/* ============================================================
   SISTEMA DE DISEÑO PERSONALIZADO - ACTIVIDADES GRUPALES
   Paleta moderna, efectos suaves y microinteracciones elegantes
   ============================================================ */

:root {
    /* === PALETA DE COLORES MODERNA === */
    --primary: #6366f1;           /* Indigo vibrante */
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-lighter: #eef2ff;

    --secondary: #ec4899;         /* Pink moderno */
    --secondary-dark: #db2777;
    --secondary-light: #f9a8d4;

    --success: #10b981;           /* Green esmeralda */
    --success-dark: #059669;
    --success-light: #d1fae5;

    --warning: #f59e0b;           /* Amber */
    --warning-dark: #d97706;
    --warning-light: #fef3c7;

    --danger: #ef4444;            /* Red vibrante */
    --danger-dark: #dc2626;
    --danger-light: #fee2e2;

    --info: #3b82f6;              /* Blue brillante */
    --info-dark: #2563eb;
    --info-light: #dbeafe;

    /* === NEUTRALES === */
    --gray-50: #fafafa;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-300: #d4d4d8;
    --gray-400: #a1a1aa;
    --gray-500: #71717a;
    --gray-600: #52525b;
    --gray-700: #3f3f46;
    --gray-800: #27272a;
    --gray-900: #18181b;

    /* === SOMBRAS MODERNAS (más sutiles) === */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* === BORDES === */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* === TRANSICIONES === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* === ESPACIADO === */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* === RESET Y BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(to bottom, var(--gray-50), #ffffff);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

/* === TIPOGRAFÍA MEJORADA === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

/* === CARDS MODERNAS === */
.card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    overflow: hidden;
}

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

.card-modern {
    background: white;
    border: none;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.card-modern:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

/* === BOTONES MODERNOS === */
.btn {
    font-weight: 600;
    border-radius: var(--radius-lg);
    padding: 0.625rem 1.25rem;
    transition: all var(--transition-base);
    border: none;
    text-transform: none;
    letter-spacing: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px -2px rgb(99 102 241 / 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    box-shadow: 0 6px 20px -2px rgb(99 102 241 / 0.5);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px -2px rgb(16 185 129 / 0.4);
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-dark) 0%, var(--success) 100%);
    box-shadow: 0 6px 20px -2px rgb(16 185 129 / 0.5);
    transform: translateY(-1px);
}

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

.btn-outline-primary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-1px);
}

/* === BADGES MODERNOS === */
.badge {
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

.badge.bg-success {
    background: var(--success) !important;
    box-shadow: 0 2px 8px -2px rgb(16 185 129 / 0.3);
}

.badge.bg-warning {
    background: var(--warning) !important;
    color: var(--gray-900) !important;
    box-shadow: 0 2px 8px -2px rgb(245 158 11 / 0.3);
}

.badge.bg-danger {
    background: var(--danger) !important;
    box-shadow: 0 2px 8px -2px rgb(239 68 68 / 0.3);
}

.badge.bg-info {
    background: var(--info) !important;
    box-shadow: 0 2px 8px -2px rgb(59 130 246 / 0.3);
}

/* === INPUTS MODERNOS === */
.form-control, .form-select {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    transition: all var(--transition-base);
    font-size: 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-lighter);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

/* === ALERTAS MODERNAS === */
.alert {
    border: none;
    border-radius: var(--radius-xl);
    padding: 1rem 1.25rem;
    border-left: 4px solid;
}

.alert-success {
    background: var(--success-light);
    border-left-color: var(--success);
    color: var(--success-dark);
}

.alert-warning {
    background: var(--warning-light);
    border-left-color: var(--warning);
    color: var(--warning-dark);
}

.alert-danger {
    background: var(--danger-light);
    border-left-color: var(--danger);
    color: var(--danger-dark);
}

.alert-info {
    background: var(--info-light);
    border-left-color: var(--info);
    color: var(--info-dark);
}

/* === ANIMACIONES SUAVES === */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-slide-up {
    animation: slideUp 0.6s ease-out;
}

/* === UTILIDADES MODERNAS === */
.glass-effect {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.gradient-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* === MEJORAS ESPECÍFICAS PARA EL PROYECTO === */
.numero-boton {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.numero-boton::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.numero-boton:active::before {
    width: 300px;
    height: 300px;
}

/* Overlay para imágenes */
.img-overlay {
    position: relative;
    overflow: hidden;
}

.img-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.img-overlay:hover::after {
    opacity: 1;
}

/* === BACKDROP BLUR === */
.backdrop-blur {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.bg-opacity-10 {
    --bs-bg-opacity: 0.1;
}

.bg-opacity-75 {
    --bs-bg-opacity: 0.75;
}

.opacity-75 {
    opacity: 0.75;
}

/* === ESTILOS PARA BADGES DE NÚMEROS === */
.bg-primary-subtle {
    background-color: var(--primary-lighter) !important;
}

.text-primary {
    color: var(--primary) !important;
}

.bg-gray-200 {
    background-color: var(--gray-200) !important;
}

/* === INPUT GROUP MODERNO === */
.input-group-text {
    background-color: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-right: none;
    color: var(--gray-600);
    font-weight: 600;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.input-group:focus-within .input-group-text {
    border-color: var(--primary);
    background-color: var(--primary-lighter);
    color: var(--primary-dark);
}

.input-group:focus-within .form-control {
    border-color: var(--primary);
}

/* === BOTONES DE NÚMEROS EN LA RIFA === */
.btn-numero {
    position: relative;
    overflow: hidden;
    border: 2px solid var(--gray-300);
    background: white;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-xs);
}

.btn-numero:hover {
    border-color: var(--primary-light);
    background: var(--primary-lighter);
    color: var(--primary-dark);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.btn-numero.seleccionado {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    border-color: var(--success-dark);
    color: white;
    box-shadow: 0 4px 12px -2px rgb(16 185 129 / 0.4);
}

.btn-numero.reservado {
    background: var(--gray-300);
    border-color: var(--gray-400);
    color: var(--gray-500);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-numero.vendido {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger-dark);
    cursor: not-allowed;
}

/* === HOVER UTILITIES === */
.hover-primary:hover {
    color: var(--primary) !important;
}

.hover-light:hover {
    color: #ffffff !important;
    transition: color var(--transition-fast);
}

/* === BADGES OUTLINE === */
.badge-outline {
    background: transparent !important;
    border: 2px solid currentColor;
    font-weight: 600;
}

/* === SHADOW UTILITIES === */
.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* === ROUNDED UTILITIES === */
.rounded-3 {
    border-radius: var(--radius-lg) !important;
}

.rounded-4 {
    border-radius: var(--radius-xl) !important;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .btn-numero {
        font-size: 0.875rem;
        padding: 0.5rem;
    }
}

/* ============================================================
   MODO OSCURO
   ============================================================ */

[data-bs-theme="dark"] {
    --body-bg: var(--gray-900);
    --body-color: var(--gray-100);
    --heading-color: #ffffff;
    --card-bg: var(--gray-800);
    --card-border: var(--gray-700);
    --input-bg: var(--gray-800);
    --input-border: var(--gray-600);
    --muted-color: var(--gray-400);
}

[data-bs-theme="dark"] html {
    background-color: var(--body-bg);
}

[data-bs-theme="dark"] body {
    background: var(--body-bg) !important;
    background-color: var(--body-bg) !important;
    background-image: none !important;
    color: var(--body-color);
}

[data-bs-theme="dark"] h1,
[data-bs-theme="dark"] h2,
[data-bs-theme="dark"] h3,
[data-bs-theme="dark"] h4,
[data-bs-theme="dark"] h5,
[data-bs-theme="dark"] h6 {
    color: var(--heading-color);
}

[data-bs-theme="dark"] .text-muted {
    color: var(--muted-color) !important;
}

[data-bs-theme="dark"] .text-dark {
    color: var(--body-color) !important;
}

[data-bs-theme="dark"] .card {
    background-color: var(--card-bg);
    border-color: var(--card-border);
}

[data-bs-theme="dark"] .card-modern {
    background-color: var(--card-bg);
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--body-color);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    color: var(--body-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.25);
}

[data-bs-theme="dark"] .form-control::placeholder,
[data-bs-theme="dark"] .form-select::placeholder {
    color: var(--gray-500);
}

[data-bs-theme="dark"] .form-label {
    color: var(--gray-300);
}

[data-bs-theme="dark"] .input-group-text {
    background-color: var(--gray-700);
    border-color: var(--input-border);
    color: var(--gray-300);
}

[data-bs-theme="dark"] .input-group .form-control {
    border-color: var(--input-border);
}

[data-bs-theme="dark"] .input-group:focus-within .input-group-text {
    background-color: var(--gray-700);
}

[data-bs-theme="dark"] .btn-numero {
    background: var(--gray-800);
    border-color: var(--gray-600);
    color: var(--gray-200);
}

[data-bs-theme="dark"] .btn-numero:hover {
    background: var(--primary-lighter);
    color: var(--primary-dark);
}

/* Estados del grid de números en modo oscuro */
[data-bs-theme="dark"] .btn-numero.numero-libre {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-color: transparent;
    color: white;
}

[data-bs-theme="dark"] .btn-numero.numero-libre:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 16px -2px rgb(16 185 129 / 0.5);
}

[data-bs-theme="dark"] .btn-numero.btn-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-color: transparent;
    color: var(--gray-900) !important;
}

[data-bs-theme="dark"] .btn-numero.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    border-color: var(--warning);
    color: white;
}

/* Botones de números en estados especiales del grid */
.btn-numero-completado {
    background-color: #f8f9fa !important;
}

[data-bs-theme="dark"] .btn-numero-completado {
    background-color: var(--gray-700) !important;
    border-color: transparent;
    color: var(--gray-400);
}

.btn-numero-pagado {
    background-color: #8c8c8c !important;
}

/* Emoji VIP sobre cupos confirmados (personalización de actividad) */
.btn-numero-pagado .cupos-num-fondo {
    opacity: 0.3;
    font-size: 0.8em;
    font-weight: 700;
}

.btn-numero-pagado .cupos-emoji {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    line-height: 1;
    pointer-events: none;
}

[data-bs-theme="dark"] .btn-numero-pagado {
    background-color: #6b7280 !important;
    border-color: transparent;
    color: white;
}

[data-bs-theme="dark"] .bg-light {
    background-color: var(--gray-800) !important;
}

[data-bs-theme="dark"] .bg-primary-subtle {
    background-color: rgba(99, 102, 241, 0.15) !important;
}

[data-bs-theme="dark"] .bg-gray-200 {
    background-color: var(--gray-700) !important;
}

[data-bs-theme="dark"] .glass-effect {
    background: rgba(39, 39, 42, 0.9);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .dropdown-menu {
    background-color: var(--card-bg);
    border-color: var(--card-border);
}

[data-bs-theme="dark"] .dropdown-item {
    color: var(--body-color);
}

[data-bs-theme="dark"] .dropdown-item:hover,
[data-bs-theme="dark"] .dropdown-item:focus {
    background-color: var(--gray-700);
    color: var(--heading-color);
}

[data-bs-theme="dark"] .dropdown-divider {
    border-color: var(--card-border);
}

[data-bs-theme="dark"] .list-group-item {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--body-color);
}

[data-bs-theme="dark"] .modal-content {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--body-color);
}

[data-bs-theme="dark"] .modal-header,
[data-bs-theme="dark"] .modal-footer {
    border-color: var(--card-border);
}

[data-bs-theme="dark"] .table {
    --bs-table-color: var(--body-color);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--card-border);
}

[data-bs-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * {
    --bs-table-accent-bg: rgba(255, 255, 255, 0.03);
}

[data-bs-theme="dark"] .pagination {
    --bs-pagination-bg: var(--card-bg);
    --bs-pagination-border-color: var(--card-border);
    --bs-pagination-color: var(--body-color);
    --bs-pagination-hover-bg: var(--gray-700);
    --bs-pagination-hover-border-color: var(--card-border);
    --bs-pagination-hover-color: var(--heading-color);
    --bs-pagination-active-bg: var(--primary);
    --bs-pagination-active-border-color: var(--primary);
    --bs-pagination-disabled-bg: var(--gray-800);
    --bs-pagination-disabled-border-color: var(--card-border);
    --bs-pagination-disabled-color: var(--gray-500);
}

[data-bs-theme="dark"] .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-bs-theme="dark"] hr {
    border-color: var(--card-border);
}

[data-bs-theme="dark"] .border,
[data-bs-theme="dark"] .border-top,
[data-bs-theme="dark"] .border-bottom,
[data-bs-theme="dark"] .border-start,
[data-bs-theme="dark"] .border-end {
    border-color: var(--card-border) !important;
}

/* Transición suave al cambiar de tema (opcional) */
.theme-transition,
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease !important;
}

/* ============================================================
   HEADER SUPERIOR (site-header)
   Barra con degradado de marca, enlaces tipo píldora, CTA
   destacado y chips translúcidos para usuario y tema.
   ============================================================ */
.site-header {
    /* Fallback sólido legible si el degradado no está disponible */
    background-color: var(--primary-dark);
    background-image: linear-gradient(120deg, var(--primary-dark) 0%, var(--primary) 55%, #7c3aed 130%);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid rgb(255 255 255 / 0.08);
}

[data-bs-theme="dark"] .site-header {
    /* Fallback sólido legible si el degradado no está disponible */
    background-color: #1e1b4b;
    background-image: linear-gradient(120deg, #14163a 0%, #26246b 55%, var(--primary-dark) 130%);
    box-shadow: 0 2px 16px rgb(0 0 0 / 0.45);
}

/* Marca */
.site-header .brand-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: rgb(255 255 255 / 0.18);
    border: 1px solid rgb(255 255 255 / 0.25);
    backdrop-filter: blur(4px);
    font-size: 1.15rem;
    transition: transform var(--transition-base), background-color var(--transition-base);
}

.site-header .navbar-brand:hover .brand-badge {
    transform: rotate(-8deg) scale(1.08);
    background: rgb(255 255 255 / 0.28);
}

.site-header .brand-accent {
    color: #c7d2fe;
}

[data-bs-theme="dark"] .site-header .brand-accent {
    color: #a5b4fc;
}

/* Enlaces tipo píldora */
.site-header .pill-link {
    color: rgb(255 255 255 / 0.85);
    font-weight: 500;
    padding: 0.45rem 1rem;
    border-radius: var(--radius-full);
    transition: color var(--transition-base), background-color var(--transition-base);
}

.site-header .pill-link:hover,
.site-header .pill-link:focus {
    color: #fff;
    background: rgb(255 255 255 / 0.14);
}

.site-header .pill-link.active {
    color: #fff;
    background: rgb(255 255 255 / 0.22);
    font-weight: 700;
}

/* CTA principal: Crear Actividad */
.btn-cta-header {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: #fff;
    border: none;
    font-weight: 600;
    box-shadow: 0 3px 10px rgb(16 185 129 / 0.35);
    transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
}

.btn-cta-header:hover,
.btn-cta-header:focus {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 5px 14px rgb(16 185 129 / 0.5);
    filter: brightness(1.05);
}

.btn-cta-header.active-cta {
    outline: 2px solid rgb(255 255 255 / 0.6);
    outline-offset: 2px;
}

/* Chips translúcidos: usuario y tema */
.site-header .user-chip,
.site-header .theme-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgb(255 255 255 / 0.14);
    border: 1px solid rgb(255 255 255 / 0.28);
    color: #fff;
    border-radius: var(--radius-full);
    backdrop-filter: blur(4px);
    transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

.site-header .user-chip {
    padding: 0.3rem 0.85rem 0.3rem 0.35rem;
    font-weight: 600;
    text-decoration: none;
}

.site-header .theme-chip {
    width: 38px;
    height: 38px;
    padding: 0;
    justify-content: center;
}

.site-header .user-chip:hover,
.site-header .user-chip:focus,
.site-header .theme-chip:hover,
.site-header .theme-chip:focus {
    background: rgb(255 255 255 / 0.26);
    border-color: rgb(255 255 255 / 0.4);
    color: #fff;
}

.site-header .user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* Dropdown del usuario */
.site-header .dropdown-menu {
    border-radius: var(--radius-lg);
}

.site-header .dropdown-item {
    border-radius: 0.5rem;
    margin-inline: 0.5rem;
    padding-inline: 0.75rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-header .dropdown-item:hover:not(.text-danger) {
    background-color: var(--primary-lighter);
    color: var(--primary-dark);
}

/* ============================================================
   VISTA DE ACTIVIDAD: tarjeta de medios (imagen + miniaturas)
   La imagen se estira hasta igualar la columna de información
   y en escritorio queda fija mientras se recorre el contenido.
   ============================================================ */
.actividad-media {
    /* Ancla los sellos y botones absolutos; sticky lo sustituye en escritorio */
    position: relative;
    background-color: var(--gray-200);
    min-height: 320px;
}

.actividad-media .actividad-img {
    min-height: 320px;
    object-fit: cover;
}

.actividad-thumbs {
    background-color: rgb(24 24 27 / 0.72);
    backdrop-filter: blur(6px);
    scrollbar-width: thin;
}

.actividad-thumbs img {
    cursor: pointer;
    opacity: 0.85;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.actividad-thumbs img:hover {
    transform: translateY(-2px) scale(1.04);
    opacity: 1;
    box-shadow: var(--shadow-md);
}

@media (min-width: 992px) {
    .actividad-media {
        position: sticky;
        top: 84px;
        min-height: 480px;
        max-height: calc(100vh - 100px);
    }
}

[data-bs-theme="dark"] .actividad-media {
    background-color: var(--gray-800);
}

/* Encabezados de tabla claros adaptables al tema (dejan de ser franja
   blanca fija en modo oscuro; legibles en ambos) */
[data-bs-theme="dark"] .table-light {
    --bs-table-bg: var(--gray-800);
    --bs-table-color: var(--gray-100);
}

/* Insignia del hero en el inicio: pill blanca fija con texto oscuro.
   El degradado del hero es idéntico en ambos temas, así que la pill
   se mantiene legible sin depender del remapeo de .text-dark. */
.badge-hero {
    background-color: #ffffff;
    color: #18181b;
}