;
}

.students-faq-title {
    margin: 0 0 0.8rem;
    font-size: clamp(1.35rem, 2.2vw, 1.8rem);
    line-height: 1.3;
    color: #0f172a;
    font-weight: 600;
}

.students-faq-lead {
    margin: 0;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

/* Lista FAQ */
.students-faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

/* Item FAQ */
.students-faq-item {
    border-radius: 14px;
    background: rgba(248, 250, 252, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.5);
    overflow: hidden;
}

/* Q: summary */
.students-faq-question {
    list-style: none;
    cursor: pointer;
    padding: 0.8rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    color: #0f172a;
}

.students-faq-question::-webkit-details-marker {
    display: none;
}

/* Icono + / - */
.faq-icon {
    font-size: 1rem;
    font-weight: 600;
    color: rgba(15, 23, 42, 0.65);
    transition: transform 0.2s ease, color 0.2s ease;
}

/* Respuesta */
.students-faq-answer {
    padding: 0 1rem 0.9rem;
    border-top: 1px solid rgba(148, 163, 184, 0.4);
    font-size: 0.9rem;
    color: rgba(15, 23, 42, 0.82);
}

.students-faq-answer p {
    margin: 0.7rem 0 0;
    line-height: 1.7;
}

/* Estados hover/focus */
.students-faq-item:hover .students-faq-question {
    background: rgba(239, 246, 255, 0.9);
}

.students-faq-item:focus-within {
    outline: 2px solid rgba(59, 130, 246, 0.8);
    outline-offset: 2px;
}

/* Cambiar icono cuando está abierto */
.students-faq-item[open] .faq-icon {
    transform: rotate(45deg);
    color: rgba(37, 99, 235, 0.95);
}

/* Responsive */
@media (max-width: 640px) {
    .students-faq-inner {
        padding-inline: 1.25rem;
    }

    .students-faq-question {
        padding: 0.75rem 0.85rem;
    }

    .students-faq-answer {
        padding: 0 0.85rem 0.85rem;
    }
}
/* Bloque 10: Bloque Final + CTA */
.students-final-cta {
    width: 100%;
    background:
        radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12), transparent 65%),
        #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.final-cta-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(3rem, 7vw, 4rem) clamp(1.5rem, 4vw, 3rem) clamp(3.2rem, 7vw, 4.2rem);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
}

.final-cta-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(15, 23, 42, 0.6);
    margin: 0;
}

.final-cta-title {
    margin: 0;
    font-size: clamp(1.6rem, 2.5vw, 2rem);
    line-height: 1.25;
    color: #0f172a;
    font-weight: 650;
}

.final-cta-lead {
    margin: 0 auto;
    max-width: 640px;
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(15, 23, 42, 0.82);
}



/* Nota final */
.final-cta-footnote {
    margin: 0 auto;
    max-width: 620px;
    font-size: 0.85rem;
    line-height: 1.7;
    color: rgba(75, 85, 99, 0.95);
}

/* Hover solo visual, sin interacción real */
.final-cta-button:hover {
    transform: translateY(-1px);
    box-shadow:
        0 14px 30px rgba(37, 99, 235, 0.4),
        0 0 0 1px rgba(15, 23, 42, 0.38);
}

.final-cta-secondary:hover {
    box-shadow:
        0 14px 28px rgba(15, 23, 42, 0.4),
        0 0 0 1px rgba(15, 23, 42, 0.7);
}

.final-cta-outline:hover {
    box-shadow:
        0 0 0 1px rgba(15, 23, 42, 0.35),
        0 10px 22px rgba(15, 23, 42, 0.18);
}

/* Responsive */
@media (max-width: 640px) {
    .final-cta-inner {
        padding-inline: 1.25rem;
    }

    .final-cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .final-cta-button {
        width: 100%;
    }
}
/* Bloque Final: Reserva e-reader */
.students-reserve {
    width: 100%;
    background:
        radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12), transparent 65%),
        #ffffff;
    border-top: 1px solid rgba(15, 23, 42, 0.05);
    padding: clamp(3.2rem, 7vw, 4.4rem) 0;
}

.reserve-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
}

.reserve-title {
    margin: 0;
    font-size: clamp(1.7rem, 2.6vw, 2.1rem);
    line-height: 1.25;
    color: #0f172a;
    font-weight: 650;
}

.reserve-lead {
    margin: 0 auto;
    max-width: 640px;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(15, 23, 42, 0.82);
}

/* Botón real */
.reserve-button {
    display: inline-block;
    padding: 0.85rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 999px;
    color: #ffffff;
    background: linear-gradient(135deg, #1d4ed8, #22c55e);
    text-decoration: none;
    box-shadow:
        0 10px 25px rgba(37, 99, 235, 0.30),
        0 0 0 1px rgba(15, 23, 42, 0.35);
    transition: all 0.18s ease;
}

.reserve-button:hover {
    transform: translateY(-2px);
    box-shadow:
        0 14px 30px rgba(37, 99, 235, 0.38),
        0 0 0 1px rgba(15, 23, 42, 0.40);
}

.reserve-note {
    margin: 0 auto;
    max-width: 600px;
    font-size: 0.85rem;
    line-height: 1.7;
    color: rgba(75, 85, 99, 0.95);
}

/* Responsive */
@media (max-width: 640px) {
    .reserve-inner {
        padding-inline: 1.25rem;
    }

    .reserve-button {
        width: 100%;
        padding: 1rem 0;
    }
}