/* Color Palette and Variables */
:root {
    /* Primary Colors */
    --primary: #FF6B00; /* Vibrant Orange */
    --primary-light: #FF8533;
    --primary-dark: #cc5600;
    
    /* Light Theme (Default) */
    --bg-color: #f7f9fa;
    --bg-surface: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --overlay-color: rgba(0, 0, 0, 0.4);
    
    /* Fonts */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Layout */
    --header-height: 85px;
    --content-max-width: 800px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    /* Transitions */
    --trans-fast: 0.15s ease;
    --trans-normal: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Slight bounce */
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-color: #121212;
    --bg-surface: #1e1e1e;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --overlay-color: rgba(0, 0, 0, 0.7);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color var(--trans-normal), color var(--trans-normal);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--trans-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.primary-color { color: var(--primary); }

/* Buttons & Inputs */
.icon-btn {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--trans-fast), transform var(--trans-normal);
}

.icon-btn:hover, .icon-btn:active {
    background-color: var(--border-color);
    transform: scale(1.05);
}

.icon-btn .material-symbols-rounded {
    font-size: 28px;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius-lg);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: transform var(--trans-normal), box-shadow var(--trans-fast), background-color var(--trans-fast);
}

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(255, 107, 0, 0.4);
}

.btn-primary:active {
    transform: scale(0.95);
    box-shadow: 0 2px 8px rgba(255, 107, 0, 0.4);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary.outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-block {
    width: 100%;
}

/* Header */
.app-header {
    height: var(--header-height);
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
    transition: background-color var(--trans-normal);
}

[data-theme="dark"] .app-header {
    /* Mantenemos el color naranja original */
    background-color: var(--primary);
}

.app-header .icon-btn {
    color: white;
}

.app-header .icon-btn:hover, .app-header .icon-btn:active {
    background-color: rgba(255, 255, 255, 0.2);
}

.logo-container {
    height: 60px;
    display: flex;
    align-items: center;
}

.header-logo {
    height: 100%;
    object-fit: contain;
}

/* Sidebar Menu */
.sidebar {
    position: fixed;
    top: 0;
    left: -280px; 
    width: 280px;
    height: 100vh;
    background-color: var(--bg-surface);
    z-index: 1000;
    box-shadow: var(--shadow-md);
    transition: left var(--trans-normal);
    display: flex;
    flex-direction: column;
}

.sidebar.open {
    left: 0;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-links {
    padding: 16px 0;
    flex: 1;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    color: var(--text-main);
    font-weight: 500;
    font-size: 1.1rem;
    transition: background-color var(--trans-fast), color var(--trans-fast), padding-left var(--trans-normal);
}

.nav-link:active, .nav-link:hover {
    background-color: var(--border-color);
    color: var(--primary);
    padding-left: 30px;
}

.nav-link.active-link {
    color: var(--primary);
    background-color: rgba(255, 107, 0, 0.1);
    border-right: 4px solid var(--primary);
}

.nav-link.active-link .material-symbols-rounded {
    color: var(--primary);
}

.nav-link .material-symbols-rounded {
    color: var(--text-muted);
}
.nav-link:hover .material-symbols-rounded, .nav-link:active .material-symbols-rounded {
    color: var(--primary);
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
}

.badge-bg-orange {
    background-color: var(--primary);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform var(--trans-normal);
}
.badge-bg-orange:active {
    transform: scale(0.95);
}
.badge-bg-orange img {
    max-height: 70px;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--overlay-color);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--trans-fast);
    backdrop-filter: blur(2px);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* App Container */
.app-container {
    padding-top: var(--header-height);
    min-height: 100vh;
    max-width: var(--content-max-width);
    margin: 0 auto;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
}

.view {
    flex: 1;
    display: none;
    animation: fadeIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1);
    padding: 20px 16px;
    padding-bottom: 80px; /* Padding for FAB */
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.d-none {
    display: none !important;
}

/* Shared Components */
.page-header {
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 1.75rem;
    margin-bottom: 8px;
}

.content-card {
    background-color: var(--bg-surface);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

/* View: Home */
.hero-section {
    text-align: center;
    padding: 8px 16px;
    background: var(--primary);
    border-radius: var(--border-radius-lg);
    color: white;
    box-shadow: var(--shadow-md);
    width: fit-content;
    margin: 0 auto 32px auto;
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #8a3a00 100%);
}

.hero-logo-box {
    background: white;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.hero-icon {
    width: 90px;
    height: 90px;
    object-fit: contain;
}

.hero-quote-img {
    width: 100%;
    max-width: 250px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.hero-section h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.hero-section h1 span {
    display: block;
    font-weight: 800;
}

.hero-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 24px;
}

.hero-actions .btn-primary {
    background-color: white;
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.news-section h2 {
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.post-placeholder {
    background-color: var(--bg-surface);
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px 16px;
    text-align: center;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.post-placeholder .material-symbols-rounded {
    font-size: 48px;
    color: var(--primary);
}

.home-footer {
    display: flex;
    justify-content: center;
    margin-top: 32px;
}

.inline-badge img { max-width: 320px; width: auto; height: auto; object-fit: contain; }

/* View: Carreras & Accordion */
.search-container {
    position: relative;
    margin-bottom: 16px;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

#search-input {
    width: 100%;
    padding: 14px 14px 14px 44px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-surface);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.15);
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.crumb {
    cursor: pointer;
    transition: color var(--trans-fast);
}

.crumb:hover { color: var(--primary); }
.crumb.active {
    font-weight: 600;
    color: var(--text-main);
    pointer-events: none;
}
.crumb::after {
    content: "chevron_right";
    font-family: 'Material Symbols Rounded';
    font-size: 1rem;
    vertical-align: middle;
    margin-left: 8px;
    color: var(--text-muted);
}
.crumb:last-child::after { display: none; }

/* Accordion Component */
.accordion-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.accordion-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--trans-fast);
}

.accordion-header {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background-color: var(--bg-surface);
    transition: background-color var(--trans-fast);
    font-weight: 600;
}

.accordion-header:active {
    background-color: var(--border-color);
}

/* --- Tiered Accordion Colors --- */
/* Level 1: Carreras */
.accordion-item.level-1 > .accordion-header {
    background-color: var(--primary);
    color: white;
}
.accordion-item.level-1 > .accordion-header .title .material-symbols-rounded,
.accordion-item.level-1 > .accordion-header .accordion-icon {
    color: white;
}
.accordion-item.level-1 > .accordion-header:active { background-color: var(--primary-dark); }

/* Level 2: Años */
.accordion-item.level-2 > .accordion-header {
    background-color: rgba(255, 107, 0, 0.15);
}
.accordion-item.level-2 > .accordion-header:active { background-color: rgba(255, 107, 0, 0.25); }

/* Level 3: Cuatrimestres */
.accordion-item.level-3 > .accordion-header {
    background-color: rgba(255, 107, 0, 0.05);
}
.accordion-item.level-3 > .accordion-header:active { background-color: rgba(255, 107, 0, 0.12); }


/* Dark Mode Overrides for Accordions */
[data-theme="dark"] .accordion-item.level-1 > .accordion-header {
    background-color: var(--primary);
}
[data-theme="dark"] .accordion-item.level-2 > .accordion-header {
    background-color: rgba(255, 107, 0, 0.25);
}
[data-theme="dark"] .accordion-item.level-2 > .accordion-header:active { background-color: rgba(255, 107, 0, 0.35); }

[data-theme="dark"] .accordion-item.level-3 > .accordion-header {
    background-color: rgba(255, 107, 0, 0.1);
}
[data-theme="dark"] .accordion-item.level-3 > .accordion-header:active { background-color: rgba(255, 107, 0, 0.18); }


.accordion-header .title {
    display: flex;
    align-items: center;
    gap: 8px;
}
.title .material-symbols-rounded {
    color: var(--primary);
}

.accordion-icon {
    transition: transform var(--trans-normal);
    color: var(--text-muted);
}

.accordion-item.active > .accordion-header > .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    background-color: var(--bg-color);
}

/* Set via JS or large px */
.accordion-item.active > .accordion-content {
    max-height: 3000px; /* high enough for internal contents */
}

.accordion-inner {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Child Accordions */
.accordion-inner > .accordion-item {
    margin-bottom: 0;
    box-shadow: none;
    border: 1px solid var(--border-color);
}

/* Subject Item */
.subject-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: transform var(--trans-fast), border-color var(--trans-fast), box-shadow var(--trans-fast);
    cursor: pointer;
}

.subject-item:active {
    transform: scale(0.98);
    border-color: var(--primary);
}

.subject-item .name { font-weight: 500; }
.subject-item .action { color: var(--primary); }

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    color: var(--text-muted);
}

.spinning {
    animation: spin 1s linear infinite;
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 12px;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

.no-results {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
}
.no-results .material-symbols-rounded {
    font-size: 48px;
    margin-bottom: 12px;
}

/* View: Nosotros */
.group-title {
    margin: 24px 0 16px;
    font-size: 1.25rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.card-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.member-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.member-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    flex-shrink: 0;
    object-fit: cover;
}

.member-info h4 { font-size: 1.1rem; margin-bottom: 4px; }
.member-info .role { 
    display: block; 
    font-size: 0.9rem; 
    font-weight: 600;
    color: var(--text-muted);
}
.member-info .role.primary-color { color: var(--primary); }
.member-info .career { 
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem; 
    color: var(--text-muted);
    margin-top: 4px;
}
.xs-icon { font-size: 14px; }

/* View: Contacto */
.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 16px;
    gap: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--trans-fast), border-color var(--trans-fast);
}

.contact-card:active {
    transform: scale(0.98);
    border-color: var(--primary);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-icon.insta { background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%); }
.contact-icon.email { background-color: #ea4335; }

.contact-text h4 { color: var(--text-main); margin-bottom: 2px;}
.contact-text p { color: var(--text-muted); font-size: 0.9rem;}
.contact-card .arrow { margin-left: auto; color: var(--text-muted); }

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--overlay-color);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--trans-fast);
    backdrop-filter: blur(2px);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-surface);
    width: 100%;
    max-width: 400px;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    transform: scale(0.9);
    transition: transform var(--trans-normal);
    overflow: hidden;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-body {
    padding: 20px;
}

.modal-body p {
    margin-bottom: 20px;
    color: var(--text-muted);
}

/* Floating Action Button (WhatsApp) */
.fab-whatsapp {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 64px;
    height: 64px;
    background-color: #25D366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
    z-index: 100;
    transition: transform var(--trans-normal), box-shadow var(--trans-fast);
}

.fab-whatsapp:hover, .fab-whatsapp:active {
    transform: scale(1.1) translateY(-4px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

.fab-whatsapp svg {
    width: 36px;
    height: 36px;
}

.center-content { text-align: center; }

/* Materia Detail & PDF Cards */
.grid-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 16px;
}

.pdf-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--trans-fast), box-shadow var(--trans-fast), border-color var(--trans-fast);
}

.pdf-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.pdf-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 1.5rem;
}

.pdf-icon .material-symbols-rounded {
    font-size: 32px;
}

.pdf-info h4 {
    font-size: 1.05rem;
    color: var(--text-main);
    line-height: 1.3;
}

.pdf-actions {
    display: flex;
    gap: 8px;
    margin-top: auto;
    padding-top: 8px;
}

.pdf-actions button, .pdf-actions a {
    flex: 1;
    padding: 10px;
    font-size: 0.95rem;
}

.btn-preview {
    flex: 2;
}

/* PDF Preview Modal */
.pdf-modal-content {
    max-width: 90vw;
    width: 100%;
    height: 90vh;
    display: flex;
    flex-direction: column;
}

.pdf-modal-body {
    flex: 1;
    padding: 0;
    position: relative;
    background-color: #f1f3f4;
}

[data-theme="dark"] .pdf-modal-body {
    background-color: #202124;
}

.iframe-loader {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-muted);
}

.iframe-container {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 2;
}

#pdf-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
}

.truncate-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 75%;
}

/* Responsive adjustments (Tablet/Desktop) */
@media (min-width: 768px) {
    .card-list { grid-template-columns: repeat(2, 1fr); }
    .grid-layout { grid-template-columns: repeat(2, 1fr); }
    .hero-section { padding: 12px 24px; }
    .hero-section h1 { font-size: 2.5rem; }
    .app-container {
        padding-top: calc(var(--header-height) + 20px);
    }
    .pdf-modal-content {
        max-width: 1200px;
    }
}

/* Footer Credits */
.app-footer {
    text-align: center;
    padding: 1rem 0 calc(var(--bottom-nav-height) + 1rem) 0;
    margin-top: auto;
}
.credits-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.5;
    margin: 0;
    font-weight: 500;
}

/* Foto Grupal Start Screen */
.foto-grupal {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 12px;
    display: block;
    margin: 1rem auto 0 auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}