:root {
    /* Color Palette - Modern Dark Theme */
    --admin-bg-color: #0f172a; /* Slate 900 */
    --admin-card-bg: #1e293b; /* Slate 800 */
    --admin-text-primary: #f8fafc; /* Slate 50 */
    --admin-text-secondary: #94a3b8; /* Slate 400 */
    --admin-border-color: #334155; /* Slate 700 */
    
    --admin-primary: #3b82f6; /* Blue 500 */
    --admin-primary-hover: #2563eb; /* Blue 600 */
    --admin-danger: #ef4444; /* Red 500 */
    --admin-danger-hover: #dc2626; /* Red 600 */
    --admin-success: #10b981; /* Emerald 500 */
    
    --admin-radius: 8px;
    --admin-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --admin-transition: all 0.2s ease-in-out;
}

body {
    background-color: var(--admin-bg-color);
    color: var(--admin-text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Layout */
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--admin-border-color);
}

.admin-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--admin-text-primary);
    margin: 0;
}

/* Sections & Cards */
.admin-section {
    margin-bottom: 40px;
}

.admin-section h2 {
    font-size: 1.4rem;
    color: var(--admin-text-primary);
    margin-bottom: 20px;
    font-weight: 600;
}

.admin-card {
    background-color: var(--admin-card-bg);
    border-radius: var(--admin-radius);
    padding: 24px;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border-color);
}

/* Tables */
.admin-table-container {
    background-color: var(--admin-card-bg);
    border-radius: var(--admin-radius);
    overflow: hidden;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border-color);
}

.admin-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.admin-table th {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--admin-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--admin-border-color);
}

.admin-table td {
    padding: 16px;
    border-bottom: 1px solid var(--admin-border-color);
    color: var(--admin-text-primary);
    font-size: 0.95rem;
    vertical-align: middle;
}

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

.admin-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Buttons */
.admin-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--admin-radius);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--admin-transition);
    border: none;
    cursor: pointer;
    line-height: 1;
}

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

.admin-btn-primary:hover {
    background-color: var(--admin-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.5);
}

.admin-btn-danger {
    background-color: transparent;
    color: var(--admin-danger);
    border: 1px solid var(--admin-danger);
}

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

.admin-btn-secondary {
    background-color: transparent;
    color: var(--admin-text-secondary);
    border: 1px solid var(--admin-border-color);
}

.admin-btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--admin-text-primary);
    border-color: var(--admin-text-secondary);
}

/* Forms */
.admin-form {
    background-color: var(--admin-card-bg);
    padding: 40px;
    border-radius: var(--admin-radius);
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border-color);
    max-width: 600px;
    margin: 0 auto;
}

.admin-form h2 {
    margin-top: 0;
    margin-bottom: 30px;
    text-align: center;
    font-size: 1.5rem;
}

.admin-form-group {
    margin-bottom: 24px;
}

.admin-form label {
    display: block;
    margin-bottom: 8px;
    color: var(--admin-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.admin-form input[type="text"],
.admin-form input[type="password"],
.admin-form input[type="number"],
.admin-form input[type="file"],
.admin-form select,
.admin-form textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--admin-border-color);
    border-radius: var(--admin-radius);
    color: var(--admin-text-primary);
    font-size: 1rem;
    transition: var(--admin-transition);
    box-sizing: border-box;
}

.admin-form input:focus,
.admin-form select:focus,
.admin-form textarea:focus {
    outline: none;
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.admin-form textarea {
    min-height: 120px;
    resize: vertical;
}

.admin-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 30px;
}

/* Login Page */
.admin-login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.admin-login-form {
    width: 100%;
    max-width: 400px;
    background-color: var(--admin-card-bg);
    padding: 40px;
    border-radius: var(--admin-radius);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--admin-border-color);
}

.admin-login-form h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--admin-text-primary);
}

.admin-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--admin-danger);
    padding: 12px;
    border-radius: var(--admin-radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .admin-header-actions {
        width: 100%;
        display: flex;
        gap: 10px;
    }
    
    .admin-btn {
        flex: 1;
        text-align: center;
    }
    
    .admin-table-container {
        overflow-x: auto;
    }
    
    .admin-table th, 
    .admin-table td {
        padding: 12px;
        white-space: nowrap;
    }
}