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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    color: #2c3e50;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px 0;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 {
    margin-bottom: 5px;
}

header p {
    opacity: 0.9;
    font-size: 14px;
}

.section {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.section h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 20px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    transition: margin-bottom 0.3s, padding-bottom 0.3s, border-bottom 0.3s;
}

.section:has(.section-content.collapsed) h2 {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

textarea, input[type="text"], input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

textarea:focus, input:focus {
    outline: none;
    border-color: #667eea;
}

textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    background: #667eea;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background: #5568d3;
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.page-number {
    display: inline-block;
    padding: 6px 12px;
    margin: 0 2px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.page-number:hover {
    background: #f0f0f0;
    border-color: #3498db;
}

.page-number.active {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.page-number.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.section-header {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color 0.2s;
}

.section-header:hover {
    color: #3498db;
}

.section-toggle {
    display: inline-block;
    margin-left: 8px;
    transition: transform 0.3s;
    font-size: 0.8em;
}

.section-content {
    max-height: 5000px;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out, margin 0.3s ease-out;
    opacity: 1;
    margin-top: 15px;
}

.section-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
}

tr:hover {
    background: #f8f9fa;
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    background: #667eea;
    color: white;
    border-radius: 3px;
    font-size: 11px;
    margin-right: 4px;
}

.alert {
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.stat-card h3 {
    font-size: 32px;
    margin-bottom: 5px;
}

.stat-card p {
    opacity: 0.9;
    font-size: 14px;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.loading.active {
    display: block;
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #999;
}

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

a {
    color: #667eea;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.no-data {
    text-align: center;
    padding: 30px;
    color: #999;
    font-style: italic;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #666;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Scrollable table */
.table-scroll {
    max-height: 300px;
    overflow-y: auto;
    margin-top: 15px;
    border: 1px solid #f0f0f0;
    border-radius: 5px;
}

.table-scroll table {
    margin-top: 0;
}

.table-scroll thead th {
    position: sticky;
    top: 0;
    background: #f8f9fa;
    z-index: 10;
}