/* ==========================================================================
   SONGTENNO DASHBOARD - DISEÑO CLARO PREMIUM MOCKUP STYLE (perfil.css)
   ========================================================================== */

:root {
    --bg-page: #050714;
    /* Fondo oscuro principal */
    --bg-card: rgba(15, 23, 42, 0.65);
    /* Tarjetas oscuras translúcidas */
    --border-card: rgba(255, 255, 255, 0.08);
    /* Bordes de cristal */
    --border-card-hover: rgba(255, 255, 255, 0.15);

    /* Colores Temáticos del Dojo */
    --color-primary: #f8fafc;
    /* Blanco */
    --color-accent: #00f2fe;
    /* Cian */
    --color-green: #10b981;
    --color-green-soft: rgba(16, 185, 129, 0.1);
    --color-cyan: #00f2fe;
    --color-orange: #f97316;
    --color-orange-soft: rgba(249, 115, 22, 0.1);
    --color-gold: #f59e0b;

    /* Textos */
    --text-title: #f8fafc;
    --text-body: #cbd5e1;
    --text-muted: #94a3b8;
    --text-light: #64748b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-page);
    color: var(--text-body);
    min-height: 100vh;
    padding-bottom: 5rem;
    line-height: 1.6;
}

h1,
h2,
h3,
h4,
.stat-value,
.user-name {
    font-family: 'Outfit', 'Inter', sans-serif;
    color: var(--text-title);
    font-weight: 750;
}

/* --- NAV BAR --- */
.nav-profile {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(5, 7, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-card);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.logo-text {
    font-weight: 900;
    font-size: 1.15rem;
    letter-spacing: 1.5px;
    background: linear-gradient(90deg, #d946ef, var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-menu-dropdown-container {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.btn-profile-avatar-menu {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-profile-avatar-menu:hover {
    transform: scale(1.08);
}

.user-avatar-nav {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.user-avatar-nav-fallback {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #d946ef);
    color: #ffffff;
    font-weight: 800;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.profile-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 165px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6), 0 0 15px rgba(0, 242, 254, 0.15);
    z-index: 1000;
}

.profile-dropdown-menu.open {
    display: flex;
    flex-direction: column;
    animation: dropdownFadeIn 0.2s ease;
}

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

.dropdown-item-logout {
    background: rgba(239, 68, 68, 0.08);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    padding: 0.65rem 1rem;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    transition: all 0.2s ease;
}

.dropdown-item-logout:hover {
    background: rgba(239, 68, 68, 0.25);
    border-color: #ef4444;
    color: #ffffff;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
}

.btn-nav-back {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-nav-back:hover {
    color: var(--color-accent);
}

.btn-logout {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-logout:hover {
    background: #ef4444;
    color: #050714;
    border-color: #ef4444;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

/* --- BANNER DE DEMOSTRACIÓN --- */
.demo-banner {
    background: linear-gradient(90deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid #bfdbfe;
    border-radius: 16px;
    padding: 1rem 1.5rem;
    max-width: 1250px;
    margin: 1.5rem auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.05);
    animation: fadeInDown 0.4s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.banner-icon {
    font-size: 1.25rem;
}

.banner-text {
    font-size: 0.85rem;
    color: #1e40af;
    line-height: 1.5;
}

.btn-banner-close {
    background: rgba(29, 78, 216, 0.1);
    border: 1px solid rgba(29, 78, 216, 0.3);
    color: var(--color-accent);
    padding: 0.45rem 0.95rem;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-banner-close:hover {
    background: #1d4ed8;
    color: #050714;
    border-color: #1d4ed8;
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.15);
}

/* --- CONTENEDOR PRINCIPAL --- */
.dashboard-container {
    max-width: 1250px;
    margin: 2rem auto 0;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* --- GLASS CARD (BLANCO PREMIUM) --- */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 24px;
    padding: 1.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.02), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    transition: border-color 0.25s, box-shadow 0.25s;
}

.glass-card:hover {
    border-color: var(--border-card-hover);
    box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.04), 0 10px 15px -6px rgba(0, 0, 0, 0.04);
}

/* --- CABECERA PREMIUM REDISEÑADA --- */
.user-hero-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
}

.user-hero-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.avatar-wrapper {
    position: relative;
    width: 72px;
    height: 72px;
    flex-shrink: 0;
}

.user-avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    object-fit: cover;
}

.avatar-fallback {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), #4f46e5);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.user-name-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.user-name {
    font-size: 1.8rem;
    color: var(--text-title);
    font-weight: 750;
    letter-spacing: -0.5px;
}

.user-motivation {
    font-size: 0.92rem;
    color: var(--text-body);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.streak-badge {
    background: var(--color-orange-soft);
    color: var(--color-orange);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-weight: 750;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.demographics-pill-row {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.35rem;
    flex-wrap: wrap;
}

.demo-pill {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-body);
    font-size: 0.75rem;
    font-weight: 750;
    padding: 0.25rem 0.65rem;
    border-radius: 50px;
    border: 1px solid var(--border-card);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.header-right-box {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Botón de Demostración */
.btn-toggle-sim {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-card);
    color: var(--text-body);
    padding: 0.55rem 1.1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 750;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s, border-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-toggle-sim:hover {
    transform: translateY(-2px);
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
}

.btn-toggle-sim.active {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #ffffff;
    border-color: #10b981;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-toggle-sim.active:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}

.sub-badge-box {
    border: 1px solid var(--border-card);
    background: var(--bg-card);
    border-radius: 16px;
    padding: 0.65rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 190px;
}

.sub-badge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.sub-badge-title {
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-sub {
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    border: 1px solid transparent;
}

.badge-sub.lifetime {
    background: #fef3c7;
    border-color: #fde68a;
    color: #d97706;
}

.badge-sub.premium {
    background: #dbeafe;
    border-color: #bfdbfe;
    color: #2563eb;
}

.badge-sub.trial {
    background: #d1fae5;
    border-color: #a7f3d0;
    color: #059669;
}

.badge-sub.free {
    background: #f1f5f9;
    border-color: #e2e8f0;
    color: #475569;
}

.sub-badge-details {
    display: flex;
    flex-direction: column;
}

.sub-status-desc {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--text-title);
}

.sub-expiry {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* --- GRID DE TRES TARJETAS MÉTRICAS --- */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.metric-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
}

.metric-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.metric-title {
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.metric-value-row {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.metric-val-icon {
    font-size: 1.3rem;
    color: var(--text-muted);
}

.metric-val {
    font-size: 2.2rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -1px;
}

.metric-unit {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-muted);
}

.metric-sub {
    font-size: 0.78rem;
    color: var(--text-light);
    font-weight: 600;
}

.metric-visual-box {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.metric-big-icon {
    font-size: 2rem;
    color: var(--color-cyan);
    background: #ecfeff;
    padding: 0.6rem;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border: 1px solid #cffafe;
}

/* Anillos circulares de progreso SVG */
.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring__circle {
    transition: stroke-dashoffset 0.35s;
    transform-origin: 50% 50%;
}

.progress-percent-label {
    position: absolute;
    font-size: 0.75rem;
    font-weight: 850;
    color: var(--text-title);
}

/* Donut Chart de Tarjetas Repasadas (Aciertos/Fallos) */
.donut-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.progress-ring-donut {
    transform: rotate(-90deg);
    flex-shrink: 0;
}

.donut-legend {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.65rem;
    font-weight: 750;
    color: var(--text-muted);
}

.legend-bullet-row {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.bullet-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.bullet-dot.green {
    background-color: var(--color-green);
}

.bullet-dot.orange {
    background-color: var(--color-orange);
}

/* --- DISEÑO CENTRAL DE DOS COLUMNAS (MOCKUP STYLE) --- */
.grid-middle-row {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 1.5rem;
}

.full-width-chart {
    width: 100%;
}

/* --- TARJETA DE HEATMAP --- */
.heatmap-card {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-width: 0;
}

.heatmap-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 0.85rem;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 850;
    color: var(--text-title);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.card-title::before {
    content: '';
    width: 4px;
    height: 14px;
    background-color: var(--color-accent);
    border-radius: 20px;
    display: inline-block;
}

.heatmap-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-right: auto;
    padding-left: 0.5rem;
}

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.72rem;
    color: var(--text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.legend-square {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.legend-square.green {
    background-color: var(--color-green);
}

.legend-square.purple {
    background-color: #7e22ce;
}


.heatmap-outer-wrapper {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.heatmap-inner-wrapper {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: max-content;
}

.months-labels {
    display: grid;
    font-size: 0.65rem;
    color: var(--text-light);
    font-weight: 700;
    height: 16px;
    line-height: 16px;
    padding-left: 31px;
    /* Desfase exacto de las etiquetas de días de la semana */
}

.month-label {
    text-align: left;
    white-space: nowrap;
}

.heatmap-bottom-row {
    display: flex;
    align-items: flex-start;
}

.days-labels {
    display: grid;
    grid-template-rows: repeat(7, 12px);
    gap: 3px;
    font-size: 0.65rem;
    color: var(--text-light);
    font-weight: 700;
    padding-right: 8px;
    text-align: right;
    justify-content: flex-end;
}

.day-label-item {
    height: 12px;
    display: flex;
    align-items: center;
}

.heatmap-cells-grid {
    display: grid;
    grid-auto-flow: column;
    grid-template-rows: repeat(7, 12px);
    gap: 3px;
}

/* Celdas del Heatmap (Gris Sólido de GitHub por defecto) */
.heatmap-cell {
    width: 12px;
    height: 12px;
    background-color: #ebedf0;
    /* Gris Github muy visible en fondo blanco */
    border: 1px solid rgba(0, 0, 0, 0.02);
    border-radius: 2px;
    cursor: pointer;
    box-sizing: border-box;
    transition: transform 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.15s;
}

.heatmap-cell-empty {
    width: 12px;
    height: 12px;
    background-color: transparent;
    border: none;
    pointer-events: none;
}

.heatmap-cell:hover {
    transform: scale(1.35);
    z-index: 10;
    box-shadow: 0 4px 8px rgba(15, 23, 42, 0.15);
    border-color: rgba(15, 23, 42, 0.25) !important;
}

/* Escala de Repaso (Verdes de GitHub) */
.heatmap-cell.cards-lvl-1 {
    background-color: #d2f4d9 !important;
}

.heatmap-cell.cards-lvl-2 {
    background-color: #9be9a8 !important;
}

.heatmap-cell.cards-lvl-3 {
    background-color: #40c463 !important;
}

.heatmap-cell.cards-lvl-4 {
    background-color: #216e39 !important;
}

/* Escala de Lectura (Púrpuras) */
.heatmap-cell.read-lvl-1 {
    background-color: #f3e8ff !important;
}

.heatmap-cell.read-lvl-2 {
    background-color: #e9d5ff !important;
}

.heatmap-cell.read-lvl-3 {
    background-color: #c084fc !important;
}

.heatmap-cell.read-lvl-4 {
    background-color: #7e22ce !important;
}

/* Tenno Supremo - Light Mode default (White cell with black border & shadow) */
.heatmap-cell.tenno-supremo,
.legend-square.tenno-supremo {
    background-color: #ffffff !important;
    border: 1.5px solid rgba(15, 23, 42, 0.95) !important;
    box-shadow: 0 0 5px rgba(15, 23, 42, 0.5) !important;
}

/* Tenno Supremo - Dark Mode (Black cell with white border & shadow) */
@media (prefers-color-scheme: dark) {
    .heatmap-cell.tenno-supremo,
    .legend-square.tenno-supremo {
        background-color: #000000 !important;
        border: 1.5px solid rgba(255, 255, 255, 0.95) !important;
        box-shadow: 0 0 5px rgba(255, 255, 255, 0.6) !important;
    }
}

/* --- TOOLTIP FLOTANTE PREMIUM CON FLECHA --- */
.heatmap-tooltip {
    position: absolute;
    background: #1e293b;
    /* Slate 800 */
    color: #ffffff;
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: opacity 0.1s, transform 0.1s;
    white-space: nowrap;
}

.heatmap-tooltip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0;
    border-style: solid;
    border-color: #1e293b transparent transparent;
    display: block;
    width: 0;
}

.heatmap-tooltip.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* --- TARJETA DE GRÁFICO (CHART CARD) --- */
.chart-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 230px;
}

/* --- RESPONSIVIDAD --- */
@media (max-width: 1024px) {
    .grid-middle-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .metrics-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .user-hero-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 1.25rem 1rem;
    }

    .header-right-box {
        width: 100%;
        justify-content: space-between;
    }

    .dashboard-container {
        padding: 0 1rem;
        margin: 1rem auto;
    }

    .glass-card {
        padding: 1.25rem;
        border-radius: 16px;
    }

    .vocab-header-tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .vocab-tab-btn {
        padding: 0.6rem 0.8rem;
        font-size: 0.85rem;
        flex: 1 1 auto;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .glass-card {
        padding: 1rem;
    }
}

/* --- SECCIÓN DE ESTADÍSTICAS GLOBALES Y HÁBITOS --- */
.global-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 1024px) {
    .global-stats-row {
        grid-template-columns: 1fr;
    }
}

.stats-sub-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.stats-sub-title {
    font-size: 0.95rem;
    font-weight: 850;
    color: var(--text-title);
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 0.6rem;
    margin-bottom: 0.2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stats-item-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-card);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stats-lbl {
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-val-num {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--text-title);
    letter-spacing: -0.5px;
}

.stats-list {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.stats-list-row {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.stats-icon-circle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.stats-icon-circle.blue {
    background: #eff6ff;
    border: 1px solid #dbeafe;
}

.stats-icon-circle.cyan {
    background: #ecfeff;
    border: 1px solid #cffafe;
}

.stats-icon-circle.green {
    background: #effaf5;
    border: 1px solid #d1fae5;
}

.stats-icon-circle.gold {
    background: #fefdf0;
    border: 1px solid #fef08a;
}

.stats-desc-box {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.stats-desc-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
}

.stats-desc-val {
    font-size: 0.85rem;
    color: var(--text-title);
    font-weight: 750;
}

/* --- FILTROS DE BALANCE DE APRENDIZAJE --- */
.balance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 0.85rem;
    margin-bottom: 1.25rem;
}

.balance-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-filter {
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    color: var(--text-body);
    padding: 0.45rem 1rem;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 750;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s, border-color 0.2s, color 0.2s;
    outline: none;
}

.btn-filter:hover {
    background-color: #e2e8f0;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.btn-filter.active {
    background: linear-gradient(135deg, var(--color-accent), #1d4ed8);
    color: #ffffff;
    border-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.btn-filter.active:hover {
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
    transform: translateY(-1px);
}

/* Scrollbars Premium y Sutiles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1; /* Slate 300 */
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8; /* Slate 400 */
}

/* ==========================================================================
   ESTILOS DE LA SECCIÓN DE VOCABULARIO Y GENERADOR DE LECTURAS CON IA
   ========================================================================== */
.vocabulary-ai-card {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.vocab-header-tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 2px solid var(--border-card);
    margin-bottom: 0.5rem;
}

.vocab-tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 750;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: -2px;
    outline: none;
}

.vocab-tab-btn:hover {
    color: var(--color-accent);
}

.vocab-tab-btn.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.vocab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.vocab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Controles de la bóveda de palabras */
.vault-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

@media (max-width: 600px) {
    .vault-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    #vault-search {
        max-width: 100% !important;
    }
}

#vault-search {
    flex-grow: 1;
    max-width: 400px;
    padding: 0.55rem 1.1rem;
    border: 1px solid var(--border-card);
    border-radius: 12px;
    outline: none;
    font-size: 0.85rem;
    transition: border-color 0.2s;
    background: rgba(255, 255, 255, 0.02);
    color: var(--color-primary);
}

#vault-search:focus {
    border-color: var(--color-accent);
}

.vault-table-wrapper {
    max-height: 400px;
    overflow: auto;
    border: 1px solid var(--border-card);
    border-radius: 16px;
    background: var(--bg-card);
}

.vault-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.vault-table th, 
.vault-table td {
    padding: 0.8rem 1.2rem;
    border-bottom: 1px solid var(--border-card);
}

.vault-table th {
    background: rgba(255, 255, 255, 0.05);
    font-weight: 800;
    color: var(--text-title);
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 2px solid var(--border-card);
}

.vault-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* Generador de Historias con IA */
.generator-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    min-height: 450px;
}

@media (max-width: 900px) {
    .generator-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.generator-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 750;
    color: var(--text-title);
}

.form-group input, 
.form-group select {
    width: 100%;
    box-sizing: border-box;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-card);
    border-radius: 12px;
    outline: none;
    font-size: 0.85rem;
    transition: border-color 0.2s;
    background: rgba(255, 255, 255, 0.02);
    color: var(--color-primary);
}

.form-group input:focus, 
.form-group select:focus {
    border-color: var(--color-accent);
}

.form-help {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.form-help a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 700;
}

.form-help a:hover {
    text-decoration: underline;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.btn-generate {
    background: linear-gradient(135deg, var(--color-accent), #1d4ed8);
    color: #ffffff;
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-weight: 800;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-generate:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
}

.btn-generate:disabled {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    border: 1px solid var(--border-card);
    cursor: not-allowed;
}

/* Panel de Vista Previa de la Generación */
.generator-preview-panel {
    border: 1px solid var(--border-card);
    border-radius: 20px;
    background: var(--bg-card);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 500px;
}

.preview-title {
    font-size: 0.9rem;
    font-weight: 850;
    color: var(--text-title);
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 0.5rem;
}

.preview-content-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-card);
    border-radius: 12px;
    padding: 1.25rem;
    height: 100%;
    overflow-y: auto;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--color-primary);
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    gap: 0.5rem;
    padding: 2rem 1rem;
}

.preview-icon {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.preview-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 0.75rem;
    text-align: center;
    padding: 2rem 1rem;
}

.spinner {
    width: 38px;
    height: 38px;
    border: 4px solid rgba(37, 99, 235, 0.1);
    border-top: 4px solid var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.rendered-markdown {
    color: var(--text-body);
}

.rendered-markdown h1,
.rendered-markdown h2,
.rendered-markdown h3 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-card);
    padding-bottom: 0.25rem;
}

.rendered-markdown h1 { font-size: 1.3rem; }
.rendered-markdown h2 { font-size: 1.15rem; }
.rendered-markdown h3 { font-size: 1rem; }

/* Grounding Warning & Checkbox Premium Styles */
.grounding-group {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    padding: 1rem;
    margin-top: 0.5rem;
    transition: all 0.2s ease;
}

.grounding-group:hover {
    border-color: var(--border-card-hover);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.grounding-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 750;
    color: var(--text-title);
    user-select: none;
}

.grounding-checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
    border: 1.5px solid var(--border-card);
    border-radius: 6px;
    appearance: none;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: rgba(255, 255, 255, 0.05);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grounding-checkbox-label input[type="checkbox"]:checked {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
}

.grounding-checkbox-label input[type="checkbox"]:checked::after {
    content: "✓";
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: bold;
    position: absolute;
}

.grounding-checkbox-label input[type="checkbox"]:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.grounding-warning-box {
    display: none;
    background: var(--color-orange-soft);
    border-left: 4px solid var(--color-orange);
    padding: 0.85rem 1rem;
    border-radius: 8px;
    margin-top: 0.75rem;
    font-size: 0.78rem;
    color: #c2410c;
    line-height: 1.5;
    animation: slideDown 0.3s ease;
}

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

/* Selector de niveles CEFR (píldoras) */
.level-selector {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
}

@media (max-width: 600px) {
    .level-selector {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.4rem;
    }
}

.level-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1.5px solid var(--border-card);
    border-radius: 10px;
    padding: 0.5rem 0.25rem;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--text-muted);
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    user-select: none;
    outline: none;
}

.level-btn:hover {
    border-color: var(--border-card-hover);
    color: var(--text-title);
    background: rgba(255, 255, 255, 0.08);
}

.level-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

/* Píldoras de temáticas combinadas */
.theme-pills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}

.theme-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 650;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.theme-pill:hover {
    border-color: var(--border-card-hover);
    color: var(--text-title);
    background: rgba(255, 255, 255, 0.08);
}

.theme-pill.active {
    background: rgba(37, 99, 235, 0.15);
    border-color: var(--color-accent);
    color: var(--color-accent);
    font-weight: 750;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.05);
}

/* Opciones de extensión personalizada */
.custom-length-group {
    display: none;
    margin-top: 0.75rem;
    animation: slideDown 0.3s ease;
}

.custom-length-warning-box {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--color-orange);
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    font-size: 0.75rem;
    color: #b45309;
    margin-top: 0.5rem;
    line-height: 1.4;
}

/* Grupo de botones del generador Codex */
.generator-actions-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.post-generation-actions {
    display: flex;
    gap: 0.8rem;
}

.btn-download-story {
    background: linear-gradient(135deg, #10b981, #059669); /* Esmeralda */
    color: #ffffff;
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-weight: 800;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-download-story:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-open-codex {
    background: linear-gradient(135deg, #7c3aed, #6366f1); /* Codex Violeta */
    color: #ffffff;
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-weight: 800;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    text-align: center;
}

.btn-open-codex:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
    color: #ffffff; /* Evitar que el color de enlace cambie */
}

/* Efectos de pulso / parpadeo premium */
@keyframes pulseGlowBlueEmerald {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

@keyframes pulseGlowVioletIndigo {
    0% {
        box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(124, 58, 237, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(124, 58, 237, 0);
    }
}

.pulse-blue-emerald {
    animation: pulseGlowBlueEmerald 2s infinite;
}

.pulse-violet-indigo {
    animation: pulseGlowVioletIndigo 2s infinite;
}

/* Botón de copia de prompt */
.btn-copy-prompt {
    flex: 1.2;
    padding: 0.9rem;
    border-radius: 14px;
    font-weight: 700;
    border: 1.5px dashed rgba(124, 58, 237, 0.4);
    background: rgba(124, 58, 237, 0.05);
    color: #7c3aed; /* Codex Violet */
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    font-size: 0.85rem;
}

.btn-copy-prompt:hover {
    background: rgba(124, 58, 237, 0.1);
    border-color: #7c3aed;
    transform: translateY(-1px);
}

.btn-copy-prompt:active {
    transform: translateY(1px);
}

/* Contenedor de pegado externo */
.external-paste-container {
    border-top: 1px dashed var(--border-card);
    margin-top: 0.5rem;
    padding-top: 0.8rem;
}

.btn-toggle-paste {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0;
    width: fit-content;
    transition: color 0.2s;
}

.btn-toggle-paste:hover {
    color: #7c3aed;
}

#external-text-input {
    width: 100%;
    height: 120px;
    border-radius: 12px;
    border: 1.5px solid var(--border-card);
    padding: 0.8rem;
    font-family: inherit;
    font-size: 0.85rem;
    resize: vertical;
    outline: none;
    transition: all 0.2s ease;
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-body);
}

#external-text-input:focus {
    border-color: #7c3aed;
    background-color: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.btn-process-external {
    background: #7c3aed;
    color: #ffffff;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.2s ease;
    align-self: flex-end;
}

.btn-process-external:hover {
    background: #6d28d9;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(124, 58, 237, 0.2);
}

.btn-process-external:active {
    transform: translateY(1px);
}

/* Responsive button layouts */
.generator-btn-row {
    display: flex;
    gap: 0.8rem;
    width: 100%;
}

@media (max-width: 580px) {
    .generator-btn-row {
        flex-direction: column;
        gap: 0.6rem;
    }
    .generator-btn-row button {
        width: 100% !important;
        flex: none !important;
    }

    .post-generation-actions {
        flex-direction: column;
        gap: 0.6rem;
    }
    .post-generation-actions button,
    .post-generation-actions a {
        width: 100% !important;
        flex: none !important;
    }
}

/* --- ESTILOS DE MODAL GLOBAL --- */
.payment-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.payment-modal.open {
    opacity: 1;
    visibility: visible;
}