:root {
    --primary-color: #007AFF;
    --background-color: #f5f5f7;
    --border-color: #d2d2d7;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: #1d1d1f;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 600;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.upload-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 2px dashed var(--border-color);
}

.upload-area {
    text-align: center;
    cursor: pointer;
}

.upload-icon {
    fill: var(--primary-color);
    margin-bottom: 1rem;
}

.settings {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.quality-control, .bitrate-control {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.quality-options {
    display: flex;
    gap: 1.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: 16px;
    height: 16px;
    margin: 0;
    cursor: pointer;
}

.radio-label span {
    font-size: 0.9rem;
    user-select: none;
}

select {
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.preview-container {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
}

.file-list {
    margin-top: 1rem;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.file-info {
    flex: 1;
}

.progress-bar {
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    margin-top: 0.5rem;
}

.progress {
    height: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    width: 0;
    transition: width 0.3s ease;
}

.action-buttons {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.primary-button {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.primary-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.secondary-button {
    background: white;
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.file-item {
    position: relative;
    padding-right: 100px;
}

.file-status {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    color: #666;
}

.thumbnail-container {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.thumbnail-scroll {
    display: flex;
    gap: 1rem;
    min-height: 100px;
}

.thumbnail-item {
    position: relative;
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    border-radius: 8px;
    overflow: hidden;
    background: var(--background-color);
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-thumbnail {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    padding: 0;
    line-height: 1;
}

.remove-thumbnail:hover {
    background: rgba(0, 0, 0, 0.7);
}

.thumbnail-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: #666;
    font-size: 0.8rem;
    text-align: center;
    padding: 0.5rem;
}

.thumbnail-status {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 4px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    font-size: 0.8rem;
    text-align: center;
}

.download-button {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 0;
}

.download-button:hover {
    background: #0056b3;
}

.thumbnail-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.compression-info {
    display: flex;
    gap: 2rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-label {
    color: #666;
}

.export-container {
    display: flex;
    gap: 1rem;
}

.secondary-button svg {
    vertical-align: middle;
    display: inline-block;
}

.secondary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: #ccc;
    color: #666;
}

.custom-quality {
    margin-top: 1rem;
    margin-left: 5.5rem;
}

.quality-input-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quality-input-group input {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.quality-unit {
    color: #666;
}

.quality-hint {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: #666;
}

/* 媒体容器切换 */
.media-container {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
}

/* 音频列表样式 */
.audio-list-container {
    min-height: 194px; /* 增加60px */
    background: white;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.audio-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 10px; /* 为滚动条留出空间 */
    min-height: 180px; /* 增加60px */
    display: flex;
    align-items: center;
}

.audio-list {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    width: 100%;
    min-height: 180px; /* 增加60px */
}

.audio-item {
    flex: 0 0 200px; /* 固定宽度 */
    height: 200px; /* 增加60px */
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 8px;
    position: relative;
    justify-content: space-between; /* 更好的内容分布 */
}

.audio-info {
    width: 100%;
    text-align: center;
    margin-bottom: 12px; /* 统一间距 */
}

.audio-name {
    font-weight: 500;
    margin-bottom: 12px; /* 统一间距 */
    /* 文件名过长时显示省略号 */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

.audio-status {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 12px; /* 统一间距 */
}

.remove-audio {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 0;
    transition: all 0.3s ease;
}

.remove-audio:hover {
    background: rgba(0, 0, 0, 0.7);
}

.play-audio {
    width: 28.8px;
    height: 28.8px;
    flex: 0 0 28.8px;
    border-radius: 50%;
    border: none;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin: 4px auto;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transform: translateY(-10px);
}

.play-audio svg {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
}

.play-audio:hover {
    background: #0051d4;
    transform: scale(1.05);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

.play-audio:active {
    transform: scale(0.95);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.audio-size {
    font-size: 0.9rem;
    color: #666;
    gap: 12px; /* 统一间距 */
    display: flex;
    flex-direction: column;
}

.size-info {
    display: flex;
    align-items: center;
}

.size-label {
    min-width: 85px;
    text-align: right;
    margin-right: 4px;
}

.compressed-size {
    color: var(--primary-color);
}

.audio-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 空列表提示 */
/* .audio-list:empty::before {
    content: attr(data-empty-text);
    color: #666;
    width: 100%;
    text-align: center;
    font-size: 0.9rem;
} */

.bitrate-control {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    position: relative; /* 为下拉框定位提供参考 */
}

.bitrate-control label {
    color: #666;
    min-width: 84px; /* 固定标签宽度，确保对齐 */
}

.bitrate-control select {
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    width: 200px; /* 固定下拉框宽度 */
    position: relative; /* 确保下拉框在正确的位置 */
    z-index: 1; /* 确保下拉列表显示在其他元素之上 */
}

/* 美化下拉框样式 */
.bitrate-control select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

/* 下拉框选项样式 */
.bitrate-control select option {
    padding: 8px;
    font-size: 14px;
}

/* 确保下拉列表与选择框对齐 */
.bitrate-control select option:checked {
    background: var(--primary-color);
    color: white;
}

/* 替换原来的语言切换按钮样式 */
.language-switch {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 100;
}

.lang-selector {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    min-width: 100px;
}

.lang-selector:hover {
    background: var(--background-color);
    border-color: var(--primary-color);
}

.current-lang {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}

.arrow-icon {
    margin-left: auto;
    opacity: 0.5;
    transition: transform 0.3s ease;
}

.lang-selector.active .arrow-icon {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 140px;
    display: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.lang-dropdown.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.lang-option {
    padding: 0.5rem 1rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    transition: background-color 0.3s ease;
}

.lang-option:hover {
    background-color: var(--background-color);
}

.lang-option.active {
    background-color: rgba(0, 122, 255, 0.1);
}

.lang-name {
    font-weight: 500;
    color: #333;
}

.lang-native {
    font-size: 0.8rem;
    color: #666;
}