/* ============================================
   通用 UI 样式
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-danger {
    background: var(--error-color);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background: #ff7875;
}

.btn-success {
    background: var(--success-color);
    color: #fff;
}

.btn-success:hover:not(:disabled) {
    background: #73d13d;
}

.btn-small {
    padding: 4px 12px;
    font-size: 12px;
}

.btn-sm {
    padding: 3px 10px;
    font-size: 12px;
}

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

.btn-outline:hover {
    background: var(--bg-hover, #f0f0f0);
}

.level-config-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 12px;
}

.level-config-item {
    background: #fafafa;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
}

.level-config-item h5 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.level-config-item .form-group {
    margin-bottom: 12px;
}

.level-config-item .form-group:last-child {
    margin-bottom: 0;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 14px;
}

.chart-container {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    min-height: 300px;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}