/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --bg-color: #ecf0f1;
    --panel-bg: #ffffff;
    --border-color: #bdc3c7;
    --text-color: #2c3e50;
    --header-height: 60px;
    --control-panel-height: 280px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
}

/* 顶部工具栏 */
.toolbar {
    height: var(--header-height);
    background: linear-gradient(135deg, var(--primary-color), #34495e);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.toolbar-left h1 {
    font-size: 20px;
    font-weight: 600;
}

.file-info {
    font-size: 14px;
    opacity: 0.9;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.toolbar-right {
    display: flex;
    gap: 10px;
}

/* 按钮样式 */
.btn {
    padding: 8px 16px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn:active {
    transform: translateY(0);
}

.btn-sm {
    padding: 4px 12px;
    font-size: 12px;
}

/* 主容器 */
.main-container {
    display: flex;
    height: calc(100vh - var(--header-height) - var(--control-panel-height));
    gap: 0;
}

/* Canvas面板 */
.canvas-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--panel-bg);
    border-right: 2px solid var(--border-color);
}

.canvas-panel:last-child {
    border-right: none;
}

.panel-header {
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
}

.panel-info {
    font-size: 12px;
    color: #7f8c8d;
}

.canvas-wrapper {
    flex: 1;
    overflow: auto;
    position: relative;
    background:
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

canvas {
    display: block;
    cursor: move;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* 控制面板 */
.control-panel {
    height: var(--control-panel-height);
    background: var(--panel-bg);
    border-top: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: height 0.3s ease;
}

.control-panel.collapsed {
    height: 45px;
}

.control-panel.collapsed .control-content {
    display: none;
}

.control-header {
    padding: 12px 20px;
    background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.control-header h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
}

.toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-color);
    transition: transform 0.3s;
}

.control-panel.collapsed .toggle-btn {
    transform: rotate(-90deg);
}

.control-content {
    flex: 1;
    padding: 15px 20px;
    overflow-y: auto;
    display: flex;
    gap: 15px;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group.stats {
    background: #f8f9fa;
    padding: 10px;
    border-radius: 4px;
}

.control-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-row input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.control-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    transition: all 0.2s;
}

.control-row input[type="range"]::-webkit-slider-thumb:hover {
    background: #2980b9;
    transform: scale(1.2);
}

.control-row input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    border: none;
}

.control-row input[type="color"] {
    width: 40px;
    height: 30px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.control-row .value {
    min-width: 50px;
    text-align: right;
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 14px;
}

.control-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 13px;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* 统计信息 */
.stats-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 4px 0;
    border-bottom: 1px solid #e9ecef;
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-item span:last-child {
    font-weight: 600;
    color: var(--secondary-color);
}

/* 字符提示框 */
.char-tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 13px;
    pointer-events: none;
    z-index: 1000;
    display: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    max-width: 300px;
}

.char-tooltip.visible {
    display: block;
}

.tooltip-content {
    line-height: 1.6;
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay p {
    margin-top: 20px;
    font-size: 16px;
    color: var(--text-color);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* 响应式 */
@media (max-width: 1200px) {
    .control-content {
        flex-wrap: wrap;
    }

    .control-group {
        min-width: 180px;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }

    .canvas-panel {
        border-right: none;
        border-bottom: 2px solid var(--border-color);
    }

    .toolbar-left h1 {
        font-size: 16px;
    }

    .file-info {
        display: none;
    }
}