body {
    margin: 0;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #F5F1EA;
    color: #333333;
}

.container {
    margin: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.main-content {
    display: flex;
    gap: 20px;
    height: calc(100vh - 180px);
    position: relative;
}

.input-area {
    width: 300px;
    padding: 20px;
    background: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.canvas-container {
    flex-grow: 1;
    position: relative;
    border: 1px solid #ccc;
    border-radius: 4px;
    overflow: hidden;
    height: 100%;
    min-width: 0;
    background: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.stats-panel {
    width: 250px;
    padding: 15px;
    background: #FFFFFF;
    border: 1px solid #ccc;
    border-radius: 4px;
    flex-shrink: 0;
    max-height: 100%;
    overflow-y: auto;
    background: #FFFFFF;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.stats-panel h3 {
    margin: 0 0 10px 0;
    font-size: 16px;
    color: #333;
}

#graphStats {
    font-size: 14px;
    line-height: 1.6;
}

.toolbar {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 15px;
    background: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-right: 20px;
    border-right: 1px solid #E5E5E5;
}

.toolbar-group:last-child {
    border-right: none;
}

button {
    padding: 8px 16px;
    cursor: pointer;
    border: 1px solid #E5E5E5;
    border-radius: 6px;
    background: #FFFFFF;
    color: #333333;
    transition: all 0.2s;
}

button:hover {
    background: #FF7F5C;
    color: #FFFFFF;
    border-color: #FF7F5C;
}

button.selected {
    background: #FF7F5C;
    color: #FFFFFF;
    border-color: #FF7F5C;
}

.input-group {
    margin-bottom: 10px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
}

#nodeCount {
    width: 100px;
    padding: 8px;
}

#graphData {
    width: 100%;
    height: 150px;
    padding: 8px;
    resize: vertical;
}

#graphCanvas {
    display: block;
    background: white;
    width: 100%;
    height: 100%;
}

.zoom-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 5px;
}

.zoom-controls button {
    width: 40px;
    height: 40px;
    font-size: 20px;
    background: #FFFFFF;
    border: 1px solid #E5E5E5;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    line-height: 1;
}

.status-bar {
    padding: 10px;
    background: #f5f5f5;
    border-radius: 4px;
    font-size: 14px;
    color: #666;
}

/* 深色模式 */
body.dark-mode {
    background: #1E1E1E;
    color: #FFFFFF;
}

body.dark-mode .toolbar,
body.dark-mode .input-area,
body.dark-mode .canvas-container,
body.dark-mode .stats-panel,
body.dark-mode .style-panel {
    background: #2D2D2D;
    border-color: #3D3D3D;
}

body.dark-mode button {
    background: #2D2D2D;
    border-color: #3D3D3D;
    color: #FFFFFF;
}

body.dark-mode button:hover,
body.dark-mode button.selected {
    background: #4F8BFF;
    border-color: #4F8BFF;
}

body.dark-mode select,
body.dark-mode input,
body.dark-mode textarea {
    background: #2D2D2D;
    border-color: #3D3D3D;
    color: #FFFFFF;
}

body.dark-mode #graphCanvas {
    background: #1e1e1e;
}

/* 下拉菜单样式 */
select {
    padding: 8px;
    border: 1px solid #E5E5E5;
    border-radius: 6px;
    background: #FFFFFF;
    color: #333333;
}

/* 深色模式下拉菜单选项样式 */
body.dark-mode select option {
    background: #2D2D2D;
    color: #FFFFFF;
}

/* 样式设置面板 */
.style-panel {
    position: fixed;
    width: 250px;
    right: 20px;
    top: 200px;
    background: #FFFFFF;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 1000;
    display: none;
    background: #FFFFFF;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.style-panel h3 {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #333;
}

.style-group {
    margin-bottom: 10px;
}

.style-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: #666;
}

.style-group input[type="range"] {
    width: 100%;
}

.style-group input[type="color"] {
    width: 100%;
    height: 30px;
    padding: 2px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* 深色模式适配 */
body.dark-mode .style-panel {
    background: #2d2d2d;
    border-color: #444;
}

body.dark-mode .style-panel h3,
body.dark-mode .style-group label {
    color: #fff;
}

.style-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    cursor: move;
    user-select: none;
    padding: 5px;
}

.style-panel-header:hover {
    background: #f5f5f5;
}

.style-panel-header h3 {
    margin: 0;
}

.close-button {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 0 5px;
}

.close-button:hover {
    color: #ff4444;
}

input[type="text"],
input[type="number"],
textarea {
    padding: 8px;
    border: 1px solid #E5E5E5;
    border-radius: 6px;
    background: #FFFFFF;
}

.github-link {
    display: inline-flex;
    align-items: center;
    padding: 8px;
    color: #333333;
    border-radius: 6px;
    transition: all 0.2s;
    margin-left: 10px;
}

.github-link:hover {
    background: #FF7F5C;
    color: #FFFFFF;
}

body.dark-mode .github-link {
    color: #FFFFFF;
}

body.dark-mode .github-link:hover {
    background: #FF7F5C;
}

/* 基础响应式设计 */
@media screen and (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        margin: 10px;
    }

    .toolbar {
        flex-direction: column;
        gap: 10px;
    }

    .toolbar-group {
        flex-wrap: wrap;
        padding-right: 0;
        border-right: none;
        border-bottom: 1px solid #E5E5E5;
        padding-bottom: 10px;
    }

    .toolbar-group:last-child {
        border-bottom: none;
    }

    .main-content {
        flex-direction: column;
        height: auto;
    }

    .input-area {
        width: auto;
    }

    .canvas-container {
        height: 60vh;
    }

    .stats-panel {
        width: auto;
    }

    button {
        padding: 10px;
        font-size: 14px;
    }

    select {
        width: 100%;
    }

    .style-panel {
        width: 90%;
        right: 5%;
        left: 5%;
    }

    .zoom-controls {
        bottom: 10px;
        right: 10px;
    }

    .zoom-controls button {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
}

/* 添加触摸事件支持 */
@media (hover: none) {
    button:hover {
        background: #FFFFFF;
        color: #333333;
    }

    button:active {
        background: #FF7F5C;
        color: #FFFFFF;
    }
}

/* 移动设备优化 */
@media (max-width: 768px) {
    .toolbar button {
        min-height: 44px; /* 更大的触摸目标 */
        font-size: 16px;
    }

    .zoom-controls button {
        width: 44px;
        height: 44px;
        font-size: 24px;
    }

    .input-area {
        max-height: 30vh;
        overflow-y: auto;
    }

    #graphData {
        height: 100px;
    }

    .style-panel {
        max-height: 80vh;
        overflow-y: auto;
    }

    /* 防止iOS上的橡皮筋效果 */
    .canvas-container {
        overflow: hidden;
        -webkit-overflow-scrolling: touch;
    }
}

/* 禁用页面缩放 */
@viewport {
    width: device-width;
    zoom: 1.0;
    user-zoom: fixed;
}

/* 复选框和标签样式 */
input[type="checkbox"] {
    margin-right: 5px;
}

input[type="checkbox"] + label {
    cursor: pointer;
    user-select: none;
}

/* 深色模式适配 */
body.dark-mode input[type="checkbox"] + label {
    color: #FFFFFF;
}

/* 开关标签样式 */
.switch-label {
    font-size: 14px;
    margin-right: 5px;
}

body.dark-mode .switch-label {
    color: #FFFFFF;
}

/* 开关样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    margin: 0 10px;
    vertical-align: middle;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #E5E5E5;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #FF7F5C;
}

input:checked + .slider:before {
    transform: translateX(30px);
}

.slider-text {
    position: absolute;
    color: #333333;
    font-size: 12px;
    line-height: 30px;
    font-weight: bold;
}

.slider-text.on {
    right: 8px;
    color: #FFFFFF;
    opacity: 0;
    transition: .4s;
}

.slider-text.off {
    left: 8px;
    color: #666666;
    opacity: 1;
    transition: .4s;
}

input:checked ~ .slider-text.on {
    opacity: 1;
    z-index: 1;
}

input:checked ~ .slider-text.off {
    opacity: 0;
}

/* 深色模式适配 */
body.dark-mode .slider {
    background-color: #593224;
}

body.dark-mode .slider:before {
    background-color: #FFFFFF;
}

body.dark-mode input:checked + .slider {
    background-color: #FF7F5C;
}

body.dark-mode .slider-text {
    color: #FFFFFF;
}

body.dark-mode .slider-text.off {
    color: #CCCCCC;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    padding: 0;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    line-height: 1;
}

body.dark-mode .theme-toggle {
    background: #2D2D2D;
    border-color: #3D3D3D;
    color: #FFFFFF;
}