:root {
    --primary-color: #ff6b35;
    --secondary-color: #2ec4b6;
    --dark-color: #1e1e2f;
    --light-color: #f8f9fa;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --sidebar-width: 250px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    background: #f5f5f5;
    min-height: 100vh;
}

/* Layout principal */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar moderno */
.sidebar {
    width: var(--sidebar-width);
    background: var(--dark-color);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: all 0.3s;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h3 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 24px;
}

.sidebar-menu {
    padding: 20px 0;
}

.sidebar-menu ul {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 12px 25px;
    color: #a0a0a0;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 4px solid transparent;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(255,107,53,0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-menu i {
    margin-right: 10px;
    width: 20px;
    font-size: 18px;
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 20px;
}

/* Top navbar */
.top-navbar {
    background: white;
    padding: 15px 30px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.search-bar {
    display: flex;
    align-items: center;
    background: #f5f5f5;
    border-radius: 8px;
    padding: 8px 15px;
    width: 300px;
}

.search-bar i {
    color: #888;
    margin-right: 10px;
}

.search-bar input {
    border: none;
    background: transparent;
    outline: none;
    width: 100%;
    font-size: 14px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notifications {
    position: relative;
}

.notifications i {
    font-size: 20px;
    color: #666;
    cursor: pointer;
}

.badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), #ff8c5a);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-title h1 {
    font-size: 28px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.page-title p {
    color: #666;
    font-size: 14px;
}

/* Cards de dashboard */
.dashboard-cards, .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.stat-info h3 {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-info .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark-color);
}

.stat-info small {
    font-size: 12px;
    color: #999;
}

.stat-change {
    font-size: 12px;
}

.stat-change.positive {
    color: var(--success-color);
}

.stat-change.negative {
    color: var(--danger-color);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--primary-color), #ff8c5a);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    margin-bottom: 25px;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 18px;
    color: var(--dark-color);
}

.card-body {
    padding: 20px;
}

/* Tablas modernas */
.table-container, .table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    text-align: left;
    padding: 12px 15px;
    background: #f8f9fa;
    color: #666;
    font-weight: 600;
    font-size: 14px;
}

.table td {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
    color: #444;
    font-size: 14px;
}

.table tr:hover {
    background: #f8f9fa;
}

.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

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

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

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

/* Badges */
.badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

.badge-secondary {
    background: #e2e3e5;
    color: #383d41;
}

/* Formularios modernos */
.modern-form, .form {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #666;
    font-weight: 500;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row .form-group {
    flex: 1;
}

/* Botones */
.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #e55a2b;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-icon {
    padding: 5px 10px;
    border: none;
    background: none;
    cursor: pointer;
    color: #666;
    transition: color 0.3s;
}

.btn-icon:hover {
    color: var(--primary-color);
}

/* Alertas */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffeeba;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

/* Progress bars */
.progress {
    background: #e9ecef;
    border-radius: 4px;
    height: 20px;
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-color);
    height: 100%;
    color: white;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: width 0.3s;
}

.progress-bar.bg-success {
    background: var(--success-color);
}

.progress-bar.bg-warning {
    background: var(--warning-color);
}

.progress-bar.bg-danger {
    background: var(--danger-color);
}

/* Paginación */
.pagination {
    margin-top: 20px;
    text-align: center;
}

.btn-pagination {
    display: inline-block;
    padding: 8px 12px;
    margin: 0 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #666;
    transition: all 0.3s;
}

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

.btn-pagination:hover {
    background: #f0f0f0;
}

/* Modales */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 50px auto;
    padding: 20px;
    border-radius: 10px;
    width: 500px;
    max-width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.close {
    font-size: 24px;
    cursor: pointer;
    border: none;
    background: none;
    color: #999;
}

.close:hover {
    color: var(--danger-color);
}

.modal-footer {
    margin-top: 20px;
    padding-top: 10px;
    border-top: 1px solid #eee;
    text-align: right;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        left: -250px;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .top-navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-bar {
        width: 100%;
    }
}