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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器布局 */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 标题区域 */
.header {
    text-align: center;
    margin-bottom: 0;
    padding: 10px 0;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffd700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 5px;
}

.subtitle {
    font-size: 1.2rem;
    color: #b0c4de;
    font-weight: 300;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 摄像头区域 */
.camera-section {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 10px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.camera-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border-radius: 15px;
    overflow: hidden;
    background: #000;
    aspect-ratio: 1/1;
}

.camera-video,
.captured-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.capture-canvas {
    position: absolute;
    top: 0;
    left: 0;
}

.captured-image-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
}

/* 状态消息 */
.status-message {
    text-align: center;
    margin-top: 15px;
    font-size: 1.1rem;
    color: #87ceeb;
    font-weight: 500;
}

/* 控制按钮区域 */
.controls-section {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 40px;
    font-size: 1.3rem;
    font-weight: 600;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    min-height: 80px;
    min-width: 300px;
    position: relative;
    overflow: hidden;
    margin-top: 20px;
}

.btn:focus {
    outline: 3px solid #ffd700;
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-icon {
    font-size: 1.5rem;
}

.btn-text {
    font-size: 1.2rem;
}

/* 主要按钮 */
.btn-primary {
    background: linear-gradient(45deg, #ff6b6b, #ff8e53);
    color: white;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.6);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px);
}

/* 次要按钮 */
.btn-secondary {
    background: linear-gradient(45deg, #4ecdc4, #44a08d);
    color: white;
    box-shadow: 0 8px 25px rgba(78, 205, 196, 0.4);
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(78, 205, 196, 0.6);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(-1px);
}

/* 音频按钮 */
.btn-audio {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    min-width: 160px;
}

.btn-audio:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.6);
}

/* 小按钮 */
.btn-small {
    padding: 10px 20px;
    font-size: 1rem;
    min-height: 40px;
    min-width: 80px;
    background: linear-gradient(45deg, #ffa726, #ff7043);
}

.btn-small:hover:not(:disabled) {
    transform: translateY(-2px);
}

/* 速度按钮样式 */
.btn-speed {
    padding: 0;
    background-color: transparent; /* 透明背景 */
    border: 1px solid #ccc; /* 添加边框 */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #ccc; /* 设置文字颜色 */
    height: 28px; /* 固定高度 */
    width: 28px;
}

/* 去除按钮焦点时的默认轮廓 */
.btn-speed:focus {
    outline: none;
}

/* 按钮悬停效果 */
.btn-speed:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 音频控制区域布局 */
.audio-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 0 20px; /* 添加一些内边距防止贴边 */
}

/* 速度按钮容器 */
.speed-buttons {
    display: flex;
    gap: 4px;
    justify-content: center;
    width: 30%;
    max-width: 80px; /* 根据按钮数量和大小设置最大宽度 */
    margin: 0 auto;
}

/* 识别结果区域 */
.result-section {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 25px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.result-title {
    font-size: 1.8rem;
    color: #ffd700;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

.result-text {
    font-size: 1.3rem;
    line-height: 1.8;
    color: #ffffff;
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid #ffd700;
}

/* 音频控制 */
.audio-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    align-items: center;
}

.result-audio {
    width: 100%;
    max-width: 400px;
    height: 50px;
}

/* 加载指示器 */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 215, 0, 0.3);
    border-top: 4px solid #ffd700;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.loading-text {
    font-size: 1.2rem;
    color: #87ceeb;
    text-align: center;
}

/* 错误消息 */
.error-message {
    background: linear-gradient(45deg, #ff4757, #ff3838);
    color: white;
    padding: 20px;
    border-radius: 15px;
    margin: 20px 0;
    box-shadow: 0 8px 25px rgba(255, 71, 87, 0.4);
}

.error-content {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.error-icon {
    font-size: 1.5rem;
}

.error-text {
    font-size: 1.1rem;
    flex: 1;
}

/* 帮助区域 */
.footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.help-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.help-toggle {
    font-size: 1.2rem;
    font-weight: 600;
    color: #ffd700;
    cursor: pointer;
    padding: 10px 0;
    list-style: none;
}

.help-toggle::-webkit-details-marker {
    display: none;
}

.help-toggle::before {
    content: "▶ ";
    transition: transform 0.3s ease;
}

.help-section[open] .help-toggle::before {
    transform: rotate(90deg);
}

.help-content {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.help-content h3 {
    color: #87ceeb;
    font-size: 1.1rem;
    margin-bottom: 10px;
    margin-top: 20px;
}

.help-content h3:first-child {
    margin-top: 0;
}

.help-content ol,
.help-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.help-content li {
    margin-bottom: 8px;
    font-size: 1rem;
    line-height: 1.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 18px 30px;
        font-size: 1.1rem;
        min-width: 180px;
    }
    
    .btn-text {
        font-size: 1.1rem;
    }
    
    .controls-section {
        gap: 15px;
    }
    
    .result-text {
        font-size: 1.1rem;
        padding: 15px;
    }
    
    .camera-container {
        aspect-ratio: 1/1;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 15px 25px;
        font-size: 1rem;
        min-width: 75px;
        min-height: 60px;
    }
    
    .btn-icon {
        font-size: 1.3rem;
    }
    
    .btn-text {
        font-size: 1rem;
    }
    
    .controls-section {
        flex-direction: column;
        align-items: center;
    }
    
    .result-text {
        font-size: 1rem;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    body {
        background: #000000;
        color: #ffffff;
    }
    
    .btn-primary {
        background: #ff0000;
        border: 2px solid #ffffff;
    }
    
    .btn-secondary {
        background: #0000ff;
        border: 2px solid #ffffff;
    }
    
    .camera-section,
    .result-section,
    .loading-indicator {
        background: #333333;
        border: 2px solid #ffffff;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-spinner {
        animation: none;
        border: 4px solid #ffd700;
    }
}

/* 打印样式 */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .btn,
    .loading-indicator,
    .error-message {
        display: none;
    }
    
    .camera-section,
    .result-section {
        background: white;
        border: 1px solid black;
    }
}