/* public/assets/css/image/paint-tool.css */

.paint-workspace {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}

.paint-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: #f8fafc;
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .paint-toolbar { background: #1e293b; }

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toolbar-group.action-group {
    margin-left: auto;
}

.toolbar-divider {
    width: 2px;
    height: 32px;
    background: var(--border-color);
    margin: 0 4px;
    border-radius: 2px;
}

/* 【升级】：带有背景和文字的画笔控制按钮 */
.tool-btn {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-body);
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px; /* 图标和文字的间距 */
}

.tool-btn:hover { 
    background: #e2e8f0; 
    border-color: #cbd5e1;
}

.tool-btn.active { 
    background: var(--primary-color); 
    color: #fff; 
    border-color: var(--primary-color);
    box-shadow: 0 4px 10px rgba(0,102,204,0.3); 
}

[data-theme="dark"] .tool-btn { background: #0f172a; border-color: #334155; color: #f8fafc; }
[data-theme="dark"] .tool-btn:hover { background: #334155; border-color: #475569; }
[data-theme="dark"] .tool-btn.active { background: var(--primary-color); color: #fff; border-color: var(--primary-color); }

.color-picker-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-picker-wrap input[type="color"] {
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

.color-picker-wrap input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-picker-wrap input[type="color"]::-webkit-color-swatch { border: 2px solid var(--border-color); border-radius: 8px; }

.bg-presets {
    display: flex;
    gap: 8px;
}
.bg-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.bg-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
.bg-btn.active { border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(0,102,204,0.2); }

.size-slider-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    min-width: 120px;
}
.size-slider-wrap input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.action-btn {
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background: var(--bg-body);
    color: var(--text-main);
    cursor: pointer;
    transition: 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.action-btn:hover { background: #e2e8f0; }
[data-theme="dark"] .action-btn:hover { background: #334155; }

.action-btn.danger { color: #ef4444; border-color: rgba(239, 68, 68, 0.3); background: rgba(239, 68, 68, 0.05); }
.action-btn.danger:hover { background: rgba(239, 68, 68, 0.1); }

.action-btn.primary { background: var(--primary-color); color: #fff; border: none; box-shadow: 0 4px 10px rgba(0,102,204,0.2); }
.action-btn.primary:hover { filter: brightness(1.1); transform: translateY(-1px); }

/* 画布基础底层：棋盘格 */
.canvas-container {
    width: 100%;
    height: 650px;
    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: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    position: relative;
    cursor: crosshair;
    overflow: hidden;
}

[data-theme="dark"] .canvas-container {
    background-image: linear-gradient(45deg, #334155 25%, transparent 25%), linear-gradient(-45deg, #334155 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #334155 75%), linear-gradient(-45deg, transparent 75%, #334155 75%);
}

#paintCanvas {
    position: absolute;
    top: 0; left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    display: block;
    background-color: transparent; 
    transition: background-color 0.3s;
}

@media (max-width: 768px) {
    .pc-text, .pc-only { display: none !important; }
    .action-btn { padding: 10px; }
    .toolbar-group { width: 100%; justify-content: space-between; flex-wrap: wrap; }
    .toolbar-divider { display: none; }
    .size-slider-wrap { flex: 1; }
    .canvas-container { height: 500px; }
    
    /* 移动端下保持按钮文字依然可见，或者让它们缩小一点 */
    .tool-btn { padding: 8px 10px; font-size: 0.85rem; }
}