/* ============================================================
   Biblioteca Digital CUNOC – Trabajo Social
   style.css – Estilo corporativo serio, tipografía Merriweather y Escala de Grises
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,900;1,300;1,400;1,700;1,900&display=swap');

:root {
    --usac-blue: #1F2937;
    --usac-blue-dark: #111827;
    --usac-gold: #4B5563;
    --accent: #374151;
    --bronze: #4B5563;
    --bronze-light: #9CA3AF;
    --white: #FFFFFF;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .06);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, .05);
    --shadow-lg: 0 6px 16px rgba(0, 0, 0, .08);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Bloqueo de selección al arrastrar mouse en pantallas animadas */
#welcome-screen,
#welcome-screen *,
.hero-section,
.hero-section *,
.hero-content,
.hero-content * {
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================================
   TIPOGRAFÍA GLOBAL SERIA E INSTITUCIONAL (MERRIWEATHER)
   ============================================================ */
body {
    font-family: 'Merriweather', Georgia, 'Times New Roman', serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

html {
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6,
.header-title,
.welcome-container h1,
.institutional-hero h1,
.accordion-btn,
.dropbtn {
    font-family: 'Merriweather', Georgia, 'Times New Roman', serif;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* ============================================================
   MODO OSCURO SOBRIO Y DE ALTO CONTRASTE (CORREGIDO - GRIS)
   ============================================================ */
body.dark {
    --gray-100: #111827;
    /* Fondo completo – Deep gray-900 */
    --gray-200: #1F2937;
    /* Fondo de tarjetas/modales – gray-800 */
    --gray-300: #374151;
    /* Borde y hover – gray-700 */
    --gray-400: #4B5563;
    /* Borde secundario – gray-600 */
    --gray-500: #9CA3AF;
    --gray-600: #D1D5DB;
    --gray-700: #E5E7EB;
    /* Texto secundario */
    --gray-800: #2D3748;
    /* Fondo de tarjetas/modales - ligeramente más claro */
    --gray-900: #F9FAFB;
    /* Texto primario - gray-50 */
    --white: #FFFFFF;
    --usac-blue: #E0F2FE;
    /* Azul claro para modo oscuro */
    --usac-blue-dark: #F3F4F6;
    --usac-gold: #FCD34D;
    --accent: #F3F4F6;

    background: var(--gray-100) !important;
    color: var(--gray-900) !important;
}

body.dark .theme-card,
body.dark .section-card,
body.dark .objective-card,
body.dark .function-card,
body.dark .announcement-card,
body.dark .doc-card,
body.dark .message-card,
body.dark .modal-box,
body.dark .admin-container,
body.dark .form-section,
body.dark .list-section,
body.dark .about-section,
body.dark .contribution-forms form,
body.dark .messages-history,
body.dark .tab-btn,
body.dark .btn-small,
body.dark .premium-input,
body.dark .accordion-btn,
body.dark .social-links-section {
    background-color: var(--gray-800) !important;
    color: var(--gray-900) !important;
    border-color: var(--gray-400) !important;
}

/* Ajustes adicionales de tema oscuro para header, footer, imágenes y modales */
body.dark img {
    filter: brightness(0.8) contrast(1.15);
}

body.dark .modal-backdrop {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
}

body.dark #app-header {
    background: var(--gray-800) !important;
    border-bottom: 3px solid var(--usac-blue);
}

body.dark #app-footer {
    background: var(--gray-100) !important;
    border-top: 1px solid var(--gray-400);
}

body.dark .dropdown-content {
    background: var(--gray-800) !important;
    border-color: var(--gray-400);
}

body.dark .dropdown-content a {
    color: var(--gray-900) !important;
    border-bottom-color: var(--gray-400);
}

body.dark .dropdown-content a:hover {
    background: var(--gray-300) !important;
    color: var(--usac-gold) !important;
}

.hidden {
    display: none !important;
}

/* ============================================================
   PANTALLA DE BIENVENIDA (Estilos principales al final del archivo)
   ============================================================ */


/* ============================================================
   MODALES Y FORMULARIOS
   ============================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .7);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 10000;
    animation: fadeIn .3s ease;
}

.modal-box {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn .3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--gray-200);
}

.modal-header h2 {
    color: var(--usac-blue);
    font-size: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
    line-height: 1;
}

.close-btn:hover {
    color: var(--usac-blue);
}

.auth-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    padding: .75rem;
    border: 2px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-family: inherit;
}

.tab-btn.active {
    background: var(--usac-blue);
    color: var(--white);
    border-color: var(--usac-blue);
}

.auth-gif {
    width: 100%;
    max-width: 250px;
    margin: 0 auto 1.5rem;
    display: block;
    border-radius: var(--radius-md);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: .9rem;
}

.premium-input {
    width: 100%;
    padding: .75rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
    font-family: inherit;
}

.premium-input:focus {
    outline: none;
    border-color: var(--bronze);
    box-shadow: 0 0 0 3px rgba(205, 127, 50, .1);
}

textarea.premium-input {
    resize: vertical;
    min-height: 80px;
}

/* ============================================================
   BOTONES
   ============================================================ */
.btn-bronze {
    background: var(--usac-blue);
    color: #FFFFFF;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: inherit;
}

.btn-bronze:hover {
    background: var(--usac-blue-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-blue {
    background: var(--usac-blue);
    color: var(--white);
    border: none;
    padding: .75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-blue:hover {
    background: var(--usac-blue-dark);
    transform: translateY(-1px);
}

.btn-blue:disabled {
    opacity: .6;
    cursor: not-allowed;
    transform: none;
}

.btn-small {
    background: var(--gray-200);
    color: var(--gray-800);
    border: 1px solid var(--gray-300);
    padding: .5rem 1rem;
    font-size: .9rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-small:hover {
    background: var(--usac-blue);
    color: var(--white);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: .5rem;
    transition: var(--transition);
}

.btn-drive,
.btn-drive-large {
    display: inline-block;
    background: #4285F4;
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
}

.btn-drive {
    margin-top: .5rem;
    padding: .5rem 1rem;
    font-size: .85rem;
}

.btn-drive-large {
    margin-top: 1rem;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: bold;
    box-shadow: var(--shadow-md);
}

.btn-drive:hover,
.btn-drive-large:hover {
    background: #3367D6;
    transform: translateY(-2px);
}

/* ============================================================
   HEADER Y NAVEGACIÓN DROPDOWN
   ============================================================ */
#app-header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid var(--usac-blue);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 1rem;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    min-width: 0;
}

.header-logos {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.logo-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.logo-btn:focus-visible {
    outline: 2px solid var(--usac-gold, #C5A059);
    outline-offset: 2px;
}

.mobile-menu-btn {
    display: none;
    flex-shrink: 0;
}

.header-logo {
    height: 45px;
    width: auto;
    cursor: pointer;
    transition: transform .2s ease;
}

.header-logo:hover,
.logo-btn:hover .header-logo,
.logo-btn:focus-visible .header-logo {
    transform: scale(1.1);
}

img[src*="si.jpg"].header-logo {
    width: 45px !important;
    height: 45px !important;
    border-radius: 50%;
    object-fit: cover;
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.header-title {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--usac-blue);
}

.main-nav {
    display: flex;
    gap: .5rem;
    align-items: center;
}

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    background: none;
    border: 1px solid var(--gray-300);
    padding: .5rem 1.1rem;
    font-size: .95rem;
    cursor: pointer;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-family: inherit;
    font-weight: 600;
}

.dropbtn:hover {
    background: var(--usac-blue);
    color: var(--white);
    border-color: var(--usac-blue);
}

.dropdown-content {
    display: none;
    position: absolute;
    background: var(--white);
    min-width: 210px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    border-radius: var(--radius-md);
    overflow: hidden;
    top: calc(100% + 4px);
    left: 0;
    border: 1px solid var(--gray-200);
}

.dropdown-content a {
    color: var(--gray-800);
    padding: 12px 18px;
    text-decoration: none;
    display: block;
    font-size: .95rem;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-200);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background: var(--gray-100);
    color: var(--usac-blue);
    padding-left: 24px;
}

.dropdown:hover .dropdown-content,
.dropdown-content.open {
    display: block;
    animation: fadeIn .2s ease;
}

.header-actions {
    display: flex;
    gap: .5rem;
    align-items: center;
}

/* ============================================================
   VISTAS PRINCIPALES
   ============================================================ */
#public-view {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.main-view {
    animation: fadeIn .5s ease;
}

.theme-section,
.theme-card,
.section-card,
.objective-card,
.function-card,
.announcement-card,
.doc-card,
.message-card,
.about-section,
.form-section,
.list-section,
.contribution-forms form,
.messages-history {
    transition: var(--transition);
}

/* ============================================================
   VISTAS INSTITUCIONALES (AETSRO / CONSEJO)
   ============================================================ */
.institutional-hero {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 8rem 3rem;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--usac-blue), var(--gray-600));
    color: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}

.institutional-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 3px 8px rgba(0, 0, 0, 0.7);
    letter-spacing: 0.02em;
}

.institutional-hero p {
    font-size: 1.5rem;
    font-weight: 500;
    opacity: .95;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.6);
}

.consejo-hero {
    background: linear-gradient(135deg, var(--gray-700), var(--gray-900));
}

.institutional-content {
    display: grid;
    gap: 1.5rem;
}

/* ============================================================
   PANEL ADMIN (hermano de main, fuera del flujo normal)
   ============================================================ */
#admin-panel {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Glass panel background */
.admin-container {
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 44, 95, 0.18), 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-top: 4px solid var(--bronze);
}

.admin-container h2 {
    color: var(--usac-blue);
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* ============================================================
   ADMIN DASHBOARD TABS
   ============================================================ */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.admin-header h2 {
    margin-bottom: 0 !important;
}

.admin-tabs-nav {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(10px) saturate(160%);
    -webkit-backdrop-filter: blur(10px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 2px 12px rgba(0, 44, 95, 0.08);
    scrollbar-width: thin;
    scrollbar-color: var(--usac-blue) transparent;
}

.admin-tabs-nav::-webkit-scrollbar {
    height: 4px;
}
.admin-tabs-nav::-webkit-scrollbar-thumb {
    background-color: var(--usac-blue);
    border-radius: 4px;
}

.admin-tab-btn {
    background: rgba(255, 255, 255, 0.6);
    color: var(--gray-700);
    border: 1px solid rgba(0, 44, 95, 0.15);
    padding: 0.65rem 1.4rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: 0.02em;
    transition: all 0.25s ease;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.admin-tab-btn:hover {
    background: rgba(0, 44, 95, 0.1);
    color: var(--usac-blue);
    border-color: rgba(0, 44, 95, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,44,95,0.12);
}

.admin-tab-btn.active {
    background: var(--usac-blue);
    color: var(--white);
    border-color: var(--usac-blue);
    box-shadow: 0 4px 16px rgba(0, 44, 95, 0.35);
    transform: translateY(-1px);
}

body.dark .admin-header { border-bottom-color: var(--gray-300); }
body.dark .admin-container {
    background: rgba(18, 28, 48, 0.6);
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
body.dark .admin-tabs-nav {
    background: rgba(18, 28, 48, 0.5);
    border-color: rgba(255,255,255,0.12);
}
body.dark .admin-tab-btn {
    background: rgba(255,255,255,0.07);
    color: var(--gray-400);
    border-color: rgba(255,255,255,0.12);
}
body.dark .admin-tab-btn:hover {
    background: rgba(255,255,255,0.14);
    color: var(--usac-gold);
    border-color: rgba(255,255,255,0.25);
}
body.dark .admin-tab-btn.active {
    background: var(--usac-blue);
    color: var(--white);
    border-color: var(--usac-blue);
}

.admin-tab-content {
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--usac-blue);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 3px solid var(--bronze);
}

.stat-card h3 {
    font-size: 1rem;
    margin-bottom: .5rem;
    opacity: .9;
}

.stat-card p {
    font-size: 2.5rem;
    font-weight: bold;
}

.admin-forms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.admin-lists {
    display: grid;
    gap: 2rem;
}

.form-section {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-section h3 {
    color: var(--usac-blue);
    margin-bottom: .5rem;
}

.list-section {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.list-section h3 {
    color: var(--usac-blue);
    margin-bottom: 1rem;
}

/* ============================================================
   BIBLIOTECA INICIO — LAYOUT VERTICAL HISTORIA
   ============================================================ */
.hero-section {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 6rem 3rem;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--daily-hero-bg, linear-gradient(135deg, #050508 0%, #0d1b2a 25%, #1b263b 50%, #004e92 75%, #050508 100%));
    background-size: 300% 300%;
    animation: heroKnowledgeGradient 10s ease-in-out infinite;
    color: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    border: 1px solid rgba(0, 242, 254, 0.25);
    box-shadow: 
        0 20px 45px rgba(0, 44, 95, 0.35),
        0 0 35px rgba(0, 242, 254, 0.12),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.hero-section *,
.hero-content * {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Destello pulsante de luz de conocimiento y aprendizaje */
.hero-section::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.18) 0%, rgba(147, 51, 234, 0.12) 35%, transparent 70%);
    animation: heroKnowledgePulse 7s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 2;
}

/* Borde animado brillante en la caja hero */
.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: linear-gradient(120deg, #00f2fe, #4facfe, #9b51e0, #f5a623, #00f2fe);
    background-size: 300% 300%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: heroAuraFlow 6s ease-in-out infinite;
    pointer-events: none;
    z-index: 3;
    opacity: 0.85;
}

@keyframes heroKnowledgeGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes heroKnowledgePulse {
    0% { transform: scale(0.85) rotate(0deg); opacity: 0.5; }
    100% { transform: scale(1.25) rotate(20deg); opacity: 0.95; }
}

@keyframes heroAuraFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.hero-gif {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.35;
    transition: opacity 0.5s ease;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 44, 95, 0.45), rgba(17, 24, 39, 0.65));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 3;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 3px 8px rgba(0, 0, 0, 0.7);
    letter-spacing: 0.02em;
}

.hero-section p {
    font-size: 1.5rem;
    font-weight: 500;
    opacity: .95;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.6);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.section-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.section-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.section-card h3 {
    color: var(--usac-blue);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.objective-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    border-left: 4px solid var(--bronze);
}

.objective-card h4 {
    color: var(--usac-blue);
    margin-bottom: .5rem;
}

.about-section {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.about-section h2 {
    color: var(--usac-blue);
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

/* Layout vertical para historia */
.about-content-vertical {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.about-block {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--usac-blue);
}

.about-block h3 {
    color: var(--bronze);
    margin-bottom: .5rem;
}

.about-seal {
    width: min(140px, 45vw);
    height: auto;
    display: block;
    margin: 0 0 1rem;
}

/* ============================================================
   CURSOS E IA
   ============================================================ */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.functions-header {
    text-align: center;
    padding: 2rem 1rem;
    margin-bottom: 2rem;
}

.functions-header h2 {
    color: var(--usac-blue);
    font-size: 2rem;
    margin-bottom: .5rem;
}

.function-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.function-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.function-card h3 {
    color: var(--usac-blue);
    margin-bottom: .75rem;
}

/* ============================================================
   PLATAFORMA GENERAL
   ============================================================ */
.search-section {
    margin-bottom: 2rem;
}

.search-input {
    max-width: 600px;
    margin: 0 auto;
    display: block;
    font-size: 1.1rem;
    padding: 1rem 1.5rem;
}

.news-section,
.repo-section,
.drive-section,
.student-contribution,
.communication-section {
    margin-bottom: 3rem;
}

.news-section h2,
.repo-section h2,
.drive-section h2,
.student-contribution h2,
.communication-section h2 {
    color: var(--usac-blue);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: .5rem;
}

#announcements-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    align-items: start;
}

/* Responsive adjustments for announcements list */
@media screen and (max-width: 768px) {
  #announcements-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media screen and (max-width: 480px) {
  #announcements-list {
    grid-template-columns: 1fr;
  }
}

#messages-list {
    display: grid;
    gap: 1rem;
}

.announcement-card {
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--bronze);
    border-left: none;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.announcement-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 44, 95, .14);
}

.announcement-card.urgent {
    border-top-color: #E53E3E;
}

/* Imagen de la tarjeta — ocupa todo el ancho superior */
.announcement-card .ann-card-img {
    width: 100% !important;
    max-width: 100% !important;
    max-height: 160px !important;
    height: 160px !important;
    object-fit: cover !important;
    border-radius: 0 !important;
    margin: 0 !important;
    display: block !important;
    flex-shrink: 0;
}

/* Cuerpo de texto de la tarjeta */
.announcement-card .ann-body {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: .35rem;
}

.announcement-card h3 {
    color: var(--usac-blue);
    margin-bottom: .25rem;
    font-size: .95rem;
    line-height: 1.3;
    display: -webkit-box;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.announcement-card p {
    font-size: .85rem;
    color: var(--gray-600);
    line-height: 1.45;
    display: -webkit-box;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.ann-meta {
    font-size: .75rem;
    color: var(--gray-400);
    margin-top: auto;
    padding-top: .4rem;
    border-top: 1px solid var(--gray-200);
}

/* Responsive: 2 columnas en tablet */
@media (max-width: 1024px) {
    #announcements-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Responsive: 1 columna en móvil */
@media (max-width: 600px) {
    #announcements-list {
        grid-template-columns: 1fr;
    }
}


.doc-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.doc-card h3 {
    color: var(--usac-blue);
    margin-bottom: .25rem;
}

.doc-meta {
    font-size: .9rem;
    color: var(--gray-600);
}

.contribution-forms {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contribution-forms form {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: .75rem;
}

.contribution-forms form h3 {
    color: var(--usac-blue);
    margin-bottom: .25rem;
}

.messages-history {
    margin-top: 2rem;
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.message-card {
    background: var(--gray-100);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--bronze);
    margin-bottom: .75rem;
}

/* ============================================================
   ICONOS SOCIALES PROFESIONALES (FontAwesome)
   ============================================================ */
.social-icons-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-top: .75rem;
}

/* Icono en secciones de vistas (AETSRO / Consejo) */
.social-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--usac-blue);
    color: var(--white);
    font-size: 1.25rem;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.social-icon-link:hover {
    background: var(--bronze);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* Variante bordó para Consejo */
.social-icon-link.consejo-icon {
    background: #8B0000;
}

.social-icon-link.consejo-icon:hover {
    background: var(--bronze);
}

/* ============================================================
   AETSRO Y CONSEJO — ACORDEONES Y GALERÍA
   ============================================================ */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--gray-200);
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.gallery-item.img-error {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-200);
    min-height: 140px;
}

.gallery-item.img-error::before {
    content: '\f03e';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 2.5rem;
    color: var(--gray-400);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, .65));
    color: #fff;
    font-size: .8rem;
    font-weight: 600;
    padding: .75rem .6rem .4rem;
    text-align: center;
}

/* ── PDF Section ────────────────────────────────────────── */
.pdf-list-container {
    display: flex;
    flex-direction: column;
    gap: .6rem;
}

.pdf-loading {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
    font-size: .95rem;
}

.pdf-loading i {
    margin-right: .4rem;
    color: var(--usac-blue);
}

.pdf-empty {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--gray-400);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .6rem;
    font-size: .9rem;
}

.pdf-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .85rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-200);
    background: var(--white);
    text-decoration: none;
    color: inherit;
    transition: background .2s, border-color .2s, box-shadow .2s;
}

.pdf-card:hover {
    background: #f0f4ff;
    border-color: var(--usac-blue);
    box-shadow: 0 4px 12px rgba(0, 44, 95, .1);
}

.pdf-icon {
    font-size: 1.6rem;
    color: #e53e3e;
    flex-shrink: 0;
    width: 2.2rem;
    text-align: center;
}

.pdf-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: .15rem;
}

.pdf-name {
    font-weight: 600;
    font-size: .95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: capitalize;
}

.pdf-size {
    font-size: .78rem;
    color: var(--gray-500);
}

.pdf-action {
    color: var(--usac-blue);
    font-size: .9rem;
    flex-shrink: 0;
}

/* Dark mode for PDFs */
body.dark .pdf-card {
    background: rgba(255, 255, 255, .05);
    border-color: rgba(255, 255, 255, .1);
    color: var(--white);
}

body.dark .pdf-card:hover {
    background: rgba(255, 255, 255, .1);
    border-color: var(--usac-gold);
}

body.dark .pdf-size {
    color: var(--gray-400);
}


.accordion-container {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    margin-top: 1rem;
}

.accordion-btn {
    background: var(--usac-blue);
    color: var(--white);
    border: none;
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 1.05rem;
    font-weight: bold;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
}

.accordion-btn:hover {
    background: var(--usac-blue-dark);
}

.consejo-acc-btn {
    background: #8B0000;
}

.consejo-acc-btn:hover {
    background: #600000;
}

.accordion-content {
    padding: 0 .5rem;
    animation: fadeIn .3s ease;
}

.consejo-gallery-section {
    padding: 2rem;
}

.consejo-gallery-header {
    margin-bottom: 1.25rem;
    text-align: center;
}

.consejo-gallery-header h3 {
    color: var(--usac-blue);
    margin-bottom: 0.35rem;
}

.consejo-gallery-header p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

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

.consejo-gallery-item {
    background: var(--gray-100);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.consejo-gallery-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.consejo-gallery-item figcaption {
    padding: 0.75rem 0.9rem;
    font-size: 0.95rem;
    color: var(--gray-700);
    text-align: center;
    font-weight: 600;
}

.social-links-section {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.social-links-section h3 {
    color: var(--usac-blue);
    margin-bottom: 1rem;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    color: var(--usac-blue);
    text-decoration: none;
    padding: .5rem 1rem;
    border: 1px solid var(--usac-blue);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: .95rem;
}

.social-link:hover {
    background: var(--usac-blue);
    color: var(--white);
}

/* ============================================================
   FOOTER
   ============================================================ */
#app-footer {
    background: var(--usac-blue);
    color: var(--white);
    padding: 2.5rem 2rem;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.footer-img {
    height: 50px;
    width: auto;
}

.footer-copy {
    opacity: .75;
    font-size: .85rem;
}

/* Iconos de footer (más grandes que los de sección) */
#app-footer .social-icons-row {
    gap: 1rem;
}

#app-footer .social-icon-link {
    width: 44px;
    height: 44px;
    font-size: 1.15rem;
    background: rgba(255, 255, 255, .15);
    border: 1px solid rgba(255, 255, 255, .25);
}

#app-footer .social-icon-link:hover {
    background: var(--bronze);
    border-color: var(--bronze);
    transform: translateY(-3px);
}


/* ============================================================
   REDES SOCIALES – Formulario Admin y Footer dinámico
   ============================================================ */

/* Panel admin: sección redes sociales */
.form-section--social {
    border-top: 2px solid var(--usac-blue);
}

.form-section--social h3 {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.form-hint {
    font-size: .82rem;
    color: var(--text-muted, #6b7280);
    margin: -.25rem 0 .75rem;
}

.social-input-row {
    display: grid;
    grid-template-columns: 140px 1fr;
    align-items: center;
    gap: .6rem;
    margin-bottom: .55rem;
}

.social-label {
    display: flex;
    align-items: center;
    gap: .45rem;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-secondary, #4b5563);
}

/* Brand colors para iconos en el formulario */
.social-ico {
    font-size: 1rem;
    width: 1.1em;
    text-align: center;
}

.facebook-ico {
    color: #1877f2;
}

.x-ico {
    color: #000;
}

.instagram-ico {
    color: #e1306c;
}

.linkedin-ico {
    color: #0a66c2;
}

.youtube-ico {
    color: #ff0000;
}

/* Footer: contenedor de iconos dinámicos */
.footer-social {
    display: flex;
    justify-content: center;
    gap: .8rem;
    flex-wrap: wrap;
}

.footer-social-empty {
    font-size: .8rem;
    opacity: .5;
    font-style: italic;
    color: var(--white);
}

/* Base icon pill en el footer */
.social-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .22);
    color: #fff;
    font-size: 1.1rem;
    text-decoration: none;
    transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.social-icon-link:hover {
    transform: translateY(-4px);
}

/* Brand-color hover per network */
.social-icon-link.facebook-ico:hover {
    background: #1877f2;
    border-color: #1877f2;
}

.social-icon-link.x-ico:hover {
    background: #14171a;
    border-color: #14171a;
}

.social-icon-link.instagram-ico:hover {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    border-color: #e6683c;
}

.social-icon-link.linkedin-ico:hover {
    background: #0a66c2;
    border-color: #0a66c2;
}

.social-icon-link.youtube-ico:hover {
    background: #ff0000;
    border-color: #ff0000;
}

/* ============================================================
   ANIMACIONES
   ============================================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem 1rem;
        gap: 0;
    }

    .header-top-row {
        width: 100%;
    }

    .mobile-menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
    }

    .logo-section {
        flex: 1;
        gap: 0.5rem;
    }

    .header-title {
        font-size: 1rem;
        line-height: 1.3;
    }

    .header-logo {
        height: 36px;
    }

    img[src*="si.jpg"].header-logo {
        width: 36px !important;
        height: 36px !important;
    }

    .main-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
        padding: 0.75rem 0 0.25rem;
        order: 3;
    }

    #app-header.nav-open .main-nav {
        display: flex;
    }

    .dropdown {
        width: 100%;
    }

    .dropbtn {
        width: 100%;
        text-align: left;
    }

    .dropdown-content {
        position: static;
        display: none;
        width: 100%;
        box-shadow: none;
        border: 1px solid var(--gray-200);
        margin-top: 0.25rem;
    }

    .dropdown-content.open {
        display: block;
    }

    .dropdown:hover .dropdown-content {
        display: none;
    }

    .dropdown-content.open {
        display: block !important;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
        padding-top: 0.5rem;
        order: 4;
    }

    #public-view,
    #admin-panel {
        padding: 0.75rem;
    }

    .welcome-container h1 {
        font-size: 1.6rem;
    }

    .welcome-container {
        padding: 1.25rem;
    }

    .btn-bronze {
        width: min(100%, 320px);
    }

    .modal-box {
        width: min(95%, 100%);
        padding: 1.25rem;
        max-height: 85vh;
    }

    .hero-section,
    .institutional-hero {
        padding: 4rem 1.25rem;
        min-height: 260px;
    }

    .hero-section h1,
    .institutional-hero h1 {
        font-size: 1.5rem;
    }

    .hero-section p,
    .institutional-hero p {
        font-size: 1rem;
    }

    .stats-grid,
    .admin-forms,
    .cards-grid,
    .objectives-grid,
    .courses-grid {
        grid-template-columns: 1fr;
    }

    .social-input-row {
        grid-template-columns: 1fr;
        gap: 0.35rem;
    }

    #plataformas-globales,
    #otros-recursos {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
    }

    .category-title {
        font-size: 1.15rem;
        margin: 2rem 0 1rem;
    }

    .edu-grid {
        grid-template-columns: 1fr;
    }

    .edu-grid-compact {
        grid-template-columns: 1fr;
    }

    .search-input {
        font-size: 1rem;
        padding: 0.85rem 1rem;
    }

    .institutional-content {
        gap: 1rem;
    }

    .section-card,
    .social-links-section,
    .consejo-gallery-section {
        padding: 1.25rem;
    }

    .consejo-gallery-grid {
        grid-template-columns: 1fr;
    }

    .consejo-gallery-item img {
        height: 200px;
    }

    .message-card form {
        flex-direction: column !important;
    }

    .btn-drive-large {
        display: block;
        text-align: center;
        font-size: 0.95rem;
        padding: 0.85rem 1rem;
        word-break: break-word;
    }
}

@media (max-width: 480px) {
    .header-title {
        font-size: 1rem;
    }

    .stat-card p {
        font-size: 2rem;
    }

    .social-icon-link {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }
}

/* ============================================================
   SECCIÓN DE RECURSOS EDUCATIVOS (COURSE CARDS)
   ============================================================ */
.edu-category-section {
    margin-bottom: 3.5rem;
    animation: fadeIn 0.6s ease;
}

.edu-category-section h3 {
    font-family: 'Merriweather', serif;
    font-size: 1.6rem;
    color: var(--usac-blue);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.edu-category-section h3::before {
    content: "";
    display: inline-block;
    width: 5px;
    height: 1.5rem;
    background-color: var(--bronze);
    border-radius: 4px;
}

.edu-category-desc {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 1.75rem;
    font-family: 'Merriweather', serif;
    font-style: italic;
    opacity: 0.95;
}

/* Cuadrícula responsiva */
.edu-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.50rem;
    margin-bottom: 1rem;
}

/* Tarjeta interactiva */
.edu-card {
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: var(--gray-800);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    height: 100%;
}

.edu-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--gray-300);
}

/* Wrapper de la imagen superior */
.edu-card-img-wrapper {
    position: relative;
    width: 100%;
    height: 140px;
    overflow: hidden;
    background-color: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.edu-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.edu-card:hover .edu-card-img {
    transform: scale(1.06);
}

/* Placeholder para tarjetas sin imagen (ej. CONDUSEF) */
.edu-card-placeholder {
    width: 100%;
    height: 140px;
    background: linear-gradient(135deg, var(--usac-blue), var(--gray-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.2rem;
    position: relative;
    overflow: hidden;
}

.edu-card-placeholder::after {
    content: "";
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
}

/* Cuerpo de la tarjeta */
.edu-card-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Información de plataforma superior */
.edu-card-platform-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.platform-icon {
    font-size: 0.85rem;
}

/* Título del recurso */
.edu-card-title {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 1.25rem;
    line-height: 1.4;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Badges / Etiquetas */
.edu-card-badge-container {
    margin-top: auto;
}

.edu-card-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 6px;
    text-transform: capitalize;
    transition: var(--transition);
}

/* Paleta de colores para badges (Diseño Premium) */
.badge-free {
    background-color: #E8F5E9;
    color: #2E7D32;
}

.badge-tech {
    background-color: #E3F2FD;
    color: #1565C0;
}

.badge-academic {
    background-color: #F3E5F5;
    color: #6A1B9A;
}

.badge-local {
    background-color: #FFF3E0;
    color: #E65100;
}

.badge-professional {
    background-color: #E0F7FA;
    color: #006064;
}

/* ============================================================
   RESPONSIVIDAD Y MODO OSCURO PARA COURSE CARDS
   ============================================================ */

/* Modo Oscuro */
body.dark .edu-category-section h3 {
    color: var(--gray-900) !important;
}

body.dark .edu-category-section h3::before {
    background-color: var(--usac-blue) !important;
}

body.dark .edu-category-desc {
    color: var(--gray-600) !important;
}

body.dark .edu-card {
    background-color: var(--gray-800) !important;
    border-color: var(--gray-400) !important;
    color: var(--gray-900) !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.25);
}

body.dark .edu-card:hover {
    border-color: var(--gray-300) !important;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
}

body.dark .edu-card-img-wrapper {
    background-color: var(--gray-100) !important;
    border-bottom-color: var(--gray-400) !important;
}

body.dark .edu-card-title {
    color: var(--gray-900) !important;
}

body.dark .edu-card-platform-info {
    color: var(--gray-600) !important;
}

body.dark .badge-free {
    background-color: rgba(76, 175, 80, 0.15) !important;
    color: #81C784 !important;
}

body.dark .badge-tech {
    background-color: rgba(33, 150, 243, 0.15) !important;
    color: #64B5F6 !important;
}

body.dark .badge-academic {
    background-color: rgba(156, 39, 176, 0.15) !important;
    color: #BA68C8 !important;
}

body.dark .badge-local {
    background-color: rgba(255, 152, 0, 0.15) !important;
    color: #FFB74D !important;
}

body.dark .badge-professional {
    background-color: rgba(0, 188, 212, 0.15) !important;
    color: #4DD0E1 !important;
}

/* Responsividad */
@media (max-width: 1024px) {
    .edu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .edu-grid {
        grid-template-columns: 1fr;
    }

    .edu-category-section h3 {
        font-size: 1.35rem;
    }
}

/* Tarjetas compactas para "Otros Recursos" */
.edu-grid-compact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 1rem;
}

.edu-card-compact {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.9rem 1.15rem;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    text-decoration: none;
    color: var(--gray-800);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.edu-card-compact:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--gray-300);
}

.edu-card-compact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--gray-100);
    color: var(--usac-blue);
    font-size: 1rem;
    flex-shrink: 0;
    transition: var(--transition);
}

.edu-card-compact:hover .edu-card-compact-icon {
    background-color: var(--usac-blue);
    color: var(--white);
}

.edu-card-compact-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex-grow: 1;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.edu-card-compact-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.edu-card-compact-desc {
    font-size: 0.75rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0.1rem;
}

/* Dark Mode para tarjetas compactas */
body.dark .edu-card-compact {
    background-color: var(--gray-800) !important;
    border-color: var(--gray-400) !important;
    color: var(--gray-900) !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
}

body.dark .edu-card-compact:hover {
    border-color: var(--gray-300) !important;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.4);
}

body.dark .edu-card-compact-icon {
    background-color: var(--gray-300) !important;
    color: var(--gray-900) !important;
}

body.dark .edu-card-compact:hover .edu-card-compact-icon {
    background-color: var(--usac-blue) !important;
    color: var(--white) !important;
}

body.dark .edu-card-compact-title {
    color: var(--gray-900) !important;
}

body.dark .edu-card-compact-desc {
    color: var(--gray-600) !important;
}

@media (max-width: 1024px) {
    .edu-grid-compact {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .edu-grid-compact {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   SECCIONES DE CATEGORÍA (para el tab de IA)
   ============================================================ */
.edu-category-section {
    margin-bottom: 2.5rem;
}

.edu-category-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.edu-category-section h3 i {
    color: var(--usac-blue);
    font-size: 1rem;
}

.edu-category-desc {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-style: italic;
}

/* Badge de contexto local/LatAm */
.badge-local {
    background-color: #e8f5e9;
    color: #2e7d32;
}

/* Dark mode para categorías de IA */
body.dark .edu-category-section h3 {
    color: var(--gray-100) !important;
}

body.dark .edu-category-section h3 i {
    color: var(--gray-300) !important;
}

body.dark .edu-category-desc {
    color: var(--gray-400) !important;
}

body.dark .badge-local {
    background-color: #1b5e20;
    color: #a5d6a7;
}

/* ============================================================
   ACORDEÓN HORIZONTAL POR FILAS - BIBLIOTECA CUNOC
   ============================================================ */

/* Contenedor de cada fila temática */
#tab-cursos .accordion-row {
    display: flex !important;
    width: 100%;
    height: 400px;
    gap: 10px;
    overflow: hidden;
    margin-bottom: 3rem;
}

/* Tarjeta individual */
#tab-cursos .accordion-row .edu-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    text-decoration: none !important;
    flex: 1;
    transition: flex 0.7s cubic-bezier(0.25, 1, 0.5, 1), filter 0.4s;
    min-width: 80px;
    height: 100%;
    filter: grayscale(85%) brightness(0.6);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Hover en fila */
#tab-cursos .accordion-row:hover .edu-card {
    flex: 0.6;
    filter: grayscale(100%) brightness(0.4);
}

#tab-cursos .accordion-row .edu-card:hover {
    flex: 5;
    filter: grayscale(0%) brightness(1);
    z-index: 10;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    transform: scale(1.02);
}

/* Imagen */
#tab-cursos .accordion-row .edu-card-img-wrapper {
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

#tab-cursos .accordion-row .edu-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

#tab-cursos .accordion-row .edu-card:hover .edu-card-img {
    transform: scale(1.1);
}

/* Overlay oscuro */
#tab-cursos .accordion-row .edu-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
    opacity: 0.7;
    transition: opacity 0.5s;
    z-index: 1;
    pointer-events: none;
}

#tab-cursos .accordion-row .edu-card:hover::after {
    opacity: 0.95;
}

/* Cuerpo de tarjeta */
#tab-cursos .accordion-row .edu-card-body {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    color: white;
    z-index: 2;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.6s ease 0.1s;
    pointer-events: none;
    font-family: 'Merriweather', serif;
}

#tab-cursos .accordion-row .edu-card:hover .edu-card-body {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* Tipografía */
#tab-cursos .accordion-row .edu-card-title {
    font-size: 1.8rem;
    line-height: 1.2;
    margin: 15px 0;
    color: #FFF !important;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    -webkit-line-clamp: unset;
    line-clamp: unset;
    display: block;
}

#tab-cursos .accordion-row .edu-card-platform-info {
    color: rgba(255, 255, 255, 0.9) !important;
    font-size: 0.9rem;
    letter-spacing: 1px;
    font-weight: bold;
}

#tab-cursos .accordion-row .edu-card-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #FFF !important;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* MODO OSCURO */
body.dark #tab-cursos .accordion-row .edu-card {
    filter: grayscale(90%) brightness(0.5);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

body.dark #tab-cursos .accordion-row .edu-card:hover {
    filter: grayscale(0%) brightness(1);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

body.dark #tab-cursos .accordion-row .edu-card::after {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.98) 0%, rgba(0, 0, 0, 0.6) 40%, transparent 100%);
}

/* Placeholder sin imagen dentro del acordeón horizontal */
#tab-cursos .accordion-row .edu-card-placeholder {
    height: 100%;
    font-size: 3rem;
}

/* RESPONSIVE - MÓVIL */
@media (max-width: 900px) {
    #tab-cursos .accordion-row {
        flex-direction: column !important;
        height: auto !important;
        gap: 15px !important;
        display: flex !important;
    }

    #tab-cursos .accordion-row .edu-card {
        display: flex !important;
        flex-direction: row !important;
        flex: none !important;
        width: 100% !important;
        height: 110px !important;
        filter: none !important;
        border-radius: 12px !important;
        background-color: var(--white) !important;
        box-shadow: var(--shadow-sm) !important;
        border: 1px solid var(--gray-200) !important;
        overflow: hidden !important;
        text-decoration: none !important;
    }

    #tab-cursos .accordion-row .edu-card-img-wrapper {
        position: relative !important;
        width: 100px !important;
        height: 100% !important;
        flex-shrink: 0 !important;
        float: none !important;
        background-color: var(--gray-100) !important;
        border-right: 1px solid var(--gray-200) !important;
    }

    #tab-cursos .accordion-row .edu-card-img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
    }

    #tab-cursos .accordion-row .edu-card-body {
        position: relative !important;
        opacity: 1 !important;
        transform: none !important;
        width: auto !important;
        flex-grow: 1 !important;
        height: 100% !important;
        float: none !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        padding: 12px 15px !important;
        background-color: var(--white) !important;
        color: var(--gray-800) !important;
        pointer-events: auto !important;
    }

    body.dark #tab-cursos .accordion-row .edu-card {
        background-color: var(--gray-800) !important;
        border-color: var(--gray-700) !important;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4) !important;
    }

    body.dark #tab-cursos .accordion-row .edu-card-img-wrapper {
        background-color: var(--gray-900) !important;
        border-right: 1px solid var(--gray-700) !important;
    }

    body.dark #tab-cursos .accordion-row .edu-card-body {
        background-color: var(--gray-800) !important;
        color: var(--gray-900) !important;
    }

    #tab-cursos .accordion-row .edu-card-title {
        font-size: 0.95rem !important;
        margin: 2px 0 6px 0 !important;
        color: var(--gray-800) !important;
        text-shadow: none !important;
        font-weight: 700 !important;
        line-height: 1.3 !important;
        display: -webkit-box !important;
        -webkit-line-clamp: 2 !important;
        line-clamp: 2 !important;
        -webkit-box-orient: vertical !important;
        overflow: hidden !important;
    }

    body.dark #tab-cursos .accordion-row .edu-card-title {
        color: var(--gray-900) !important;
    }

    #tab-cursos .accordion-row .edu-card-platform-info {
        color: var(--gray-500) !important;
        font-size: 0.7rem !important;
        margin-bottom: 2px !important;
        display: flex !important;
        align-items: center !important;
        gap: 4px !important;
        font-weight: bold !important;
    }

    body.dark #tab-cursos .accordion-row .edu-card-platform-info {
        color: var(--gray-400) !important;
    }

    #tab-cursos .accordion-row .edu-card::after {
        display: none !important;
    }

    #tab-cursos .accordion-row .edu-card-badge-container {
        margin-top: 0 !important;
    }

    #tab-cursos .accordion-row .edu-card-badge {
        display: inline-block !important;
        padding: 2px 8px !important;
        font-size: 0.68rem !important;
        border-radius: 4px !important;
        text-transform: capitalize !important;
        font-weight: 600 !important;
    }
}


/* Subheader and card description styles */
.functions-subheader {
    margin: 3rem 0 1.5rem;
    padding: 1rem 1.5rem;
    background: rgba(102, 126, 234, 0.08);
    border-left: 4px solid #667eea;
    border-radius: 6px;
}

.functions-subheader h3 {
    font-size: 1.3rem;
    margin: 0 0 0.25rem;
    color: #2c3e50;
}

.functions-subheader p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

body.dark .functions-subheader {
    background: rgba(59, 130, 246, 0.12) !important;
    border-left-color: #3B82F6 !important;
}

body.dark .functions-subheader h3 {
    color: #93C5FD !important;
}

body.dark .functions-subheader p {
    color: #9CA3AF !important;
}

.edu-card-description {
    font-size: 0.85rem;
    color: #666;
    margin: 0.5rem 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

body.dark .edu-card-description {
    color: #9CA3AF !important;
}

.category-title {
    font-size: 1.4rem;
    margin: 3rem 0 1.5rem;
    color: #2c3e50;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
    font-weight: 600;
}

body.dark .category-title {
    color: #93C5FD !important;
    border-bottom-color: #3B82F6 !important;
}

.card-desc {
    font-size: 0.85rem;
    color: #666;
    margin: 0.5rem 0;
    line-height: 1.4;
}

body.dark .card-desc {
    color: #9CA3AF !important;
}

/* Separación de secciones */
#plataformas-globales,
#otros-recursos {
    padding: 3rem 2rem;
    border-radius: 12px;
    margin-bottom: 3rem;
}

#plataformas-globales {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

#otros-recursos {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    margin-top: 4rem;
}

body.dark #plataformas-globales {
    background: linear-gradient(135deg, #1e3a5f 0%, #1e293b 100%) !important;
}

body.dark #otros-recursos {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%) !important;
    margin-top: 4rem;
}

/* ============================================================
   DARK MODE — CORRECCIONES COMPLETAS
   Cubre todas las secciones, encabezados y textos
   ============================================================ */

/* Fondo principal de cada tab y secciones contenedoras */
body.dark .tab-content,
body.dark #view-biblioteca,
body.dark .main-view {
    background: var(--gray-100) !important;
    color: var(--gray-900) !important;
}

/* Secciones con clase .theme-section (fondos blancos explícitos) */
body.dark .theme-section {
    background-color: var(--gray-200) !important;
    color: var(--gray-900) !important;
    border-color: var(--gray-400) !important;
}

/* Encabezados de sección */
body.dark .functions-header {
    background: transparent !important;
}

body.dark .functions-header h2,
body.dark .functions-header p {
    color: var(--gray-700) !important;
}

/* Subtítulos de categoría (IA, Cursos, etc.) */
body.dark .category-title {
    color: #93C5FD !important;
    /* azul claro visible en oscuro */
    border-bottom-color: #3B82F6 !important;
}

/* Subheaders de funciones */
body.dark .functions-subheader {
    background: rgba(59, 130, 246, 0.15) !important;
    border-left-color: #3B82F6 !important;
}

body.dark .functions-subheader h3 {
    color: #93C5FD !important;
}

body.dark .functions-subheader p {
    color: #9CA3AF !important;
}

/* Descripciones de tarjetas IA y otros textos descriptivos */
body.dark .card-desc,
body.dark .edu-card-description {
    color: #9CA3AF !important;
}

/* Encabezados de sección Plataforma General */
body.dark .news-section h2,
body.dark .repo-section h2,
body.dark .drive-section h2,
body.dark .student-contribution h2,
body.dark .communication-section h2 {
    color: #93C5FD !important;
    border-bottom-color: var(--gray-400) !important;
}

body.dark .news-section p,
body.dark .drive-section p {
    color: var(--gray-300) !important;
}

/* Secciones de gradiente → reemplazar por gradiente oscuro */
body.dark #plataformas-globales {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%) !important;
    border: 2px solid #334155 !important;
}

body.dark #otros-recursos {
    background: linear-gradient(135deg, #1c1917 0%, #292524 100%) !important;
    border: 2px solid #44403c !important;
}

/* Títulos h3/h4 dentro de esas secciones */
body.dark #plataformas-globales h3,
body.dark #otros-recursos h3,
body.dark #plataformas-globales h4,
body.dark #otros-recursos h4,
body.dark #plataformas-globales .category-title,
body.dark #otros-recursos .category-title {
    color: #93C5FD !important;
}

/* Plataforma General — inputs y contenedores */
body.dark .search-section input {
    background: var(--gray-800) !important;
    color: var(--gray-900) !important;
    border-color: var(--gray-400) !important;
}

body.dark .search-section input::placeholder {
    color: var(--gray-500) !important;
}

/* Botón Drive */
body.dark .btn-drive-large {
    background: #1e3a5f !important;
    color: #93C5FD !important;
    border-color: #3B82F6 !important;
}

body.dark .btn-drive-large:hover {
    background: #1d4ed8 !important;
    color: #fff !important;
}

/* Tarjetas de anuncio, mensaje, doc, en modo oscuro */
body.dark .announcement-card,
body.dark .doc-card,
body.dark .message-card {
    background: var(--gray-800) !important;
    color: var(--gray-900) !important;
    border-left-color: transparent !important;
    border-top-color: #3B82F6 !important;
}

body.dark .announcement-card h3,
body.dark .announcement-card h4,
body.dark .doc-card h3,
body.dark .doc-card h4,
body.dark .message-card h3,
body.dark .message-card h4 {
    color: #93C5FD !important;
}

body.dark .announcement-card p,
body.dark .doc-card p,
body.dark .message-card p {
    color: #9CA3AF !important;
}

body.dark .ann-meta {
    color: #6B7280 !important;
    border-top-color: rgba(255, 255, 255, .08) !important;
}

/* Secciones de inicio (section-card, objective-card, about-section) */
body.dark .section-card,
body.dark .objective-card,
body.dark .function-card,
body.dark .about-section,
body.dark .about-block {
    background: var(--gray-800) !important;
    color: var(--gray-900) !important;
}

body.dark .section-card h3,
body.dark .objective-card h4,
body.dark .function-card h3,
body.dark .about-section h2,
body.dark .about-block h3 {
    color: #93C5FD !important;
}

body.dark .section-card p,
body.dark .objective-card p,
body.dark .function-card p,
body.dark .about-section p,
body.dark .about-block p {
    color: #9CA3AF !important;
}

/* Hero sections */
body.dark .hero-section,
body.dark .institutional-hero {
    background: linear-gradient(135deg, #1e3a5f, #1e293b) !important;
    color: #E5E7EB !important;
}

/* Titles h1, h2, h3 genéricos dentro de tabs */
body.dark .tab-content h1,
body.dark .tab-content h2:not(.functions-header h2) {
    color: var(--gray-700) !important;
}

body.dark .tab-content p {
    color: var(--gray-600) !important;
}

/* Social links */
body.dark .social-links-section {
    background: var(--gray-800) !important;
    color: var(--gray-900) !important;
}

/* ============================================================
   IMÁGENES EN TARJETAS DE ANUNCIO
   ============================================================ */
.interactive-image {
    display: block;
    cursor: zoom-in;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    transform-origin: center;
}

.interactive-image:hover,
.interactive-image:focus-visible {
    transform: scale(1.03);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
    opacity: 0.96;
}

.interactive-image:active {
    transform: scale(0.98);
}

.ann-card-img {
    width: 100%;
    max-height: 220px;
    object-fit: cover;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.ann-card-img:hover {
    opacity: 0.88;
}

/* ============================================================
   LIGHTBOX MODAL (IMAGEN A PANTALLA COMPLETA)
   ============================================================ */
#img-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.2s ease;
    cursor: zoom-out;
}

#img-lightbox.open {
    display: flex;
}

#img-lightbox img {
    max-width: min(95vw, 1200px);
    max-height: 92vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 48px rgba(0, 0, 0, 0.7);
    cursor: default;
    animation: scaleIn 0.25s ease;
}

#img-lightbox-close {
    position: fixed;
    top: 1.2rem;
    right: 1.5rem;
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 100000;
}

#img-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Botones de navegación en el lightbox */
.lightbox-nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    font-size: 2.5rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 100000;
    font-weight: bold;
    user-select: none;
}

.lightbox-nav-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.lightbox-nav-btn:active {
    background: rgba(255, 255, 255, 0.35);
}

#img-lightbox-prev {
    left: 1rem;
}

#img-lightbox-next {
    right: 1rem;
}

/* Indicador de posición en la galería */
#img-lightbox-counter {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    z-index: 100000;
}

/* ============================================================
   TARJETAS LEGALES EXPANDIBLES — SECCIÓN ACERCA DE
   ============================================================ */
.legal-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}
.legal-icon {
    font-size: 1.6rem;
    flex-shrink: 0;
    line-height: 1;
}
.legal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--usac-blue);
}
.legal-summary {
    font-size: 0.93rem;
    line-height: 1.65;
    color: var(--gray-700);
    margin-bottom: 0;
}
.legal-summary strong { color: var(--gray-800); }
.expand-hint {
    display: block;
    margin-top: 0.6rem;
    font-size: 0.82rem;
    color: var(--gray-500);
    font-style: italic;
    transition: opacity 0.3s ease;
}
.legal-card {
    overflow: hidden;
    cursor: pointer;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.legal-card:hover,
.legal-card.expanded {
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
    transform: translateY(-2px);
}
.legal-card:hover .expand-hint,
.legal-card.expanded .expand-hint { opacity: 0; }
.legal-full {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.55s cubic-bezier(0.4,0,0.2,1),
                opacity 0.4s ease 0.1s;
}
.legal-card:hover .legal-full,
.legal-card.expanded .legal-full {
    max-height: 3000px;
    opacity: 1;
}
.legal-section {
    margin-top: 1.1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}
.legal-section h4 {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--usac-blue);
    margin: 0 0 0.5rem 0;
}
.legal-section p {
    font-size: 0.91rem;
    line-height: 1.7;
    color: var(--gray-600);
    margin: 0.4rem 0;
    text-align: justify;
}
.legal-section ul { padding-left: 1.3rem; margin: 0.5rem 0; }
.legal-section li {
    font-size: 0.91rem;
    line-height: 1.65;
    color: var(--gray-600);
    margin: 0.3rem 0;
}
.legal-warning-section {
    background: rgba(220,38,38,.06);
    padding: 0.9rem 1rem;
    border-radius: var(--radius-sm);
    border-left: 3px solid #dc2626;
    border-top: none;
    margin-top: 1rem;
}
.legal-warning-section h4 { color: #b91c1c; }
.legal-warning-section strong { color: #b91c1c; }

body.dark .legal-warning-section h4 { color: #FCA5A5 !important; }
body.dark .legal-warning-section strong { color: #FCA5A5 !important; }
.legal-contact-section a {
    color: var(--usac-blue);
    font-weight: 600;
    text-decoration: none;
}
.legal-contact-section a:hover { text-decoration: underline; }
.legal-footer-note {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-200);
    text-align: center;
    font-size: 0.82rem;
    color: var(--gray-500);
    font-style: italic;
    line-height: 1.6;
}
.legal-footer-note strong { color: var(--usac-blue); font-style: normal; }
.legal-card-drive { border-left-color: #dc2626 !important; }
.legal-card-drive .legal-header h3 { color: #b91c1c; }

body.dark .legal-card-drive { border-left-color: #FCA5A5 !important; }
body.dark .legal-card-drive .legal-header h3 { color: #FCA5A5 !important; }
.legal-card:focus-visible {
    outline: 2px solid var(--usac-blue);
    outline-offset: 2px;
}
body.dark .legal-warning-section { background: rgba(220,38,38,.14) !important; }
body.dark .legal-section { border-top-color: var(--gray-300) !important; }
body.dark .expand-hint { color: var(--gray-500) !important; }
body.dark .legal-footer-note { color: #9CA3AF !important; }
body.dark .legal-footer-note strong { color: var(--gray-700) !important; }
body.dark .legal-contact-section a { color: #93C5FD !important; }

body.dark .legal-summary {
    color: #D1D5DB !important;
}

body.dark .legal-summary strong {
    color: #F3F4F6 !important;
}

body.dark .legal-section p {
    color: #D1D5DB !important;
}

body.dark .legal-section li {
    color: #D1D5DB !important;
}

body.dark .legal-section h4 {
    color: #93C5FD !important;
}
@media (max-width: 768px) {
    .legal-card:hover .legal-full { max-height: 0; opacity: 0; }
    .legal-card:hover .expand-hint { opacity: 1; }
    .legal-card:hover { transform: none; box-shadow: none; }
    
    /* Mostrar contenido si está expandido explícitamente en móvil */
    .legal-card.expanded .legal-full {
        max-height: 3000px !important;
        opacity: 1 !important;
    }
    .legal-card.expanded .expand-hint {
        opacity: 0 !important;
    }
}
/* ==== Guided Tour Tooltip Card ==== */
.tour-tooltip {
  position: absolute;
  background: #1e1e2d;
  color: #ffffff;
  padding: 1.1rem;
  border-radius: 0.8rem;
  box-shadow: 0 12px 32px rgba(0,0,0,0.5), 0 0 0 2px #ffb400;
  z-index: 999999;
  min-width: 250px;
  max-width: 310px;
  font-size: 0.92rem;
  animation: tourFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes tourFadeIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.tour-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.tour-step-tag {
  font-size: 0.72rem;
  color: #ffb400;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
}

.tour-close-btn {
  background: transparent !important;
  border: none !important;
  color: #a0a0c0 !important;
  font-size: 1.1rem !important;
  padding: 0 0.3rem !important;
  margin: 0 !important;
  cursor: pointer;
  line-height: 1;
}
.tour-close-btn:hover {
  color: #ffffff !important;
}

.tour-body {
  margin-bottom: 0.9rem;
}

.tour-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.35rem;
  line-height: 1.3;
}

.tour-desc {
  font-size: 0.85rem;
  color: #c0c0d8;
  line-height: 1.45;
  margin: 0;
}

.tour-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.tour-next-btn {
  background: #ffb400;
  color: #111827;
  border: none;
  padding: 0.45rem 0.95rem;
  border-radius: 0.45rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(255, 180, 0, 0.3);
}

.tour-next-btn:hover {
  background: #ffa000;
  transform: translateY(-1px);
}

.tour-highlight {
  outline: 3px solid #ffb400 !important;
  outline-offset: 3px !important;
  border-radius: 4px !important;
  box-shadow: 0 0 15px rgba(255, 180, 0, 0.6) !important;
}
/* End of guided tour tooltip styles */

/* ============================================================
   EMPRENDIMIENTOS — Vitrina de Negocios
   ============================================================ */

.emp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 0.5rem 0;
}

/* ── Imagen de portada de la tarjeta ── */
.emp-card-img-wrap {
    width: 100%;
    height: 170px;
    overflow: hidden;
    flex-shrink: 0;
}

.emp-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.emp-card:hover .emp-card-img {
    transform: scale(1.06);
}

.emp-card-img-placeholder {
    background: linear-gradient(135deg, #1a2340 0%, #252f4a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.emp-placeholder-emoji {
    font-size: 3.5rem;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
    opacity: 0.85;
}

/* ── Upload de imagen en formulario admin ── */
.emp-img-upload-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.emp-img-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.emp-img-drop-area {
    position: relative;
    width: 100%;
    height: 130px;
    border: 2px dashed var(--gray-300);
    border-radius: 10px;
    cursor: pointer;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--gray-100);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.emp-img-drop-area:hover {
    border-color: var(--bronze);
    background: rgba(212, 161, 92, 0.05);
}

#emp-img-preview {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.emp-img-remove-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: #e53e3e;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.3rem 0.7rem;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.18s;
    width: fit-content;
}

.emp-img-remove-btn:hover { background: #c53030; }

/* Dark mode */
.dark .emp-img-drop-area { background: var(--gray-200); border-color: var(--gray-400); }
.dark .emp-img-label { color: var(--gray-300); }
.dark .emp-card-img-placeholder { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); }

#emp-img-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 0.5rem;
    color: var(--gray-500);
}

.emp-card {
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
    border: 1px solid var(--gray-200);
}

.emp-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.13);
}

.emp-card-header {
    background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
    padding: 0.75rem 1rem;
}

.emp-category-badge {
    display: inline-block;
    background: rgba(245,166,35,0.18);
    color: #F5A623;
    border: 1px solid rgba(245,166,35,0.4);
    border-radius: 20px;
    padding: 0.2rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.emp-card-body {
    flex: 1;
    padding: 1.1rem 1.25rem 0.75rem;
}

.emp-name {
    font-size: 1.15rem;
    font-weight: 800;
    margin: 0 0 0.3rem;
    color: var(--gray-800);
}

.emp-owner {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin: 0 0 0.7rem;
}

.emp-desc {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.55;
    margin: 0;
}

.emp-card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.85rem 1.25rem 1rem;
    border-top: 1px solid var(--gray-200);
}

.emp-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    transition: background 0.18s, transform 0.15s, color 0.18s;
}

.emp-link-btn:hover {
    transform: scale(1.05);
    background: var(--gray-200);
}

.emp-link-btn.emp-facebook {
    background: #1877F2;
    color: #fff;
    border-color: #1877F2;
}
.emp-link-btn.emp-facebook:hover { background: #155ebe; }

.emp-link-btn.emp-instagram {
    background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    color: #fff;
    border-color: transparent;
}
.emp-link-btn.emp-instagram:hover { opacity: 0.9; }

.emp-link-btn.emp-whatsapp {
    background: #25D366;
    color: #fff;
    border-color: #25D366;
}
.emp-link-btn.emp-whatsapp:hover { background: #1da851; }

.emp-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-400);
}

/* Dark mode */
.dark .emp-card { border-color: var(--gray-700); background: var(--gray-800); }
.dark .emp-name { color: var(--gray-100); }
.dark .emp-desc { color: var(--gray-300); }
.dark .emp-card-footer { border-top-color: var(--gray-700); }
.dark .emp-link-btn { background: var(--gray-700); color: var(--gray-200); border-color: var(--gray-600); }
.dark .emp-link-btn:hover { background: var(--gray-600); }

@media (max-width: 600px) {
    .emp-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   PANTALLA DE BIENVENIDA ANIMADA (CANVAS + EFECTOS)
   ============================================================ */
#welcome-screen {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 99999;
    background: var(--daily-bg, #08090c);
    font-family: 'Inter', sans-serif;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

#welcome-screen * {
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
}

#welcome-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#ws-canvas {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#ws-lampara {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(
        circle 480px at var(--ws-mx, 50%) var(--ws-my, 38%),
        rgba(212, 161, 92, 0.16),
        rgba(212, 161, 92, 0.05) 40%,
        transparent 70%
    );
    transition: background 0.15s ease-out;
}

#ws-vineta {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: radial-gradient(
        ellipse at 50% 40%,
        transparent 35%,
        rgba(10, 12, 24, 0.55) 100%
    );
}

#ws-main {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    transition: transform 0.25s ease-out;
    will-change: transform;
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.ws-marca {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #d4a15c;
    letter-spacing: 0.22em;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 22px;
    opacity: 0.9;
}

.ws-marca::before,
.ws-marca::after {
    content: '';
    width: 28px;
    height: 1px;
    background: linear-gradient(90deg, transparent, #d4a15c);
}
.ws-marca::after {
    background: linear-gradient(90deg, #d4a15c, transparent);
}

.ws-titulo {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    color: #f4ede0;
    margin: 0;
    line-height: 1.08;
    text-shadow: 0 0 40px rgba(212, 161, 92, 0.15);
}

.ws-titulo em {
    font-style: italic;
    color: #f0c987;
    font-weight: 500;
}

.ws-sub {
    font-size: 16px;
    color: #b9b2a6;
    max-width: 420px;
    margin: 18px auto 0;
    line-height: 1.6;
    font-weight: 400;
}

.ws-accion {
    margin-top: 40px;
    display: inline-flex;
    align-items: center;
    gap: 14px;
}

.ws-btn-ingresar {
    position: relative;
    padding: 15px 38px;
    background: transparent;
    color: #f0c987;
    border: 1px solid rgba(212, 161, 92, 0.55);
    border-radius: 2px;
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
    overflow: hidden;
    transition: color 0.35s ease, border-color 0.35s ease;
    z-index: 10;
}

.ws-btn-ingresar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, #d4a15c, #f0c987);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
    z-index: -1;
}

.ws-btn-ingresar:hover {
    color: #0e1224;
    border-color: #f0c987;
}

.ws-btn-ingresar:hover::before {
    transform: scaleX(1);
}

.ws-pista {
    margin-top: 26px;
    font-size: 12px;
    color: #8892b3;
    letter-spacing: 0.04em;
    opacity: 0.75;
}

.ws-footer {
    position: absolute;
    bottom: 26px;
    left: 0;
    right: 0;
    z-index: 3;
    text-align: center;
    color: #8892b3;
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    pointer-events: none;
}


/* ----------- Muro de Noticias en móviles ----------- */
@media (max-width: 768px) {
    #announcements-list {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
}