/* ========== 电路沙盒样式 ========== */

:root {
    --bg-main: #1a1a2e;
    --bg-panel: #16213e;
    --bg-canvas: #0f3460;
    --bg-paper: #f3eee8;
    --ink: #533a32;
    --muted: #876b60;
    --line: #e3d8cf;
    --accent: #4a90e2;
    --accent-dark: #2d6bc4;
    --success: #48bb78;
    --warning: #ed8936;
    --danger: #f56565;
    --text-primary: #e2e8f0;
    --text-secondary: #a0aec0;
    --shadow: rgba(0, 0, 0, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

.circuit-lab-root {
    display: flex;
    width: 100vw;
    height: 100vh;
}

/* ========== 左侧元件库 ========== */
.palette-drawer {
    width: 260px;
    flex-shrink: 0;
    background: var(--bg-panel);
    border-right: 1px solid rgba(255,255,255,0.08);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.drawer-header {
    padding: 16px 16px 10px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.drawer-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
}

.drawer-sub {
    font-size: .78rem;
    color: var(--text-secondary);
    margin-top: 2px;
    display: block;
}

.stage-tabs {
    display: flex;
    padding: 10px 12px;
    gap: 6px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.tab-btn {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid rgba(255,255,255,0.1);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}

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

/* ========== 常用电路图区域 ========== */
.circuits-section {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}
.circuits-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    gap: 6px;
}
.circuits-open-btn {
    flex: 1;
    padding: 5px 10px;
    background: rgba(74, 144, 226, 0.15);
    border: 1px solid rgba(74, 144, 226, 0.3);
    color: var(--accent);
    border-radius: 5px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    white-space: nowrap;
}
.circuits-open-btn:hover {
    background: rgba(74, 144, 226, 0.25);
    border-color: var(--accent);
}
.circuits-save-btn {
    padding: 5px 10px;
    background: rgba(72, 187, 120, 0.2);
    border: 1px solid rgba(72, 187, 120, 0.4);
    color: var(--success);
    border-radius: 5px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    white-space: nowrap;
}
.circuits-save-btn:hover {
    background: rgba(72, 187, 120, 0.35);
    border-color: var(--success);
}

/* ========== 常用电路图弹窗 ========== */
.circuit-modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}
.circuit-modal-overlay.active {
    display: flex;
}
.circuit-modal {
    background: var(--bg-panel);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    width: 90%;
    max-width: 720px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.circuit-modal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.circuit-modal-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}
.circuit-modal-filters {
    display: flex;
    gap: 8px;
}
.circuit-modal-cat {
    padding: 4px 8px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-primary);
    border-radius: 5px;
    font-size: .78rem;
    cursor: pointer;
    outline: none;
}
.circuit-modal-cat option {
    background: var(--bg-panel);
}
.circuit-modal-close {
    width: 28px;
    height: 28px;
    background: rgba(245, 101, 101, 0.15);
    border: 1px solid rgba(245, 101, 101, 0.3);
    color: var(--danger);
    border-radius: 6px;
    font-size: .9rem;
    cursor: pointer;
    transition: all .2s;
}
.circuit-modal-close:hover {
    background: rgba(245, 101, 101, 0.3);
}
.circuit-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    align-content: start;
}
.circuit-modal-body:empty::after {
    content: '暂无电路图';
    color: var(--text-secondary);
    font-size: .85rem;
    opacity: .5;
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 0;
}
.circuit-modal-body::-webkit-scrollbar { width: 6px; }
.circuit-modal-body::-webkit-scrollbar-track { background: transparent; }
.circuit-modal-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

/* 管理工具栏 */
.circuit-modal-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    background: rgba(74,144,226,0.06);
    flex-wrap: wrap;
}
.circuit-toolbar-info {
    font-size: .8rem;
    color: var(--text-secondary);
    margin-right: auto;
}
.circuit-toolbar-info b {
    color: var(--accent);
    font-weight: 700;
}
.circuit-toolbar-btn {
    padding: 4px 10px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-primary);
    border-radius: 5px;
    font-size: .75rem;
    cursor: pointer;
    transition: all .2s;
}
.circuit-toolbar-btn:hover {
    background: rgba(74,144,226,0.2);
    border-color: var(--accent);
}
.circuit-toolbar-btn.danger:hover {
    background: rgba(245,101,101,0.2);
    border-color: var(--danger);
    color: var(--danger);
}
.circuit-batch-cat-select {
    padding: 4px 8px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-primary);
    border-radius: 5px;
    font-size: .75rem;
    cursor: pointer;
    outline: none;
    max-width: 140px;
}
.circuit-cat-manage-btn {
    padding: 4px 10px;
    background: rgba(72, 187, 120, 0.2);
    border: 1px solid rgba(72, 187, 120, 0.4);
    color: var(--success);
    border-radius: 5px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}
.circuit-cat-manage-btn:hover {
    background: rgba(72, 187, 120, 0.35);
}

/* 选中态卡片 */
.circuit-card.selected {
    background: rgba(74, 144, 226, 0.25);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(74,144,226,0.4);
}
.circuit-card-checkbox {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 2px solid rgba(255,255,255,0.3);
    background: rgba(0,0,0,0.4);
    cursor: pointer;
    z-index: 3;
    display: none;
}
.circuit-card.manage-mode .circuit-card-checkbox {
    display: block;
}
.circuit-card.manage-mode {
    cursor: default;
}
.circuit-card.selected .circuit-card-checkbox {
    background: var(--accent);
    border-color: var(--accent);
}
.circuit-card.selected .circuit-card-checkbox::after {
    content: '✓';
    color: #fff;
    font-size: 11px;
    text-align: center;
    line-height: 14px;
    font-weight: bold;
}

/* 编辑面板(浮于卡片上方) */
.circuit-edit-panel,
.circuit-cat-manage-panel {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-panel);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 10px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
    z-index: 10;
}
.circuit-edit-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: .9rem;
    font-weight: 700;
    color: var(--text-primary);
}
.circuit-edit-panel-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
}
.circuit-edit-panel-close:hover {
    color: var(--danger);
}
.circuit-edit-panel-body {
    padding: 14px 16px;
}
.circuit-edit-field {
    margin-bottom: 12px;
}
.circuit-edit-field label {
    display: block;
    font-size: .75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.circuit-edit-field input,
.circuit-edit-field select {
    width: 100%;
    padding: 6px 8px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-primary);
    border-radius: 5px;
    font-size: .82rem;
    outline: none;
}
.circuit-edit-field input:focus,
.circuit-edit-field select:focus {
    border-color: var(--accent);
}
.circuit-edit-inline-add-cat {
    padding: 6px 10px;
    background: rgba(72, 187, 120, 0.2);
    border: 1px solid rgba(72, 187, 120, 0.4);
    color: var(--success);
    border-radius: 5px;
    font-size: .72rem;
    cursor: pointer;
    white-space: nowrap;
}
.circuit-edit-inline-add-cat:hover {
    background: rgba(72, 187, 120, 0.35);
}
.circuit-edit-info {
    font-size: .7rem;
    color: var(--text-secondary);
    opacity: .7;
    margin-top: 4px;
}
.circuit-edit-panel-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 10px 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.circuit-edit-cancel {
    padding: 6px 14px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-primary);
    border-radius: 5px;
    font-size: .82rem;
    cursor: pointer;
}
.circuit-edit-save {
    padding: 6px 14px;
    background: var(--accent);
    border: 1px solid var(--accent);
    color: #fff;
    border-radius: 5px;
    font-size: .82rem;
    cursor: pointer;
    font-weight: 600;
}
.circuit-edit-save:hover {
    background: var(--accent-dark);
}

/* 分组管理列表 */
.circuit-cat-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
}
.circuit-cat-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 5px;
    font-size: .8rem;
}
.circuit-cat-list-item-name {
    color: var(--text-primary);
    flex: 1;
}
.circuit-cat-list-item-count {
    color: var(--text-secondary);
    font-size: .7rem;
    margin: 0 8px;
}
.circuit-cat-list-item-del {
    background: rgba(245,101,101,0.15);
    border: 1px solid rgba(245,101,101,0.3);
    color: var(--danger);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: .7rem;
    cursor: pointer;
}
.circuit-cat-list-item-del:hover {
    background: rgba(245,101,101,0.3);
}

/* 弹窗中的电路图卡片 */
.circuit-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 10px 8px;
    cursor: pointer;
    transition: all .2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: relative;
}
.circuit-card:hover {
    background: rgba(74, 144, 226, 0.15);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74,144,226,0.15);
}
.circuit-card-icon {
    font-size: 1.5rem;
}
.circuit-card-name {
    font-size: .75rem;
    color: var(--text-primary);
    text-align: center;
    line-height: 1.3;
    word-break: break-all;
}
.circuit-card-info {
    font-size: .6rem;
    color: var(--text-secondary);
    opacity: .7;
    text-align: center;
}
.circuit-card-cat {
    display: inline-block;
    padding: 1px 6px;
    background: rgba(74,144,226,0.2);
    color: var(--accent);
    border-radius: 3px;
    font-size: .55rem;
    font-weight: 600;
}
.circuit-card-delete {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity .2s;
    border: 1px solid #fff;
    z-index: 2;
}
.circuit-card:hover .circuit-card-delete {
    opacity: 1;
}
.circuit-card-edit {
    position: absolute;
    top: -6px;
    left: -6px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity .2s;
    border: 1px solid #fff;
    z-index: 2;
}
.circuit-card:hover .circuit-card-edit {
    opacity: 1;
}

.palette {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-content: start;
}

.palette::-webkit-scrollbar { width: 6px; }
.palette::-webkit-scrollbar-track { background: transparent; }
.palette::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

.palette-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    padding: 10px 6px;
    cursor: grab;
    transition: all .2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.palette-card:hover {
    background: rgba(74, 144, 226, 0.15);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

.palette-card:active { cursor: grabbing; }

.component-preview {
    width: 60px;
    height: 60px;
    display: block;
}

.palette-label {
    font-size: .72rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-align: center;
}

.drawer-tips {
    padding: 12px 16px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: .72rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.drawer-tips p { margin: 0; }

/* ========== 主工作区 ========== */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* 工具栏 */
.toolbar {
    height: 48px;
    background: var(--bg-panel);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    flex-shrink: 0;
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.toolbar-center { flex: 1; text-align: center; }

.canvas-title {
    font-size: .85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.tool-btn {
    padding: 6px 12px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-primary);
    border-radius: 6px;
    font-size: .82rem;
    cursor: pointer;
    transition: all .2s;
    white-space: nowrap;
}

.tool-btn:hover {
    background: rgba(74, 144, 226, 0.2);
    border-color: var(--accent);
}

.tool-btn.danger:hover {
    background: rgba(245, 101, 101, 0.2);
    border-color: var(--danger);
}

.tool-btn.active {
    background: rgba(74, 144, 226, 0.3);
    border-color: var(--accent);
    color: var(--accent);
}

/* ========== 电路图模式(CSS驱动隐藏装饰) ========== */
.circuit-lab-root.schematic-mode .component {
    cursor: grab;
    filter: none !important;
}
.circuit-lab-root.schematic-mode .component:active {
    cursor: grabbing;
}
.circuit-lab-root.schematic-mode .component.selected {
    filter: drop-shadow(0 0 4px var(--accent)) !important;
}
.circuit-lab-root.schematic-mode .component:hover {
    filter: none !important;
}
/* 电路图模式:接线柱小圆点仅hover/选中显示 */
.circuit-lab-root.schematic-mode .terminal-point {
    pointer-events: auto;
}
/* 电路图模式:导线变直变白 */
.circuit-lab-root.schematic-mode .wire-outer {
    display: none !important;
}
.circuit-lab-root.schematic-mode .wire-path {
    stroke: #ffffff !important;
    stroke-width: 3 !important;
    stroke-linecap: square !important;
    stroke-linejoin: miter !important;
}

.zoom-label {
    font-size: .8rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* 仿真状态条 */
.sim-status-bar {
    height: 32px;
    background: rgba(72, 187, 120, 0.1);
    border-bottom: 1px solid rgba(72, 187, 120, 0.2);
    color: var(--success);
    font-size: .78rem;
    display: flex;
    align-items: center;
    padding: 0 16px;
    flex-shrink: 0;
}

.sim-status-bar:empty { display: none; }

/* 画布 */
.canvas-wrapper {
    flex: 1;
    background: var(--bg-canvas);
    position: relative;
    overflow: hidden;
}

#circuit-svg {
    width: 100%;
    height: 100%;
    display: block;
    cursor: default;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* SVG文字不接收点击事件, 避免干扰接线柱点击 */
#circuit-svg text {
    pointer-events: none;
    user-select: none;
    -webkit-user-select: none;
}

/* 接线柱点击区域 */
#circuit-svg .terminal-point {
    pointer-events: auto;
    cursor: crosshair;
}

/* 组件样式 */
.component {
    cursor: grab;
    transition: filter .2s;
}

.component:hover {
    filter: brightness(1.15);
}

.component:active { cursor: grabbing; }

.component.selected {
    filter: drop-shadow(0 0 6px var(--accent));
}

.component.bulb-body.glowing {
    filter: drop-shadow(0 0 8px rgba(255, 235, 59, 0.6));
}

.terminal-point {
    cursor: crosshair;
    transition: all .15s;
}

.terminal-point:hover {
    r: 6;
    stroke: var(--accent);
    stroke-width: 2.5;
}

/* 画布底部信息 */
.canvas-info {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-size: .68rem;
    color: rgba(255,255,255,0.35);
    pointer-events: none;
}

/* 导线点击区域 */
.wire-hit {
    cursor: pointer;
}

.wire-hit:hover + path,
.wire-hit:hover ~ path {
    stroke-width: 5;
}

/* 复位按钮 */
.tool-btn.reset-btn {
    background: rgba(245, 101, 101, 0.25);
    border-color: var(--danger);
    color: #fff;
    animation: pulse-reset 1.5s infinite;
}

@keyframes pulse-reset {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 101, 101, 0.7); }
    50% { box-shadow: 0 0 0 8px rgba(245, 101, 101, 0); }
}

/* 爆炸元件 */
.component.exploded {
    pointer-events: none;
}

/* UI 删除按钮和颜色切换按钮 hover 效果 */
.ui-delete-btn:hover,
.ui-color-btn:hover {
    filter: brightness(1.2);
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
    .palette-drawer {
        width: 100%;
        position: absolute;
        bottom: 0;
        height: 200px;
        z-index: 10;
        border-right: none;
        border-top: 1px solid rgba(255,255,255,0.08);
    }
    .circuit-lab-root { flex-direction: column; }
    .palette { grid-template-columns: 1fr 1fr 1fr 1fr; }
    .drawer-tips { display: none; }
    .tool-btn { padding: 4px 8px; font-size: .75rem; }
    .toolbar { height: 42px; padding: 0 8px; gap: 6px; }
    .canvas-title { display: none; }
}

@media (max-width: 480px) {
    .palette { grid-template-columns: 1fr 1fr 1fr; }
}