/* OS TigerLab — Panel de cursos (mismo estilo dark que index) */
:root {
    --bg: #0A0A0A;
    --bg-elevated: #1E1E1E;
    --card-bg: rgba(30,30,30,0.55);
    --border: rgba(245,245,245,0.08);
    --border-default: 1px solid rgba(245,245,245,0.08);
    --text: #F5F5F5;
    --text-muted: #B3B3B3;
    --accent: #00FF9C;
    --accent-sec: #00B4FF;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-pill: 999px;
    --space-4: 1rem;
    --space-8: 3rem;
    --space-12: 12px;
    --space-16: 1.5rem;
    --space-20: 1.25rem;
    --space-24: 1.5rem;
    --space-32: 2rem;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Poppins', sans-serif;
    --container-max: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; max-width: 100%; }
body { overflow-x: hidden; max-width: 100%; min-width: 0; }

.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    padding: 8px 16px;
    background: var(--accent);
    color: var(--bg);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    z-index: 9999;
    border-radius: var(--radius-sm);
    transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; outline: 2px solid var(--text); outline-offset: 2px; }
body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.panel-header {
    background: var(--bg-elevated);
    border-bottom: var(--border-default);
    padding: var(--space-16) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.panel-header .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-24);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-12);
    width: 100%;
    min-width: 0;
}
.panel-logo-link {
    display: inline-flex;
    align-items: center;
}
.panel-logo-link img,
.panel-logo-img {
    height: 36px;
    max-height: 42px;
    width: auto;
    max-width: 180px;
    display: block;
    object-fit: contain;
    object-position: left center;
}
@media (max-width: 640px) {
    .panel-logo-link img,
    .panel-logo-img {
        height: 30px;
        max-height: 34px;
        max-width: 150px;
    }
}
.panel-nav {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    flex-wrap: wrap;
}
.panel-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
}
.panel-nav a:hover { color: var(--accent); }
.panel-nav a.panel-nav--active { color: var(--accent); }

.panel-main {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-32) var(--space-24);
    width: 100%;
    min-width: 0;
}
.panel-title {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--space-12);
}
.panel-divider {
    height: 1px;
    background: var(--border);
    margin-bottom: var(--space-32);
}

.group-card {
    margin-bottom: var(--space-32);
}
.group-card:last-of-type { margin-bottom: 0; }
.group-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-sec);
    margin-bottom: var(--space-20);
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--border);
}

.course-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-24);
}
.course-card {
    min-width: 0;
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    border: var(--border-default);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}
.course-card:hover {
    border-color: rgba(245,245,245,0.15);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.course-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--bg-elevated);
    overflow: hidden;
}
.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.details-course {
    padding: var(--space-24);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.details-course h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: var(--space-12);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.details-course a {
    text-decoration: none;
    display: block;
    margin-top: auto;
}
.btn-course {
    display: block;
    width: 100%;
    padding: 12px 20px;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent);
    background: transparent;
    border: 2px solid var(--accent);
    border-radius: 50px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    text-align: center;
}
.btn-course:hover {
    background: var(--accent);
    color: var(--bg);
}

/* Curso estrella (ESPECIALIDADES): destacado con borde, badge y descripción */
.course-card--estrella {
    border-color: rgba(0,255,156,0.35);
    box-shadow: 0 2px 12px rgba(0,0,0,0.2), 0 0 0 1px rgba(0,255,156,0.15);
}
.course-card--estrella:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(0,0,0,0.25), 0 0 0 1px rgba(0,255,156,0.3);
}
.course-card-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--bg);
    background: var(--accent);
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: var(--space-8);
}
.course-card-desc {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: var(--space-16);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.btn-course--primary {
    background: var(--accent);
    color: var(--bg);
}
.btn-course--primary:hover {
    background: var(--accent-hover, #00e08a);
    color: var(--bg);
}

@media (max-width: 1100px) {
    .course-container { grid-template-columns: repeat(2, 1fr); gap: var(--space-20); }
    .details-course h4 { font-size: 1rem; }
}
@media (max-width: 640px) {
    .course-container { grid-template-columns: 1fr; gap: var(--space-20); }
    .details-course { padding: var(--space-20); }
    .details-course h4 { font-size: 1rem; }
}
@media (max-width: 500px) {
    .course-container { gap: var(--space-16); }
    .panel-main { padding: var(--space-24) var(--space-16); }
}

.panel-footer {
    margin-top: var(--space-32);
    padding: var(--space-24) var(--space-20);
    border-top: var(--border-default);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}
.panel-footer a { color: var(--accent-sec); text-decoration: none; }
.panel-footer a:hover { color: var(--accent); }

/* ========== STUDENT DASHBOARD (encapsulado .student-dashboard-*) ========== */
.student-dashboard-wrap {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-20);
    padding-bottom: var(--space-32);
    min-width: 0;
    overflow-x: hidden;
}
.student-dashboard-loading { padding: var(--space-32) 0; }
.student-dashboard-skeleton {
    background: linear-gradient(90deg, var(--bg-elevated) 25%, rgba(245,245,245,0.06) 50%, var(--bg-elevated) 75%);
    background-size: 200% 100%;
    animation: student-dashboard-shimmer 1.2s ease-in-out infinite;
    border-radius: var(--radius-sm);
}
@keyframes student-dashboard-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.student-dashboard-skeleton-header { height: 100px; min-height: 100px; margin-bottom: var(--space-24); }
.student-dashboard-skeleton-card { height: 180px; min-height: 180px; margin-bottom: var(--space-24); }
.student-dashboard-skeleton-grid { height: 320px; min-height: 320px; }

.student-dashboard-content { padding-top: var(--space-24); }

/* Tabs */
.student-dashboard-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--space-24);
    border-bottom: var(--border-default);
    padding-bottom: var(--space-16);
}
.student-dashboard-tab {
    padding: 10px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-height: 44px;
    transition: color 0.2s, background 0.2s;
}
.student-dashboard-tab:hover { color: var(--text); }
.student-dashboard-tab.active {
    color: var(--accent);
    background: rgba(0,255,156,0.08);
}
.student-dashboard-tab:focus { outline: none; }
.student-dashboard-tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.student-dashboard-tabpanel[hidden] { display: none !important; }

/* Onboarding (sin compras) */
.student-dashboard-onboarding {
    background: var(--card-bg);
    border: var(--border-default);
    border-radius: var(--radius);
    padding: var(--space-24);
    margin-bottom: var(--space-32);
}
.student-dashboard-onboarding-text {
    font-size: 1.125rem;
    color: var(--text);
    margin-bottom: var(--space-16);
}
.student-dashboard-onboarding .student-dashboard-btn-catalog { display: inline-flex; }

/* Post-compra: "¡Listo! Ya tenés acceso" + Empezar curso + Foro */
.student-dashboard-post-purchase {
    margin-bottom: var(--space-32);
    padding: var(--space-24);
    background: rgba(0,255,156,0.08);
    border: 1px solid rgba(0,255,156,0.2);
    border-radius: var(--radius);
}
.student-dashboard-post-purchase-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-8);
}
.student-dashboard-post-purchase-text {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin-bottom: var(--space-20);
    line-height: 1.5;
}
.student-dashboard-post-purchase-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-12);
    align-items: center;
}
.student-dashboard-btn-start {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border-radius: 50px;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
}
.student-dashboard-btn-start:hover { background: #00e68a; }
.student-dashboard-btn-start:focus-visible { outline: 2px solid var(--accent-sec); outline-offset: 2px; }
.student-dashboard-btn-forum {
    display: inline-flex;
    align-items: center;
    min-height: 48px;
    padding: 12px 20px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--accent);
    background: transparent;
    border: 2px solid var(--accent);
    border-radius: 50px;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
}
.student-dashboard-btn-forum:hover { background: var(--accent); color: var(--bg); }
.student-dashboard-btn-forum:focus-visible { outline: 2px solid var(--accent-sec); outline-offset: 2px; }

@media (max-width: 480px) {
    .student-dashboard-post-purchase { padding: var(--space-16); }
    .student-dashboard-post-purchase-actions { flex-direction: column; }
    .student-dashboard-btn-start,
    .student-dashboard-btn-forum { width: 100%; justify-content: center; min-height: 48px; }
}

/* Upsell (complementos recomendados) */
.student-dashboard-upsell-wrap { margin-top: var(--space-24); padding-top: var(--space-24); border-top: var(--border-default); }
.student-dashboard-upsell-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--space-16);
}
.student-dashboard-upsell-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-20);
}

/* Catálogo dentro del panel */
.student-dashboard-catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-24);
    min-height: 100px;
}

/* Toast */
.student-dashboard-toast {
    position: fixed;
    bottom: var(--space-24);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 14px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
}
.student-dashboard-toast.is-visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.student-dashboard-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-16);
    padding: var(--space-24) 0;
    border-bottom: var(--border-default);
    margin-bottom: var(--space-32);
}
.student-dashboard-avatar {
    width: 56px;
    height: 56px;
    min-width: 56px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--bg);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.student-dashboard-user-info { flex: 1; min-width: 0; }
.student-dashboard-user-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}
.student-dashboard-user-email {
    font-size: 0.875rem;
    color: var(--text-muted);
    word-break: break-all;
}
.student-dashboard-badge {
    display: inline-block;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    background: rgba(0,255,156,0.12);
    color: var(--accent);
    margin-top: 8px;
}
.student-dashboard-header-actions { display: flex; align-items: center; gap: var(--space-12); }
.student-dashboard-btn-catalog {
    padding: 10px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent);
    background: transparent;
    border: 2px solid var(--accent);
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    transition: background 0.2s ease, color 0.2s ease;
}
.student-dashboard-btn-catalog:hover { background: var(--accent); color: var(--bg); }
.student-dashboard-btn-catalog:focus { outline: none; }
.student-dashboard-btn-catalog:focus-visible { outline: 2px solid var(--accent-sec); outline-offset: 2px; }

.student-dashboard-section { margin-bottom: var(--space-32); }
.student-dashboard-section-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-16);
}
.student-dashboard-microcopy {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-20);
    max-width: 36rem;
}

/* Continuar aprendiendo — card grande */
.student-dashboard-continue-card {
    background: var(--card-bg);
    border: var(--border-default);
    border-radius: var(--radius);
    padding: var(--space-24);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-24);
    align-items: center;
    min-height: 140px;
}
.student-dashboard-continue-card.empty { display: flex; align-items: center; justify-content: center; color: var(--text-muted); }
.student-dashboard-continue-title { font-family: var(--font-heading); font-size: 1.125rem; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.student-dashboard-continue-meta { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 8px; }
.student-dashboard-progress-bar {
    height: 8px;
    background: var(--bg-elevated);
    border-radius: var(--radius-pill);
    overflow: hidden;
    max-width: 200px;
    margin-top: 8px;
}
.student-dashboard-progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: var(--radius-pill);
    transition: width 0.3s ease;
}
.student-dashboard-continue-actions { display: flex; flex-direction: column; gap: 8px; }
.student-dashboard-btn-continue {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    transition: background 0.2s ease;
}
.student-dashboard-btn-continue:hover { background: #00e08a; }
.student-dashboard-btn-continue:focus { outline: none; }
.student-dashboard-btn-continue:focus-visible { outline: 2px solid var(--accent-sec); outline-offset: 2px; }

/* Filtros y búsqueda */
.student-dashboard-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-12);
    margin-bottom: var(--space-20);
    align-items: center;
}
.student-dashboard-search {
    flex: 1;
    min-width: 180px;
    max-width: 280px;
    padding: 10px 16px;
    font-size: 0.9375rem;
    border: var(--border-default);
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    color: var(--text);
    min-height: 44px;
}
.student-dashboard-search::placeholder { color: var(--text-muted); }
.student-dashboard-search:focus { outline: none; border-color: var(--accent); }
.student-dashboard-filter-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.student-dashboard-filter-btn {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: var(--border-default);
    border-radius: var(--radius-pill);
    cursor: pointer;
    min-height: 44px;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.student-dashboard-filter-btn:hover { color: var(--text); border-color: var(--border-strong); }
.student-dashboard-filter-btn.active { color: var(--accent); border-color: var(--accent); background: rgba(0,255,156,0.08); }
.student-dashboard-filter-btn:focus { outline: none; }
.student-dashboard-filter-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Grid mis cursos */
.student-dashboard-mycourses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-24);
    min-height: 120px;
}
.student-dashboard-card {
    background: var(--card-bg);
    border: var(--border-default);
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.student-dashboard-card:hover { border-color: rgba(245,245,245,0.15); box-shadow: 0 4px 16px rgba(0,0,0,0.2); }
.student-dashboard-card-title {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text);
    padding: var(--space-20);
    padding-bottom: 8px;
    line-height: 1.35;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.student-dashboard-card-meta { font-size: 0.875rem; color: var(--text-muted); padding: 0 var(--space-20); margin-bottom: var(--space-12); }
.student-dashboard-card-actions { padding: var(--space-20); padding-top: 0; margin-top: auto; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.student-dashboard-card--with-image { padding: 0; }
.student-dashboard-card-image-link { display: block; line-height: 0; background: rgba(0,0,0,0.2); }
.student-dashboard-card-img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; vertical-align: middle; }
.student-dashboard-card--with-image .student-dashboard-card-body { padding: var(--space-20) var(--space-24) var(--space-24); display: flex; flex-direction: column; flex: 1; min-height: 0; }
.student-dashboard-card--with-image .student-dashboard-card-title { padding: 0 0 8px; font-size: 1.0625rem; }
.student-dashboard-card--with-image .student-dashboard-card-meta { padding: 0; margin-bottom: var(--space-12); }
.student-dashboard-card--with-image .student-dashboard-card-actions { padding: 0; }
.student-dashboard-card-actions .student-dashboard-btn-continue { min-height: 44px; padding: 10px 18px; font-size: 0.9375rem; }
.student-dashboard-btn-outline {
    padding: 10px 18px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent-sec);
    background: transparent;
    border: 2px solid var(--accent-sec);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    transition: background 0.2s, color 0.2s;
}
.student-dashboard-btn-outline:hover { background: rgba(0,180,255,0.1); }
.student-dashboard-btn-outline:focus { outline: none; }
.student-dashboard-btn-outline:focus-visible { outline: 2px solid var(--accent-sec); outline-offset: 2px; }

/* Recomendado — cards compactas pero legibles */
.student-dashboard-recommended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-20);
    min-height: 80px;
}
.student-dashboard-rec-card {
    background: var(--card-bg);
    border: var(--border-default);
    border-radius: var(--radius-sm);
    padding: var(--space-20);
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: border-color 0.2s;
}
.student-dashboard-rec-card:hover { border-color: rgba(245,245,245,0.12); }
.student-dashboard-rec-card-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    line-height: 1.35;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.student-dashboard-rec-card-cta { margin-top: auto; padding-top: 12px; }
.student-dashboard-rec-card-cta a {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
}
.student-dashboard-rec-card-cta a:hover { text-decoration: underline; }
.student-dashboard-rec-card-cta a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

/* Actividad */
.student-dashboard-activity-list { list-style: none; padding: 0; margin: 0; }
.student-dashboard-activity-list li {
    padding: var(--space-12) 0;
    border-bottom: var(--border-default);
    font-size: 0.9375rem;
    color: var(--text-muted);
}
.student-dashboard-activity-list li:last-child { border-bottom: none; }

.student-dashboard-empty { font-size: 0.9375rem; color: var(--text-muted); }
.student-dashboard-empty a { color: var(--accent-sec); text-decoration: none; }
.student-dashboard-empty a:hover { text-decoration: underline; }

.student-dashboard-error {
    padding: var(--space-24);
    background: rgba(255,68,68,0.08);
    border: 1px solid rgba(255,68,68,0.3);
    border-radius: var(--radius-sm);
    color: #ff6b6b;
    font-size: 0.9375rem;
    margin: var(--space-24) 0;
}

@media (max-width: 900px) {
    .student-dashboard-mycourses-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-20); }
    .student-dashboard-catalog-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-20); }
}
@media (max-width: 768px) {
    .student-dashboard-continue-card { grid-template-columns: 1fr; }
    .student-dashboard-continue-actions { flex-direction: row; }
    .student-dashboard-header { flex-direction: column; align-items: flex-start; }
    .student-dashboard-mycourses-grid { grid-template-columns: 1fr; gap: var(--space-20); }
    .student-dashboard-catalog-grid { grid-template-columns: 1fr; gap: var(--space-20); }
    .student-dashboard-recommended-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-16); }
    .student-dashboard-card--with-image .student-dashboard-card-body { padding: var(--space-16) var(--space-20) var(--space-20); }
    .student-dashboard-card-title { padding: var(--space-16); padding-bottom: 8px; font-size: 1rem; }
    .student-dashboard-card-meta { padding: 0 var(--space-16); }
    .student-dashboard-card-actions { padding: var(--space-16); padding-top: 0; }
}
@media (max-width: 480px) {
    .student-dashboard-recommended-grid { grid-template-columns: 1fr; }
    .student-dashboard-filters { flex-direction: column; align-items: stretch; }
    .student-dashboard-search { max-width: none; }
}
@media (max-width: 360px) {
    .student-dashboard-wrap { padding-left: var(--space-12); padding-right: var(--space-12); }
    .student-dashboard-tabs { gap: 4px; }
    .student-dashboard-tab { padding: 8px 12px; font-size: 0.875rem; }
    .student-dashboard-card-actions { flex-direction: column; }
    .student-dashboard-card-actions .student-dashboard-btn-continue,
    .student-dashboard-card-actions .student-dashboard-btn-outline { width: 100%; justify-content: center; }
}

/* Sticky CTA móvil (opcional) */
.student-dashboard-sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 90;
    padding: 14px 20px;
    padding-bottom: calc(14px + env(safe-area-inset-bottom, 0));
    background: var(--accent);
    color: var(--bg);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    display: none;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
    transition: transform 0.2s ease;
}
.student-dashboard-sticky-cta:hover { color: var(--bg); opacity: 0.95; }
.student-dashboard-sticky-cta:focus { outline: none; }
.student-dashboard-sticky-cta:focus-visible { outline: 2px solid var(--bg); outline-offset: 2px; }
@media (max-width: 768px) {
    .student-dashboard-wrap { padding-bottom: 80px; }
    .student-dashboard-sticky-cta { display: none; }
    .student-dashboard-sticky-cta.is-visible { display: block; }
}