/* ==========================================================================
   SeñasPro - Academia de Intérpretes LSM
   SISTEMA DE DISEÑO Y HOJA DE ESTILOS PREMIUM
   ========================================================================== */

/* Variables del Sistema de Diseño (Tahoe Light Glass Theme) */
:root {
    /* Colores Base */
    --color-obsidian: #f6f9fd;
    --color-obsidian-light: #ffffff;
    --color-obsidian-card: rgba(255, 255, 255, 0.72);
    --color-glass-bg: rgba(255, 255, 255, 0.58);
    --color-glass-border: rgba(255, 255, 255, 0.72);
    --color-glass-glow: rgba(0, 122, 255, 0.14);

    /* Acentos claros tipo sistema */
    --color-indigo-neon: #007aff;
    --color-purple-neon: #6e5df6;
    --color-cyan-neon: #00a7c7;
    --color-emerald-neon: #16a66a;
    --color-amber-neon: #c57900;
    --color-rose-neon: #d9355f;

    /* Texto */
    --color-text-primary: #172033;
    --color-text-secondary: #5f6f86;
    --color-text-muted: #7c8ca1;
    --color-text-white: #172033;

    /* Sombras y Filtros */
    --shadow-neon-indigo: 0 12px 30px rgba(0, 122, 255, 0.18);
    --shadow-neon-purple: 0 12px 30px rgba(110, 93, 246, 0.16);
    --shadow-neon-emerald: 0 12px 28px rgba(22, 166, 106, 0.15);
    --shadow-premium: 0 18px 42px rgba(73, 89, 124, 0.16);

    /* Bordes y Transiciones */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-quick: all 0.15s ease;
}

/* Restablecimiento de Estilos y Configuración Global */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background: #f8fbff;
    min-height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    background: linear-gradient(135deg, #f8fbff 0%, #eef7ff 44%, #f8f5ff 100%);
    color: var(--color-text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
}

.font-outfit {
    font-family: 'Outfit', sans-serif;
}

/* Scrollbar Personalizado */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.48);
}
::-webkit-scrollbar-thumb {
    background: rgba(124, 140, 161, 0.42);
    border: 2px solid rgba(255, 255, 255, 0.58);
    border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-indigo-neon);
}

/* ==========================================================================
   Estructura e Layout Principal (SPA)
   ========================================================================== */

.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

/* Sidebar Estilo Glassmorphism Premium */
.sidebar {
    background-color: rgba(9, 13, 22, 0.85);
    backdrop-filter: blur(25px);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: 30px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: var(--radius-md);
    padding: 8px;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.1);
}

.brand-name {
    display: flex;
    flex-direction: column;
}

.sidebar-nav {
    flex: 1;
    padding: 10px 16px;
    overflow-y: auto;
}

.sidebar-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.nav-link i {
    width: 20px;
    height: 20px;
    transition: var(--transition-quick);
}

.nav-link:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.03);
    padding-left: 22px;
}

.nav-link.active {
    color: var(--color-text-white);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
    border: 1px solid var(--color-glass-border);
    box-shadow:
        inset 0 0 12px rgba(99, 102, 241, 0.1),
        0 4px 20px rgba(0, 0, 0, 0.2);
    position: relative;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 4px;
    background: linear-gradient(to bottom, var(--color-indigo-neon), var(--color-purple-neon));
    border-radius: 0 4px 4px 0;
    box-shadow: var(--shadow-neon-indigo);
}

.nav-link.active i {
    color: var(--color-indigo-neon);
    filter: drop-shadow(0 0 5px rgba(99, 102, 241, 0.5));
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.15);
}

.user-quick-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar-container {
    position: relative;
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-indigo-neon) 0%, var(--color-purple-neon) 100%);
    color: var(--color-text-white);
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-neon-indigo);
}

.status-indicator {
    width: 10px;
    height: 10px;
    background-color: var(--color-emerald-neon);
    border: 2px solid var(--color-obsidian);
    border-radius: 50%;
    position: absolute;
    bottom: -2px;
    right: -2px;
    box-shadow: var(--shadow-neon-emerald);
}

.user-info {
    overflow: hidden;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-role {
    font-size: 11px;
    color: var(--color-indigo-neon);
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Área de Contenido */
.main-content {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: visible;
}

.main-header {
    padding: 24px 40px;
    background: rgba(9, 13, 22, 0.4);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 90;
    gap: 20px;
    flex: 0 0 auto;
}

.header-stats {
    display: flex;
    gap: 16px;
}

.header-welcome {
    min-width: 0;
}

.stat-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--color-obsidian-card);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-premium);
}

.stat-badge i {
    width: 18px;
    height: 18px;
}

.stat-details {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.stat-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.2;
    white-space: nowrap;
}

.stat-label {
    font-size: 10px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.content-body {
    padding: 40px;
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* ==========================================================================
   Componentes Estilizados Reutilizables (UI Elements)
   ========================================================================== */

/* Efecto Glass Card */
.glass-card {
    background: var(--color-obsidian-card);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 15px 35px -10px rgba(99, 102, 241, 0.1), var(--shadow-premium);
    transform: translateY(-4px);
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.4), transparent);
    transform: translateX(-100%);
    transition: var(--transition-smooth);
}

.glass-card:hover::before {
    transform: translateX(100%);
    transition: duration 1s;
}

/* Botones Premium */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-indigo-neon) 0%, var(--color-purple-neon) 100%);
    color: var(--color-text-white);
    box-shadow: var(--shadow-neon-indigo);
}

.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
    border: 1px solid var(--color-glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-accent {
    background: linear-gradient(135deg, var(--color-cyan-neon) 0%, var(--color-indigo-neon) 100%);
    color: var(--color-text-white);
}

.btn-accent:hover {
    filter: brightness(1.15);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-rose-neon) 0%, #db2777 100%);
    color: var(--color-text-white);
}

.btn-danger:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

.btn-disabled {
    background: rgba(255, 255, 255, 0.02) !important;
    color: var(--color-text-muted) !important;
    border: 1px solid rgba(255, 255, 255, 0.02) !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
    filter: none !important;
}

/* Insignias e Indicadores de Nivel */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
}

.badge-indigo {
    background: rgba(99, 102, 241, 0.12);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.badge-emerald {
    background: rgba(16, 185, 129, 0.12);
    color: #a7f3d0;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-amber {
    background: rgba(245, 158, 11, 0.12);
    color: #fde68a;
    border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-rose {
    background: rgba(244, 63, 94, 0.12);
    color: #fecdd3;
    border: 1px solid rgba(244, 63, 94, 0.25);
}

/* ==========================================================================
   VISTA: TABLERO (DASHBOARD)
   ========================================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.dashboard-main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Panel de Progreso Principal (Hero) */
.hero-card {
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.9) 0%, rgba(9, 13, 22, 0.95) 100%);
    position: relative;
}

.hero-layout {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.hero-text {
    flex: 1;
}

/* Gráfico Circular de Progreso */
.radial-progress-container {
    position: relative;
    width: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.radial-progress-svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.radial-progress-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.05);
    stroke-width: 10;
}

.radial-progress-bar {
    fill: none;
    stroke: url(#indigoGradient);
    stroke-width: 10;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.8s ease-in-out;
}

.radial-progress-text {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.radial-percentage {
    font-size: 26px;
    font-weight: 800;
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
}

.radial-label {
    font-size: 10px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Rejilla de Estadísticas Rápidas */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.mini-stat-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.mini-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-stat-icon.indigo {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-indigo-neon);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.mini-stat-icon.emerald {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-emerald-neon);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.mini-stat-icon.amber {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-amber-neon);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.mini-stat-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-white);
    line-height: 1.2;
}

.mini-stat-info p {
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* Actividades Recientes y Lista de Tareas */
.dashboard-sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.activity-item {
    display: flex;
    gap: 14px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.activity-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.activity-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 6px;
    position: relative;
}

.activity-dot.indigo {
    background-color: var(--color-indigo-neon);
    box-shadow: var(--shadow-neon-indigo);
}
.activity-dot.emerald {
    background-color: var(--color-emerald-neon);
    box-shadow: var(--shadow-neon-emerald);
}
.activity-dot.amber {
    background-color: var(--color-amber-neon);
}

.activity-details {
    flex: 1;
}

.activity-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.activity-time {
    font-size: 11px;
    color: var(--color-text-muted);
}

/* ==========================================================================
   VISTA: GIMNASIO DACTILAR (HAND GYM)
   ========================================================================== */

.gym-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.gym-workout-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Temporizador Inmersivo */
.workout-timer-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.timer-circle-container {
    position: relative;
    width: 220px;
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}

.timer-svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.timer-circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.03);
    stroke-width: 8;
}

.timer-circle-progress {
    fill: none;
    stroke: var(--color-indigo-neon);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
}

.timer-display {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timer-digits {
    font-size: 48px;
    font-weight: 800;
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
    line-height: 1;
    letter-spacing: 0;
}

.timer-phase {
    font-size: 12px;
    color: var(--color-indigo-neon);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    margin-top: 6px;
}

.timer-controls {
    display: flex;
    gap: 16px;
    width: 100%;
    justify-content: center;
}

/* Metrónomo Visual Rítmico */
.metronome-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
}

.metronome-visualizer {
    width: 100%;
    height: 80px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    margin: 20px 0;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metronome-arm {
    width: 4px;
    height: 60px;
    background: linear-gradient(to top, var(--color-indigo-neon), var(--color-purple-neon));
    border-radius: 2px;
    position: absolute;
    bottom: 10px;
    transform-origin: bottom center;
    transform: rotate(0deg);
    box-shadow: var(--shadow-neon-indigo);
}

@keyframes metronome-swing {
    0% { transform: rotate(-45deg); }
    50% { transform: rotate(45deg); }
    100% { transform: rotate(-45deg); }
}

.metronome-indicator {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-quick);
}

.metronome-indicator.flash {
    background-color: var(--color-cyan-neon);
    box-shadow: 0 0 15px var(--color-cyan-neon);
    transform: scale(1.2);
}

.metronome-speed-control {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.speed-slider {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-indigo-neon);
    box-shadow: var(--shadow-neon-indigo);
    cursor: pointer;
    transition: var(--transition-quick);
}

.speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Rutinas del Gimnasio */
.gym-routines-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.routine-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    gap: 14px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.routine-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateX(4px);
}

.routine-card.active {
    background: rgba(99, 102, 241, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: inset 0 0 15px rgba(99, 102, 241, 0.05);
}

.routine-card.premium-locked,
.course-unit-card.premium-locked {
    opacity: 0.72;
}

.routine-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.routine-card.active .routine-number {
    background: var(--color-indigo-neon);
    border-color: var(--color-indigo-neon);
    color: var(--color-text-white);
    box-shadow: var(--shadow-neon-indigo);
}

.routine-detail {
    flex: 1;
}

.routine-detail h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-white);
    line-height: 1.25;
}

.routine-detail p {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* ==========================================================================
   VISTA: ENTRENAMIENTO CEREBRAL (BRAIN GYM)
   ========================================================================== */

.brain-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.decalage-simulator-card {
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.7) 0%, rgba(9, 13, 22, 0.7) 100%);
}

.decalage-controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 24px 0;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 0.5px;
}

.form-select, .form-input {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: var(--color-text-primary);
    outline: none;
    font-family: inherit;
    transition: var(--transition-quick);
    width: 100%;
}

.form-select:focus, .form-input:focus {
    border-color: var(--color-indigo-neon);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

/* Pantalla del Simulador Decalage */
.simulator-screen {
    width: 100%;
    min-height: 250px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    margin-bottom: 24px;
    overflow: hidden;
}

.simulator-phrase-box {
    font-size: 28px;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    color: var(--color-text-white);
    margin-bottom: 20px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.3;
}

.decalage-progress-track {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    margin-bottom: 10px;
}

.decalage-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-indigo-neon), var(--color-purple-neon));
    border-radius: 4px;
    transition: width 0.1s linear;
}

.decalage-status-indicator {
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.decalage-status-indicator.wait {
    color: var(--color-amber-neon);
}

.decalage-status-indicator.sign {
    color: var(--color-emerald-neon);
    animation: text-pulse 1s infinite alternate;
}

@keyframes text-pulse {
    from { transform: scale(1); filter: brightness(1); }
    to { transform: scale(1.05); filter: brightness(1.2); }
}

/* Quiz de Anticipación Semántica */
.quiz-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.quiz-question-card {
    padding: 30px;
}

.quiz-progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    margin-bottom: 24px;
    overflow: hidden;
}

.quiz-progress-fill {
    height: 100%;
    background: var(--color-indigo-neon);
    width: 0%;
    transition: var(--transition-smooth);
}

.quiz-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.quiz-option {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 14px;
    text-align: left;
}

.quiz-option:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.quiz-option.correct {
    background: rgba(16, 185, 129, 0.08) !important;
    border-color: var(--color-emerald-neon) !important;
    color: #a7f3d0;
}

.quiz-option.incorrect {
    background: rgba(244, 63, 94, 0.08) !important;
    border-color: var(--color-rose-neon) !important;
    color: #fecdd3;
}

.option-letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.quiz-option.correct .option-letter {
    background: var(--color-emerald-neon);
    color: var(--color-text-white);
    border-color: var(--color-emerald-neon);
}

.quiz-option.incorrect .option-letter {
    background: var(--color-rose-neon);
    color: var(--color-text-white);
    border-color: var(--color-rose-neon);
}

/* ==========================================================================
   VISTA: CURSOS Y NIVELES (LEVELS)
   ========================================================================== */

.course-path {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-bottom: 28px;
}

.course-overview-card {
    padding: 22px;
}

.course-overview-main {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
}

.course-overview-copy h3 {
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
    font-size: 24px;
    font-weight: 800;
    line-height: 1.05;
    margin-top: 10px;
}

.course-overview-copy p {
    color: var(--color-text-secondary);
    font-size: 13px;
    line-height: 1.55;
    max-width: 760px;
    margin-top: 8px;
}

.course-progress-pill {
    min-width: 96px;
    border: 1px solid rgba(99, 102, 241, 0.24);
    background: rgba(99, 102, 241, 0.08);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    text-align: right;
}

.course-progress-pill span,
.course-level-progress span {
    color: #a5b4fc;
    display: block;
    font-family: 'Outfit', sans-serif;
    font-size: 24px;
    font-weight: 800;
    line-height: 1;
}

.course-progress-pill small,
.course-level-progress small {
    color: var(--color-text-muted);
    display: block;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-top: 5px;
    text-transform: uppercase;
}

.course-progress-track {
    background: rgba(0, 0, 0, 0.32);
    border: 1px solid var(--color-glass-border);
    border-radius: 999px;
    height: 12px;
    margin-top: 18px;
    overflow: hidden;
}

.course-progress-fill {
    background: linear-gradient(90deg, var(--color-indigo-neon), var(--color-cyan-neon));
    border-radius: inherit;
    height: 100%;
    transition: width 0.7s ease;
}

.course-level-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.course-level-chips span {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-glass-border);
    border-radius: 999px;
    color: var(--color-text-secondary);
    font-size: 11px;
    font-weight: 700;
    padding: 6px 10px;
}

.course-level-list {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.course-level-card {
    padding: 22px;
}

.course-level-card.locked {
    background: rgba(76, 29, 44, 0.1);
}

.course-level-card.foundations {
    border-color: rgba(6, 182, 212, 0.16);
}

.course-level-card.consecutive {
    border-color: rgba(99, 102, 241, 0.18);
}

.course-level-card.professional {
    border-color: rgba(245, 158, 11, 0.16);
}

.course-level-header {
    align-items: flex-start;
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    display: flex;
    gap: 18px;
    justify-content: space-between;
    padding-bottom: 16px;
}

.course-level-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.course-level-title {
    min-width: 0;
}

.course-level-title h4 {
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
    font-size: 20px;
    font-weight: 800;
    line-height: 1.15;
    margin-top: 10px;
}

.course-range {
    color: #a5b4fc;
    font-size: 12px;
    font-weight: 700;
    margin-top: 4px;
}

.course-level-progress {
    flex: 0 0 auto;
    text-align: right;
}

.course-level-description {
    color: var(--color-text-secondary);
    font-size: 13px;
    line-height: 1.55;
    margin: 16px 0 18px;
}

.course-unit-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.course-unit-card {
    align-items: center;
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    gap: 11px;
    min-height: 74px;
    padding: 11px;
    text-align: left;
    transition: var(--transition-quick);
    width: 100%;
}

.course-unit-card:hover,
.course-unit-card:focus-visible {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.34);
    outline: none;
    transform: translateY(-1px);
}

.course-unit-card:active {
    transform: scale(0.99);
}

.course-unit-card.completed {
    background: rgba(16, 185, 129, 0.065);
    border-color: rgba(16, 185, 129, 0.25);
}

.course-unit-card.locked {
    background: rgba(15, 23, 42, 0.22);
    border-color: rgba(15, 23, 42, 0.75);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.55;
}

.course-unit-number {
    align-items: center;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 50%;
    color: #c7d2fe;
    display: flex;
    flex: 0 0 38px;
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    font-weight: 800;
    height: 38px;
    justify-content: center;
    width: 38px;
}

.course-unit-card.completed .course-unit-number {
    background: rgba(16, 185, 129, 0.13);
    border-color: rgba(16, 185, 129, 0.3);
    color: #a7f3d0;
}

.course-unit-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.course-unit-copy strong {
    color: var(--color-text-primary);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.28;
}

.course-unit-copy small {
    color: var(--color-text-muted);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin-top: 5px;
    text-transform: uppercase;
}

.unit-modal-kicker {
    color: #a5b4fc;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.4px;
    margin-top: 6px;
    text-transform: uppercase;
}

.unit-visual-card {
    background:
        linear-gradient(145deg, rgba(15, 23, 42, 0.78), rgba(2, 6, 23, 0.72)),
        radial-gradient(circle at 20% 20%, rgba(6, 182, 212, 0.13), transparent 34%),
        radial-gradient(circle at 80% 12%, rgba(245, 158, 11, 0.1), transparent 30%);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 16px;
    margin: 0 0 18px;
    overflow: hidden;
    padding: 14px;
}

.unit-visual-header {
    align-items: center;
    display: flex;
    gap: 10px;
    justify-content: space-between;
    margin-bottom: 12px;
}

.unit-visual-header strong {
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    line-height: 1.15;
    text-align: right;
}

.unit-visual-eyebrow {
    align-items: center;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.24);
    border-radius: 999px;
    color: #c7d2fe;
    display: inline-flex;
    flex: 0 0 auto;
    gap: 6px;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.5px;
    padding: 6px 9px;
    text-transform: uppercase;
}

.unit-visual-stage {
    aspect-ratio: 16 / 9;
    background:
        linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px),
        rgba(0, 0, 0, 0.22);
    background-size: 28px 28px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    margin-bottom: 12px;
    overflow: hidden;
    position: relative;
}

.unit-visual-stage::before {
    border: 1px dashed rgba(99, 102, 241, 0.28);
    border-radius: 20px;
    bottom: 16%;
    content: '';
    left: 24%;
    position: absolute;
    right: 24%;
    top: 18%;
}

.visual-person {
    bottom: 13%;
    height: 66%;
    left: 50%;
    position: absolute;
    transform: translateX(-50%);
    width: 34%;
}

.visual-head {
    background: linear-gradient(180deg, #c7d2fe, #818cf8);
    border-radius: 50%;
    box-shadow: 0 0 18px rgba(99, 102, 241, 0.28);
    height: 24%;
    left: 50%;
    position: absolute;
    top: 0;
    transform: translateX(-50%);
    width: 28%;
}

.visual-torso {
    background: linear-gradient(180deg, rgba(6, 182, 212, 0.34), rgba(99, 102, 241, 0.22));
    border: 1px solid rgba(199, 210, 254, 0.18);
    border-radius: 999px 999px 18px 18px;
    height: 46%;
    left: 50%;
    position: absolute;
    top: 25%;
    transform: translateX(-50%);
    width: 42%;
}

.visual-arm,
.visual-hand,
.visual-space-zone,
.visual-path {
    position: absolute;
}

.visual-arm {
    background: rgba(199, 210, 254, 0.68);
    border-radius: 999px;
    height: 9%;
    top: 42%;
    transform-origin: center;
    width: 33%;
}

.visual-arm.left {
    left: 14%;
    transform: rotate(-24deg);
}

.visual-arm.right {
    right: 14%;
    transform: rotate(24deg);
}

.visual-hand {
    background: #f8fafc;
    border: 2px solid rgba(99, 102, 241, 0.55);
    border-radius: 48% 48% 42% 42%;
    box-shadow: 0 0 16px rgba(6, 182, 212, 0.28);
    height: 15%;
    top: 37%;
    width: 13%;
}

.visual-hand.left {
    left: 8%;
}

.visual-hand.right {
    right: 8%;
}

.visual-space-zone {
    border: 1px solid rgba(6, 182, 212, 0.42);
    border-radius: 16px;
    height: 38%;
    opacity: 0.6;
    top: 30%;
    width: 18%;
}

.zone-left {
    left: 9%;
}

.zone-right {
    right: 9%;
}

.visual-path {
    background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.95), transparent);
    border-radius: 999px;
    height: 3px;
    left: 25%;
    top: 55%;
    transform: rotate(-8deg);
    width: 50%;
}

.path-b {
    background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.9), transparent);
    top: 35%;
    transform: rotate(10deg);
}

.unit-visual-card p {
    color: var(--color-text-secondary);
    font-size: 12px;
    line-height: 1.45;
    margin: 0 0 12px;
}

.unit-visual-frames {
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.unit-visual-frames span {
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 10px;
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    font-size: 10px;
    font-weight: 700;
    gap: 4px;
    justify-content: center;
    min-height: 50px;
    padding: 8px 6px;
    text-align: center;
}

.unit-visual-frames b {
    align-items: center;
    background: rgba(99, 102, 241, 0.18);
    border-radius: 50%;
    color: #c7d2fe;
    display: inline-flex;
    font-size: 10px;
    height: 19px;
    justify-content: center;
    width: 19px;
}

.unit-visual-posture .visual-arm.left,
.unit-visual-posture .visual-arm.right {
    top: 48%;
    transform: rotate(0deg);
}

.unit-visual-hand .visual-hand.left {
    transform: translateY(-20%) scale(1.18);
}

.unit-visual-hand .visual-hand.right {
    transform: translateY(20%) scale(0.95);
}

.unit-visual-rhythm .visual-path {
    box-shadow: 0 0 0 8px rgba(245, 158, 11, 0.08), 0 0 0 18px rgba(245, 158, 11, 0.04);
}

.unit-visual-space .zone-left,
.unit-visual-space .zone-right,
.unit-visual-roles .zone-left,
.unit-visual-roles .zone-right {
    background: rgba(6, 182, 212, 0.08);
}

.unit-visual-delay .path-a,
.unit-visual-delay .path-b {
    left: 18%;
    width: 64%;
}

.unit-visual-delay .path-b {
    opacity: 0.35;
}

.unit-visual-map .visual-space-zone,
.unit-visual-sequence .visual-space-zone,
.unit-visual-review .visual-space-zone {
    border-radius: 8px;
    height: 22%;
    top: 20%;
}

.unit-visual-map .zone-left,
.unit-visual-sequence .zone-left,
.unit-visual-review .zone-left {
    left: 18%;
}

.unit-visual-map .zone-right,
.unit-visual-sequence .zone-right,
.unit-visual-review .zone-right {
    right: 18%;
}

.unit-visual-classifier .visual-hand.left,
.unit-visual-classifier .visual-hand.right {
    border-radius: 8px 18px 18px 8px;
    height: 12%;
    top: 45%;
    width: 18%;
}

.unit-visual-motion .visual-path {
    height: 5px;
    transform: rotate(-18deg);
}

.unit-visual-face .visual-head::after {
    background: rgba(15, 23, 42, 0.74);
    border-radius: 999px;
    content: '';
    height: 3px;
    left: 28%;
    position: absolute;
    top: 35%;
    transform: rotate(-8deg);
    width: 44%;
}

.unit-visual-ethics .visual-person {
    width: 26%;
}

.unit-visual-ethics .visual-space-zone {
    border-color: rgba(245, 158, 11, 0.42);
}

.unit-visual-body .visual-torso {
    box-shadow: inset 0 0 0 12px rgba(244, 63, 94, 0.08);
}

.unit-visual-body .visual-path {
    background: radial-gradient(circle, rgba(244, 63, 94, 0.95), rgba(244, 63, 94, 0.18) 55%, transparent 70%);
    height: 34px;
    left: 45%;
    top: 45%;
    transform: none;
    width: 34px;
}

.levels-timeline {
    display: flex;
    flex-direction: column;
    gap: 40px;
    position: relative;
    padding-left: 30px;
    margin-top: 20px;
}

.levels-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-indigo-neon), var(--color-purple-neon), rgba(255, 255, 255, 0.05));
}

.level-milestone {
    position: relative;
}

.level-milestone::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 24px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-obsidian);
    border: 4px solid var(--color-indigo-neon);
    box-shadow: var(--shadow-neon-indigo);
    z-index: 5;
    transition: var(--transition-smooth);
}

.level-milestone.locked::before {
    border-color: var(--color-text-muted);
    box-shadow: none;
}

.level-card {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 30px;
    align-items: center;
}

.level-card.locked {
    opacity: 0.6;
    pointer-events: none;
}

.level-card-left {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.level-lessons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 16px;
}

.lesson-badge {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.lesson-badge:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(99, 102, 241, 0.2);
}

.lesson-badge.completed i {
    color: var(--color-emerald-neon);
}

.lesson-badge.completed {
    border-color: rgba(16, 185, 129, 0.15);
    background: rgba(16, 185, 129, 0.02);
}

/* ==========================================================================
   VISTA: CERTIFICACIÓN (CERTIFICATION)
   ========================================================================== */

.cert-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.dilemma-card {
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.decision-result-box {
    margin-top: 20px;
    padding: 20px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-glass-border);
}

.decision-result-box.success {
    background: rgba(16, 185, 129, 0.05);
    border-color: rgba(16, 185, 129, 0.2);
}

.decision-result-box.warning {
    background: rgba(245, 158, 11, 0.05);
    border-color: rgba(245, 158, 11, 0.2);
}

/* ==========================================================================
   VISTA: SUSCRIPCIÓN Y PAYWALL
   ========================================================================== */

.subscription-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
    gap: 30px;
}

.auth-gate {
    display: flex;
    justify-content: center;
    min-height: calc(100vh - 210px);
}

.auth-gate-card {
    max-width: 820px;
    width: 100%;
}

.auth-gate-card h3 {
    color: var(--color-text-white);
    font-family: 'Outfit', sans-serif;
    font-size: 34px;
    font-weight: 800;
    line-height: 1.05;
    margin-top: 18px;
}

.auth-gate-card > p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-top: 14px;
}

.auth-benefits {
    display: grid;
    gap: 12px;
    margin: 24px 0;
}

.auth-benefits div {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 14px;
}

.auth-benefits strong {
    color: var(--color-text-white);
    display: block;
    font-size: 13px;
}

.auth-benefits span {
    color: var(--color-text-secondary);
    display: block;
    font-size: 12px;
    line-height: 1.5;
    margin-top: 4px;
}

.auth-gate-form {
    display: flex;
    gap: 12px;
    margin-top: 22px;
}

.auth-gate-form .form-input {
    flex: 1 1 240px;
}

.auth-gate-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.google-auth-button {
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(124, 140, 161, 0.24);
    color: var(--color-text-primary);
    font-weight: 800;
    width: 100%;
}

.google-auth-button:hover {
    background: #ffffff;
    border-color: rgba(0, 122, 255, 0.24);
    box-shadow: 0 16px 30px rgba(73, 89, 124, 0.14);
}

.google-mark {
    align-items: center;
    background: #ffffff;
    border: 1px solid rgba(124, 140, 161, 0.18);
    border-radius: 50%;
    color: #4285f4;
    display: inline-flex;
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 900;
    height: 26px;
    justify-content: center;
    width: 26px;
}

.auth-divider {
    align-items: center;
    color: var(--color-text-muted);
    display: flex;
    font-size: 11px;
    font-weight: 700;
    gap: 12px;
    letter-spacing: 0.4px;
    margin: 18px 0 0;
    text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
    background: rgba(124, 140, 161, 0.18);
    content: '';
    flex: 1;
    height: 1px;
}

.subscription-hero h3,
.subscription-panel h4,
.paywall-panel h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: var(--color-text-white);
    margin-top: 12px;
}

.subscription-hero p,
.paywall-panel p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-top: 12px;
}

.subscription-price,
.paywall-price {
    font-family: 'Outfit', sans-serif;
    color: var(--color-emerald-neon);
    font-size: 34px;
    font-weight: 800;
    margin-top: 24px;
}

.subscription-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.subscription-form,
.subscription-actions,
.paywall-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.subscription-form .form-input {
    flex: 1 1 220px;
}

.subscription-benefits {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.subscription-benefits div,
.subscription-note {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 14px;
}

.subscription-benefits strong {
    display: block;
    color: var(--color-text-white);
    font-size: 13px;
}

.subscription-benefits span,
.subscription-note,
.subscription-message {
    color: var(--color-text-secondary);
    font-size: 12px;
    line-height: 1.5;
}

.paywall-panel {
    padding: 8px;
}

.paywall-panel.compact {
    padding: 18px;
}

.paywall-panel ul {
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding-left: 18px;
    color: var(--color-text-secondary);
    font-size: 13px;
}

.course-access-note {
    margin-top: 8px;
    color: var(--color-emerald-neon) !important;
    font-weight: 700;
}

/* ==========================================================================
   VISTA: GLOSARIO Y ÉTICA (RESOURCES)
   ========================================================================== */

.resources-layout {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.flashcard-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    padding: 20px 0;
}

.flashcard {
    width: 420px;
    max-width: 100%;
    height: 300px;
    perspective: 1000px;
    cursor: pointer;
}

.flashcard-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-glass-border);
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow-premium);
}

.flashcard-front {
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.9) 0%, rgba(9, 13, 22, 0.95) 100%);
    color: var(--color-text-white);
}

.flashcard-back {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    color: var(--color-text-primary);
    transform: rotateY(180deg);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.15);
}

.flashcard-category {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-indigo-neon);
    font-weight: 700;
    margin-bottom: 12px;
}

.flashcard-front h4 {
    line-height: 1.12;
    overflow-wrap: anywhere;
}

.flashcard-back p {
    overflow-wrap: anywhere;
}

/* ==========================================================================
   Modales Estilizados
   ========================================================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(9, 13, 22, 0.8);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    width: 100%;
    max-width: 750px;
    max-height: 85vh;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition-smooth);
    padding: 40px;
}

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

.close-modal-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: var(--color-text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-quick);
}

.close-modal-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-text-white);
}

/* Gradients */
svg defs {
    position: absolute;
    width: 0;
    height: 0;
}

/* ==========================================================================
   Estilos de Navegación Móvil (Bottom Navigation Bar)
   ========================================================================== */

.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(9, 13, 22, 0.85);
    backdrop-filter: blur(25px);
    border-top: 1px solid var(--color-glass-border);
    display: none; /* Oculto por defecto en escritorio */
    justify-content: space-around;
    align-items: center;
    z-index: 200;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
    padding: 0 10px;
}

.mobile-nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 10px;
    font-weight: 500;
    transition: var(--transition-quick);
    flex: 1;
    height: 100%;
}

.mobile-nav-link i {
    width: 20px;
    height: 20px;
    transition: var(--transition-quick);
}

.mobile-nav-link.active {
    color: var(--color-indigo-neon);
}

.mobile-nav-link.active i {
    filter: drop-shadow(0 0 5px rgba(99, 102, 241, 0.5));
}

/* ==========================================================================
   Responsividad de Dispositivos (Media Queries)
   ========================================================================== */

@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .gym-layout {
        grid-template-columns: 1fr;
    }
    .cert-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    body {
        background-attachment: scroll;
        overscroll-behavior-y: auto;
        -webkit-overflow-scrolling: touch;
        touch-action: pan-y;
    }

    .app-container {
        grid-template-columns: 1fr;
        min-height: 100vh;
    }
    .sidebar {
        display: none !important; /* Esconder barra lateral en tablets/móviles */
    }
    .mobile-bottom-nav {
        display: flex; /* Mostrar barra de navegación inferior */
    }
    .main-content {
        height: auto;
        min-height: 100vh;
        overflow: visible;
        padding-bottom: 0;
        touch-action: pan-y;
    }
    .main-header {
        padding: 10px 16px;
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(162px, 52vw);
        align-items: center;
        justify-content: initial;
        gap: 8px;
        width: 100%;
        min-height: 44px;
        overflow: hidden;
    }
    .header-welcome {
        min-width: 0;
        overflow: hidden;
    }
    .main-header h1 {
        font-size: 15px !important;
        line-height: 1.15;
        margin: 0;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    #page-subtitle {
        display: none !important;
    }
    .header-stats {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
        max-width: none;
        gap: 4px;
        justify-content: flex-end;
        min-width: 0;
        overflow: visible;
    }
    .stat-badge {
        flex: initial;
        justify-content: center;
        min-width: 0;
        width: 100%;
        padding: 5px 4px;
        gap: 4px;
        border-radius: var(--radius-sm);
        box-shadow: none;
        overflow: hidden;
    }
    .stat-badge i {
        flex: 0 0 auto;
        width: 14px;
        height: 14px;
    }
    .stat-details {
        min-width: 0;
    }
    .stat-value {
        font-size: 10px;
        letter-spacing: 0;
        overflow: hidden;
        text-overflow: clip;
    }
    .stat-label {
        display: none !important; /* Esconder etiquetas para ahorrar espacio masivo en móvil */
    }
    .content-body {
        padding: 24px;
        padding-bottom: calc(104px + env(safe-area-inset-bottom));
    }
    .course-unit-grid {
        grid-template-columns: 1fr;
    }
    .stats-row {
        grid-template-columns: repeat(3, 1fr);
    }
    .subscription-layout {
        grid-template-columns: 1fr;
    }
    .quiz-options-grid {
        grid-template-columns: 1fr;
    }

    /* Decalage controls reflow */
    .decalage-controls {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 600px) {
    .main-header {
        grid-template-columns: minmax(0, 1fr) minmax(150px, 54vw);
        padding: 9px 12px;
        min-height: 43px;
    }

    .main-header h1 {
        font-size: 14px !important;
    }

    .stat-badge {
        padding: 5px 3px;
        gap: 3px;
    }

    .stat-badge i {
        width: 13px;
        height: 13px;
    }

    .stat-value {
        font-size: 9.5px;
    }

    .content-body {
        padding: 16px 12px;
        padding-bottom: calc(100px + env(safe-area-inset-bottom));
    }

    .course-path {
        gap: 16px;
        padding-bottom: 18px;
    }

    .course-overview-card,
    .course-level-card {
        border-radius: 14px;
        padding: 16px;
    }

    .course-overview-main,
    .course-level-header {
        gap: 12px;
    }

    .course-overview-copy h3 {
        font-size: 20px;
    }

    .course-overview-copy p,
    .course-level-description {
        font-size: 12px;
    }

    .course-progress-pill {
        min-width: 76px;
        padding: 8px;
    }

    .course-progress-pill span,
    .course-level-progress span {
        font-size: 19px;
    }

    .course-level-title h4 {
        font-size: 17px;
    }

    .course-level-description {
        margin: 12px 0 14px;
    }

    .course-unit-card {
        border-radius: 12px;
        min-height: 68px;
        padding: 10px;
    }

    .course-unit-number {
        flex-basis: 34px;
        height: 34px;
        width: 34px;
    }

    .unit-visual-card {
        border-radius: 14px;
        margin-bottom: 14px;
        padding: 12px;
    }

    .unit-visual-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .unit-visual-header strong {
        font-size: 14px;
        text-align: left;
    }

    .unit-visual-stage {
        aspect-ratio: 4 / 3;
    }

    .unit-visual-frames {
        gap: 6px;
    }

    .unit-visual-frames span {
        font-size: 9px;
        min-height: 48px;
        padding: 7px 4px;
    }

    .stats-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .hero-layout {
        flex-direction: column-reverse;
        gap: 20px;
        text-align: center;
    }

    .hero-text {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    /* Calibración de Flashcards para pantallas angostas */
    .flashcard {
        width: min(320px, 100%);
        height: 310px;
    }

    .flashcard-front, .flashcard-back {
        padding: 18px;
    }

    .flashcard-front h4 {
        font-size: 21px;
    }

    .flashcard-back p {
        font-size: 10.5px;
        line-height: 1.35;
    }

    /* Reducción proporcional del temporizador circular */
    .timer-circle-container {
        width: 180px;
        height: 180px;
        margin-bottom: 20px;
    }

    .timer-digits {
        font-size: 38px;
    }

    .gym-layout,
    .gym-workout-panel,
    .gym-routines-panel {
        min-width: 0;
    }

    .workout-timer-card {
        padding: 24px 14px;
    }

    .workout-timer-card h3 {
        font-size: 23px;
        line-height: 1.15;
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .workout-timer-card p {
        font-size: 16px;
        line-height: 1.45;
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .timer-controls {
        flex-wrap: wrap;
        gap: 10px;
    }

    .timer-controls .btn {
        flex: 1 1 120px;
        min-width: 0;
        padding: 12px 14px;
    }

    .gym-routines-panel > h4,
    .gym-routines-panel > p {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    /* Quiz options padding */
    .quiz-option {
        padding: 14px;
    }

    /* Lecciones grid */
    .level-lessons-grid {
        grid-template-columns: 1fr;
    }

    /* Modales móviles */
    .modal-content {
        padding: 24px 16px;
        width: 95%;
        max-height: 90vh;
    }

    .modal-content h2 {
        font-size: 22px;
    }

    .subscription-hero h3,
    .subscription-panel h4,
    .paywall-panel h3 {
        font-size: 23px;
    }

    .subscription-price,
    .paywall-price {
        font-size: 28px;
    }

    .subscription-form,
    .subscription-actions,
    .paywall-actions {
        flex-direction: column;
    }
}

/* ==========================================================================
   Tema Claro Amigable Inspirado en macOS Tahoe
   ========================================================================== */

body {
    color-scheme: light;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.18) 42%, rgba(255, 255, 255, 0));
}

.sidebar {
    background: rgba(255, 255, 255, 0.66);
    border-right: 1px solid rgba(255, 255, 255, 0.72);
    box-shadow: 18px 0 46px rgba(73, 89, 124, 0.12);
    backdrop-filter: blur(28px) saturate(1.35);
}

.sidebar-footer,
.main-header {
    background: rgba(255, 255, 255, 0.58);
    border-color: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(28px) saturate(1.35);
}

.main-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.74);
    box-shadow: 0 16px 34px rgba(73, 89, 124, 0.1);
}

.brand-icon,
.user-avatar,
.mini-stat-icon,
.course-unit-number,
.routine-number,
.option-letter,
.unit-visual-frames b {
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(0, 122, 255, 0.18);
    color: var(--color-indigo-neon);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 10px 24px rgba(0, 122, 255, 0.1);
}

.brand-name .text-white,
.brand-name .text-indigo-400,
.course-level-title h4,
.course-overview-copy h3,
.mini-stat-info h4,
.routine-detail h5,
.subscription-hero h3,
.subscription-panel h4,
.paywall-panel h3,
.radial-percentage,
.timer-digits,
.simulator-phrase-box,
.unit-visual-header strong,
.flashcard-front h4 {
    color: var(--color-text-primary) !important;
}

.brand-name .text-indigo-300,
.user-role,
.course-range,
.unit-modal-kicker,
.flashcard-category,
.timer-phase,
.course-progress-pill span,
.course-level-progress span {
    color: var(--color-indigo-neon) !important;
}

.nav-link {
    color: #5d6b80;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.62);
    color: var(--color-text-primary);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.82);
    border-color: rgba(0, 122, 255, 0.18);
    color: var(--color-text-primary);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.94), 0 12px 28px rgba(73, 89, 124, 0.13);
}

.nav-link.active::before {
    background: var(--color-indigo-neon);
    box-shadow: none;
}

.nav-link.active i,
.mobile-nav-link.active i {
    color: var(--color-indigo-neon);
    filter: none;
}

.glass-card,
.hero-card,
.decalage-simulator-card,
.subscription-panel,
.paywall-panel,
.modal-content {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.76);
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(28px) saturate(1.32);
}

.glass-card:hover,
.course-unit-card:hover,
.course-unit-card:focus-visible,
.routine-card:hover,
.lesson-badge:hover,
.quiz-option:hover {
    border-color: rgba(0, 122, 255, 0.26);
    box-shadow: 0 20px 46px rgba(73, 89, 124, 0.16);
}

.glass-card::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.92), transparent);
}

.stat-badge,
.course-progress-pill,
.course-level-chips span,
.course-unit-card,
.routine-card,
.lesson-badge,
.decision-result-box,
.subscription-benefits div,
.auth-benefits div,
.subscription-note,
.quiz-option,
.metronome-visualizer,
.simulator-screen,
.unit-visual-card,
.unit-visual-stage,
.unit-visual-frames span,
.flashcard-front,
.flashcard-back {
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(255, 255, 255, 0.72);
    color: var(--color-text-primary);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(20px) saturate(1.18);
}

.hero-card {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(239, 247, 255, 0.68)),
        linear-gradient(180deg, rgba(0, 122, 255, 0.07), rgba(22, 166, 106, 0.04));
}

.course-level-card.locked,
.course-unit-card.locked,
.course-unit-card.premium-locked,
.routine-card.premium-locked {
    background: rgba(238, 243, 250, 0.62);
    border-color: rgba(124, 140, 161, 0.22);
    color: var(--color-text-muted);
}

.course-level-card.foundations,
.course-level-card.consecutive,
.course-level-card.professional {
    border-color: rgba(0, 122, 255, 0.18);
}

.course-unit-card.completed,
.lesson-badge.completed,
.routine-card.active,
.decision-result-box.success,
.quiz-option.correct {
    background: rgba(226, 248, 239, 0.72) !important;
    border-color: rgba(22, 166, 106, 0.28) !important;
    color: #116246 !important;
}

.quiz-option.incorrect {
    background: rgba(255, 235, 240, 0.78) !important;
    border-color: rgba(217, 53, 95, 0.3) !important;
    color: #9b2444 !important;
}

.decision-result-box.warning {
    background: rgba(255, 247, 226, 0.78);
    border-color: rgba(197, 121, 0, 0.26);
}

.form-select,
.form-input {
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid rgba(124, 140, 161, 0.24);
    color: var(--color-text-primary);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.form-select:focus,
.form-input:focus {
    border-color: rgba(0, 122, 255, 0.52);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.12);
}

.btn {
    box-shadow: none;
}

.btn-primary,
.btn-accent {
    background: linear-gradient(135deg, #007aff 0%, #00a7c7 100%);
    color: #ffffff;
    box-shadow: 0 14px 28px rgba(0, 122, 255, 0.2);
}

.btn-primary:hover,
.btn-accent:hover {
    box-shadow: 0 18px 34px rgba(0, 122, 255, 0.26);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.64);
    border: 1px solid rgba(124, 140, 161, 0.24);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.86);
    border-color: rgba(0, 122, 255, 0.24);
}

.btn-danger {
    background: linear-gradient(135deg, #d9355f 0%, #ff6b8a 100%);
    color: #ffffff;
}

.btn-disabled {
    background: rgba(238, 243, 250, 0.72) !important;
    border-color: rgba(124, 140, 161, 0.18) !important;
}

.badge-indigo {
    background: rgba(0, 122, 255, 0.1);
    color: #005fc8;
    border-color: rgba(0, 122, 255, 0.2);
}

.badge-emerald {
    background: rgba(22, 166, 106, 0.1);
    color: #116246;
    border-color: rgba(22, 166, 106, 0.2);
}

.badge-amber {
    background: rgba(197, 121, 0, 0.11);
    color: #805000;
    border-color: rgba(197, 121, 0, 0.22);
}

.badge-rose {
    background: rgba(217, 53, 95, 0.1);
    color: #9b2444;
    border-color: rgba(217, 53, 95, 0.2);
}

.radial-progress-bg,
.timer-circle-bg {
    stroke: rgba(124, 140, 161, 0.18);
}

.radial-progress-bar,
.timer-circle-progress {
    filter: drop-shadow(0 8px 16px rgba(0, 122, 255, 0.2));
}

.course-progress-track,
.decalage-progress-track,
.quiz-progress-bar,
.speed-slider {
    background: rgba(124, 140, 161, 0.16);
    border-color: rgba(255, 255, 255, 0.62);
}

.course-progress-fill,
.decalage-progress-bar,
.quiz-progress-fill {
    background: linear-gradient(90deg, #007aff, #00a7c7);
}

.metronome-arm {
    background: linear-gradient(to top, #007aff, #00a7c7);
    box-shadow: 0 10px 24px rgba(0, 122, 255, 0.2);
}

.metronome-indicator {
    background: rgba(255, 255, 255, 0.7);
    border-color: rgba(124, 140, 161, 0.22);
}

.level-milestone::before {
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(0, 122, 255, 0.16);
}

.levels-timeline::before {
    background: linear-gradient(to bottom, #007aff, #00a7c7, rgba(124, 140, 161, 0.22));
}

.unit-visual-card {
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(239, 247, 255, 0.7)),
        linear-gradient(180deg, rgba(0, 122, 255, 0.06), rgba(22, 166, 106, 0.04));
}

.unit-visual-stage {
    background:
        linear-gradient(rgba(124, 140, 161, 0.09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 140, 161, 0.09) 1px, transparent 1px),
        rgba(255, 255, 255, 0.54);
    background-size: 28px 28px;
}

.visual-head {
    background: linear-gradient(180deg, #dcecff, #8bc7ff);
    box-shadow: 0 12px 26px rgba(0, 122, 255, 0.14);
}

.visual-torso {
    background: linear-gradient(180deg, rgba(0, 167, 199, 0.24), rgba(0, 122, 255, 0.16));
    border-color: rgba(0, 122, 255, 0.18);
}

.visual-arm {
    background: rgba(120, 184, 242, 0.52);
}

.visual-hand {
    background: #ffffff;
    border-color: rgba(0, 122, 255, 0.44);
    box-shadow: 0 12px 24px rgba(0, 122, 255, 0.12);
}

.unit-visual-face .visual-head::after {
    background: rgba(23, 32, 51, 0.6);
}

.modal-overlay {
    background: rgba(238, 243, 250, 0.54);
    backdrop-filter: blur(14px) saturate(1.2);
}

.close-modal-btn {
    background: rgba(255, 255, 255, 0.72);
    color: var(--color-text-secondary);
    border: 1px solid rgba(124, 140, 161, 0.16);
}

.close-modal-btn:hover {
    background: #ffffff;
    color: var(--color-text-primary);
}

.mobile-bottom-nav {
    background: rgba(255, 255, 255, 0.78);
    border-top: 1px solid rgba(255, 255, 255, 0.78);
    box-shadow: 0 -16px 36px rgba(73, 89, 124, 0.14);
    backdrop-filter: blur(28px) saturate(1.35);
    height: 72px;
    padding-bottom: 0;
    touch-action: manipulation;
}

.mobile-bottom-nav::after {
    background: rgba(255, 255, 255, 0.92);
    bottom: -32px;
    content: '';
    height: 32px;
    left: 0;
    pointer-events: none;
    position: absolute;
    right: 0;
}

.mobile-nav-link {
    color: #637287;
}

.mobile-nav-link.active {
    color: var(--color-indigo-neon);
}

@media (max-width: 900px) {
    .main-header {
        background: rgba(255, 255, 255, 0.76);
    }

    .stat-badge {
        background: rgba(255, 255, 255, 0.7);
        border-color: rgba(255, 255, 255, 0.74);
    }

    .auth-gate {
        min-height: auto;
    }
}

@media (max-width: 600px) {
    .auth-gate-card {
        padding: 22px 18px;
    }

    .auth-gate-card h3 {
        font-size: 28px;
    }

    .auth-gate-form,
    .auth-gate-actions {
        flex-direction: column;
    }
}