/* 机场登机口语音播报系统 - 扁平化设计 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 扁平化色彩系统 */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #BBDEFB;
    --secondary-color: #FF5722;
    --accent-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --success-color: #4CAF50;
    
    /* 中性色 */
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --bg-dark: #263238;
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #BDBDBD;
    --border-color: #E0E0E0;
    --border-light: #F5F5F5;
    
    /* 阴影系统 */
    --shadow-1: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-2: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-3: 0 8px 16px rgba(0,0,0,0.15);
    --shadow-4: 0 12px 24px rgba(0,0,0,0.18);
    
    /* 间距和尺寸 */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 动画 */
    --transition: all 0.2s ease-in-out;
    --transition-fast: all 0.15s ease-in-out;
}

body {
    font-family: 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* 头部样式 - 扁平化设计 */
.header {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--primary-color);
}

.header h1 {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header h1 i {
    color: var(--primary-color);
    font-size: 1.8rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.status-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
    transition: var(--transition);
}

.status-icon i {
    display: block;
    width: 100%;
    height: 100%;
}

.status-ready {
    background: var(--success-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-1);
}

.status-playing {
    background: var(--primary-color);
    animation: pulse 2s infinite;
}

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

@keyframes pulse {
    0%, 100% { 
        box-shadow: var(--shadow-1);
        transform: scale(1);
    }
    50% { 
        box-shadow: var(--shadow-2);
        transform: scale(1.05);
    }
}

/* 主要内容区域 - 扁平化网格布局 */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.main-content > section:nth-child(1) {
    grid-column: 1 / -1;
}

.main-content > section:nth-child(2) {
    grid-column: 1 / -1;
}

.main-content > section:nth-child(3) {
    grid-column: 1 / -1;
}

.main-content > section:nth-child(4) {
    grid-column: 1 / -1;
}

.main-content > section:nth-child(5) {
    grid-column: 1 / -1;
}

section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-1);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

section:hover {
    box-shadow: var(--shadow-2);
    transform: translateY(-2px);
}

section h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

section h2::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 模板网格 - 扁平化卡片设计 */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.template-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    position: relative;
    min-height: 120px;
    justify-content: center;
}

.template-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.template-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-1);
}

.template-icon {
    font-size: 2.2rem;
    color: var(--primary-color);
    transition: var(--transition);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    line-height: 1;
}

.template-icon i {
    display: block;
    width: 100%;
    height: 100%;
}

.template-btn:hover .template-icon {
    transform: scale(1.1);
}

.template-title {
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
    color: var(--text-primary);
}

.template-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 400;
}

/* 输入区域 - 扁平化设计 */
.input-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

#textInput {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
    color: var(--text-primary);
    transition: var(--transition);
}

#textInput::placeholder {
    color: var(--text-light);
}

#textInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* 按钮样式 - 扁平化设计 */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
    vertical-align: middle;
}

/* 按钮图标样式 - Font Awesome 优化 */
.btn-icon {
    font-size: 1.1rem;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
    transition: var(--transition);
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon i {
    display: block;
    width: 100%;
    height: 100%;
    line-height: 1;
}

.btn-text {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.btn:hover .btn-icon {
    transform: scale(1.1);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-1);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-2);
    transform: translateY(-1px);
}

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

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

.btn-info {
    background: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-1);
}

.btn-info:hover {
    background: #45a049;
    box-shadow: var(--shadow-2);
    transform: translateY(-1px);
}

.btn-warning {
    background: var(--warning-color);
    color: white;
    box-shadow: var(--shadow-1);
}

.btn-warning:hover {
    background: #f57c00;
    box-shadow: var(--shadow-2);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    box-shadow: var(--shadow-1);
}

.btn-danger:hover {
    background: #d32f2f;
    box-shadow: var(--shadow-2);
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: row;
    gap: var(--spacing-sm);
    min-height: 48px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* 语音设置 - 优化布局设计 */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
    position: relative;
}

.setting-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-2);
    transform: translateY(-2px);
}

.setting-item label {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.setting-item label::before {
    content: '';
    width: 3px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 2px;
}

.setting-item select {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232196F3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.setting-item select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.setting-item input[type="range"] {
    padding: 0;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    outline: none;
    border: none;
    appearance: none;
    margin: var(--spacing-sm) 0;
}

.setting-item input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-2);
    transition: var(--transition);
    border: 3px solid white;
}

.setting-item input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-3);
    background: var(--primary-dark);
}

.setting-item input[type="range"]::-webkit-slider-track {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
}

.setting-item span {
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    font-size: 1.1rem;
    background: var(--primary-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--primary-color);
    min-width: 60px;
    display: inline-block;
}

/* 特殊布局调整 */
.setting-item:nth-child(1) {
    grid-column: 1 / 3;
    background: linear-gradient(135deg, var(--primary-light), rgba(33, 150, 243, 0.1));
    border-color: var(--primary-color);
}

.setting-item:nth-child(1) select {
    max-width: 300px;
    background: white;
    border-color: var(--primary-color);
}

.setting-item:nth-child(1):hover {
    background: linear-gradient(135deg, var(--primary-light), rgba(33, 150, 243, 0.15));
}

/* 滑块数值显示优化 */
.setting-item span {
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    font-size: 1.1rem;
    background: var(--primary-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    border: 2px solid var(--primary-color);
    min-width: 60px;
    display: inline-block;
    position: relative;
}

.setting-item span::after {
    content: '';
    position: absolute;
    top: 50%;
    left: -8px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 8px solid var(--primary-color);
}

/* 滑块轨道填充效果 */
.setting-item input[type="range"] {
    position: relative;
}

.setting-item input[type="range"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 8px;
    background: var(--primary-color);
    border-radius: 4px;
    width: var(--range-progress, 0%);
    pointer-events: none;
}

/* 滑块容器优化 */
.setting-item:has(input[type="range"]) {
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.setting-item:has(input[type="range"]) .slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xs);
}

.setting-item:has(input[type="range"]) input[type="range"] {
    flex: 1;
    margin: 0;
}

.setting-item:has(input[type="range"]) span {
    flex-shrink: 0;
    margin: 0;
}

/* 播放控制 - 扁平化设计 */
.controls-container {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.progress-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.time-display {
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

/* 历史记录 - 扁平化设计 */
.history-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
}

.history-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.history-item:hover {
    box-shadow: var(--shadow-1);
    transform: translateX(4px);
}

.history-item:last-child {
    margin-bottom: 0;
}

.history-content {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.history-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.history-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.history-time {
    font-weight: 600;
    background: var(--primary-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-color);
    font-size: 0.8rem;
}

.history-duration {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.75rem;
    background: var(--border-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.history-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
}

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

.history-btn i {
    font-size: 0.875rem;
}

.history-empty {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-xl);
    font-size: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
}

/* 响应式设计 - 扁平化适配 */
@media (max-width: 1200px) {
    .settings-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .setting-item:nth-child(1) {
        grid-column: 1 / -1;
    }
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .main-content > section:nth-child(4),
    .main-content > section:nth-child(5) {
        grid-column: 1;
    }
    
    .settings-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
        padding: var(--spacing-lg);
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .template-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }
    
    .template-btn {
        padding: var(--spacing-sm);
        min-height: 80px;
        font-size: 0.9rem;
    }
    
    .template-icon {
        font-size: 1.2rem;
    }
    
    .template-title {
        font-size: 0.9rem;
        margin: var(--spacing-xs) 0;
    }
    
    .template-desc {
        font-size: 0.75rem;
        line-height: 1.2;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        max-width: 100%;
    }
    
    .setting-item:nth-child(1) {
        grid-column: 1 / -1;
    }
    
    .setting-item:nth-child(1) select {
        max-width: 100%;
    }
    
    .controls-container {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
        flex-wrap: wrap;
    }
    
    .btn-large {
        flex: 1;
        min-width: 80px;
        max-width: 120px;
        padding: var(--spacing-md) var(--spacing-md);
        font-size: 0.9rem;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: row;
        gap: var(--spacing-xs);
    }
    
    .input-actions {
        justify-content: center;
    }
    
    .history-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .history-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .template-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xs);
    }
    
    .template-btn {
        min-height: 70px;
        padding: var(--spacing-xs);
        font-size: 0.8rem;
    }
    
    .template-icon {
        font-size: 1rem;
    }
    
    .template-title {
        font-size: 0.8rem;
        margin: 2px 0;
    }
    
    .template-desc {
        font-size: 0.7rem;
        line-height: 1.1;
    }
    
    section {
        padding: var(--spacing-md);
        margin: 0;
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }
    
    .btn-large {
        flex: 1;
        min-width: 70px;
        max-width: 100px;
        padding: var(--spacing-sm) var(--spacing-sm);
        font-size: 0.8rem;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: row;
        gap: 4px;
    }
    
    .settings-grid {
        gap: var(--spacing-sm);
    }
    
    .setting-item {
        padding: var(--spacing-sm);
    }
    
    .history-actions {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .history-btn {
        width: 100%;
        text-align: center;
    }
}

/* 滚动条样式 - 扁平化设计 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

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

/* 焦点可见性 */
.btn:focus-visible,
.template-btn:focus-visible,
#textInput:focus-visible,
.setting-item select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --bg-secondary: #FFFFFF;
        --border-light: #000000;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}