/* ======= 在线抠图工具样式 ======= */

.tool-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-light);
}

.tool-title-wrapper i {
    font-size: 2rem;
    color: var(--primary-color);
}

.tool-title-wrapper .tool-title {
    margin-bottom: 0;
    border-bottom: none;
}

/* 上传区 */
.bg-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md, 12px);
    background: var(--bg-light);
    padding: 38px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.bg-dropzone:hover,
.bg-dropzone.is-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.bg-drop-icon {
    font-size: 2.6rem;
    color: var(--primary-color);
    display: block;
    margin-bottom: 10px;
}

.bg-drop-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.bg-drop-note {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 工作区 */
.bg-workspace {
    margin-top: 4px;
}

.bg-canvas-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.bg-canvas-box {
    flex: 1 1 300px;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.bg-canvas-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.bg-canvas-wrap {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-light);
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    overflow: hidden;
}

.bg-canvas-wrap canvas {
    max-width: 100%;
    height: auto;
    display: block;
}

#bgPickerWrap {
    cursor: crosshair;
}

/* 透明格子底纹 */
.bg-alpha-grid {
    background-image:
        linear-gradient(45deg, #d8d8d8 25%, transparent 25%, transparent 75%, #d8d8d8 75%),
        linear-gradient(45deg, #d8d8d8 25%, transparent 25%, transparent 75%, #d8d8d8 75%);
    background-size: 16px 16px;
    background-position: 0 0, 8px 8px;
    background-color: #ffffff;
}

.bg-canvas-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    line-height: 1.6;
}

/* 控制区 */
.bg-controls {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.bg-control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.bg-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.bg-value {
    display: inline-block;
    min-width: 30px;
    padding: 1px 7px;
    margin-left: 4px;
    border-radius: 4px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    text-align: center;
}

.bg-slider-row {
    margin-bottom: 14px;
}

.bg-slider-row input[type="range"] {
    width: 100%;
    margin-top: 6px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.bg-slider-note {
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.bg-key-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.bg-swatches {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    min-height: 26px;
}

.bg-swatch {
    display: inline-block;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    border: 1px solid rgba(0, 0, 0, 0.18);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.bg-swatch-empty {
    font-size: 12px;
    color: var(--text-secondary);
}

.bg-mini-btn {
    padding: 6px 12px;
    font-size: 13px;
}

.bg-fill-row,
.bg-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.bg-actions {
    padding-top: 14px;
    border-top: 1px dashed var(--border-color);
    margin-bottom: 10px;
}

.bg-format-wrap {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.form-select {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-white);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.form-select:hover,
.form-select:focus {
    border-color: var(--primary-color);
    outline: none;
}

.bg-select {
    padding: 8px 10px;
    font-size: 13px;
}

.bg-color-input {
    width: 44px;
    height: 34px;
    padding: 2px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-white);
    cursor: pointer;
}

.bg-quality {
    width: 130px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.bg-stat-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    padding-top: 10px;
    border-top: 1px dashed var(--border-color);
}

.bg-stat {
    font-size: 12px;
    color: var(--text-secondary);
}

.bg-stat b {
    color: var(--text-primary);
    font-family: 'Consolas', 'Monaco', monospace;
}

/* 错误/提示 */
.error-tip {
    min-height: 20px;
    margin: 8px 0 2px;
    color: #e74c3c;
    font-size: 14px;
    text-align: center;
    font-weight: 500;
}

.bg-tip {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.7;
}

/* 响应式 */
@media (max-width: 768px) {
    .bg-canvas-row {
        flex-direction: column;
    }

    .bg-canvas-wrap {
        min-height: 160px;
    }

    .bg-actions,
    .bg-fill-row {
        gap: 8px;
    }

    .bg-quality {
        width: 100%;
    }
}