/* public/assets/css/tools/image/photo-collage.css */
.icb-wrap {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.icb-topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 0 24px 0; border-bottom: 1px solid var(--border-color); margin-bottom: 24px;
    flex-wrap: wrap; gap: 16px;
}
.icb-header-text h1 { font-size: 1.5rem; margin: 0 0 6px; color: var(--text-main); font-weight: 700;}
.icb-header-text p { margin: 0; font-size: 0.95rem; color: var(--text-muted); }

.icb-btn {
    display: inline-flex; align-items: center; gap: 6px; justify-content: center;
    border: 1px solid var(--border-color); background: var(--bg-surface); color: var(--text-main);
    padding: 10px 18px; border-radius: 10px; font-size: 0.95rem; font-weight: 600;
    cursor: pointer; transition: 0.15s; white-space: nowrap; box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.icb-btn:hover { background: var(--bg-body); border-color: var(--primary-color); color: var(--primary-color);}
.icb-btn:active { transform: scale(.98); }
.icb-btn:disabled { opacity: .45; cursor: not-allowed; }
.icb-btn.icb-primary { background: linear-gradient(135deg, var(--primary-color), var(--primary-hover)); color: #fff; border: none; box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.3);}
.icb-btn.icb-primary:hover { filter: brightness(1.1); color: #fff; }
.icb-btn.icb-small { padding: 6px 12px; font-size: 0.85rem; }
.icb-btn svg { width: 18px; height: 18px; }

.icb-layout { display: grid; grid-template-columns: 350px minmax(0, 1fr); gap: 24px; align-items: start;}

.icb-panel {
    background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 16px;
    padding: 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); max-height: 80vh; overflow-y: auto;
}
.icb-panel::-webkit-scrollbar { width: 6px; }
.icb-panel::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.icb-section { margin-bottom: 24px; }
.icb-section h2 { font-size: 1rem; font-weight: 700; color: var(--text-main); margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between; }
.icb-section h2 .icb-count { font-weight: 500; font-size: 0.85rem; color: var(--text-muted); }

/* 照片池 */
.icb-photo-pool { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.icb-pool-item { position: relative; aspect-ratio: 1; border-radius: 10px; overflow: hidden; cursor: grab; background: var(--bg-body); border: 2px solid transparent; transition: 0.15s; user-select: none; touch-action: none; }
.icb-pool-item img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.icb-pool-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,.1); }
.icb-pool-item.selected { border-color: var(--primary-color); }
.icb-pool-item.selected:hover { box-shadow: 0 4px 15px rgba(var(--primary-rgb),.3); }
.icb-pool-item.drag-over { border-color: #ff9f43; box-shadow: 0 0 0 3px rgba(255,159,67,.3); }
.icb-pool-item .icb-badge { position: absolute; top: 4px; left: 4px; min-width: 20px; height: 20px; padding: 0 6px; background: var(--primary-color); color: #fff; font-size: 0.75rem; font-weight: 700; line-height: 20px; text-align: center; border-radius: 10px; pointer-events: none; }
.icb-pool-item .icb-plus { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,.4); color: #fff; font-size: 24px; font-weight: 300; opacity: 0; transition: .15s; pointer-events: none; }
.icb-pool-item:hover .icb-plus { opacity: 1; }
.icb-pool-item .icb-remove { position: absolute; top: 4px; right: 4px; width: 22px; height: 22px; border-radius: 50%; border: 0; background: rgba(0,0,0,.7); color: #fff; font-size: 0.75rem; cursor: pointer; display: none; align-items: center; justify-content: center; transition: 0.2s;}
.icb-pool-item.selected .icb-remove { display: flex; }
.icb-pool-item .icb-remove:hover { background: var(--danger); }
.icb-pool-item .icb-vbadge { position: absolute; bottom: 4px; left: 4px; background: rgba(0,0,0,.6); color: #fff; font-size: 0.7rem; padding: 2px 6px; border-radius: 4px; pointer-events: none; }

.icb-empty-pool { grid-column: 1 / -1; padding: 28px 10px; text-align: center; border: 2px dashed var(--border-color); border-radius: 12px; color: var(--text-muted); font-size: 0.9rem; cursor: pointer; transition: .15s; }
.icb-empty-pool:hover { border-color: var(--primary-color); color: var(--primary-color); background: rgba(var(--primary-rgb), 0.05); }

/* 布局 */
.icb-layout-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.icb-layout-btn { border: 2px solid var(--border-color); background: var(--bg-body); border-radius: 10px; padding: 8px 4px; cursor: pointer; transition: .15s; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.icb-layout-btn:hover { border-color: var(--primary-color); }
.icb-layout-btn.active { border-color: var(--primary-color); background: rgba(var(--primary-rgb), 0.05); }
.icb-layout-btn canvas { width: 44px; height: 44px; border-radius: 6px; }
.icb-layout-btn span { font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.icb-layout-btn.active span { color: var(--primary-color); font-weight: 600; }

/* 比例 */
.icb-ratio-list { display: flex; gap: 10px; flex-wrap: wrap; }
.icb-ratio-btn { flex: 1; min-width: 54px; padding: 8px 6px; border: 2px solid var(--border-color); background: var(--bg-body); border-radius: 10px; cursor: pointer; transition: .15s; font-size: 0.85rem; font-weight: 600; color: var(--text-muted); text-align: center;}
.icb-ratio-btn:hover { border-color: var(--primary-color); color: var(--primary-color);}
.icb-ratio-btn.active { border-color: var(--primary-color); background: rgba(var(--primary-rgb), 0.1); color: var(--primary-color); }

.icb-slider-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.icb-slider-row label { font-size: 0.85rem; color: var(--text-muted); width: 64px; flex: none; font-weight: 500;}
.icb-slider-row input[type="range"] { flex: 1; -webkit-appearance: none; appearance: none; height: 6px; border-radius: 3px; background: var(--border-color); outline: none; }
.icb-slider-row input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--primary-color); border: 3px solid var(--bg-surface); cursor: pointer; box-shadow: 0 2px 6px rgba(0,0,0,.3); }
.icb-slider-row .icb-val { font-size: 0.85rem; color: var(--text-main); width: 34px; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600;}

.icb-checkbox-row { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.85rem; padding: 6px 0; color: var(--text-main); font-weight: 500;}
.icb-checkbox-row input { width: 16px; height: 16px; accent-color: var(--primary-color); cursor: pointer; }

.icb-segmented { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--bg-body); padding: 4px; border-radius: 10px; margin-bottom: 16px; border: 1px solid var(--border-color);}
.icb-segmented button { border: 0; background: transparent; padding: 8px; border-radius: 8px; font-size: 0.85rem; color: var(--text-muted); cursor: pointer; transition: .15s; font-weight: 500;}
.icb-segmented button.active { background: var(--bg-surface); color: var(--primary-color); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.1); }

.icb-color-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; margin-bottom: 12px; }
.icb-color-swatch { aspect-ratio: 1; border-radius: 6px; cursor: pointer; border: 2px solid transparent; transition: 0.15s; position: relative; box-shadow: 0 1px 3px rgba(0,0,0,0.1);}
.icb-color-swatch:hover { transform: scale(1.15); z-index: 2;}
.icb-color-swatch.active { border-color: var(--primary-color); box-shadow: 0 0 0 2px var(--bg-surface) inset; }

.icb-custom-color { display: flex; align-items: center; gap: 10px; }
.icb-custom-color input[type="color"] { width: 40px; height: 32px; border: 1px solid var(--border-color); border-radius: 8px; cursor: pointer; padding: 2px; background: var(--bg-surface); }
.icb-custom-color span { font-size: 0.85rem; color: var(--text-muted); font-weight: 500;}
.icb-gradient-custom { display: flex; align-items: center; gap: 10px; }
.icb-gradient-custom input[type="color"] { width: 40px; height: 32px; border: 1px solid var(--border-color); border-radius: 8px; cursor: pointer; padding: 2px; background: var(--bg-surface); }

/* 主工作区 */
.icb-workspace { flex: 1; display: flex; flex-direction: column; align-items: center; min-width: 0; position: relative; gap: 20px;}
.icb-canvas-wrap { width: 100%; display: flex; align-items: center; justify-content: center; min-height: 300px; position: relative; background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 16px; padding: 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.03);}
#canvas { max-width: 100%; max-height: 60vh; display: block; box-shadow: 0 10px 40px rgba(0,0,0,.15); border-radius: 4px; cursor: grab; touch-action: none; user-select: none; }
#canvas:active { cursor: grabbing; }

.icb-hint { flex: none; font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; }
.icb-hint span { display: inline-flex; align-items: center; gap: 6px; }
.icb-hint kbd { background: var(--bg-body); border: 1px solid var(--border-color); border-radius: 6px; padding: 2px 8px; font-family: inherit; font-size: 0.75rem; color: var(--text-main); font-weight: 600;}

/* 导出区 - 移到下方 */
.icb-export-panel { width: 100%; background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 16px; padding: 20px; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.03);}
.icb-export-title { font-size: 1.1rem; color: var(--text-main); margin-bottom: 16px; font-weight: 700;}
.icb-export-row { display: flex; gap: 16px; justify-content: center; max-width: 500px; margin: 0 auto;}
.icb-export-row .icb-btn { flex: 1; padding: 12px; font-size: 1rem;}
.icb-export-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 16px; line-height: 1.6; }

/* 【新增】SEO 底部通栏网格布局 */
.icb-seo-footer {
    margin-top: 32px; background: var(--bg-surface); padding: 32px;
    border-radius: 16px; border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.03); width: 100%; box-sizing: border-box;
}
.icb-seo-footer h3 { font-size: 1.25rem; color: var(--text-main); margin-bottom: 24px; font-weight: 700; text-align: center; }
.icb-seo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.icb-seo-item h4 { font-size: 1rem; color: var(--text-main); margin-bottom: 12px; font-weight: 600; display: flex; align-items: center; gap: 8px;}
.icb-seo-item p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; margin: 0; }

.icb-loading-overlay { position: fixed; inset: 0; background: rgba(var(--bg-surface-rgb), 0.75); z-index: 1000; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); }
.icb-loading-box { background: var(--bg-surface); padding: 24px 32px; border-radius: 16px; box-shadow: 0 10px 40px rgba(0,0,0,.2); font-size: 1rem; color: var(--text-main); display: flex; align-items: center; gap: 16px; border: 1px solid var(--border-color); font-weight: 600;}
.icb-spinner { width: 24px; height: 24px; border: 3px solid var(--border-color); border-top-color: var(--primary-color); border-radius: 50%; animation: icb-spin .7s linear infinite; }
@keyframes icb-spin { to { transform: rotate(360deg); } }

/* 强制隐藏 */
.icb-wrap [hidden], .icb-loading-overlay[hidden] { display: none !important; }

/* 响应式适配 */
@media (max-width: 900px) {
    .icb-layout { grid-template-columns: 1fr; }
    .icb-panel { max-height: 55vh; }
    .icb-export-row { flex-direction: column; gap: 12px; }
    .icb-seo-grid { grid-template-columns: 1fr; gap: 24px; }
    .icb-seo-footer { padding: 24px; }
}