/**
 * Mode Switcher Styles
 * 
 * 模式切换器的完整样式定义，包括：
 * - 切换器容器和布局
 * - 模式按钮和状态指示
 * - 切换动画效果
 * - 响应式设计
 * - 深色模式支持
 * - 无障碍访问支持
 */

/* ==========================================================================
   CSS 变量定义
   ========================================================================== */

:root {
    --switcher-bg: rgba(255, 255, 255, 0.95);
    --switcher-border: rgba(0, 0, 0, 0.1);
    --switcher-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --switcher-radius: 12px;
    --switcher-padding: 16px;
    
    --button-bg: #ffffff;
    --button-border: rgba(0, 0, 0, 0.1);
    --button-hover: #f8f9fa;
    --button-active: #e3f2fd;
    --button-radius: 8px;
    --button-padding: 12px;
    
    --status-ready: #4caf50;
    --status-switching: #ff9800;
    --status-error: #f44336;
    --status-warning: #ffc107;
    
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    
    --animation-duration: 0.3s;
    --animation-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色模式变量 */
[data-theme="dark"] {
    --switcher-bg: rgba(30, 30, 30, 0.95);
    --switcher-border: rgba(255, 255, 255, 0.1);
    --switcher-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --button-bg: #2d2d2d;
    --button-border: rgba(255, 255, 255, 0.1);
    --button-hover: #3d3d3d;
    --button-active: #1e3a8a;
    
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
}

/* 自动主题（跟随系统） */
@media (prefers-color-scheme: dark) {
    [data-theme="auto"] {
        --switcher-bg: rgba(30, 30, 30, 0.95);
        --switcher-border: rgba(255, 255, 255, 0.1);
        --switcher-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        
        --button-bg: #2d2d2d;
        --button-border: rgba(255, 255, 255, 0.1);
        --button-hover: #3d3d3d;
        --button-active: #1e3a8a;
        
        --text-primary: #ffffff;
        --text-secondary: #b0b0b0;
        --text-muted: #808080;
    }
}

/* ==========================================================================
   模式切换器主容器
   ========================================================================== */

.mode-switcher {
    position: fixed;
    z-index: 1000;
    background: var(--switcher-bg);
    border: 1px solid var(--switcher-border);
    border-radius: var(--switcher-radius);
    box-shadow: var(--switcher-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    min-width: 280px;
    max-width: 400px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    transition: all var(--animation-duration) var(--animation-easing);
    user-select: none;
}

/* 位置变体 */
.mode-switcher.top-right {
    top: 20px;
    right: 20px;
}

.mode-switcher.top-left {
    top: 20px;
    left: 20px;
}

.mode-switcher.bottom-right {
    bottom: 20px;
    right: 20px;
}

.mode-switcher.bottom-left {
    bottom: 20px;
    left: 20px;
}

.mode-switcher.center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* 状态变体 */
.mode-switcher.hidden {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
    pointer-events: none;
}

.mode-switcher.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.mode-switcher.minimized .mode-switcher-body {
    display: none;
}

.mode-switcher.minimized .mode-switcher-footer {
    display: none;
}

.mode-switcher.mode-switching {
    transform: scale(1.02);
}

/* ==========================================================================
   切换器头部
   ========================================================================== */

.mode-switcher-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--switcher-padding);
    border-bottom: 1px solid var(--switcher-border);
}

.switcher-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
}

.title-icon {
    font-size: 16px;
}

.switcher-controls {
    display: flex;
    gap: 4px;
}

.control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.control-btn:hover {
    background: var(--button-hover);
    color: var(--text-primary);
}

.control-btn .material-icons {
    font-size: 16px;
}

/* ==========================================================================
   切换器主体
   ========================================================================== */

.mode-switcher-body {
    padding: var(--switcher-padding);
}

.mode-buttons-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

/* ==========================================================================
   模式按钮
   ========================================================================== */

.mode-button {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--button-padding);
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: var(--button-radius);
    cursor: pointer;
    transition: all var(--animation-duration) var(--animation-easing);
    overflow: hidden;
}

.mode-button:hover {
    background: var(--button-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mode-button:active {
    transform: translateY(0);
}

.mode-button.active {
    background: var(--button-active);
    border-color: var(--mode-color, #2196f3);
    box-shadow: 0 0 0 2px rgba(var(--mode-color-rgb, 33, 150, 243), 0.2);
}

.mode-button.switching {
    animation: modeSwitching 0.6s ease-in-out;
}

@keyframes modeSwitching {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.mode-button-content {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 12px;
}

.mode-icon {
    font-size: 20px;
    min-width: 24px;
    text-align: center;
}

.mode-info {
    flex: 1;
    text-align: left;
}

.mode-name {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.mode-shortcut {
    font-size: 12px;
    color: var(--text-muted);
}

.mode-status {
    display: flex;
    align-items: center;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: all 0.2s ease;
}

.mode-button.active .status-dot {
    background: var(--status-ready);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.3);
}

.mode-button-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, var(--mode-color, #2196f3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mode-button.active .mode-button-overlay {
    opacity: 0.1;
}

/* ==========================================================================
   状态指示器
   ========================================================================== */

.mode-status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: var(--button-radius);
    margin-bottom: 12px;
    font-size: 13px;
}

.status-icon {
    font-size: 14px;
    min-width: 16px;
}

.status-text {
    flex: 1;
    color: var(--text-secondary);
}

.status-progress {
    width: 60px;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--status-switching);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-bar.animated {
    animation: progressPulse 1s ease-in-out infinite;
}

@keyframes progressPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* 状态变体 */
.mode-status-indicator.ready {
    border-color: var(--status-ready);
}

.mode-status-indicator.ready .status-icon {
    color: var(--status-ready);
}

.mode-status-indicator.switching {
    border-color: var(--status-switching);
}

.mode-status-indicator.switching .status-icon {
    color: var(--status-switching);
    animation: spin 1s linear infinite;
}

.mode-status-indicator.error {
    border-color: var(--status-error);
    background: rgba(244, 67, 54, 0.05);
}

.mode-status-indicator.error .status-icon {
    color: var(--status-error);
}

.mode-status-indicator.warning {
    border-color: var(--status-warning);
    background: rgba(255, 193, 7, 0.05);
}

.mode-status-indicator.warning .status-icon {
    color: var(--status-warning);
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   描述面板
   ========================================================================== */

.mode-description-panel {
    padding: 12px;
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: var(--button-radius);
    margin-bottom: 12px;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--animation-duration) var(--animation-easing);
    pointer-events: none;
}

.mode-description-panel.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.description-content {
    text-align: left;
}

.description-title {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.description-text {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ==========================================================================
   切换器底部
   ========================================================================== */

.mode-switcher-footer {
    padding: 12px var(--switcher-padding);
    border-top: 1px solid var(--switcher-border);
    background: rgba(0, 0, 0, 0.02);
}

.keyboard-hints {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-muted);
}

.hint-text {
    font-weight: 500;
}

.hint-keys {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
}

/* ==========================================================================
   错误提示
   ========================================================================== */

.mode-switcher-error-toast {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 8px;
    padding: 12px;
    background: var(--status-error);
    color: white;
    border-radius: var(--button-radius);
    box-shadow: var(--switcher-shadow);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: errorSlideIn 0.3s ease-out;
}

@keyframes errorSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.error-icon {
    font-size: 16px;
    min-width: 16px;
}

.error-message {
    flex: 1;
    font-size: 13px;
    line-height: 1.4;
}

.error-close {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s ease;
}

.error-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   响应式设计
   ========================================================================== */

@media (max-width: 768px) {
    .mode-switcher {
        min-width: 260px;
        max-width: calc(100vw - 40px);
    }
    
    .mode-switcher.top-right,
    .mode-switcher.top-left {
        top: 10px;
    }
    
    .mode-switcher.top-right {
        right: 10px;
    }
    
    .mode-switcher.top-left {
        left: 10px;
    }
    
    .mode-switcher.bottom-right,
    .mode-switcher.bottom-left {
        bottom: 10px;
    }
    
    .mode-switcher.bottom-right {
        right: 10px;
    }
    
    .mode-switcher.bottom-left {
        left: 10px;
    }
    
    .mode-button {
        padding: 10px;
    }
    
    .mode-icon {
        font-size: 18px;
        min-width: 20px;
    }
    
    .mode-name {
        font-size: 13px;
    }
    
    .mode-shortcut {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .mode-switcher {
        min-width: 240px;
    }
    
    .keyboard-hints {
        display: none;
    }
    
    .mode-switcher-footer {
        display: none;
    }
}

/* ==========================================================================
   高对比度模式
   ========================================================================== */

@media (prefers-contrast: high) {
    .mode-switcher {
        border-width: 2px;
        --switcher-border: #000000;
    }
    
    .mode-button {
        border-width: 2px;
        --button-border: #000000;
    }
    
    .mode-button.active {
        border-width: 3px;
    }
    
    .mode-status-indicator {
        border-width: 2px;
    }
}

/* ==========================================================================
   减少动画模式
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .mode-switcher,
    .mode-button,
    .control-btn,
    .mode-description-panel,
    .progress-bar,
    .mode-switcher-error-toast {
        transition: none;
        animation: none;
    }
    
    .mode-button:hover {
        transform: none;
    }
    
    .mode-switcher.mode-switching {
        transform: none;
    }
    
    .status-icon {
        animation: none !important;
    }
}

/* ==========================================================================
   打印样式
   ========================================================================== */

@media print {
    .mode-switcher {
        display: none;
    }
}

/* ==========================================================================
   焦点和无障碍访问
   ========================================================================== */

.mode-button:focus,
.control-btn:focus {
    outline: 2px solid var(--mode-color, #2196f3);
    outline-offset: 2px;
}

.mode-button:focus-visible,
.control-btn:focus-visible {
    outline: 2px solid var(--mode-color, #2196f3);
    outline-offset: 2px;
}

/* 为屏幕阅读器隐藏装饰性元素 */
.mode-button-overlay,
.status-dot {
    /* aria-hidden should be set via HTML attributes, not CSS */
    pointer-events: none;
}

/* 高对比度文本 */
@media (prefers-contrast: high) {
    .mode-name {
        font-weight: 600;
    }
    
    .description-title {
        font-weight: 600;
    }
}

/* ==========================================================================
   自定义滚动条（如果需要）
   ========================================================================== */

.mode-switcher::-webkit-scrollbar {
    width: 6px;
}

.mode-switcher::-webkit-scrollbar-track {
    background: transparent;
}

.mode-switcher::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.mode-switcher::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}