/* 华讯中星素材管理系统 - 全局样式 */
:root {
    --primary-color: #1A56DB;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --bg-color: #f5f7fa;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --card-bg: #ffffff;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --warning-color: #f59e0b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    height: 60px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(26, 86, 219, 0.08);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: 16px;
    padding-left: 16px;
    border-left: 1px solid var(--border-color);
}

.user-name {
    color: var(--text-color);
    font-weight: 500;
}

/* 按钮 */
.btn-primary, .btn-secondary, .btn-danger, .btn-full {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #e5e7eb;
}

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

.btn-danger:hover {
    background: #b91c1c;
}

.btn-full {
    width: 100%;
    background: var(--primary-color);
    color: white;
    padding: 12px;
}

.btn-logout {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-light);
}

.btn-logout:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* 主内容 */
.main-content {
    min-height: calc(100vh - 60px);
}

.content-layout {
    display: flex;
    gap: 0;
    min-width: 0;
    align-items: flex-start;
}

/* 侧边栏 */
.sidebar {
    width: 240px;
    min-width: 240px;
    flex: 0 0 240px;
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 16px 0;
    height: calc(100vh - 60px);
    overflow-y: auto;
    position: sticky;
    top: 60px;
    transition: width 0.2s ease, min-width 0.2s ease, flex-basis 0.2s ease, padding 0.2s ease;
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    flex-basis: 0;
    padding-left: 0;
    padding-right: 0;
    overflow: hidden;
    border-right: none;
}

.sidebar-title {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 8px;
    padding: 0 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.category-tree {
    font-size: 14px;
}

/* 全部素材 */
.tree-all {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    cursor: pointer;
    color: var(--text-color);
    border-left: 3px solid transparent;
    transition: all 0.15s;
    user-select: none;
}

.tree-all:hover {
    background: var(--bg-color);
}

.tree-all.selected {
    background: rgba(26, 86, 219, 0.06);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.tree-all .tree-icon {
    font-size: 15px;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

/* 树节点 */
.tree-node {
    user-select: none;
}

.tree-node-content {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 16px 6px 0;
    cursor: pointer;
    color: var(--text-color);
    border-left: 3px solid transparent;
    transition: all 0.15s;
    position: relative;
}

.tree-node-content:hover {
    background: var(--bg-color);
}

.tree-node-content.selected {
    background: rgba(26, 86, 219, 0.06);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

/* 展开/折叠箭头 */
.tree-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-light);
    flex-shrink: 0;
    border-radius: 3px;
    transition: transform 0.2s;
}

.tree-toggle:hover {
    background: rgba(0, 0, 0, 0.06);
}

.tree-toggle.expanded {
    transform: rotate(90deg);
}

/* 分类图标 */
.tree-icon {
    font-size: 14px;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

/* 分类名称 */
.tree-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 子节点容器 */
.tree-children {
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.tree-children.collapsed {
    max-height: 0 !important;
}

/* 子节点缩进 - 用左侧竖线连接 */
.tree-node .tree-children {
    border-left: 1px solid var(--border-color);
    margin-left: 10px;
}

.tree-node .tree-children .tree-node-content {
    padding-left: 12px;
}

/* 三级分类缩进更深 */
.tree-node .tree-children .tree-children {
    margin-left: 8px;
}

.tree-node .tree-children .tree-children .tree-node-content {
    padding-left: 12px;
}

/* 主内容区 */
.content-main {
    flex: 1;
    min-width: 0;
    overflow-x: hidden;
    padding: 24px;
}

/* 工具栏 */
.toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.sort-select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background: white;
}

/* 素材卡片网格 */
.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.material-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: box-shadow 0.2s;
    cursor: pointer;
}

.material-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.material-card .card-thumb {
    width: 100%;
    height: 160px;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.material-card .card-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.material-card .card-thumb .file-icon {
    font-size: 48px;
}

.material-card .card-body {
    padding: 12px;
}

.material-card .card-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-card .card-meta {
    font-size: 12px;
    color: var(--text-light);
    display: flex;
    gap: 12px;
}

.material-card .card-checkbox {
    position: absolute;
    top: 8px;
    right: 8px;
}

.material-card {
    position: relative;
}

/* 分页 */
.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    margin-top: 24px;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    flex-shrink: 0;
    white-space: nowrap;
}

.pagination .pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    color: var(--text-light);
}

.pagination button:hover {
    background: var(--bg-color);
}

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

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 登录页 */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-color);
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    width: 400px;
    max-width: 90%;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    border-radius: 12px;
}

.login-header h1 {
    font-size: 22px;
    margin-bottom: 4px;
}

.login-header p {
    color: var(--text-light);
    font-size: 14px;
}

/* 表单 */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.login-form input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

/* 预览页 */
.preview-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.preview-header h2 {
    flex: 1;
}

.preview-actions {
    display: flex;
    gap: 8px;
}

.preview-body {
    display: flex;
    gap: 24px;
}

.preview-area {
    flex: 1;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-height: 600px;
    padding: 20px;
    overflow: auto;
}

/* 预览导航（左右切换） */
.preview-main {
    flex: 1;
    position: relative;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.preview-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px;
    pointer-events: none;
    z-index: 10;
}

.preview-nav-btn {
    pointer-events: all;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.45);
    color: white;
    border: none;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    user-select: none;
    -webkit-user-select: none;
}

.preview-nav-btn:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.7);
}

.preview-nav-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}

.preview-nav-counter {
    pointer-events: all;
    background: rgba(0, 0, 0, 0.45);
    color: white;
    padding: 4px 14px;
    border-radius: 14px;
    font-size: 13px;
    user-select: none;
    -webkit-user-select: none;
}

.preview-sidebar {
    width: 320px;
}

.info-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}

.info-card h3 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--text-light);
    text-transform: uppercase;
}

.info-list div {
    padding: 4px 0;
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.info-list .info-label {
    color: var(--text-light);
}

.version-list {
    font-size: 13px;
}

.version-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.version-item:last-child {
    border-bottom: none;
}

/* 上传页 */
.upload-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 24px;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 48px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 24px;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(26, 86, 219, 0.05);
}

.drop-zone-content {
    color: var(--text-light);
}

.drop-zone-content p {
    margin-top: 12px;
}

.upload-form {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
}

/* 管理后台 */
.admin-container {
    padding: 24px;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.tab-btn {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* 数据表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-light);
    font-size: 13px;
    text-transform: uppercase;
}

/* 分享页 */
.share-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.share-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    width: 800px;
    max-width: 100%;
}

.share-header {
    text-align: center;
    margin-bottom: 24px;
}

.share-logo {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.share-header h1 {
    font-size: 18px;
}

.share-header p {
    color: var(--text-light);
    font-size: 14px;
}

.code-prompt {
    text-align: center;
    padding: 20px;
}

.code-input-group {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

/* 通知 */
.notification {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 9999;
    min-width: 300px;
}

.notification .toast {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    margin-bottom: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    animation: slideIn 0.3s ease;
}

.notification .toast.success {
    border-left: 4px solid var(--success-color);
}

.notification .toast.error {
    border-left: 4px solid var(--danger-color);
}

.notification .toast.info {
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 工具类 */
.loading-text {
    text-align: center;
    color: var(--text-light);
    padding: 40px;
}

.file-type-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.file-type-badge.image { background: #dbeafe; color: #1e40af; }
.file-type-badge.pdf { background: #fee2e2; color: #991b1b; }
.file-type-badge.video { background: #f3e8ff; color: #6b21a8; }
.file-type-badge.word { background: #dbeafe; color: #1e3a8a; }
.file-type-badge.excel { background: #d1fae5; color: #065f46; }
.file-type-badge.ppt { background: #ffedd5; color: #9a3412; }
.file-type-badge.other { background: #f3f4f6; color: #4b5563; }

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.modal-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    width: 520px;
    max-width: 90%;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    color: var(--text-light);
    padding: 4px 8px;
    border-radius: 4px;
}

.modal-close:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

.modal-form .form-group {
    margin-bottom: 16px;
}

.form-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.form-checkbox-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 400;
    cursor: pointer;
}

.required {
    color: var(--danger-color);
}

/* 目录按钮 - 仅窄屏显示 */
.sidebar-toggle-btn {
    display: inline-block;
}

/* 侧边栏关闭按钮 - 仅窄屏显示 */
.sidebar-close {
    display: none;
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    font-size: 20px;
    color: var(--text-light);
    cursor: pointer;
    border-radius: 4px;
    z-index: 10;
}

.sidebar-close:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

/* 抽屉遮罩 */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 998;
}

/* 响应式 - 断点从 768px 调整为 640px，避免桌面端误触发隐藏侧边栏 */
@media (max-width: 640px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 999;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        height: 100vh;
        box-shadow: 2px 0 8px rgba(0,0,0,0.15);
    }
    .sidebar.collapsed {
        width: 240px;
        min-width: 240px;
        flex-basis: 240px;
        padding: 16px 0;
        border-right: 1px solid var(--border-color);
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .sidebar-toggle-btn {
        display: inline-block;
    }
    .sidebar-close {
        display: flex;
    }
    .sidebar-overlay.show {
        display: block;
    }
    .preview-body { flex-direction: column; }
    .preview-sidebar { width: 100%; }
    .material-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
    .modal-card { width: 95%; }
    .preview-nav-btn { width: 36px; height: 36px; font-size: 22px; }
}

.pdf-canvas-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.pdf-page-canvas {
    max-width: 100%;
    height: auto;
    background: #fff;
    box-shadow: 0 1px 6px rgba(15, 23, 42, 0.15);
}