/* 主题切换按钮样式 */
.theme-toggle-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.theme-toggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: var(--theme-toggle-bg, #ffffff);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.theme-icon {
    font-size: 20px;
    position: absolute;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.dark-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.5);
}

/* 暗黑模式下的图标状态 */
.theme-toggle[data-theme="dark"] .light-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.5);
}

.theme-toggle[data-theme="dark"] .dark-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* 主题变量 - 亮色模式 */
:root {
    --theme-toggle-bg: #ffffff;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --accent-primary: #3b82f6;
    --accent-secondary: #1e40af;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* 主题变量 - 暗色模式 */
[data-theme="dark"] {
    --theme-toggle-bg: #374151;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-primary: #374151;
    --border-secondary: #4b5563;
    --accent-primary: #60a5fa;
    --accent-secondary: #3b82f6;
    --success: #34d399;
    --warning: #fbbf24;
    --error: #f87171;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* 基础样式应用 */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 通用组件样式 */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.btn {
    transition: all 0.2s ease;
}

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

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

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

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

/* 表单元素 */
input, textarea, select {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* 链接 */
a {
    color: var(--accent-primary);
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
}

/* 分隔线 */
hr {
    border-color: var(--border-primary);
}

/* 表格 */
table {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
}

th, td {
    border-color: var(--border-primary);
}

th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .theme-toggle-container {
        top: 15px;
        right: 15px;
    }
    
    .theme-toggle {
        width: 45px;
        height: 45px;
    }
    
    .theme-icon {
        font-size: 18px;
    }
}

/* 平滑过渡动画 */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* 禁用某些元素的过渡效果以提高性能 */
.no-transition {
    transition: none !important;
}

/* 主题切换时的页面过渡效果 */
.theme-transition {
    transition: all 0.3s ease;
}