:root {
    /* 主色调 */
    --primary-color: #3b82f6;          /* 蓝色 - 用于Spine和Leaf交换机 */
    --secondary-color: #3b82f6;        /* 统一使用蓝色 - 与Spine相同 */
    --accent-color: #76b900;           /* Nvidia绿色 - 用于服务器节点 */
    --error-color: #ef4444;            /* 红色 */
    
    /* 背景和文本 */
    --bg-color: #f1f5f9;               /* 非常浅的灰色背景 */
    --card-bg: #ffffff;                /* 白色卡片背景 */
    --diagram-bg: #0f172a;             /* 深蓝色图表背景 */
    --text-primary: #1e293b;           /* 主要文本颜色 */
    --text-secondary: #64748b;         /* 次要文本颜色 */
    --text-light: #94a3b8;             /* 浅色文本 */
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
}

.container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 12px;
}

/* 头部样式 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px 8px 8px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 1.4rem;
    color: var(--primary-color);
    font-weight: 600;
}

.tools {
    display: flex;
    gap: 8px;
}

.tools button {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.8rem;
}

.tools button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tools button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 主内容区域 - 垂直布局 */
.main-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 12px;
}

/* 可视化区域 */
.visualization-area {
    flex: 1;
    min-height: 65vh;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

.visualization-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    height: 40px;
}

.visualization-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.visualization-header .status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background-color: rgba(59, 130, 246, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--secondary-color);
}

#diagram-container {
    flex: 1;
    overflow: auto;
    position: relative;
    background-color: var(--diagram-bg);
}

#diagram {
    width: 100%;
    height: 100%;
}

/* 信息面板 */
.visualization-info {
    position: absolute;
    top: 48px;
    left: 8px;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 10px;
    border-radius: 6px;
    border-left: 3px solid var(--secondary-color);
    max-width: 250px;
    font-size: 0.8rem;
    z-index: 10;
    box-shadow: var(--shadow);
    transform: translateX(-110%);
    transition: transform 0.3s ease;
}

.visualization-info.show {
    transform: translateX(0);
}

.info-toggle {
    position: absolute;
    top: 48px;
    left: 8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 11;
    transition: all 0.2s;
    font-size: 0.8rem;
    font-weight: bold;
    box-shadow: var(--shadow-sm);
}

.info-toggle:hover {
    background-color: #2563eb;
}

.info-toggle.active {
    left: 250px;
    background-color: var(--secondary-color);
}

.visualization-info h3 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--border-color);
}

.visualization-info p {
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.visualization-info .value {
    font-weight: 600;
    color: var(--text-primary);
}

/* 超紧凑型控制区域 - 六个面板布局 */
.controls-area {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 10px;
    border: 1px solid var(--border-color);
    max-height: 200px; /* 确保控制面板高度固定 */
}

.controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.controls-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* 网格布局 6列，确保控制面板横向排列 */
.controls-content {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
    overflow-y: auto;
    max-height: 125px; /* 控制内容区域最大高度 */
}

.control-group {
    background-color: #f8fafc;
    border-radius: 6px;
    padding: 8px;
    border: 1px solid var(--border-color);
}

.control-group h3 {
    font-size: 0.85rem;
    margin-bottom: 6px;
    color: var(--primary-color);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.control-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 6px;
}

label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

select, input[type="number"] {
    padding: 4px 6px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.8rem;
}

input[type="number"] {
    -moz-appearance: textfield;
    width: 100%;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

select:focus, input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.range-control {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-bottom: 4px;
}

.range-slider {
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: #e2e8f0;
    outline: none;
    transition: all 0.2s;
    margin: 5px 0;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
}

.range-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
}

.range-control .range-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-light);
}

.action-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border-color);
}

.action-buttons button {
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.primary-btn:hover {
    background-color: #2563eb;
}

.secondary-btn {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.secondary-btn:hover {
    color: var(--text-primary);
    border-color: var(--primary-color);
}

/* D3.js SVG 样式 */
.spine, .leaf {
    stroke: white;
    stroke-width: 1;
}

.spine {
    fill: var(--primary-color);
}

.leaf {
    fill: var(--primary-color); /* 修改：统一与Spine相同颜色 */
}

.server {
    fill: var(--accent-color); /* 修改：使用Nvidia绿色 */
    stroke: white;
    stroke-width: 1;
}

/* 连接线样式 */
path {
    transition: stroke 0.2s;
    stroke-width: 1.5px; /* 增加线条粗细 */
    stroke: rgba(255, 255, 255, 0.3); /* 增加不透明度 */
}

path:hover {
    stroke: var(--accent-color) !important; /* 使用Nvidia绿色 */
    stroke-width: 2px;
}

/* 工具提示 */
.tooltip {
    position: absolute;
    background-color: white;
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    pointer-events: none;
    z-index: 100;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transform: translate(-50%, -100%);
    margin-top: -8px;
    opacity: 0;
    transition: opacity 0.2s;
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid white;
}

/* 加载指示器 */
.loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

.loader {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--secondary-color);
    animation: spin 0.8s linear infinite;
}

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

/* 响应式设计 */
@media (min-width: 1200px) {
    .container {
        padding: 16px;
    }
    
    .controls-content {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (min-width: 768px) and (max-width: 1199px) {
    .controls-content {
        grid-template-columns: repeat(3, 1fr);
        max-height: 220px;
    }
    
    .controls-area {
        max-height: 260px;
    }
}

@media (max-width: 767px) {
    .controls-content {
        grid-template-columns: repeat(2, 1fr);
        max-height: 280px;
    }
    
    .controls-area {
        max-height: 320px;
    }
    
    .tools {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .controls-content {
        grid-template-columns: 1fr;
        max-height: 380px;
    }
    
    .controls-area {
        max-height: 420px;
    }
}