:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffd700;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    max-width: 1800px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--light-color);
}

.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    min-width: 1200px;
}

/* 上传区域样式 */
.upload-section {
    position: relative;
    padding: 20px;
    background-color: var(--light-color);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.upload-section.expanded {
    padding: 40px 20px;
    background-color: var(--light-color);
    border-color: var(--primary-color);
}

.upload-section.has-file {
    padding: 10px;
    border-style: solid;
    border-color: var(--success-color);
    background-color: white;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.upload-section.has-file .file-info {
    margin: 0;
    padding: 8px 12px;
    background-color: rgba(40, 167, 69, 0.1);
    flex: 1;
    min-width: 200px;
    max-width: none;
}

.upload-section.has-file .video-info {
    margin: 0;
    padding: 8px 12px;
    background-color: rgba(40, 167, 69, 0.1);
    flex: 2;
    min-width: 300px;
    max-width: none;
}

.upload-section.has-file .file-actions {
    margin: 0;
    flex: 0 0 auto;
}

.upload-section.has-file .progress-container {
    margin: 0;
    flex-basis: 100%;
}

.upload-section .drop-text {
    font-size: 16px;
    color: var(--secondary-color);
    margin: 15px 0;
    transition: all 0.3s ease;
}

.upload-section.has-file .drop-text {
    display: none;
}

.file-info-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-name {
    font-weight: 500;
    color: var(--dark-color);
}

.file-size {
    color: var(--secondary-color);
    font-size: 0.9em;
    padding-left: 10px;
    border-left: 1px solid var(--border-color);
}

/* 文件操作按钮 */
.file-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 10px;
}

.control-button {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.control-button:hover {
    opacity: 0.9;
}

.control-button.danger {
    background-color: var(--danger-color);
}

/* 进度条容器 */
.progress-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: 0;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.98);
    border-radius: 8px 8px 0 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 200;
    backdrop-filter: blur(4px);
    display: none;
    flex-direction: column;
    gap: 10px;
}

.progress-container.loading {
    display: flex;
}

.progress-bar {
    position: relative;
    height: 6px;
    background-color: var(--light-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    background-image: linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 16px 16px;
    animation: progress-animation 1s linear infinite;
}

@keyframes progress-animation {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 16px 0;
    }
}

.progress-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 0 5px;
}

.progress-status {
    font-size: 14px;
    color: var(--dark-color);
    flex: 1;
    text-align: left;
    font-weight: 500;
}

.progress-percent {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    min-width: 48px;
    text-align: right;
}

/* 上传提示文本 */
.upload-hint {
    margin: 10px 0;
    color: var(--secondary-color);
    font-size: 14px;
    text-align: center;
}

/* 主要内容区域 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-height: 600px;
}

/* 选项卡样式 */
.tab-controls {
    display: flex;
    gap: 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
}

.tab-button {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    background-color: var(--light-color);
    color: var(--secondary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-button:hover {
    background-color: var(--primary-color);
    color: white;
}

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

/* 选项卡内容 */
.tab-content {
    flex: 1;
    display: none;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* 帧预览区域 */
.frame-preview {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* 帧列和信息面板 */
.frame-info-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 8px;
}

.frame-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.frame-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.frame-details {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 14px;
}

.frame-details span {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    background-color: white;
    border-radius: 4px;
}

.frame-details strong {
    color: var(--primary-color);
}

/* 帧列表容器样式 */
.frame-list-container {
    position: relative;
    height: 80px;
    background-color: white;
    border-radius: 8px;
    padding: 10px 30px;
    overflow: hidden;
}

#frameList {
    height: 100%;
    display: flex;
    gap: 4px;
    overflow-x: auto;
    padding: 0 4px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#frameList::-webkit-scrollbar {
    display: none;
}

/* 导航按钮样式 */
.frame-list-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    z-index: 1;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.frame-list-nav:hover {
    opacity: 1;
}

.frame-list-nav.prev {
    left: 4px;
}

.frame-list-nav.next {
    right: 4px;
}

.frame-list-nav:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
}

.frame-item {
    flex: 0 0 auto;
    width: 30px;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    font-size: 12px;
    padding: 4px;
}

.frame-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.frame-item.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.frame-item .frame-number {
    font-weight: bold;
    margin-bottom: 2px;
}

.frame-item .frame-type {
    font-size: 10px;
    padding: 1px 4px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 2px;
}

.frame-item.error {
    border-color: var(--danger-color);
}

.frame-item.error::after {
    content: '⚠️';
    position: absolute;
    top: -6px;
    right: -6px;
    background-color: var(--danger-color);
}

/* 解码状态指示样式 */
.frame-item.decoded {
    border-color: var(--success-color);
    background-color: rgba(40, 167, 69, 0.1);
}

.frame-item .frame-status {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    font-weight: bold;
}

.frame-item.decoded .frame-status {
    background-color: var(--success-color);
    color: white;
}

.frame-item:not(.decoded) .frame-status {
    background-color: var(--warning-color);
    color: var(--dark-color);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* 解码状态指示器样式 */
.decoding-status {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 14px;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    display: none;
}

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

.decoding-status.completed {
    background-color: var(--success-color);
    color: white;
}

.decoding-status.active::before {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid white;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

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

/* 帧预览容器 */
.frame-canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    min-height: 400px;
}

#frameCanvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.frame-error-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(220, 53, 69, 0.1);
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--danger-color);
    font-weight: bold;
}

/* 播放控制区域 */
.playback-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 10px;
    background-color: var(--light-color);
    border-radius: 8px;
}

.control-button {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.control-button:hover:not(:disabled) {
    background-color: #0056b3;
}

.control-button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
}

/* H.264结构分析区域 */
.h264-analysis {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
    height: calc(100vh - 300px);
    min-height: 600px;
}

.nalu-info-panel {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
}

.nalu-info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.nalu-info-header h3 {
    margin: 0;
    font-size: 16px;
    color: var(--dark-color);
}

.nalu-counter {
    font-size: 14px;
    color: var(--secondary-color);
}

.nalu-navigation {
    display: flex;
    gap: 8px;
}

.nalu-navigation button {
    padding: 4px 8px;
    font-size: 12px;
}

.nalu-type {
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background-color: white;
    border-radius: 4px;
}

.nalu-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
    font-size: 13px;
    margin-bottom: 8px;
}

.nalu-details > div {
    background-color: white;
    padding: 6px 10px;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nalu-details > div::before {
    content: attr(data-label);
    color: var(--secondary-color);
    font-size: 12px;
}

.hex-viewer {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.hex-viewer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.hex-viewer-header h3 {
    margin: 0;
    font-size: 16px;
    color: var(--dark-color);
}

.hex-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    font-family: 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.4;
    background-color: white;
    border-radius: 4px;
    white-space: nowrap;
}

.nalu-byte-info {
    margin-top: 8px;
    background-color: white;
    border-radius: 4px;
    font-size: 13px;
}

.nalu-byte-info h4 {
    margin: 0;
    padding: 6px 10px;
    color: var(--dark-color);
    font-size: 13px;
    border-bottom: 1px solid var(--border-color);
}

.byte-meaning {
    padding: 4px 10px;
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 6px;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.4;
}

.byte-meaning:last-child {
    border-bottom: none;
}

.byte-meaning .label {
    font-weight: 500;
    color: var(--secondary-color);
}

.byte-meaning .value {
    color: var(--dark-color);
}

.byte-meaning .value.highlight {
    color: var(--primary-color);
    font-weight: 500;
}

.nalu-type-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    background-color: white;
    border-radius: 4px;
    padding: 12px;
}

.nalu-type-header .type-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    border-radius: 4px;
    color: white;
    min-width: 200px;
}

.nalu-type-header .type-indicator .type-name {
    font-weight: 600;
    font-size: 16px;
}

.nalu-type-header .type-indicator .type-value {
    font-size: 13px;
    opacity: 0.9;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.nalu-type-header .nalu-size {
    font-size: 13px;
    color: var(--secondary-color);
    background: var(--light-color);
    padding: 6px 12px;
    border-radius: 4px;
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 10px;
    background-color: var(--dark-color);
    color: white;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        min-width: auto;
    }

    .main-content {
        grid-template-columns: 1fr;
    }
}

/* 播放控制区域样式 */
.frame-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.playback-option {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    color: var(--secondary-color);
}

.playback-option input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.playback-option label {
    cursor: pointer;
}

.nalu-payload-info {
    margin-top: 8px;
    background-color: white;
    border-radius: 4px;
    font-size: 13px;
}

.nalu-payload-info h4 {
    margin: 0;
    padding: 6px 10px;
    color: var(--dark-color);
    font-size: 13px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nalu-payload-info h4 button {
    font-size: 12px;
    padding: 2px 6px;
}

.payload-content {
    padding: 6px 10px;
    font-family: 'Fira Code', monospace;
    font-size: 12px;
    line-height: 1.3;
    max-height: 300px;
    overflow-y: auto;
}

.payload-field {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 6px;
    padding: 3px 0;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.4;
}

.payload-field:last-child {
    border-bottom: none;
}

.payload-field .field-name {
    color: var(--secondary-color);
    font-weight: 500;
}

.payload-field .field-value {
    color: var(--dark-color);
}

.payload-field .field-value.highlight {
    color: var(--primary-color);
    font-weight: 500;
}

/* 十进制查看器 */
.hex-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
    max-height: 600px;
    white-space: nowrap;
}

.hex-row {
    display: grid;
    grid-template-columns: 100px minmax(300px, 1fr) 200px;
    gap: 20px;
    padding: 2px 0;
}

.hex-offset {
    color: var(--secondary-color);
}

.hex-bytes {
    display: flex;
    gap: 8px;
}

.hex-byte {
    color: var(--dark-color);
    width: 20px;
    text-align: center;
    display: inline-block;
    padding: 2px 4px;
    border-radius: 2px;
    margin: 0 2px;
}

.hex-byte.start-code {
    background-color: var(--warning-color);
    font-weight: bold;
}

.hex-byte.nalu-type {
    background-color: var(--primary-color);
    color: white;
}

.hex-ascii {
    color: var(--success-color);
    font-family: monospace;
}

.hex-byte-tooltip {
    position: absolute;
    background-color: var(--dark-color);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    z-index: 1000;
    pointer-events: none;
    white-space: normal;
    max-width: 300px;
}

/* 禁用状态 */
.disabled {
    opacity: 0.6;
    pointer-events: none;
    cursor: not-allowed;
}

.disabled * {
    pointer-events: none;
}

/* 上传区域禁用状态 */
.upload-section.disabled {
    background-color: var(--border-color);
    border-color: var(--secondary-color);
}

.upload-section.disabled .upload-icon {
    opacity: 0.5;
}

/* 占位符和空状态样式 */
.placeholder {
    color: var(--secondary-color);
    font-style: italic;
    opacity: 0.7;
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 100px;
    color: var(--secondary-color);
    font-style: italic;
    background-color: var(--light-color);
    border-radius: 8px;
    border: 2px dashed var(--border-color);
}

/* 加载状态样式优化 */
.loading {
    position: relative;
}

.loading::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(2px);
    z-index: 100;
    border-radius: 8px;
}

.loading:not(.progress-container)::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 101;
}

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

/* 空状态样式优化 */
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--secondary-color);
    font-style: italic;
    background-color: var(--light-color);
    border-radius: 8px;
    border: 2px dashed var(--border-color);
    min-height: 100px;
    text-align: center;
    line-height: 1.4;
}

/* 视频信息显示 */
.video-info {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin: 15px 0;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 8px;
    width: 100%;
    max-width: 600px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background-color: white;
    border-radius: 4px;
    min-width: 100px;
    flex: 1;
}

.info-label {
    color: var(--secondary-color);
    font-size: 14px;
}

.info-value {
    font-weight: 500;
    color: var(--primary-color);
}

.info-value.placeholder {
    color: var(--secondary-color);
    font-weight: normal;
    font-style: italic;
}

/* 文件信息显示优化 */
.file-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 12px;
    background-color: var(--light-color);
    border-radius: 4px;
    margin: 15px 0 5px 0;
    width: 100%;
    max-width: 600px;
}

.upload-section.has-file .video-info {
    background-color: rgba(40, 167, 69, 0.1);
}

/* 序列参数集(SPS)信息专用样式 */
.sps-info {
  margin-top: 15px;
  background-color: white;
  border-radius: 4px;
  font-size: 13px;
  padding: 10px;
}

.sps-info h4 {
  margin: 0 0 10px 0;
  padding: 6px 0;
  color: #F44336; /* SPS类型的颜色 */
  font-size: 15px;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.sps-section {
  margin-bottom: 15px;
  background-color: var(--light-color);
  border-radius: 4px;
  padding: 8px;
}

.sps-section h5 {
  margin: 0 0 8px 0;
  font-size: 14px;
  color: var(--dark-color);
  padding-bottom: 5px;
  border-bottom: 1px dashed var(--border-color);
}

.sps-table {
  width: 100%;
  border-collapse: collapse;
}

.sps-table tr {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.sps-table tr:last-child {
  border-bottom: none;
}

.sps-table td {
  padding: 6px;
  vertical-align: top;
}

.sps-table td:first-child {
  width: 40%;
  color: var(--secondary-color);
  font-weight: 500;
}

.sps-table td:last-child {
  color: var(--dark-color);
  font-weight: 500;
}

/* SPS解析错误状态 */
.sps-info.error {
  background-color: rgba(220, 53, 69, 0.1);
  padding: 15px;
  border-left: 3px solid var(--danger-color);
}

.sps-info.error h4 {
  color: var(--danger-color);
  border-bottom: none;
  margin-bottom: 5px;
}

.sps-info.error p {
  color: var(--danger-color);
  margin: 5px 0;
}

.error-details {
  font-family: monospace;
  font-size: 12px;
  background-color: rgba(0, 0, 0, 0.05);
  padding: 8px;
  border-radius: 3px;
  overflow-x: auto;
}

/* 序列参数集字节解析视觉增强 */
.hex-byte.sps-header {
  background-color: var(--primary-color);
  color: white;
}

.hex-byte.sps-profile {
  background-color: #9C27B0; /* 紫色用于Profile相关字节 */
}

.hex-byte.sps-level {
  background-color: #FF9800; /* 橙色用于Level相关字节 */
}

.hex-byte.sps-size {
  background-color: #4CAF50; /* 绿色用于尺寸相关字节 */
}

/* 在十六进制显示中为SPS字节添加特殊颜色提示*/