/* ===== VARIABLES CSS ===== */
:root {
    /* Colores principales */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    
    /* Colores de estado */
    --success-color: #10b981;
    --success-dark: #059669;
    --danger-color: #ef4444;
    --danger-dark: #dc2626;
    --warning-color: #f59e0b;
    --warning-dark: #d97706;
    --info-color: #06b6d4;
    --info-dark: #0891b2;
    
    /* Colores neutros */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --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);
    
    /* Bordes */
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Transiciones */
    --transition: all 0.2s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
    
    /* Espaciado */
    --container-padding: 1rem;
    --section-spacing: 2rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--gray-900);
    line-height: 1.6;
    font-size: 0.875rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== TIPOGRAFÍA ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--gray-700);
}

/* ===== LAYOUT ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--container-padding);
}

/* ===== HEADER ===== */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    /* Evitar parpadeo durante scroll */
    will-change: transform, opacity;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.logo a:hover {
    color: var(--gray-100);
    transform: translateY(-1px);
}

.logo i {
    font-size: 1.75rem;
    color: var(--accent-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.user-info span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.logout-btn {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.logout-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    color: var(--white);
    text-decoration: none;
}

/* ===== NAVEGACIÓN ===== */
nav {
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-container::-webkit-scrollbar {
    display: none;
}

.nav-item {
    padding: 1rem 1.5rem;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-item:hover, .nav-item.active {
    color: var(--primary-color);
    background-color: var(--gray-50);
    border-bottom-color: var(--primary-color);
}

.nav-item i {
    font-size: 1rem;
}

/* ===== MAIN CONTENT ===== */
main {
    padding: var(--section-spacing) 0;
    flex: 1;
    min-height: 0;
}

/* ===== CARDS ===== */
.card {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.card-header {
    padding: 1.5rem;
    background-color: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1.5rem;
    background-color: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* ===== FORMULARIOS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background-color: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:disabled {
    background-color: var(--gray-100);
    cursor: not-allowed;
}

.form-text {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

/* ===== BOTONES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover:before {
    left: 100%;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-dark) 0%, var(--success-color) 100%);
    border-color: var(--success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    color: var(--white);
    background: linear-gradient(135deg, var(--danger-color) 0%, var(--danger-dark) 100%);
    border-color: var(--danger-color);
}

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-dark) 0%, var(--danger-color) 100%);
    border-color: var(--danger-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-warning {
    color: var(--white);
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--warning-dark) 100%);
    border-color: var(--warning-color);
}

.btn-warning:hover {
    background: linear-gradient(135deg, var(--warning-dark) 0%, var(--warning-color) 100%);
    border-color: var(--warning-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-info {
    color: var(--white);
    background: linear-gradient(135deg, var(--info-color) 0%, var(--info-dark) 100%);
    border-color: var(--info-color);
}

.btn-info:hover {
    background: linear-gradient(135deg, var(--info-dark) 0%, var(--info-color) 100%);
    border-color: var(--info-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    color: var(--white);
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--gray-600) 100%);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--gray-600) 0%, var(--secondary-color) 100%);
    border-color: var(--gray-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== TABLAS ===== */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 0;
}

.table thead th {
    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
    color: var(--white);
    font-weight: 600;
    border: none;
    padding: 1rem;
    text-align: left;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table th, .table td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid var(--gray-200);
    font-size: 0.875rem;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:nth-child(even) {
    background-color: var(--gray-50);
}

.table tbody tr:hover {
    background-color: var(--gray-100);
    transform: scale(1.01);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

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

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

.badge-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, var(--danger-dark) 100%);
    color: var(--white);
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--warning-dark) 100%);
    color: var(--white);
}

.badge-info {
    background: linear-gradient(135deg, var(--info-color) 0%, var(--info-dark) 100%);
    color: var(--white);
}

.badge-secondary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--gray-600) 100%);
    color: var(--white);
}

.badge-light {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

/* Badges específicos para roles */
.badge-superadmin {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(220, 53, 69, 0.2);
}

.badge-admin {
    background: linear-gradient(135deg, #fd7e14 0%, #e55a00 100%);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(253, 126, 20, 0.2);
}

.badge-subadmin {
    background: linear-gradient(135deg, #6f42c1 0%, #5a2d91 100%);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(111, 66, 193, 0.2);
}

.badge-user {
    background: linear-gradient(135deg, #20c997 0%, #17a2b8 100%);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(32, 201, 151, 0.2);
}

/* ===== ALERTAS ===== */
.alert {
    position: relative;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.alert-success {
    color: var(--success-dark);
    background-color: #ecfdf5;
    border-color: #a7f3d0;
}

.alert-danger {
    color: var(--danger-dark);
    background-color: #fef2f2;
    border-color: #fecaca;
}

.alert-warning {
    color: var(--warning-dark);
    background-color: #fffbeb;
    border-color: #fed7aa;
}

.alert-info {
    color: var(--info-dark);
    background-color: #eff6ff;
    border-color: #bfdbfe;
}

/* ===== DASHBOARD ===== */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

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

.stat-card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    opacity: 0.8;
}

.stat-card-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.stat-card-title {
    color: var(--gray-600);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

a.stat-card.stat-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

a.stat-card.stat-card-link:hover .stat-card-title,
a.stat-card.stat-card-link:focus .stat-card-title {
    color: var(--primary-color);
}

a.stat-card.stat-card-link.stat-card-link--inactive::before {
    background: linear-gradient(90deg, #dc2626, #b91c1c);
}

a.stat-card.stat-card-link.stat-card-link--inactive:hover .stat-card-icon,
a.stat-card.stat-card-link.stat-card-link--inactive:focus .stat-card-icon {
    color: #dc2626;
}

a.stat-card.stat-card-link.stat-card-link--inactive:hover .stat-card-title,
a.stat-card.stat-card-link.stat-card-link--inactive:focus .stat-card-title {
    color: #dc2626;
}

/* ===== SISTEMA DE NOTIFICACIONES ===== */
.system-notifications {
    margin-bottom: var(--section-spacing);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: slideInDown 0.5s ease-out;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    position: relative;
    transform: translateZ(0);
}

.system-notifications::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 3s infinite;
    z-index: 1;
}

.critical-notifications {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    color: var(--white);
    border-left: 5px solid #fecaca;
    box-shadow: 0 15px 35px rgba(220, 38, 38, 0.4), 0 5px 15px rgba(0, 0, 0, 0.1);
}

.high-priority-notifications {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: var(--white);
    border-left: 5px solid #fef3c7;
    box-shadow: 0 15px 35px rgba(245, 158, 11, 0.4), 0 5px 15px rgba(0, 0, 0, 0.1);
}

.general-notifications {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: var(--white);
    border-left: 5px solid #dbeafe;
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.4), 0 5px 15px rgba(0, 0, 0, 0.1);
}

.notification-header {
    padding: 1.25rem 1.5rem;
    background: rgba(0, 0, 0, 0.15);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 2;
}

.notification-header strong {
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.notification-header .btn-close {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.9;
    transition: all 0.3s ease;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.notification-header .btn-close:hover {
    opacity: 1;
    transform: scale(1.1) rotate(90deg);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.notification-item {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.notification-item:last-child {
    border-bottom: none;
}

/* Estilos específicos para diferentes tipos de notificaciones */
.notification-item.critical {
    background: rgba(220, 38, 38, 0.1);
    border-left: 4px solid #fecaca;
}

.notification-item.critical:hover {
    background: rgba(220, 38, 38, 0.15);
    border-left-color: #fca5a5;
}

.notification-item.high-priority {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid #fef3c7;
}

.notification-item.high-priority:hover {
    background: rgba(245, 158, 11, 0.15);
    border-left-color: #fde68a;
}

.notification-item.general {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid #dbeafe;
}

.notification-item.general:hover {
    background: rgba(59, 130, 246, 0.15);
    border-left-color: #bfdbfe;
}

.notification-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.05);
}

.notification-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.notification-title i {
    margin-right: 0.75rem;
    font-size: 1.3rem;
    opacity: 0.9;
}

.notification-content {
    margin-bottom: 1rem;
    line-height: 1.6;
    opacity: 0.95;
    font-size: 1rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.notification-meta {
    font-size: 0.9rem;
    opacity: 0.85;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.notification-meta i {
    margin-right: 0.5rem;
    opacity: 0.8;
}

.notification-footer {
    padding: 1.25rem 1.5rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 2;
}

.notification-footer .btn {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.notification-footer .btn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    color: var(--white);
}

.notification-footer .btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

.notification-footer .btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== CONTADOR REGRESIVO ===== */
.countdown {
    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-700);
    transition: var(--transition);
}

.countdown-title {
    margin-bottom: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-100);
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
}

.countdown-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.countdown-label {
    font-size: 0.75rem;
    color: var(--gray-300);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Estados de advertencia del contador */
.countdown.countdown-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, var(--warning-dark) 100%);
    border-color: var(--warning-dark);
}

.countdown.countdown-warning .countdown-value {
    color: var(--white);
    animation: pulse 2s infinite;
}

.countdown.countdown-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, var(--danger-dark) 100%);
    border-color: var(--danger-dark);
    animation: shake 0.5s ease-in-out infinite alternate;
}

.countdown.countdown-danger .countdown-value {
    color: var(--white);
    animation: pulse 1s infinite;
}

@keyframes shake {
    0% { transform: translateX(0); }
    100% { transform: translateX(5px); }
}

/* ===== FORMULARIOS DE DESCARGA ===== */
.download-form {
    max-width: 600px;
    margin: 0 auto;
}

.download-history {
    margin-top: 2rem;
}

/* ===== UTILIDADES ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }
.ml-4 { margin-left: 1.5rem; }
.ml-5 { margin-left: 3rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }
.mr-4 { margin-right: 1.5rem; }
.mr-5 { margin-right: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.justify-content-start { justify-content: flex-start; }
.justify-content-end { justify-content: flex-end; }

.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.position-relative { position: relative; }
.position-absolute { position: absolute; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 1rem;
    }
}

@media (max-width: 992px) {
    .dashboard-stats {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .countdown-timer {
        gap: 1rem;
    }
    
    .countdown-item {
        min-width: 70px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 0.75rem;
        --section-spacing: 1.5rem;
    }
    
    .header-container {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .user-info {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .nav-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 0;
        padding: 0.5rem;
    }
    
    .nav-item {
        padding: 0.75rem 0.5rem;
        border-bottom: 2px solid transparent;
        border-radius: var(--border-radius);
        margin: 0.25rem;
        text-align: center;
    }
    
    .nav-item:hover, .nav-item.active {
        border-bottom-color: var(--primary-color);
        background-color: var(--gray-50);
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1.5rem;
    }
    
    .stat-card-value {
        font-size: 2rem;
    }
    
    .countdown {
        padding: 1.5rem;
    }
    
    .countdown-timer {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .countdown-item {
        min-width: auto;
    }
    
    .countdown-value {
        font-size: 1.5rem;
    }
    
    .table-responsive {
        font-size: 0.75rem;
        border-radius: var(--border-radius);
    }
    
    .table th, .table td {
        padding: 0.75rem 0.5rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.8rem;
    }
    
    .btn-sm {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .card-body, .card-header, .card-footer {
        padding: 1rem;
    }
    
    .alert {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    :root {
        --container-padding: 0.5rem;
        --section-spacing: 1rem;
    }
    
    .logo {
        font-size: 1.125rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-card-icon {
        font-size: 2rem;
    }
    
    .stat-card-value {
        font-size: 1.5rem;
    }
    
    .countdown {
        padding: 1rem;
    }
    
    .countdown-title {
        font-size: 1rem;
    }
    
    .countdown-value {
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }
    
    .btn-sm {
        padding: 0.375rem 0.75rem;
        font-size: 0.7rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
    
    .form-control {
        padding: 0.625rem 0.875rem;
        font-size: 0.8rem;
    }
    
    .badge {
        padding: 0.25rem 0.5rem;
        font-size: 0.7rem;
    }
}

/* ===== ANIMACIONES ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* ===== NOTIFICACIONES ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--primary-color);
    z-index: 9999;
    transform: translateX(100%);
    transition: var(--transition);
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    border-left-color: var(--success-color);
}

.notification-error {
    border-left-color: var(--danger-color);
}

.notification-warning {
    border-left-color: var(--warning-color);
}

.notification-info {
    border-left-color: var(--info-color);
}

.notification .btn-close {
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    margin-left: auto;
}

.notification .btn-close:hover {
    color: var(--gray-700);
}

/* ===== TOOLTIPS ===== */
.tooltip {
    position: absolute;
    background: var(--gray-900);
    color: var(--white);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    z-index: 1000;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
    max-width: 200px;
    word-wrap: break-word;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--gray-900);
}

/* ===== ESTADOS DE CARGA ===== */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ===== SCROLLBAR PERSONALIZADA ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* ===== SELECCIÓN DE TEXTO ===== */
::selection {
    background-color: var(--primary-color);
    color: var(--white);
}

::-moz-selection {
    background-color: var(--primary-color);
    color: var(--white);
}

/* ===== FOCUS VISIBLE ===== */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    .table {
        border: 1px solid var(--gray-300);
    }
    
    .table th, .table td {
        border: 1px solid var(--gray-300);
    }
}

/* ===== ESTILOS ADICIONALES PARA FORMULARIOS ===== */
.form-floating {
    position: relative;
}

.form-floating .form-control {
    height: calc(3.5rem + 2px);
    line-height: 1.25;
}

.form-floating label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.75rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity .1s ease-in-out, transform .1s ease-in-out;
}

.form-floating .form-control:focus,
.form-floating .form-control:not(:placeholder-shown) {
    padding-top: 1.625rem;
    padding-bottom: 0.625rem;
}

.form-floating .form-control:focus ~ label,
.form-floating .form-control:not(:placeholder-shown) ~ label {
    opacity: .65;
    transform: scale(.85) translateY(-0.5rem) translateX(0.15rem);
}

/* ===== ESTILOS PARA MODALES ===== */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-bottom: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.modal-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

/* ===== ESTILOS PARA SPINNERS ===== */
.spinner-border {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    vertical-align: text-bottom;
    border: 0.125em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border .75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

.spinner-border-sm {
    width: 0.875rem;
    height: 0.875rem;
    border-width: 0.1em;
}

/* ===== ESTILOS PARA UTILIDADES ADICIONALES ===== */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cursor-pointer {
    cursor: pointer;
}

.user-select-none {
    user-select: none;
}

.overflow-hidden {
    overflow: hidden;
}

.position-relative {
    position: relative;
}

.position-absolute {
    position: absolute;
}

.z-index-1000 {
    z-index: 1000;
}

.z-index-9999 {
    z-index: 9999;
}

/* ===== MEJORAS DE INTERFAZ ===== */
.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.table .btn-group {
    white-space: nowrap;
}

/* ===== MEJORAS DE ACCESIBILIDAD ===== */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ===== MEJORAS DE TRANSICIONES ===== */
.smooth-transition {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-2px);
    transition: transform 0.2s ease;
}

.hover-scale:hover {
    transform: scale(1.02);
    transition: transform 0.2s ease;
}

/* ===== ESTADOS DE FOCUS MEJORADOS ===== */
.form-group.focused .form-label {
    color: var(--primary-color);
    font-weight: 600;
}

.form-group.focused .form-control {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== LAZY LOADING PARA IMÁGENES ===== */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

img.lazy.loaded {
    opacity: 1;
}

/* ===== MEJORAS DE ACCESIBILIDAD ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===== INDICADORES DE ESTADO ===== */
.status-indicator {
    position: relative;
    display: inline-block;
}

.status-indicator::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
    border: 2px solid var(--white);
    z-index: 1;
}

.status-indicator.offline::before {
    background: var(--gray-400);
}

.status-indicator.busy::before {
    background: var(--warning-color);
}

.status-indicator.away::before {
    background: var(--danger-color);
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
    color: var(--gray-100);
    border-top: 3px solid var(--primary-color);
    margin-top: auto;
}

.footer .text-muted {
    color: var(--gray-300) !important;
}

.footer i {
    color: var(--primary-color);
}

/* ===== UTILIDADES ADICIONALES ===== */
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }
.gap-5 { gap: 3rem; }

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.border { border: 1px solid var(--gray-200); }
.border-0 { border: none; }

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-info { background-color: var(--info-color) !important; }

/* ===== ESTILOS PARA RESPONSIVE ADICIONALES ===== */
@media (max-width: 480px) {
    .countdown {
        padding: 1rem;
    }
    
    .countdown-timer {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .countdown-item {
        min-width: 60px;
        padding: 0.5rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: var(--border-radius);
    }
    
    .countdown-value {
        font-size: 1.25rem;
    }
    
    .countdown-label {
        font-size: 0.7rem;
    }
    
    .notification {
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .nav-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .btn-group {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .btn-group .btn {
        border-radius: var(--border-radius);
        margin: 0;
    }
    
    /* Estilos responsivos para notificaciones */
    .system-notifications {
        margin-bottom: 1rem;
        border-radius: var(--border-radius-md);
    }
    
    .notification-header {
        padding: 1rem;
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .notification-header strong {
        font-size: 1rem;
    }
    
    .notification-header .btn-close {
        align-self: flex-end;
        margin-top: -0.5rem;
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }
    
    .notification-item {
        padding: 1rem;
    }
    
    .notification-title {
        font-size: 1.1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .notification-content {
        font-size: 0.95rem;
    }
    
    .notification-meta {
        font-size: 0.8rem;
        gap: 0.5rem;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .notification-footer {
        padding: 1rem;
    }
    
    .notification-footer .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
        width: 100%;
    }
}

/* ===== ANIMACIONES ===== */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

@media (max-width: 360px) {
    .countdown-timer {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .countdown-item {
        min-width: auto;
        flex-direction: row;
        gap: 0.5rem;
    }
    
    .countdown-value {
        font-size: 1rem;
    }
    
    .countdown-label {
        font-size: 0.65rem;
    }
}

/* ===== NOTIFICACIÓN ÚNICA DEL SISTEMA ===== */
.system-notification {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    margin: 20px 0;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
    border-left: 6px solid #ffd700;
    position: relative;
    overflow: hidden;
    animation: slideInDown 0.6s ease-out;
}

.system-notification::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 3s infinite;
    z-index: 1;
}

.system-notification-header {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px 20px;
    margin: -20px -20px 20px -20px;
    border-radius: 15px 15px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 2;
}

.system-notification-header strong {
    font-size: 1.3rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.system-notification-header .btn-close {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0.9;
    transition: all 0.3s ease;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.system-notification-header .btn-close:hover {
    opacity: 1;
    transform: scale(1.1) rotate(90deg);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.system-notification-content {
    padding: 15px 0;
    position: relative;
    z-index: 2;
}

.system-notification-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.system-notification-text {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 15px;
    opacity: 0.95;
}

.system-notification-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    opacity: 0.8;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 15px;
}

.system-notification-meta i {
    margin-right: 5px;
    opacity: 0.8;
}

/* Animaciones */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .system-notification {
        margin: 15px 0;
        padding: 15px;
    }
    
    .system-notification-header {
        padding: 12px 15px;
        margin: -15px -15px 15px -15px;
    }
    
    .system-notification-header strong {
        font-size: 1.1rem;
    }
    
    .system-notification-title {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .system-notification {
        margin: 10px 0;
        padding: 12px;
    }
    
    .system-notification-header {
        padding: 10px 12px;
        margin: -12px -12px 12px -12px;
    }
    
    .system-notification-header strong {
        font-size: 1rem;
    }
    
    .system-notification-title {
        font-size: 1rem;
    }
    
    .system-notification-text {
        font-size: 0.9rem;
    }
}

/* ===== TRANSICIONES DE PÁGINA SUAVES (NO INTRUSIVAS) ===== */
body.fade-out {
	opacity: 1;
	transition: none;
}

body.fade-in {
	animation: none;
}