/* 全局样式和变量 */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --success-hover: #059669;
    --info-color: #06b6d4;
    --info-hover: #0891b2;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-code: #1e293b;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-code: #e2e8f0;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 暗色主题 */
body.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-code: #0f172a;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;
    --text-code: #e2e8f0;
    
    --border-color: #334155;
    --border-light: #1e293b;
}

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif, -apple-system, BlinkMacSystemFont;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

/* 容器 */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    background: var(--bg-primary);
    padding: 30px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.header-content {
    flex: 1;
}

.logo {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
    display: inline-block;
    vertical-align: middle;
}

.tagline {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* 主题切换按钮 */
.theme-toggle {
    display: flex;
    align-items: center;
}

.theme-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
}

.theme-btn:hover {
    transform: scale(1.1);
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.theme-btn svg {
    width: 24px;
    height: 24px;
    position: absolute;
    transition: var(--transition);
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg);
}

body.dark-theme .sun-icon {
    opacity: 0;
    transform: rotate(180deg);
}

body.dark-theme .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

/* 工具栏 */
.toolbar {
    background: var(--bg-primary);
    padding: 20px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    transition: var(--transition);
}

.toolbar-section {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toolbar-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.select-dropdown {
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.select-dropdown:hover {
    border-color: var(--primary-color);
}

.select-dropdown:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.toolbar-actions {
    margin-left: auto;
    gap: 12px;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    outline: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-info {
    background: var(--info-color);
    color: white;
}

.btn-info:hover {
    background: var(--info-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

/* 编辑器容器 */
.editor-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    flex: 1;
    margin-bottom: 24px;
    min-height: 500px;
}

.editor-panel {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
}

.panel-header {
    padding: 20px 24px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
}

.panel-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.panel-info {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.separator {
    color: var(--border-color);
}

.editor-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.code-editor {
    width: 100%;
    height: 100%;
    padding: 24px;
    border: none;
    background: var(--bg-code);
    color: var(--text-code);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
    outline: none;
    transition: var(--transition);
}

.code-editor::placeholder {
    color: var(--text-tertiary);
}

.code-editor:focus {
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

/* 分隔线 */
.editor-divider {
    display: flex;
    align-items: center;
    justify-content: center;
}

.divider-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.divider-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

/* 快捷键说明 */
.shortcuts {
    background: var(--bg-primary);
    padding: 20px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
    transition: var(--transition);
}

.shortcuts-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.shortcuts-list {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

kbd {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: 'Consolas', monospace;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 底部 */
.footer {
    background: var(--bg-primary);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 13px;
    transition: var(--transition);
}

/* 提示消息 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    background: var(--success-color);
    color: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    font-weight: 600;
    font-size: 14px;
    opacity: 0;
    transform: translateY(-20px);
    transition: var(--transition);
    pointer-events: none;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toast.error {
    background: var(--danger-color);
}

.toast.warning {
    background: var(--warning-color);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .editor-container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto 1fr;
    }
    
    .editor-divider {
        height: 40px;
    }
    
    .divider-icon {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 12px;
    }
    
    .header {
        flex-direction: column;
        padding: 20px;
        gap: 16px;
    }
    
    .logo {
        font-size: 24px;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
    }
    
    .toolbar-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .toolbar-actions {
        margin-left: 0;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .shortcuts-list {
        flex-direction: column;
        gap: 12px;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 选中文本样式 */
::selection {
    background: var(--primary-color);
    color: white;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.editor-panel,
.toolbar,
.header,
.shortcuts,
.footer {
    animation: fadeIn 0.5s ease-out;
}