/* 相对论探索之旅 - 内容页面样式 */

/* 页面布局 */
.page-main {
    padding-top: var(--navbar-height);
    min-height: 100vh;
}

/* 导航栏页面标题样式 */
.nav-page-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.nav-page-icon {
    font-size: var(--text-lg);
}

.nav-page-name {
    font-family: var(--font-heading);
    font-size: var(--text-base);
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-6);
    min-height: calc(100vh - var(--navbar-height));
}

/* 文档区域 - 移至底部 */
.doc-panel {
    order: 2;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    height: fit-content;
    max-height: none;
    overflow-y: visible;
}

/* 演示面板 - 移至顶部 */
.demo-panel {
    order: 1;
}

.doc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--color-border);
}

.doc-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.edit-btn {
    display: none;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.edit-btn:hover {
    background: var(--color-primary-dark);
}

.doc-content {
    font-size: var(--text-sm);
    line-height: 1.8;
}

.doc-content h1 {
    font-size: var(--text-2xl);
    margin-bottom: var(--spacing-4);
}

.doc-content h2 {
    font-size: var(--text-xl);
    margin: var(--spacing-6) 0 var(--spacing-3);
    color: var(--color-primary-light);
}

.doc-content h3 {
    font-size: var(--text-lg);
    margin: var(--spacing-4) 0 var(--spacing-2);
}

.doc-content p {
    margin-bottom: var(--spacing-3);
    color: var(--color-text-secondary);
}

.doc-content ul,
.doc-content ol {
    margin-bottom: var(--spacing-3);
}

.doc-content li {
    margin-bottom: var(--spacing-1);
    color: var(--color-text-secondary);
}

.doc-content strong {
    color: var(--color-text-primary);
}

.doc-content em {
    color: var(--color-secondary);
}

.doc-content blockquote {
    margin: var(--spacing-4) 0;
    padding: var(--spacing-3) var(--spacing-4);
    border-left: 3px solid var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* 交互演示区域 */
.demo-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.demo-canvas-container {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 1.7;
}

.demo-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.demo-overlay {
    position: absolute;
    top: var(--spacing-4);
    left: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.demo-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
}

.demo-value {
    color: var(--color-secondary);
    font-family: var(--font-mono);
    font-weight: 600;
}

/* 控制面板 */
.control-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
}

.control-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--color-text-primary);
}

.control-group {
    margin-bottom: var(--spacing-5);
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.control-value {
    font-family: var(--font-mono);
    color: var(--color-primary-light);
    font-weight: 500;
}

/* 滑块样式 */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
    transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* 控制按钮组 */
.control-buttons {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.control-btn {
    flex: 1;
    min-width: 100px;
    padding: var(--spacing-3) var(--spacing-4);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
}

.control-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.control-btn.primary {
    background: var(--gradient-primary);
    border: none;
}

/* 结果显示 */
.result-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-4);
}

.result-item {
    text-align: center;
    padding: var(--spacing-4);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-lg);
}

.result-label {
    font-size: var(--text-xs);
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-2);
}

.result-value {
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: white;
}

.result-unit {
    font-size: var(--text-sm);
    color: white;
    margin-left: var(--spacing-1);
}

/* 页面导航 */
.page-nav {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-6);
    margin-top: auto;
}

.page-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.page-nav-link:hover {
    border-color: var(--color-primary);
    transform: translateX(5px);
}

.page-nav-link.prev:hover {
    transform: translateX(-5px);
}

.page-nav-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.page-nav-title {
    font-size: var(--text-base);
    color: var(--color-text-primary);
    font-weight: 500;
}

.page-nav-arrow {
    font-size: var(--text-xl);
    color: var(--color-primary);
}

/* 编辑器模态框 */
.editor-modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
}

.editor-modal.active {
    display: flex;
}

.editor-modal .modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
}

.editor-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
}

.editor-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

.editor-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.editor-textarea {
    flex: 1;
    padding: var(--spacing-4);
    background: var(--color-bg-tertiary);
    border: none;
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.6;
    resize: none;
    outline: none;
}

.editor-preview {
    flex: 1;
    padding: var(--spacing-4);
    overflow-y: auto;
    border-left: 1px solid var(--color-border);
}

.editor-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

/* 响应式布局 */
@media (max-width: 1024px) {
    .doc-panel {
        max-height: none;
    }
}

@media (max-width: 768px) {
    .page-container {
        padding: var(--spacing-4);
    }

    .control-buttons {
        flex-direction: column;
    }

    .page-nav {
        flex-direction: column;
        gap: var(--spacing-3);
    }

    .result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ======== 媒体资源展示区域 ======== */
.media-section {
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

.media-section-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

/* 图片和视频网格 */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.media-item {
    position: relative;
    aspect-ratio: 16/10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.media-item:hover {
    border-color: var(--color-primary);
    transform: scale(1.02);
}

.media-item img,
.media-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 50%, rgba(0, 0, 0, 0.8));
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-3);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.media-item:hover .media-item-overlay {
    opacity: 1;
}

.media-item-name {
    font-size: var(--text-sm);
    color: white;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.media-item-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    transition: all var(--transition-fast);
}

.media-item:hover .media-item-play {
    transform: translate(-50%, -50%) scale(1.1);
    background: var(--color-primary);
}

/* 管理员删除按钮 */
.media-item-delete {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    width: 24px;
    height: 24px;
    background: rgba(239, 68, 68, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 14px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.admin-mode .media-item-delete {
    display: flex;
}

.media-item-delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* 链接和文档列表 */
.resource-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.resource-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-primary);
}

.resource-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.resource-info {
    flex: 1;
    min-width: 0;
}

.resource-name {
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-url {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-delete {
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.admin-mode .resource-delete {
    display: flex;
}

.resource-delete:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #ef4444;
}

/* ======== 灯箱组件 ======== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-content img,
.lightbox-content video,
.lightbox-content iframe {
    max-width: 90vw;
    max-height: 85vh;
    border-radius: var(--radius-lg);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.lightbox-caption {
    position: absolute;
    bottom: -40px;
    left: 0;
    right: 0;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

/* ======== 编辑器增强 ======== */
.editor-container {
    max-width: 1100px;
}

.editor-tabs {
    display: flex;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--color-border);
}

.editor-tab {
    padding: var(--spacing-2) var(--spacing-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.editor-tab:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

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

.editor-tab-content {
    display: none;
    flex: 1;
    overflow: hidden;
}

.editor-tab-content.active {
    display: flex;
}

/* 资源添加表单 */
.resource-form {
    padding: var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    flex: 1;
    overflow-y: auto;
}

.resource-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.resource-form-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.resource-form-input {
    padding: var(--spacing-3);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    outline: none;
    transition: border-color var(--transition-fast);
}

.resource-form-input:focus {
    border-color: var(--color-primary);
}

.resource-form-input::placeholder {
    color: var(--color-text-muted);
}

.resource-form-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-4);
}

.resource-form-actions {
    display: flex;
    gap: var(--spacing-3);
    margin-top: var(--spacing-4);
}

.resource-form-btn {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.resource-form-btn.primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.resource-form-btn.secondary {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.resource-form-btn:hover {
    transform: translateY(-2px);
}

/* 已添加资源列表 */
.resource-list-panel {
    flex: 1;
    padding: var(--spacing-4);
    border-left: 1px solid var(--color-border);
    overflow-y: auto;
}

.resource-list-title {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-3);
}

.resource-list-empty {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    text-align: center;
    padding: var(--spacing-8);
}

/* 文件上传按钮 */
.file-upload-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-upload-label:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.file-upload-input {
    display: none;
}

/* 提示信息 */
.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-1);
}

/* 响应式 */
@media (max-width: 768px) {
    .media-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .resource-form-row {
        grid-template-columns: 1fr;
    }

    .lightbox-content img,
    .lightbox-content video {
        max-width: 95vw;
        max-height: 70vh;
    }
}