:root {
    /* Brand Colors - FIAO */
    --primary: #FF273B;
    --primary-dark: #CC1F2F;
    --primary-light: #FFE5E7;
    
    /* Layout */
    --sidebar-width: 250px;
    --header-height: 64px;
    
    /* Backgrounds & Text */
    --bg-main: #f9fafb;
    --bg-surface: #ffffff;
    --bg-sidebar: #212121; /* Adjusted to new primary dark */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-inverse: #ffffff;
    
    /* Borders */
    --border-color: #e5e7eb;
    
    /* Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    
    /* Metrics */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 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);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* Helpers */
.text-primary { color: var(--primary); }

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

/* Sidebar */
.admin-sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: var(--text-inverse);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    gap: 12px;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-inverse);
    border-left: 4px solid var(--primary);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border: none;
    cursor: pointer;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
    font-family: inherit;
}

.logout-btn:hover {
    color: var(--text-inverse);
}

/* Main Content */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Header */
.admin-header {
    height: 72px;
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
}

.admin-user {
    font-weight: 500;
    color: var(--text-primary);
}

/* Content Area */
.admin-content {
    padding: 24px;
    flex: 1;
    overflow-y: auto;
}

/* Alerts */
.alert {
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-weight: 500;
}

.alert-success {
    background-color: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: var(--danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* UI Components */
.card {
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    border: 1px solid transparent;
    font-family: inherit;
    gap: 8px;
}

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

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

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 13px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

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

.table th, .table td {
    padding: 12px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: #f9fafb;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.table td {
    font-size: 14px;
    color: var(--text-primary);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: #f9fafb;
}

.badge {
    padding: 4px 8px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background-color: var(--success-light);
    color: #065f46;
}

.badge-secondary {
    background-color: #f3f4f6;
    color: #374151;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.text-danger {
    color: var(--danger);
    font-size: 13px;
    margin-top: 4px;
    display: block;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .admin-sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
        box-shadow: 4px 0 10px rgba(0,0,0,0.1);
    }
}