/* ============================================================
   css/styles.css — DISEÑO ULTRA PREMIUM v4.1
   Sistema: Servicio Técnico 360
   Inspiración: Linear.app · Vercel · Stripe · Apple HIG
   
   MEJORAS v4.1:
   ✦ Mejoras de accesibilidad (contraste WCAG AA+)
   ✦ Micro-interacciones mejoradas en cards y botones
   ✦ Indicadores visuales adicionales para estados
   ✦ Optimización de rendimiento para backdrop-filter
   ✦ Mejor documentación de design tokens
   ✦ Estados más claros para filtros activos
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS — LIGHT MODE PREMIUM
   ============================================================ */
:root {
    /* --- Brand Colors --- */
    --primary:          #2563eb;
    --primary-dark:     #1d4ed8;
    --primary-hover:    #3b82f6;
    --primary-subtle:   #dbeafe;
    --primary-glow:     rgba(37, 99, 235, 0.30);
    --primary-ultra:    rgba(37, 99, 235, 0.08);

    /* --- Semantic Colors (mejor contraste) --- */
    --success:          #059669;
    --success-dark:     #047857;
    --success-subtle:   #d1fae5;
    --success-glow:     rgba(5, 150, 105, 0.20);
    
    --danger:           #dc2626;
    --danger-dark:      #b91c1c;
    --danger-subtle:    #fee2e2;
    
    --warning:          #d97706;
    --warning-dark:     #b45309;
    --warning-subtle:   #fef3c7;
    
    --info:             #0891b2;
    --info-subtle:      #cffafe;

    /* --- SURFACE COLORS (profundidad mejorada) --- */
    --bg-main:          #eef2f9;   /* Azul pizarra sutil */
    --bg-deep:          #e5ebf5;   /* Más oscuro para contraste */
    --bg-subtle:        #f8fafc;   /* Inputs / hover zones */
    --card-bg:          #ffffff;
    --card-bg-elevated: #fafbff;
    --border-color:     #e2e8f0;
    --border-strong:    #cbd5e1;
    --border-glow:      rgba(37, 99, 235, 0.25);

    /* --- TYPOGRAPHY (mejor contraste WCAG AA+) --- */
    --text-primary:     #0f172a;   /* Contraste > 15:1 sobre blanco */
    --text-secondary:   #334155;   /* Contraste > 8:1 */
    --text-muted:       #475569;   /* Contraste > 5:1 (mejorado) */
    --text-light:       #64748b;

    /* --- Shadows con tinte de color --- */
    --shadow-sm:    0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md:    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg:    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl:    0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-primary: 0 8px 20px rgba(37, 99, 235, 0.25);
    --shadow-success: 0 6px 16px rgba(5, 150, 105, 0.20);
    --shadow-warning: 0 6px 16px rgba(217, 119, 6, 0.20);

    /* --- Border Radius --- */
    --radius-sm:    6px;
    --radius-md:    10px;
    --radius-lg:    14px;
    --radius-xl:    20px;
    --radius-2xl:   28px;
    --radius-full:  9999px;

    /* --- Transiciones mejoradas --- */
    --transition-fast:   all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base:   all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================================
   2. DESIGN TOKENS — DARK MODE PREMIUM (mejor contraste)
   ============================================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --primary:          #3b82f6;
        --primary-dark:     #60a5fa;
        --primary-subtle:   rgba(59, 130, 246, 0.2);
        --primary-glow:     rgba(59, 130, 246, 0.35);
        
        --success:          #34d399;
        --success-dark:     #2dd4bf;
        --success-subtle:   rgba(52, 211, 153, 0.15);
        
        --danger:           #f87171;
        --danger-dark:      #ef4444;
        --danger-subtle:    rgba(248, 113, 113, 0.15);
        
        --warning:          #fbbf24;
        --warning-dark:     #f59e0b;
        --warning-subtle:   rgba(251, 191, 36, 0.15);
        
        --info:             #22d3ee;
        --info-subtle:      rgba(34, 211, 238, 0.15);

        --bg-main:          #0a0c12;
        --bg-deep:          #05070c;
        --bg-subtle:        #11131f;
        --card-bg:          #11131f;
        --card-bg-elevated: #1a1d2b;
        --border-color:     rgba(255, 255, 255, 0.1);
        --border-strong:    rgba(255, 255, 255, 0.2);
        
        --text-primary:     #f1f5f9;
        --text-secondary:   #cbd5e1;
        --text-muted:       #94a3b8;
        --text-light:       #64748b;

        --shadow-sm:    0 1px 2px rgba(0, 0, 0, 0.5);
        --shadow-md:    0 4px 6px rgba(0, 0, 0, 0.5);
        --shadow-lg:    0 10px 20px rgba(0, 0, 0, 0.6);
        --shadow-xl:    0 20px 40px rgba(0, 0, 0, 0.7);
        --shadow-primary: 0 8px 24px rgba(59, 130, 246, 0.35);
        --shadow-success: 0 6px 20px rgba(52, 211, 153, 0.25);
        --shadow-warning: 0 6px 20px rgba(251, 191, 36, 0.25);
    }
}

/* ============================================================
   3. BASE & RESET
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    background-color: var(--bg-main);
}

body {
    background-color: var(--bg-main);
    background-image: radial-gradient(
        circle at 1px 1px,
        var(--border-color) 0.5px,
        transparent 1px
    );
    background-size: 32px 32px;
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI',
                 Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* ============================================================
   4. NAV — Glassmorphism optimizado (mejor rendimiento)
   ============================================================ */
nav {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-secondary);
    padding: 0 32px;
    height: 62px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    nav {
        background: rgba(10, 12, 18, 0.85);
    }
}

nav h2 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 8px;
}

nav h2::after {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary-glow);
    display: inline-block;
    margin-left: 2px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

nav button {
    padding: 8px 18px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-base);
    min-height: 36px;
}

@media (hover: hover) {
    nav button:hover {
        background: var(--bg-subtle);
        border-color: var(--border-strong);
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
    }
}

nav button#logout {
    background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
    color: white;
    border: none;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.25);
}

@media (hover: hover) {
    nav button#logout:hover {
        background: linear-gradient(135deg, #ef4444 0%, var(--danger) 100%);
        box-shadow: 0 4px 16px rgba(220, 38, 38, 0.45);
        transform: translateY(-1px);
    }
}

/* ============================================================
   5. LAYOUT PRINCIPAL
   ============================================================ */
main {
    padding: 28px 24px;
    max-width: 1300px;
    margin: 0 auto;
}

.box-container {
    background: var(--card-bg);
    padding: 28px 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    border-top: 1px solid rgba(255, 255, 255, 0.9);
    transition: background 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
    position: relative;
    overflow: hidden;
}

/* Gradiente sutil de esquina superior derecha */
.box-container::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(
        circle at top right,
        var(--primary-ultra) 0%,
        transparent 70%
    );
    pointer-events: none;
    border-radius: 0 var(--radius-xl) 0 100%;
}

.box-container h3 {
    margin-top: 0;
    margin-bottom: 24px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
}

/* Barra de acento izquierda más elegante */
.box-container h3::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 18px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 2px;
    flex-shrink: 0;
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ============================================================
   6. FORMULARIO
   ============================================================ */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

input,
textarea,
select {
    padding: 0 14px;
    min-height: 48px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    background: var(--bg-subtle);
    transition: var(--transition-fast);
    color: var(--text-primary);
    line-height: 1;
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

textarea {
    padding: 14px;
    line-height: 1.6;
    min-height: 100px;
    resize: vertical;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

input:focus,
textarea:focus,
select:focus {
    background: var(--card-bg);
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-subtle);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-light);
    opacity: 0.85;
}

/* ============================================================
   7. BOTONES (mejorados)
   ============================================================ */

/* Botón Principal — gradiente + glow optimizado */
.btn-main {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 0 24px;
    min-height: 52px;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: -0.01em;
    box-shadow: var(--shadow-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-main::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s ease;
    pointer-events: none;
}

@media (hover: hover) {
    .btn-main:hover {
        background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
        box-shadow: 0 12px 28px rgba(37, 99, 235, 0.45);
        transform: translateY(-2px);
    }
    
    .btn-main:hover::before {
        left: 150%;
    }
}

.btn-main:active {
    transform: scale(0.98) translateY(0);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.30);
}

/* Botón Secundario */
.btn-secondary {
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0 18px;
    min-height: 44px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--shadow-sm);
}

@media (hover: hover) {
    .btn-secondary:hover {
        background: var(--bg-subtle);
        border-color: var(--border-strong);
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
    }
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* ============================================================
   8. STAT CARDS — Versión Premium v4.1 (mejor contraste)
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--card-bg);
    padding: 24px 28px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 12px;
    border: 1px solid var(--border-color);
    cursor: default;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

/* Borde superior con gradiente */
.stat-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 70%, transparent 100%);
    opacity: 0.8;
}

/* Glow de fondo decorativo */
.stat-card::before {
    content: "";
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, var(--primary-ultra) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transition: var(--transition-slow);
}

@media (hover: hover) {
    .stat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-xl);
        border-color: var(--border-glow);
    }
    
    .stat-card:hover::before {
        width: 150px;
        height: 150px;
    }
}

.stat-card h3 {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-card p {
    margin: 0;
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card small {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Variante Money */
.stat-card.money::after {
    background: linear-gradient(90deg, var(--success) 0%, var(--success-dark) 70%, transparent 100%);
}

.stat-card.money::before {
    background: radial-gradient(circle, rgba(5, 150, 105, 0.08) 0%, transparent 70%);
}

.stat-card.money p {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Variante Pending */
.stat-card.pending::after {
    background: linear-gradient(90deg, var(--warning) 0%, var(--warning-dark) 70%, transparent 100%);
}

.stat-card.pending::before {
    background: radial-gradient(circle, rgba(217, 119, 6, 0.08) 0%, transparent 70%);
}

.stat-card.pending p {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================================
   9. TABS — Versión más refinada
   ============================================================ */
.tabs-container {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    padding: 6px;
    background: var(--bg-deep);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tab-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    color: var(--text-muted);
    font-size: 0.88rem;
    min-height: 44px;
    letter-spacing: -0.01em;
}

@media (hover: hover) {
    .tab-btn:hover:not(.active) {
        background: rgba(255, 255, 255, 0.5);
        color: var(--text-secondary);
    }
}

.tab-btn.active {
    background: var(--card-bg);
    color: var(--primary);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.tab-btn:active {
    transform: scale(0.98);
}

/* ============================================================
   10. FILTROS — Mejorados (contraste y feedback)
   ============================================================ */
.filter-group {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
}

.btn-filter {
    padding: 8px 20px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-color);
    background: var(--card-bg);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-base);
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

@media (hover: hover) {
    .btn-filter:hover:not(.active) {
        background: var(--bg-subtle);
        border-color: var(--border-strong);
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
    }
}

.btn-filter.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.btn-filter:active {
    transform: scale(0.96);
}

/* ============================================================
   11. REPARACIÓN CARDS — Estados premium con indicadores visuales
   ============================================================ */
.reparacion-card {
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 12px;
    position: relative;
    border: 1px solid var(--border-color);
    border-left-width: 5px;
    transition: var(--transition-slow);
    cursor: pointer;
}

/* Estados con colores semánticos y mejor contraste */
.reparacion-card.estado-recibido {
    border-left-color: var(--info);
    background-image: linear-gradient(105deg, var(--info-subtle) 0%, transparent 40%);
}

.reparacion-card.estado-proceso {
    border-left-color: var(--primary);
    background-image: linear-gradient(105deg, var(--primary-subtle) 0%, transparent 40%);
}

.reparacion-card.estado-laboratorio {
    border-left-color: var(--warning);
    background-image: linear-gradient(105deg, var(--warning-subtle) 0%, transparent 40%);
}

.reparacion-card.estado-entregado,
.reparacion-card.estado-listos {
    border-left-color: var(--success);
    background-image: linear-gradient(105deg, var(--success-subtle) 0%, transparent 40%);
}

@media (hover: hover) {
    .reparacion-card:hover {
        transform: translateX(4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--border-strong);
    }
}

/* Badges de estado mejorados */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--bg-subtle);
    color: var(--text-secondary);
}

.status-badge.recibido {
    background: var(--info-subtle);
    color: var(--info);
}

.status-badge.proceso {
    background: var(--primary-subtle);
    color: var(--primary);
}

.status-badge.laboratorio {
    background: var(--warning-subtle);
    color: var(--warning);
}

.status-badge.listos,
.status-badge.entregado {
    background: var(--success-subtle);
    color: var(--success);
}

/* Botones de acción en cards */
.btn-edit, .btn-print, .btn-archive {
    transition: var(--transition-bounce);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 6px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
}

@media (hover: hover) {
    .btn-edit:hover, .btn-print:hover, .btn-archive:hover {
        transform: scale(1.15);
        background: var(--bg-subtle);
    }
}

.btn-edit:active, .btn-print:active, .btn-archive:active {
    transform: scale(0.95);
}

.select-estado {
    transition: var(--transition-base);
    font-weight: 600;
    min-height: 36px;
    padding: 0 12px;
}

.select-estado:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-subtle);
}

#canvasPatron {
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

/* ============================================================
   12. TOASTS — Refinados con mejor animación
   ============================================================ */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: min(400px, calc(100vw - 48px));
}

.toast {
    background: rgba(10, 14, 30, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #f1f5f9;
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: toast-in 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    border-left: 3px solid var(--primary);
}

.toast.success {
    border-left-color: var(--success);
    background: rgba(5, 120, 55, 0.95);
}

.toast.error {
    border-left-color: var(--danger);
    background: rgba(185, 28, 28, 0.95);
}

.toast.warning {
    border-left-color: var(--warning);
    background: rgba(161, 73, 0, 0.95);
}

.toast-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 13.5px;
    font-weight: 500;
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    opacity: 0.6;
    padding: 4px;
    border-radius: 4px;
    transition: opacity 0.15s;
}

.toast-close:hover {
    opacity: 1;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toast-out {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ============================================================
   13. SPINNER
   ============================================================ */
.spinner {
    display: inline-block;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2.5px solid transparent;
    border-top-color: white;
    border-right-color: rgba(255, 255, 255, 0.4);
    animation: spin 0.75s cubic-bezier(0.6, 0, 0.4, 1) infinite;
}

.spinner.dark {
    border-top-color: var(--primary);
    border-right-color: rgba(37, 99, 235, 0.3);
}

.spinner-overlay {
    position: fixed;
    inset: 0;
    background: rgba(238, 242, 249, 0.88);
    backdrop-filter: blur(6px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9998;
    flex-direction: column;
    gap: 16px;
    animation: overlay-in 0.2s ease;
}

@media (prefers-color-scheme: dark) {
    .spinner-overlay {
        background: rgba(6, 9, 16, 0.88);
    }
}

.spinner-overlay .spinner {
    width: 42px;
    height: 42px;
    border-width: 3.5px;
    border-top-color: var(--primary);
    border-right-color: var(--primary-subtle);
}

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

@keyframes overlay-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================================
   14. MODAL / BANNER RESUMEN (mejorado)
   ============================================================ */
#bannerResumen {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.65);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
    animation: fade-in 0.22s ease;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.banner-contenido {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    max-width: 520px;
    width: 100%;
    max-height: 82vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    animation: modal-in 0.38s cubic-bezier(0.34, 1.56, 0.64, 1);
    scrollbar-width: thin;
}

.banner-contenido::-webkit-scrollbar {
    width: 6px;
}

.banner-contenido::-webkit-scrollbar-track {
    background: transparent;
}

.banner-contenido::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 10px;
}

@keyframes modal-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.banner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 22px 26px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--card-bg);
    z-index: 1;
}

.banner-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 800;
}

#bannerCuerpo {
    padding: 22px 26px;
}

.banner-seccion {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.banner-seccion:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.banner-seccion h4 {
    margin: 0 0 12px 0;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.banner-footer {
    padding: 16px 26px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    position: sticky;
    bottom: 0;
    background: var(--card-bg);
}

.btn-entendido {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 0 28px;
    min-height: 44px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-primary);
}

@media (hover: hover) {
    .btn-entendido:hover {
        background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
        transform: translateY(-1px);
        box-shadow: var(--shadow-primary);
    }
}

/* ============================================================
   15. RESPONSIVIDAD MEJORADA
   ============================================================ */
@media (max-width: 768px) {
    nav {
        padding: 0 16px;
        height: 56px;
    }
    
    main {
        padding: 16px 12px;
    }
    
    .box-container {
        padding: 20px 16px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px 20px;
    }
    
    .stat-card p {
        font-size: 2rem;
    }
    
    .tabs-container {
        gap: 6px;
    }
    
    .tab-btn {
        padding: 8px 12px;
        font-size: 0.83rem;
    }
}

@media (max-width: 480px) {
    nav h2 {
        font-size: 0.95rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: 14px 18px;
    }
    
    .stat-card p {
        font-size: 1.8rem;
    }
    
    .toast-container {
        bottom: 16px;
        right: 16px;
        left: 16px;
        max-width: calc(100vw - 32px);
    }
    
    .toast {
        min-width: unset;
        width: 100%;
    }
    
    .filter-group {
        gap: 8px;
    }
    
    .btn-filter {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
}

/* ============================================================
   16. UTILIDADES MEJORADAS
   ============================================================ */
.text-success { 
    color: var(--success); 
    font-weight: 600;
}

.text-danger { 
    color: var(--danger);
    font-weight: 600;
}

.text-warning { 
    color: var(--warning);
    font-weight: 600;
}

.text-info {
    color: var(--info);
    font-weight: 600;
}

.text-muted {
    color: var(--text-muted);
}

/* Skeleton Loader mejorado */
.skeleton {
    background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-subtle) 50%, var(--border-color) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
    from { background-position: 200% 0; }
    to { background-position: -200% 0; }
}

/* Focus visible para accesibilidad */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 10px;
    transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selección de texto mejorada */
::selection {
    background: var(--primary-subtle);
    color: var(--primary);
}

/* Mejora de rendimiento para animaciones */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}