/* ==========================================================================
   SISTEMA DE DISEÑO & ESTILOS PREMIUM (VANILLA CSS COMPLETO)
   ========================================================================== */

/* Variables del Sistema */
:root {
    --primary: #3b82f6;         /* Blue 500 */
    --primary-hover: #2563eb;   /* Blue 600 */
    --primary-dark: #1e3a8a;    /* Blue 900 */
    --primary-light: #dbeafe;   /* Blue 100 */
    
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;
    
    --success-bg: #f0fdf4;
    --success-border: #86efac;
    --success-text: #166534;
    --success-icon: #16a34a;
    
    --danger-bg: #fef2f2;
    --danger-border: #fca5a5;
    --danger-text: #991b1b;
    --danger-icon: #dc2626;
    
    --warning-bg: #fff7ed;
    --warning-border: #fdba74;
    --warning-text: #9a3412;
    --warning-icon: #ea580c;
    
    --info-bg: #eff6ff;
    --info-border: #93c5fd;
    --info-text: #1e40af;
    --info-icon: #2563eb;

    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

/* Reset de Estilos Base */
*, ::before, ::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    text-size-adjust: 100%;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--slate-50);
    color: var(--slate-700);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Utilidad display: none */
.hidden {
    display: none !important;
}

/* Custom Scrollbars */
.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
.scrollbar-thin::-webkit-scrollbar-track {
    background: transparent;
}
.scrollbar-thin::-webkit-scrollbar-thumb {
    background: var(--slate-800);
    border-radius: 9999px;
}
.scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background: var(--slate-700);
}

/* ==========================================================================
   1. PORTADA HERO SECTION
   ========================================================================== */

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 1.5rem;
    overflow: hidden;
    z-index: 20;
    color: #ffffff;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.hero-section.fade-out {
    opacity: 0;
    transform: scale(0.98);
    pointer-events: none;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    transform: scale(1.05);
    z-index: 0;
    filter: brightness(0.95);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.45);
    z-index: 5;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.75rem;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.badge-academia {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #facc15; /* Yellow 400 */
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 2.25rem;
    line-height: 1.2;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.responsive-br {
    display: none;
}

@media (max-width: 640px) {
    .hero-title { font-size: 2.25rem; }
    .responsive-br { display: inline; }
}

@media (min-width: 640px) {
    .hero-title { font-size: 3.5rem; }
}

@media (min-width: 768px) {
    .hero-title { font-size: 4.5rem; }
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    max-width: 680px;
    color: var(--slate-200);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

@media (min-width: 640px) {
    .hero-subtitle { font-size: 1.35rem; }
}

@media (min-width: 768px) {
    .hero-subtitle { font-size: 1.6rem; }
}

.hero-cta-wrapper {
    margin-top: 0.5rem;
}

/* Glassmorphism Button */
.glass-btn {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 1rem 2.25rem;
    border-radius: 9999px;
    cursor: pointer;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background-color: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    display: inline-flex;
    align-items: center;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-btn:hover {
    background-color: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 12px 40px 0 rgba(59, 130, 246, 0.35);
    transform: translateY(-2px);
}

.glass-btn:active {
    transform: translateY(0);
}

.cta-arrow {
    margin-left: 0.5rem;
    animation: bounceSlow 2s infinite;
}

@keyframes bounceSlow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    z-index: 10;
}

.wave-svg {
    position: relative;
    display: block;
    width: 100%;
    height: 60px;
    color: var(--slate-50);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   2. DASHBOARD GENERAL LAYOUT
   ========================================================================== */

.dashboard-layout {
    display: flex;
    flex-direction: row;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    position: relative;
    z-index: 10;
    animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==========================================================================
   3. SIDEBAR DE NAVEGACIÓN
   ========================================================================== */

.sidebar-aside {
    width: 320px;
    background-color: var(--slate-900);
    border-right: 1px solid var(--slate-800);
    color: var(--slate-300);
    height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 50;
    flex-shrink: 0;
}

.logo-container {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-b: 1px solid var(--slate-800);
    border-bottom: 1px solid var(--slate-800);
}

.logo-header-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    text-decoration: none;
}

.logo-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 1.25rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.logo-avatar span {
    color: #facc15;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: #ffffff;
    font-size: 1.1rem;
    line-height: 1.15;
}

.logo-sub {
    font-size: 0.72rem;
    color: var(--slate-500);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
    margin-top: 2px;
}

.sidebar-close-button {
    display: none;
    background: transparent;
    border: none;
    color: var(--slate-400);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.2s;
}

.sidebar-close-button:hover {
    color: #ffffff;
}

.sidebar-menu {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem 1rem;
}

.menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.menu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--slate-400);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.menu-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.04);
}

.menu-link i {
    font-size: 1.1rem;
}

.menu-section-title {
    color: var(--slate-600);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0 1rem;
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
}

.topics-container {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.topic-menu-item {
    list-style: none;
}

.topic-menu-item > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 1rem;
    border-radius: 0.5rem;
    color: var(--slate-400);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.topic-menu-item > a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.04);
}

.topic-menu-item.active-topic > a {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.06);
    font-weight: 600;
    border-left: 3px solid var(--primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.topic-menu-item a span.bg-slate-800 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.72rem;
    background-color: var(--slate-800);
    color: var(--slate-400);
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
    transition: all 0.2s;
}

.topic-menu-item.active-topic a span.bg-slate-800 {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary-hover);
}

/* Sub-navegación dentro de temas */
.sub-nav {
    list-style: none;
    margin-left: 1.25rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--slate-800);
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
}

.sub-nav.active {
    display: flex;
}

.sub-nav-link {
    display: block;
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    color: var(--slate-500);
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sub-nav-link:hover {
    color: var(--slate-200);
    background-color: rgba(255, 255, 255, 0.03);
}

.sub-nav-link.active {
    color: var(--primary);
    background-color: rgba(59, 130, 246, 0.08);
    font-weight: 600;
}

.sidebar-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--slate-800);
    background-color: var(--slate-950);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--slate-500);
}

.footer-bold {
    font-weight: 600;
    color: var(--slate-400);
}

.footer-copyright {
    margin-top: 0.25rem;
    font-size: 0.65rem;
    color: var(--slate-600);
}

/* ==========================================================================
   4. ÁREA PRINCIPAL DE CONTENIDO (MAIN AREA)
   ========================================================================== */

.main-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
    background-color: var(--slate-50);
    position: relative;
}

/* Cabecera Superior Fija */
.sticky-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: 4rem;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

.sidebar-toggle-button {
    display: none;
    background: transparent;
    border: none;
    color: var(--slate-600);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    margin-left: -0.5rem;
    transition: color 0.2s;
}

.sidebar-toggle-button:hover {
    color: var(--slate-900);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
}

.badge-topic {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #e0e7ff;
    border: 1px solid #c7d2fe;
    color: var(--primary-hover);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.72rem;
    padding: 0.25rem 0.6rem;
    border-radius: 0.375rem;
    white-space: nowrap;
}

.header-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--slate-900);
    font-size: 0.95rem;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 320px;
}

@media (min-width: 640px) {
    .header-title { max-width: 450px; font-size: 1.05rem; }
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.academia-badge-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--slate-400);
    letter-spacing: 0.05em;
}

.back-landing-button {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--primary-hover);
    border: 1px solid var(--primary-light);
    background-color: rgba(59, 130, 246, 0.05);
    padding: 0.4rem 0.85rem;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.back-landing-button:hover {
    background-color: var(--primary-light);
    border-color: var(--primary);
}

.progress-bar-container {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: transparent;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--primary), #8b5cf6);
    transition: width 0.1s ease;
}

/* Zona de Lectura y Contenido Ergonómico */
.content-wrapper {
    flex-grow: 1;
    padding: 2rem 1rem;
    display: flex;
    justify-content: center;
}

@media (min-width: 768px) {
    .content-wrapper { padding: 3rem 2rem; }
}

.topic-article {
    width: 100%;
    max-width: 900px;
    background-color: #ffffff;
    border: 1px solid var(--slate-200)/70;
    border: 1px solid #f1f5f9;
    border-radius: 1.25rem;
    box-shadow: var(--shadow-sm);
    padding: 2rem 1.25rem;
    position: relative;
    overflow: hidden;
}

@media (min-width: 640px) {
    .topic-article { padding: 3rem 2.5rem; }
}

@media (min-width: 768px) {
    .topic-article { padding: 3.5rem 3.5rem; border-radius: 1.5rem; }
}

/* Pie de Contenido */
.footer-base {
    padding: 2rem 1.5rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--slate-400);
    border-top: 1px solid var(--slate-200);
    background-color: #ffffff;
}

.footer-brand {
    margin-top: 0.25rem;
    font-weight: 600;
    color: var(--primary);
}

/* ==========================================================================
   5. CONTROLES FLOTANTES Y RESPONSIVIDAD MÓVIL
   ========================================================================== */

/* Botón flotante Volver arriba */
.scroll-top-button {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    border-radius: 9999px;
    background-color: var(--slate-900);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
}

.scroll-top-button:hover {
    background-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.scroll-top-button:active {
    transform: translateY(0);
    scale: 0.95;
}

.scroll-top-button.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* Sidebar Overlay para móvil */
.sidebar-overlay-bg {
    position: fixed;
    inset: 0;
    background-color: rgba(2, 6, 23, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 45;
}

/* RESPONSIVIDAD PARA DISPOSITIVOS MÓVILES */
@media (max-width: 768px) {
    .dashboard-layout {
        flex-direction: column;
        height: 100vh;
        width: 100vw;
        overflow: hidden;
    }
    
    .sidebar-aside {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: 290px;
        height: 100vh;
        transform: translateX(-100%);
        box-shadow: none;
    }
    
    .sidebar-aside.show {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }
    
    .sidebar-close-button {
        display: block !important;
    }
    
    .sidebar-toggle-button {
        display: flex !important;
        position: fixed;
        top: 1rem;
        right: 1rem;
        z-index: 40; /* Floating above main content */
        background-color: var(--primary); /* Blue 500 */
        color: #ffffff;
        width: 2.75rem;
        height: 2.75rem;
        border-radius: 0.75rem;
        box-shadow: var(--shadow-lg);
        border: none;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem;
        cursor: pointer;
        transition: background-color 0.2s, transform 0.1s;
    }
    
    .sidebar-toggle-button:hover {
        background-color: var(--primary-hover);
        color: #ffffff;
    }
    
    .sidebar-toggle-button:active {
        transform: scale(0.95);
    }
    
    .sticky-header {
        display: none !important;
    }
    
    .content-wrapper {
        padding: 1.5rem 1rem !important;
    }
    
    .badge-topic {
        display: none;
    }
    
    .academia-badge-text {
        display: none;
    }
}

/* ==========================================================================
   6. JERARQUÍA DE LECTURA DENTRO DE LOS TEMAS
   ========================================================================== */

/* Outfit font titles inside article */
.font-outfit {
    font-family: 'Outfit', sans-serif;
}

.topic-article h1,
.topic-article h2,
.topic-article h3,
.topic-article h4 {
    font-family: 'Outfit', sans-serif;
    color: var(--slate-900);
    font-weight: 700;
    letter-spacing: -0.02em;
    scroll-margin-top: 5rem;
}

.topic-article h1 {
    font-size: 2rem;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--slate-900), var(--slate-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (min-width: 640px) {
    .topic-article h1 { font-size: 2.5rem; }
}

.topic-article h2 {
    font-size: 1.45rem;
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--slate-200);
    padding-bottom: 0.5rem;
    position: relative;
}

@media (min-width: 640px) {
    .topic-article h2 { font-size: 1.65rem; }
}

.topic-article h2::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--primary);
}

.topic-article h3 {
    font-size: 1.2rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-hover);
}

.topic-article p {
    margin-bottom: 1.25rem;
    font-size: 1.025rem;
    color: var(--slate-600);
    text-align: justify;
}

.topic-article ul,
.topic-article ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--slate-600);
}

.topic-article li {
    margin-bottom: 0.5rem;
    font-size: 1.025rem;
}

.topic-article strong {
    color: var(--slate-900);
    font-weight: 600;
}

/* ==========================================================================
   7. CAJAS SEMÁNTICAS (DEFINICIONES, TEOREMAS, EJEMPLOS, PROPIEDADES)
   ========================================================================== */

.box {
    padding: 1.5rem;
    margin: 2rem 0;
    border-left: 4px solid;
    border-radius: 0.75rem;
    background-color: #ffffff;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

@media (min-width: 640px) {
    .box { padding: 1.75rem; }
}

.box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.box-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

/* Cajas Semánticas Temáticas */
.box.definition {
    background-color: var(--success-bg);
    border-color: var(--success-border);
    color: var(--slate-700);
}
.box.definition .box-title { color: var(--success-text); }
.box.definition .box-title i { color: var(--success-icon); }

.box.theorem {
    background-color: var(--danger-bg);
    border-color: var(--danger-border);
    color: var(--slate-700);
}
.box.theorem .box-title { color: var(--danger-text); }
.box.theorem .box-title i { color: var(--danger-icon); }

.box.property {
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
    color: var(--slate-700);
}
.box.property .box-title { color: var(--warning-text); }
.box.property .box-title i { color: var(--warning-icon); }

.box.example {
    background-color: var(--info-bg);
    border-color: var(--info-border);
    color: var(--slate-700);
}
.box.example .box-title { color: var(--info-text); }
.box.example .box-title i { color: var(--info-icon); }

/* ==========================================================================
   8. ELEMENTOS INTERACTIVOS (DESPLEGABLES Y TANGENTES)
   ========================================================================== */

/* Botón Desplegable (Proofs / Soluciones) */
.proof-btn {
    padding: 0.55rem 1.15rem;
    font-size: 0.825rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    width: fit-content;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--slate-200);
    background-color: #ffffff;
    color: var(--slate-700);
    box-shadow: var(--shadow-sm);
    user-select: none;
}

.proof-btn:hover {
    background-color: var(--slate-50);
    border-color: var(--slate-300);
    transform: translateY(-1px);
}

.proof-content {
    display: none;
    margin-top: 1rem;
    padding: 1.5rem;
    background-color: #ffffff;
    border-radius: 0.5rem;
    border: 1px dashed var(--slate-200);
    font-size: 0.95rem;
    animation: slideDownFadeIn 0.3s ease-out;
    text-align: justify;
}

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

/* Colores Dinámicos en Desplegables de Cajas */
.box.definition .proof-btn {
    border-color: var(--success-border);
    color: var(--success-text);
    background-color: #dcfce7;
}
.box.definition .proof-btn:hover {
    background-color: var(--success-icon);
    color: #ffffff;
}

.box.theorem .proof-btn {
    border-color: var(--danger-border);
    color: var(--danger-text);
    background-color: #fee2e2;
}
.box.theorem .proof-btn:hover {
    background-color: var(--danger-icon);
    color: #ffffff;
}

.box.property .proof-btn {
    border-color: var(--warning-border);
    color: var(--warning-text);
    background-color: #ffedd5;
}
.box.property .proof-btn:hover {
    background-color: var(--warning-icon);
    color: #ffffff;
}

.box.example .proof-btn {
    border-color: var(--info-border);
    color: var(--info-text);
    background-color: #dbeafe;
}
.box.example .proof-btn:hover {
    background-color: var(--info-icon);
    color: #ffffff;
}

/* Hilo Conductor (Transition Box) */
.transition-container {
    display: flex;
    justify-content: flex-start;
    margin: 2rem 0;
    width: 100%;
}

.transition-box {
    background: #ffffff;
    border: 1px solid var(--slate-200);
    border-left: 6px solid var(--primary);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    width: 100%;
}

.transition-btn {
    background-color: #ffffff;
    color: var(--slate-800);
    border: 1px solid var(--slate-200);
    padding: 0.45rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    font-family: 'Outfit', sans-serif;
    user-select: none;
}

.transition-btn:hover {
    background-color: var(--slate-50);
    border-color: var(--slate-300);
    transform: translateY(-1px);
}

.transition-content {
    display: none;
    margin-top: 1.25rem;
    font-size: 0.98rem;
    color: var(--slate-600);
    text-align: justify;
    border-top: 1px solid var(--slate-100);
    padding-top: 1rem;
    animation: slideDownFadeIn 0.3s ease-out;
}

/* ==========================================================================
   9. TABLAS PREMIUM RESPONSIVAS
   ========================================================================== */

/* Contenedor de Scroll para Tablas */
.table-responsive,
#content-container .table-responsive,
#content-container table {
    width: 100%;
    overflow-x: auto;
    margin-bottom: 2rem;
    display: block;
}

#content-container table {
    width: 100%;
    min-width: 500px;
    border-collapse: collapse;
    background: #ffffff;
    box-shadow: var(--shadow-sm);
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--slate-200);
    display: table;
}

#content-container th,
#content-container td {
    padding: 0.85rem 1.25rem;
    text-align: center;
    font-size: 0.925rem;
    border-bottom: 1px solid var(--slate-100);
}

#content-container th {
    background-color: var(--slate-800);
    color: #ffffff;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--slate-900);
}

#content-container tr:last-child td {
    border-bottom: none;
}

#content-container tr:nth-child(even) {
    background-color: rgba(248, 250, 252, 0.6);
}

#content-container tr:hover td {
    background-color: rgba(59, 130, 246, 0.02);
}

/* ==========================================================================
   10. MOTOR MATEMÁTICO & GRÁFICOS INTERACTIVOS
   ========================================================================== */

/* MathJax Styles */
.mjx-chtml, .MathJax {
    outline: none;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

/* Contenedores de Simulación SVG */
.diagram-container {
    text-align: center;
    margin: 2rem 0;
    background: #ffffff;
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--slate-200);
}

.diagram-caption {
    font-size: 0.88rem;
    color: var(--slate-500);
    margin-top: 12px;
    font-style: italic;
    font-weight: 500;
}

.simulation-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--slate-50);
    border-radius: 0.75rem;
    border: 1px dashed var(--slate-300);
    width: 100%;
}

.slider-group {
    display: flex;
    gap: 1.5rem;
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
}

.slider-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    min-width: 180px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--slate-700);
}

.slider-container input[type=range] {
    width: 100%;
    cursor: pointer;
    accent-color: var(--primary);
}

svg.sim-svg {
    width: 100%;
    height: auto;
    max-height: 400px;
    background-color: #ffffff;
    border-radius: 0.5rem;
    border: 1px solid var(--slate-200);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

/* Multiplicación de Matrices Interactiva (Tema 2) */
.matrix-grid-interactive {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.matrix-view {
    display: inline-block;
    border-left: 3px solid var(--slate-800);
    border-right: 3px solid var(--slate-800);
    padding: 0.6rem 1rem;
    border-radius: 12px;
    background: #ffffff;
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.matrix-row-int {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin: 0.5rem 0;
}

.matrix-cell-int {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--slate-200);
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.25s ease;
    cursor: pointer;
    user-select: none;
    background-color: #ffffff;
}

.matrix-cell-int:hover {
    background-color: var(--slate-50);
    border-color: var(--slate-400);
    transform: scale(1.05);
}

.matrix-cell-int.highlight-row {
    background-color: #ffedd5;
    border-color: #ea580c;
    color: #9a3412;
}

.matrix-cell-int.highlight-col {
    background-color: #fef08a;
    border-color: #ca8a04;
    color: #854d0e;
}

.matrix-cell-int.highlight-res {
    background-color: #dcfce7;
    border-color: #16a34a;
    color: #166534;
    font-weight: 900;
}

#sim2-arithmetic-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    text-align: center;
    margin-top: 1rem;
    color: var(--slate-800);
    padding: 0.75rem;
    background: #ffffff;
    border-radius: 0.5rem;
    border: 1px solid var(--slate-200);
    min-height: 54px;
}

/* Ejercicios y Acciones Extras */
.grid-ejercicios {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.added-value {
    background: linear-gradient(to right, var(--slate-50), #ffffff);
    border: 1px solid var(--slate-200);
    border-top: 4px solid var(--primary);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-top: 2rem;
}

.control-btns {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.control-btns button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 0.375rem;
    cursor: pointer;
    background-color: var(--slate-800);
    color: #ffffff;
    border: none;
    transition: all 0.2s;
}

.control-btns button:hover {
    background-color: var(--slate-700);
}

/* ==========================================================================
   11. CONTENEDOR DE AULAS INTERACTIVAS (CLASSROOM SHOWCASE)
   ========================================================================== */

.classroom-showcase {
    margin-bottom: 2.5rem;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--slate-200);
    background-color: var(--slate-900);
    position: relative;
    width: 100%;
}

.classroom-showcase-container {
    height: 16rem;
    width: 100%;
    position: relative;
    overflow: hidden;
}

@media (min-width: 768px) {
    .classroom-showcase-container {
        height: 20rem;
    }
}

.classroom-showcase-img {
    object-fit: cover;
    width: 100%;
    height: 100%;
    transform: scale(1);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.85;
}

.classroom-showcase:hover .classroom-showcase-img {
    transform: scale(1.03);
}

.classroom-showcase-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, var(--slate-950) 0%, rgba(15, 23, 42, 0.35) 60%, transparent 100%);
    pointer-events: none;
}

.classroom-showcase-content {
    position: absolute;
    bottom: 0;
    left: 0;
    padding: 1.25rem;
    width: 100%;
    box-sizing: border-box;
    z-index: 10;
}

@media (min-width: 768px) {
    .classroom-showcase-content {
        padding: 1.75rem 2rem;
    }
}

.classroom-showcase-badge {
    background-color: var(--primary);
    color: #ffffff;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    margin-bottom: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    box-shadow: var(--shadow-sm);
}

.classroom-showcase-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.35rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

@media (min-width: 768px) {
    .classroom-showcase-title {
        font-size: 1.65rem;
    }
}

.classroom-showcase-desc {
    color: var(--slate-200);
    font-size: 0.825rem;
    max-width: 56rem;
    line-height: 1.4;
    text-shadow: 0 1px 2px rgba(0,0,0,0.4);
    font-weight: 500;
}

@media (min-width: 768px) {
    .classroom-showcase-desc {
        font-size: 0.875rem;
    }
}