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

:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --background: #F9FAFB;
    --card-background: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
}

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

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-box h1 {
    font-size: 28px;
    margin-bottom: 8px;
    text-align: center;
    color: var(--primary-color);
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.login-info {
    margin-top: 20px;
    padding: 15px;
    background: #F3F4F6;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.login-info p {
    margin: 5px 0;
}

/* Admin Container */
.admin-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.admin-header {
    background: var(--card-background);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 40px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header h1 {
    font-size: 24px;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Content */
.admin-content {
    flex: 1;
    padding: 40px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-background);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    font-size: 36px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Panel */
.panel {
    background: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    overflow: hidden;
}

.panel-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    background: #F9FAFB;
}

.panel-header h2 {
    font-size: 20px;
    color: var(--text-primary);
}

.panel-body {
    padding: 30px;
}

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

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

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

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea.form-control {
    resize: vertical;
    font-family: inherit;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.form-section h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.action-item {
    padding: 20px;
    background: #F9FAFB;
    border-radius: 8px;
    margin-bottom: 15px;
}

.form-actions {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

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

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

.btn-secondary:hover {
    background: #4B5563;
}

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

.btn-danger:hover {
    background: #DC2626;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #D1FAE5;
    border-color: var(--success-color);
    color: #065F46;
}

.alert-error {
    background: #FEE2E2;
    border-color: var(--danger-color);
    color: #991B1B;
}

/* Notification Preview */
.notification-preview {
    max-width: 400px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    gap: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.preview-icon img {
    width: 64px;
    height: 64px;
    border-radius: 8px;
}

.preview-content {
    flex: 1;
}

.preview-title {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.preview-body {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.preview-image {
    margin-top: 12px;
}

.preview-image img {
    width: 100%;
    border-radius: 8px;
}

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

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

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: #F9FAFB;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tbody tr:hover {
    background: #F9FAFB;
}

.data-table code {
    background: #F3F4F6;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-family: monospace;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #D1FAE5;
    color: #065F46;
}

.badge-secondary {
    background: #E5E7EB;
    color: #4B5563;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-header {
        padding: 16px 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .admin-content {
        padding: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }
}