/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 5px 12px;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
}

.btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-light);
}

.btn:active {
    background-color: var(--bg-active);
}

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

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

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

.btn-danger:hover {
    background-color: #d4634f;
    border-color: #d4634f;
}

.btn-sm {
    padding: 2px 8px;
    font-size: var(--font-size-xs);
}

/* 输入框 */
.input {
    display: inline-block;
    padding: 4px 8px;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
    width: 100%;
}

.input:focus {
    border-color: var(--accent-primary);
}

.input::placeholder {
    color: var(--text-muted);
}

/* 下拉选择 */
.select {
    display: inline-block;
    padding: 4px 24px 4px 8px;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23888899' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    width: 100%;
}

.select:focus {
    border-color: var(--accent-primary);
}

/* 颜色选择器 */
.color-picker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.color-picker-preview {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    cursor: pointer;
    background-image:
        linear-gradient(45deg, var(--canvas-grid) 25%, transparent 25%),
        linear-gradient(-45deg, var(--canvas-grid) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--canvas-grid) 75%),
        linear-gradient(-45deg, transparent 75%, var(--canvas-grid) 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
    position: relative;
    overflow: hidden;
}

.color-picker-preview-inner {
    position: absolute;
    inset: 0;
    border-radius: inherit;
}

.color-picker input[type="color"] {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
    pointer-events: none;
}

/* 滑块容器 */
.slider-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
}

.slider-wrap input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
}

.slider-wrap input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    cursor: pointer;
    border: 1px solid var(--bg-primary);
}

.slider-wrap input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    cursor: pointer;
    border: 1px solid var(--bg-primary);
}

.slider-wrap .slider-value {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    min-width: 28px;
    text-align: right;
}

/* 面板 */
.panel {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--panel-title-height);
    padding: 0 8px;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    flex-shrink: 0;
}

.panel-title-actions {
    display: flex;
    align-items: center;
    gap: 2px;
}

.panel-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
}

.panel-footer {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 4px 6px;
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* 工具提示 */
.tooltip {
    position: absolute;
    z-index: 9999;
    padding: 4px 8px;
    font-size: var(--font-size-xs);
    color: #fff;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    pointer-events: none;
    white-space: nowrap;
}

/* 分隔线 */
.separator {
    width: 1px;
    height: 16px;
    margin: 0 6px;
    background-color: var(--border-color);
}

/* 图标按钮 */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

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