/**
 * ============================================================================
 * assets/css/tool-remove-bg.css - [배경 제거·바꾸기] 전용 격리 스타일시트
 * ============================================================================
 * [네임스페이스]: .tool-remove-bg 하위 선택자로만 한정되어 다른 도구와 충돌하지 않습니다.
 */

/* 캔버스 작업 영역 컨테이너 */
.tool-remove-bg .remove-bg-workspace {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

/* 캔버스 상단 플로팅 툴바 */
.tool-remove-bg .canvas-floating-toolbar {
    display: flex;
    align-items: center;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    padding: 4px 8px;
    gap: 6px;
    z-index: 5;
    flex-wrap: wrap;
    justify-content: center;
}

.tool-remove-bg .canvas-tool-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.tool-remove-bg .canvas-tool-divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
    margin: 0 4px;
}

.tool-remove-bg .tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}

.tool-remove-bg .tool-btn svg {
    width: 16px;
    height: 16px;
}

.tool-remove-bg .tool-btn:hover:not(:disabled) {
    background-color: var(--bg-muted);
    color: var(--text-primary);
}

.tool-remove-bg .tool-btn.active {
    background-color: #ede9fe;
    color: #7c3aed;
    border-color: #c4b5fd;
    font-weight: 700;
}

.tool-remove-bg .tool-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 체커보드 (투명 격자 배경) 캔버스 래퍼 */
.tool-remove-bg .remove-bg-canvas-wrapper {
    max-width: 100%;
    width: 100%;
    min-height: 380px;
    max-height: 560px;
    overflow: auto;
    background-color: #ffffff;
    background-image: 
        linear-gradient(45deg, #e2e8f0 25%, transparent 25%), 
        linear-gradient(-45deg, #e2e8f0 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #e2e8f0 75%), 
        linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.08);
    position: relative;
    cursor: default;
}

.tool-remove-bg #remove-bg-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    user-select: none;
    border-radius: 4px;
    background-color: transparent;
}

/* 브러시 크기 원형 커서 가이드 */
.tool-remove-bg .brush-cursor {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
    z-index: 20;
    transition: width 0.05s, height 0.05s;
}

.tool-remove-bg .brush-cursor.erase {
    border: 2px dashed #ef4444;
    background: rgba(239, 68, 68, 0.15);
}

.tool-remove-bg .brush-cursor.restore {
    border: 2px dashed #10b981;
    background: rgba(16, 185, 129, 0.15);
}

/* 로딩 스피너 오버레이 */
.tool-remove-bg .ai-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    border-radius: var(--radius-md);
    z-index: 30;
}

.tool-remove-bg .ai-loading-spinner {
    width: 42px;
    height: 42px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

.tool-remove-bg .ai-loading-text {
    font-size: 14px;
    font-weight: 700;
}

.tool-remove-bg .ai-loading-subtext {
    font-size: 12px;
    color: #cbd5e1;
    margin-top: 4px;
}

/* 사이드바 대형 [자동 배경 제거] 버튼 */
.tool-remove-bg .btn-auto-remove {
    width: 100%;
    padding: 13px;
    background-color: #8b5cf6;
    color: #ffffff;
    font-size: 15px;
    font-weight: 800;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    transition: all 0.2s;
}

.tool-remove-bg .btn-auto-remove:hover:not(:disabled) {
    background-color: #7c3aed;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(139, 92, 246, 0.4);
}

.tool-remove-bg .btn-auto-remove:disabled {
    background-color: #cbd5e1;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.tool-remove-bg .engine-tip-text {
    font-size: 11.5px;
    color: var(--text-muted);
    line-height: 1.4;
    margin-top: 6px;
}

/* 슬라이더 라벨 및 수치 배지 행 */
.tool-remove-bg .setting-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.tool-remove-bg .setting-label-row .setting-label {
    margin-bottom: 0;
}

.tool-remove-bg .range-val-badge {
    font-size: 11.5px;
    font-weight: 700;
    color: #7c3aed;
    background: #ede9fe;
    padding: 2px 8px;
    border-radius: 12px;
}

/* 배경 색상 선택 박스 */
.tool-remove-bg .color-select-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #ffffff;
    margin-bottom: 8px;
}

.tool-remove-bg .color-select-box input[type="color"] {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
    padding: 0;
}

.tool-remove-bg .color-select-box span {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* 추천 컬러 칩 팔레트 */
.tool-remove-bg .color-preset-chips {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.tool-remove-bg .color-chip {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    outline: none;
}

.tool-remove-bg .color-chip:hover {
    transform: scale(1.15);
}

.tool-remove-bg .color-chip.active {
    box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px #7c3aed;
}

/* 배경 사진 선택 커스텀 파일 버튼 */
.tool-remove-bg .bg-image-upload-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-remove-bg .btn-file-select {
    padding: 6px 12px;
    font-size: 12.5px;
    font-weight: 600;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
}

.tool-remove-bg .btn-file-select:hover {
    background: var(--bg-muted);
}

.tool-remove-bg .file-name-label {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

/* 수동 보정 리셋 버튼 */
.tool-remove-bg .btn-reset-brush {
    width: 100%;
    padding: 8px;
    font-size: 13px;
    font-weight: 600;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: background 0.15s;
}

.tool-remove-bg .btn-reset-brush svg {
    width: 15px;
    height: 15px;
}

.tool-remove-bg .btn-reset-brush:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}

/* 체크박스 행 */
.tool-remove-bg .checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.tool-remove-bg .checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 모바일 반응형 */
@media (max-width: 768px) {
    .tool-remove-bg .canvas-floating-toolbar {
        flex-wrap: wrap;
        width: 100%;
        justify-content: center;
        gap: 6px;
    }

    .tool-remove-bg .remove-bg-canvas-wrapper {
        min-height: 280px;
        max-height: 420px;
    }

    .tool-remove-bg .color-palette-chips {
        grid-template-columns: repeat(4, 1fr);
    }
}