/* edu-python 页面：现代化目录 + Markdown 阅读布局 */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding-top: 60px;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.edu-layout {
    --edu-sidebar-width: 340px;
    --edu-side-panel-width: 260px;
    display: flex;
    height: calc(100vh - var(--fe-navbar-height, 60px));
    min-height: 0;
    overflow: hidden;
}

.edu-layout.edu-layout--resizing .edu-sidebar,
.edu-layout.edu-layout--resizing .edu-side-panel,
.edu-layout.edu-layout--resizing .content-grid {
    transition: none;
}

body.edu-is-resizing {
    cursor: col-resize;
    user-select: none;
}

body.edu-is-resizing * {
    cursor: col-resize !important;
}

.edu-sidebar {
    width: var(--edu-sidebar-width, 340px);
    height: 100%;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease;
    flex-shrink: 0;
    overflow: hidden;
    position: relative;
    min-width: 0;
}

.edu-sidebar.collapsed {
    width: 0;
    border-right: none;
    overflow: hidden;
}

.sidebar-toolbar {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-toolbar h2 {
    margin: 0;
    font-size: 18px;
}

.sidebar-toolbar-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.browse-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
}

.browse-back-btn {
    align-self: flex-start;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 12px;
    cursor: pointer;
}

.browse-back-btn:hover {
    color: var(--primary-color);
    border-color: color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
}

.browse-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.browse-breadcrumb__link {
    border: none;
    background: transparent;
    color: var(--primary-color);
    padding: 0;
    cursor: pointer;
    font: inherit;
}

.browse-breadcrumb__link:hover {
    text-decoration: underline;
}

.browse-breadcrumb__sep {
    color: var(--text-secondary);
    opacity: 0.7;
}

.browse-breadcrumb__current {
    color: var(--text-primary);
    font-weight: 600;
}

.sidebar-toolbar input[type="search"] {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 8px 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.browse-list,
.tree-list {
    list-style: none;
    margin: 0;
    padding: 8px;
    overflow-y: auto;
    flex: 1;
}

.browse-dir-item,
.browse-file-item,
.directory-item,
.file-item {
    list-style: none;
    margin-bottom: 2px;
}

.browse-dir-btn,
.browse-file-btn,
.directory-header,
.file-btn {
    width: 100%;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    border-radius: 10px;
    padding: 8px 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.browse-dir-btn:hover,
.browse-file-btn:hover,
.directory-header:hover,
.file-btn:hover {
    background: var(--primary-light);
    border-color: color-mix(in srgb, var(--primary-color) 12%, transparent);
}

.browse-dir-btn:hover {
    box-shadow: inset 3px 0 0 var(--primary-color);
}

.browse-file-btn.active,
.file-btn.active {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: transparent;
    box-shadow: none;
}

.browse-item-icon {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.browse-item-icon--dir {
    background: color-mix(in srgb, var(--primary-color) 16%, var(--bg-primary));
}

.browse-item-icon--dir::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 8px;
    width: 10px;
    height: 4px;
    border-radius: 2px 2px 0 0;
    background: color-mix(in srgb, var(--primary-color) 88%, white);
}

.browse-item-icon--dir::after {
    content: "";
    position: absolute;
    top: 12px;
    left: 8px;
    width: 14px;
    height: 10px;
    border-radius: 0 2px 3px 3px;
    background: var(--primary-color);
    opacity: 0.92;
}

.browse-item-icon--file {
    background: color-mix(in srgb, var(--text-secondary) 12%, var(--bg-primary));
    border: 1px solid color-mix(in srgb, var(--border-color) 80%, transparent);
}

.browse-item-icon--file::before {
    content: "";
    position: absolute;
    top: 7px;
    left: 9px;
    width: 10px;
    height: 13px;
    border-radius: 2px;
    background: var(--bg-secondary);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--text-secondary) 35%, transparent);
}

.browse-item-icon--file::after {
    content: "";
    position: absolute;
    top: 7px;
    left: 15px;
    width: 4px;
    height: 4px;
    background: color-mix(in srgb, var(--text-secondary) 20%, var(--bg-secondary));
    clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.browse-file-btn.active .browse-item-icon--file {
    background: color-mix(in srgb, var(--text-inverse) 18%, transparent);
    border-color: color-mix(in srgb, var(--text-inverse) 28%, transparent);
}

.browse-file-btn.active .browse-item-icon--file::before {
    background: color-mix(in srgb, var(--text-inverse) 12%, var(--primary-color));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--text-inverse) 35%, transparent);
}

.browse-item-label {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.browse-item-name {
    flex: 1;
    min-width: 0;
    font-size: 13px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.browse-item-count {
    flex-shrink: 0;
    min-width: 22px;
    padding: 1px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    color: var(--text-secondary);
    background: color-mix(in srgb, var(--border-color) 55%, var(--bg-primary));
}

.browse-dir-btn:hover .browse-item-count {
    color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 12%, var(--bg-primary));
}

.browse-file-btn.active .browse-item-count {
    color: color-mix(in srgb, var(--text-inverse) 88%, transparent);
    background: color-mix(in srgb, var(--text-inverse) 18%, transparent);
}

.browse-item-chevron {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    position: relative;
    opacity: 0.45;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.browse-item-chevron::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 4px;
    width: 7px;
    height: 7px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: translateY(-50%) rotate(45deg);
}

.browse-dir-btn:hover .browse-item-chevron {
    opacity: 0.9;
    color: var(--primary-color);
    transform: translateX(2px);
}

.directory-children {
    list-style: none;
    margin: 0;
    padding-left: 18px;
}

.hidden,
.search-hidden {
    display: none !important;
}

.info-item {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 8px 10px;
}

.edu-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    overflow: hidden;
    position: relative;
    container-type: inline-size;
    container-name: edu-main;
}

.content-toolbar {
    flex-shrink: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 12%, var(--border-color));
    background: color-mix(in srgb, var(--bg-secondary, #fff) 92%, var(--primary-color, #0288d1) 3%);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.content-toolbar--compact {
    min-height: 0;
    padding: 5px 12px;
    flex-wrap: nowrap;
    justify-content: flex-start;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toolbar-left {
    flex: 1;
    min-width: 0;
    gap: 0;
}

.toolbar-right {
    flex-shrink: 0;
    margin-left: auto;
}

.toolbar-nav-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.toolbar-left .toolbar-ai-actions {
    margin-left: 18px;
    padding-left: 16px;
    border-left: 1px solid color-mix(in srgb, var(--border-color) 88%, var(--primary-color, #0288d1) 12%);
    flex: 1;
    min-width: 0;
}

/* 资料页工具栏按钮 */
.edu-toolbar-btn,
.content-toolbar button,
.sidebar-toolbar button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 18%, var(--border-color));
    border-radius: 9px;
    background: var(--bg-primary, #fff);
    color: var(--text-primary);
    padding: 7px 13px;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    line-height: 1.2;
    cursor: pointer;
    white-space: nowrap;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
    transition: transform 0.14s ease, box-shadow 0.14s ease, background 0.14s ease, border-color 0.14s ease, color 0.14s ease;
}

.edu-toolbar-btn:hover,
.content-toolbar button:hover,
.sidebar-toolbar button:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--primary-color, #0288d1) 42%, var(--border-color));
    background: color-mix(in srgb, var(--primary-color, #0288d1) 6%, var(--bg-primary, #fff));
    box-shadow: 0 4px 12px color-mix(in srgb, var(--primary-color, #0288d1) 12%, transparent);
}

.edu-toolbar-btn:active,
.content-toolbar button:active,
.sidebar-toolbar button:active {
    transform: translateY(0);
}

.toolbar-right .edu-toolbar-btn,
.toolbar-right button {
    min-width: 38px;
    padding: 7px 10px;
    font-weight: 700;
    font-size: 14px;
}

.edu-toolbar-btn--ghost {
    background: transparent;
    color: var(--text-secondary, #64748b);
    border-color: var(--border-color);
}

.edu-toolbar-btn--ghost:hover {
    color: var(--primary-color, #0288d1);
}

.edu-toolbar-btn--accent {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(135deg, var(--primary-color, #0288d1), var(--primary-dark, #0277bd));
    box-shadow: 0 3px 12px color-mix(in srgb, var(--primary-color, #0288d1) 32%, transparent);
}

.edu-toolbar-btn--accent:hover {
    color: #fff;
    filter: brightness(1.05);
    box-shadow: 0 6px 18px color-mix(in srgb, var(--primary-color, #0288d1) 38%, transparent);
}

.edu-toolbar-btn--ai {
    font-size: 12px;
    padding: 6px 11px;
    border-color: color-mix(in srgb, #7c3aed 22%, var(--border-color));
    background: color-mix(in srgb, #7c3aed 6%, var(--bg-primary, #fff));
}

.edu-toolbar-btn--ai:hover {
    border-color: color-mix(in srgb, #7c3aed 45%, var(--border-color));
    background: color-mix(in srgb, #7c3aed 10%, var(--bg-primary, #fff));
    color: #6d28d9;
}

.edu-toolbar-btn--quiz {
    font-size: 12px;
    padding: 6px 11px;
    border-color: color-mix(in srgb, #d97706 24%, var(--border-color));
    background: color-mix(in srgb, #d97706 7%, var(--bg-primary, #fff));
}

.edu-toolbar-btn--quiz:hover {
    border-color: color-mix(in srgb, #d97706 48%, var(--border-color));
    background: color-mix(in srgb, #d97706 12%, var(--bg-primary, #fff));
    color: #b45309;
}

.edu-toolbar-btn.is-on {
    background: color-mix(in srgb, var(--primary-color, #0288d1) 14%, var(--bg-primary, #fff));
    border-color: var(--primary-color, #0288d1);
    color: var(--primary-color, #0288d1);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-color, #0288d1) 20%, transparent);
}

.edu-toolbar-btn.is-active,
.content-toolbar button.is-active {
    background: var(--primary-color, #0288d1);
    border-color: var(--primary-color, #0288d1);
    color: #fff;
}

.sidebar-toolbar input[type="search"] {
    width: 100%;
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 16%, var(--border-color));
    border-radius: 9px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 9px 12px;
    font-size: 13px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.sidebar-toolbar input[type="search"]:focus {
    outline: none;
    border-color: var(--primary-color, #0288d1);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color, #0288d1) 16%, transparent);
}

.toolbar-ai-actions {
    display: flex;
    gap: 6px;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 2px 4px;
    border-radius: 10px;
    background: color-mix(in srgb, var(--primary-color, #0288d1) 4%, var(--bg-primary, #fff));
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 10%, var(--border-color));
}

.toolbar-ai-actions::-webkit-scrollbar {
    display: none;
}

.toolbar-ai-actions .edu-toolbar-btn,
.toolbar-ai-actions button {
    margin: 0;
    flex-shrink: 0;
    padding: 5px 10px;
    font-size: 12px;
}

/* 文档标题浮层：半透明挂件，随滚动隐藏/显示，可图钉固定 */
.edu-doc-title-float {
    position: absolute;
    top: 10px;
    left: 50%;
    z-index: 25;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    max-width: min(92%, 640px);
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: none;
    transition:
        opacity 0.28s ease,
        transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.edu-doc-title-float.is-hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
    pointer-events: none;
}

.edu-doc-title-float.is-pinned.is-hidden {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.edu-doc-title-chip {
    pointer-events: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
    max-width: 100%;
    padding: 5px 12px 5px 5px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--bg-secondary, #fff) 78%, transparent);
    backdrop-filter: blur(14px) saturate(1.15);
    -webkit-backdrop-filter: blur(14px) saturate(1.15);
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 22%, var(--border-color));
    box-shadow:
        0 4px 18px color-mix(in srgb, var(--primary-color, #0288d1) 10%, rgba(15, 23, 42, 0.06)),
        inset 0 1px 0 color-mix(in srgb, var(--text-inverse, #fff) 35%, transparent);
}

.edu-doc-title-float.is-pinned .edu-doc-title-chip {
    border-color: color-mix(in srgb, var(--primary-color, #0288d1) 45%, var(--border-color));
    box-shadow:
        0 6px 22px color-mix(in srgb, var(--primary-color, #0288d1) 18%, rgba(15, 23, 42, 0.08)),
        inset 0 1px 0 color-mix(in srgb, var(--text-inverse, #fff) 40%, transparent);
}

.edu-doc-title-chip__pin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: color-mix(in srgb, var(--primary-color, #0288d1) 8%, var(--bg-primary, #fff));
    color: var(--text-secondary, #64748b);
    cursor: pointer;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.edu-doc-title-chip__pin:hover {
    color: var(--primary-color, #0288d1);
    background: color-mix(in srgb, var(--primary-color, #0288d1) 14%, var(--bg-primary, #fff));
    transform: scale(1.06);
}

.edu-doc-title-chip__pin.is-active {
    color: var(--primary-color, #0288d1);
    background: color-mix(in srgb, var(--primary-color, #0288d1) 20%, var(--bg-primary, #fff));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-color, #0288d1) 35%, transparent);
}

.edu-doc-title-chip__pin.is-active svg {
    transform: rotate(-18deg);
}

.edu-doc-title-chip__pin svg {
    display: block;
    transition: transform 0.2s ease;
}

.edu-doc-title-chip__label {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: min(52vw, 480px);
}

.edu-doc-title-chip__status,
.edu-doc-title-float .lecture-status {
    pointer-events: auto;
    margin: 0;
    width: fit-content;
    max-width: min(88vw, 520px);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 11px !important;
    font-weight: 500;
    line-height: 1.4;
    color: var(--primary-color, #0288d1) !important;
    background: color-mix(in srgb, var(--bg-secondary, #fff) 76%, transparent);
    backdrop-filter: blur(10px);
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 18%, var(--border-color));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.toolbar-center p {
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
    font-size: 14px;
}

.lecture-status {
    font-size: 12px !important;
    color: var(--primary-color, #0288d1) !important;
    white-space: normal !important;
    max-width: 100%;
}

.edu-caption-box {
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    width: min(720px, calc(100% - 40px));
    z-index: 120;
    background: rgba(18, 24, 38, 0.92);
    color: #f5f7fa;
    border-radius: 14px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    padding: 12px 16px 14px;
    animation: edu-caption-in 0.25s ease-out;
}

.edu-caption-box.is-minimized .edu-caption-box__text,
.edu-caption-box.is-minimized .edu-caption-box__anchor {
    display: none;
}

@keyframes edu-caption-in {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.edu-caption-box__bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.72);
}

.edu-caption-box__mode {
    font-weight: 600;
    color: #90caf9;
}

.edu-caption-box__progress {
    margin-left: auto;
}

.edu-caption-box__icon-btn {
    border: none;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    cursor: pointer;
    line-height: 1;
}

.edu-caption-box__text {
    margin: 0;
    font-size: 17px;
    line-height: 1.65;
    letter-spacing: 0.02em;
    max-height: 4.95em;
    overflow-y: auto;
}

.edu-caption-box__anchor {
    margin: 8px 0 0;
    font-size: 12px;
    color: #81c784;
}

.edu-speak-highlight {
    outline: 2px solid var(--primary-color, #0288d1);
    outline-offset: 3px;
    background: rgba(2, 136, 209, 0.14);
    border-radius: 6px;
    scroll-margin-top: 96px;
    scroll-margin-bottom: 120px;
    box-shadow: 0 0 0 1px rgba(2, 136, 209, 0.25);
}

.edu-speak-section-block {
    background: rgba(2, 136, 209, 0.07);
    border-left: 4px solid rgba(2, 136, 209, 0.55);
    padding-left: 10px;
    margin-left: -6px;
    border-radius: 0 6px 6px 0;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.edu-speak-section-block.edu-speak-highlight {
    background: rgba(2, 136, 209, 0.16);
    border-left-color: var(--primary-color, #0288d1);
}

.content-grid {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--edu-side-panel-width, 260px);
    min-height: 0;
    overflow: hidden;
}

.edu-resize-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 28px;
    z-index: 30;
    touch-action: none;
    background: transparent;
}

.edu-resize-handle--east {
    right: -14px;
    cursor: col-resize;
}

.edu-resize-handle--west {
    left: -14px;
    cursor: col-resize;
}

.edu-resize-handle__grip {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 44px;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--border-color) 88%, var(--primary-color) 12%);
    background: color-mix(in srgb, var(--bg-primary) 92%, var(--bg-secondary) 8%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.72;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
    color: var(--text-secondary);
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.edu-resize-handle:hover .edu-resize-handle__grip,
.edu-resize-handle.is-dragging .edu-resize-handle__grip,
.edu-resize-handle:focus-visible .edu-resize-handle__grip {
    opacity: 1;
    border-color: color-mix(in srgb, var(--primary-color) 45%, var(--border-color));
    color: var(--primary-color);
    transform: translate(-50%, -50%) scale(1.06);
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}

.edu-resize-handle:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--primary-color) 35%, transparent);
    outline-offset: 2px;
}

.edu-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translate(-50%, 12px);
    z-index: 1200;
    padding: 10px 16px;
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.92);
    color: #f8fafc;
    font-size: 13px;
    line-height: 1.4;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    max-width: min(92vw, 420px);
    text-align: center;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.22);
}

.edu-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.toolbar-right .edu-toolbar-btn[hidden] {
    display: none;
}

.edu-sidebar--narrow .sidebar-toolbar-head {
    flex-wrap: wrap;
    align-items: flex-start;
}

.edu-sidebar--narrow .browse-breadcrumb {
    font-size: 12px;
}

.edu-sidebar--narrow .browse-item-name {
    white-space: normal;
    word-break: break-word;
}

.edu-layout--main-tight .content-toolbar--compact {
    flex-wrap: wrap;
    align-items: flex-start;
    row-gap: 6px;
}

.edu-layout--main-tight .toolbar-left {
    flex-wrap: wrap;
    row-gap: 6px;
}

.edu-layout--main-tight .toolbar-left .toolbar-ai-actions {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    flex-basis: 100%;
}

@container edu-main (max-width: 760px) {
    .content-toolbar--compact .toolbar-left {
        flex-wrap: wrap;
        row-gap: 6px;
    }

    .toolbar-left .toolbar-ai-actions {
        flex-wrap: wrap;
    }
}

.markdown-panel {
    position: relative;
    min-width: 0;
    overflow-x: auto;
    overflow-y: auto;
    padding: 20px;
    height: 100%;
}

.toc-panel,
.edu-side-panel {
    width: var(--edu-side-panel-width, 260px);
    overflow-y: auto;
    height: 100%;
    flex-shrink: 0;
    position: relative;
    min-width: 0;
}

.fe-page-wrap--edu-fixed {
    min-height: 0;
    padding-bottom: 0;
}

.fe-page-wrap--edu-fixed .fe-footer {
    display: none;
}

@media (max-width: 900px) {
    .edu-sidebar:not(.collapsed) {
        position: absolute;
        z-index: 100;
        height: calc(100vh - var(--fe-navbar-height, 60px));
        box-shadow: 2px 0 12px rgba(0,0,0,0.1);
    }
    .content-grid {
        grid-template-columns: minmax(0, 1fr);
    }
    .toc-panel.hidden,
    .edu-side-panel.hidden {
        display: none;
    }
    .edu-resize-handle {
        display: none !important;
    }
}

.md-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    max-width: min(980px, 100%);
    width: 100%;
    min-width: 0;
    margin: 0 auto;
    padding: 24px 28px;
    line-height: 1.8;
    font-size: 1rem;
    /* 长 URL、英文单词不换行时仍限制在卡片内，避免撑破整页 */
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
}

.md-content h1,
.md-content h2,
.md-content h3 {
    color: var(--primary-color);
}

.md-content h1 {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
}

.md-content h2 {
    margin-top: 28px;
}

.md-content p,
.md-content li {
    color: var(--text-primary);
}

.md-content h1,
.md-content h2,
.md-content h3,
.md-content h4,
.md-content h5,
.md-content h6 {
    overflow-wrap: break-word;
    word-break: break-word;
}

.md-content a {
    overflow-wrap: anywhere;
    word-break: break-word;
}

/* 行内代码里可能出现超长字符串，允许在边界断开 */
.md-content :not(pre) code {
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: pre-wrap;
}

.md-content pre,
.codehilite pre {
    background: #0f172a;
    color: #dbeafe;
    border-radius: 10px;
    padding: 14px;
    max-width: 100%;
    overflow-x: auto;
    white-space: pre;
    word-break: normal;
}

.md-content .codehilite,
.md-content .highlighttable {
    max-width: 100%;
    overflow-x: auto;
}

.md-content pre,
.md-content .codehilite pre,
.md-content .highlighttable pre {
    box-sizing: border-box;
}

.md-content blockquote {
    border-left: 4px solid var(--primary-color);
    background: var(--primary-light);
    margin: 16px 0;
    padding: 10px 14px;
    border-radius: 8px;
}

/*
 * Markdown 正文表格：固定布局 + 单元格断行，避免整表撑破页面。
 * 代码高亮里的 table 在下面单独覆盖为 auto 布局。
 */
.md-content table {
    width: 100%;
    max-width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    margin: 20px 0;
    overflow: hidden;
    border-radius: 8px;
}

.md-content table th,
.md-content table td {
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    text-align: left;
    overflow-wrap: anywhere;
    word-break: break-word;
    white-space: normal;
}

.md-content table th {
    background: var(--primary-light);
}

/*
 * 代码高亮行号使用 table 结构，不能复用普通 Markdown 表格样式。
 * 否则会被 width: 100% 等规则拉伸，导致行号列异常变宽。
 */
.md-content .codehilite table,
.md-content .highlighttable {
    display: table;
    table-layout: auto;
    width: auto;
    margin: 14px 0;
    border-collapse: separate;
    border-spacing: 0;
    border: none;
    border-radius: 10px;
    overflow: hidden;
}

.md-content .codehilite table td,
.md-content .highlighttable td,
.md-content .codehilite table th,
.md-content .highlighttable th {
    border: none;
    padding: 0;
    background: transparent;
}

.md-content .codehilite .linenos,
.md-content .highlighttable .linenos {
    width: 1%;
    min-width: 2.8em;
    padding: 14px 10px 14px 12px;
    text-align: right;
    color: #93a4c3;
    user-select: none;
    border-right: 1px solid rgba(147, 164, 195, 0.3);
}

.md-content .codehilite .linenos pre,
.md-content .highlighttable .linenos pre {
    margin: 0;
    padding: 0;
    background: transparent;
    color: inherit;
}

.md-content .codehilite .code,
.md-content .highlighttable .code {
    padding: 14px;
}

.md-content img {
    max-width: 100%;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.empty-tip {
    color: var(--text-secondary);
}

.toc-panel,
.edu-side-panel {
    border-left: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.edu-side-panel__tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.edu-side-panel__tab {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px 8px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.edu-side-panel__tab.is-active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.edu-side-panel__pane {
    flex: 1;
    min-height: 0;
    overflow: hidden;
    display: none;
    flex-direction: column;
}

.edu-side-panel__pane.is-active {
    display: flex;
}

.edu-side-toc {
    padding: 14px;
    overflow-y: auto;
    flex: 1;
    word-break: break-word;
}

.edu-side-toc a {
    overflow-wrap: anywhere;
}

.edu-side-panel--narrow .edu-side-panel__tab {
    font-size: 12px;
    padding: 8px 4px;
}

.edu-side-panel--narrow .edu-ai-panel__actions {
    flex-direction: column;
    align-items: stretch;
}

.edu-side-panel--narrow .edu-ai-panel__action {
    width: 100%;
    text-align: center;
}

.edu-side-panel--compact .edu-ai-panel__composer {
    flex-direction: column;
    align-items: stretch;
}

.edu-side-panel--compact .edu-ai-panel__send {
    width: 100%;
}

.edu-side-panel--narrow .edu-ai-msg--user {
    max-width: 100%;
}

.edu-ai-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    padding: 10px 12px 12px;
    gap: 8px;
}

.edu-ai-panel__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    flex-shrink: 0;
}

.edu-ai-panel__action {
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 12px;
    cursor: pointer;
}

.edu-ai-panel__action--primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.edu-ai-panel__meta {
    margin: 0;
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.4;
    flex-shrink: 0;
}

.edu-ai-panel__messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px 2px;
}

.edu-ai-panel__empty {
    margin: 0;
    font-size: 12px;
    color: var(--text-secondary);
}

.edu-ai-msg {
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 13px;
    line-height: 1.55;
}

.edu-ai-msg--assistant {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
}

.edu-ai-msg--user {
    background: color-mix(in srgb, var(--primary-color) 12%, var(--bg-primary));
    border: 1px solid color-mix(in srgb, var(--primary-color) 25%, var(--border-color));
    align-self: flex-end;
    max-width: 92%;
}

.edu-ai-msg__label {
    font-size: 10px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.edu-ai-msg__body {
    white-space: pre-wrap;
    word-break: break-word;
}

.edu-ai-panel__composer {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
    align-items: flex-end;
}

.edu-ai-panel__composer textarea {
    flex: 1;
    min-height: 38px;
    max-height: 120px;
    resize: vertical;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 13px;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.edu-ai-panel__send {
    border: none;
    border-radius: 8px;
    background: var(--primary-color);
    color: #fff;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
}

.edu-heading-wrap {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 28px;
    padding-right: 4px;
}

.edu-heading-wrap--h3 {
    margin-top: 18px;
}

.edu-heading-wrap > h2,
.edu-heading-wrap > h3 {
    flex: 1;
    margin: 0;
    min-width: 0;
    padding-right: 120px;
}

.edu-heading-actions {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease;
}

.edu-heading-wrap:hover .edu-heading-actions,
.edu-heading-wrap:focus-within .edu-heading-actions {
    opacity: 1;
    pointer-events: auto;
}

@container edu-main (max-width: 720px) {
    .edu-heading-wrap {
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .edu-heading-wrap > h2,
    .edu-heading-wrap > h3 {
        padding-right: 0;
        flex-basis: 100%;
    }

    .edu-heading-actions {
        position: static;
        transform: none;
        opacity: 1;
        pointer-events: auto;
        margin-top: 4px;
    }
}

.edu-heading-action {
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 2px 8px;
    font-size: 11px;
    cursor: pointer;
    white-space: nowrap;
}

.edu-heading-action:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 块级 AI 精解：hover 显示标签，不遮挡正文 */
.edu-block-ai-host {
    position: relative;
}

.edu-block-ai-host--heading > h1,
.edu-block-ai-host--heading > h4,
.edu-block-ai-host--heading > h5,
.edu-block-ai-host--heading > h6 {
    padding-right: 56px;
}

.edu-heading-actions .edu-block-ai-tag {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    margin: 0;
    box-shadow: none;
    padding: 2px 8px;
    font-size: 11px;
    color: var(--primary-color);
    border-color: color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
    background: color-mix(in srgb, var(--primary-color) 8%, var(--bg-primary));
}

.edu-block-ai-tag {
    position: absolute;
    top: 4px;
    right: 4px;
    z-index: 3;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 1px 7px;
    font-size: 10px;
    line-height: 1.6;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.16s ease, color 0.16s ease, border-color 0.16s ease;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.edu-block-ai-host:hover .edu-block-ai-tag,
.edu-block-ai-host:focus-within .edu-block-ai-tag,
.edu-block-ai-tag:focus-visible {
    opacity: 1;
    pointer-events: auto;
}

.edu-block-ai-tag:hover,
.edu-block-ai-tag:focus-visible {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.edu-block-ai-popover {
    position: fixed;
    z-index: 3400;
    display: flex;
    flex-direction: column;
    max-height: min(70vh, 520px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.18);
    overflow: hidden;
}

.edu-block-ai-popover.hidden {
    display: none;
}

.edu-block-ai-popover__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
    font-size: 12px;
}

.edu-block-ai-popover__close {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
}

.edu-block-ai-popover__body {
    flex: 1;
    min-height: 120px;
    overflow: auto;
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.65;
    white-space: pre-wrap;
    color: var(--text-primary);
}

.edu-block-ai-popover__loading {
    color: var(--text-secondary);
    margin: 0;
}

.edu-block-ai-popover__error {
    color: #cf222e;
    margin: 0;
}

.edu-block-ai-popover__bubble {
    margin-bottom: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    white-space: pre-wrap;
}

.edu-block-ai-popover__bubble--user {
    background: #ddf4ff;
    color: #0550ae;
}

.edu-block-ai-popover__bubble--ai {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
}

.edu-block-ai-popover__form {
    display: flex;
    gap: 6px;
    padding: 8px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.edu-block-ai-popover__form textarea {
    flex: 1;
    min-height: 36px;
    resize: vertical;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 8px;
    font-size: 12px;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.edu-block-ai-popover__send {
    align-self: flex-end;
    border: none;
    border-radius: 8px;
    background: var(--primary-color);
    color: #fff;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
}

.edu-block-ai-popover__send:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .edu-block-ai-tag {
        opacity: 1;
        pointer-events: auto;
    }
}

.toc-panel h3 {
    margin: 4px 0 12px;
    font-size: 16px;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-list li {
    margin: 6px 0;
}

.toc-list a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
}

.toc-list a:hover {
    color: var(--primary-color);
}

.toc-level-h2 {
    margin-left: 12px;
}

.toc-level-h3 {
    margin-left: 24px;
}

.floating-theme-switcher {
    position: fixed;
    right: 24px;
    top: 120px;
    z-index: 3200;
    user-select: none;
    touch-action: none;
}

.floating-theme-btn {
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    border-radius: 999px;
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: grab;
    font-size: 13px;
    font-weight: 600;
}

.floating-theme-btn:active {
    cursor: grabbing;
}

.floating-theme-switcher.dragging .floating-theme-btn {
    opacity: 0.92;
    transform: scale(1.02);
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .toc-panel,
    .edu-side-panel {
        border-left: none;
        border-top: 1px solid var(--border-color);
        max-height: 240px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 54px;
    }

    .edu-sidebar {
        position: fixed;
        left: 0;
        top: 54px;
        bottom: 0;
        width: min(82vw, 320px);
        z-index: 900;
        box-shadow: var(--shadow-lg);
    }

    .edu-sidebar.collapsed {
        width: 0;
    }

    .content-toolbar--compact {
        padding: 4px 8px;
    }

    .toolbar-ai-actions .edu-toolbar-btn,
    .toolbar-ai-actions button {
        padding: 4px 8px;
        font-size: 11px;
    }

    .edu-doc-title-chip__label {
        max-width: min(62vw, 280px);
        font-size: 12px;
    }

    .markdown-panel {
        padding: 12px;
    }

    .md-content {
        padding: 16px;
    }

    .floating-theme-switcher {
        right: 12px;
        top: 96px;
    }
}

/* Mermaid 流程图 / 结构图 / 时序图 */
.flowchart-container {
    margin: 1.25rem 0;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    overflow-x: auto;
}

.flowchart-title {
    margin-bottom: 0.75rem;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.md-content .mermaid,
.md-content pre.mermaid {
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    white-space: pre-wrap;
    font-family: inherit;
}

.md-content .mermaid svg {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.mermaid-error {
    margin: 0;
    padding: 12px;
    border-radius: 8px;
    background: #fff5f5;
    color: #c92a2a;
    font-size: 13px;
    line-height: 1.5;
}

html[data-theme="fashion"] .flowchart-container {
    background: rgba(255, 255, 255, 0.04);
}

html[data-theme="fashion"] .mermaid-error {
    background: rgba(201, 42, 42, 0.15);
    color: #ff8787;
}

/* ── AI 总结弹窗 ── */
.edu-ai-modal[hidden] {
    display: none;
}

.edu-ai-modal {
    position: fixed;
    inset: 0;
    z-index: 4000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.edu-ai-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
}

.edu-ai-modal__panel {
    position: relative;
    width: min(720px, 100%);
    max-height: min(86vh, 900px);
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.edu-ai-modal__panel--narrow {
    width: min(520px, 100%);
}

.edu-ai-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-color);
}

.edu-ai-modal__header h2 {
    margin: 0;
    font-size: 18px;
    color: var(--text-primary);
}

.edu-ai-modal__close {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
}

.edu-ai-modal__meta {
    padding: 8px 18px 0;
    font-size: 12px;
    color: var(--text-tertiary);
    word-break: break-all;
}

.edu-ai-modal__body {
    padding: 16px 18px;
    overflow-y: auto;
    flex: 1;
}

.edu-ai-modal__body--flush {
    padding-top: 8px;
}

.edu-ai-modal__footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
    padding: 14px 18px;
    border-top: 1px solid var(--border-color);
}

.edu-ai-modal__footer button,
.edu-ai-field input {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 8px 12px;
    font-size: 14px;
}

.edu-ai-modal__footer button {
    cursor: pointer;
}

.edu-ai-btn-primary {
    background: var(--primary-color) !important;
    color: var(--text-inverse) !important;
    border-color: var(--primary-color) !important;
}

.edu-ai-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.edu-ai-field input,
.edu-ai-field select {
    width: 100%;
}

.edu-ai-hint {
    margin: 0 0 12px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-tertiary);
}

.edu-ai-hint--transport {
    margin-top: -4px;
    font-size: 12px;
}

.edu-quiz-options {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    background: color-mix(in srgb, var(--primary-color, #0288d1) 5%, var(--bg-primary, #fff));
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 14%, var(--border-color));
}

.edu-quiz-options label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.edu-quiz-count-select {
    flex: 1;
    min-width: 140px;
    padding: 7px 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary, #fff);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
}

.edu-ai-status {
    margin: 8px 0 0;
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.45;
}

.edu-ai-status--info {
    background: var(--primary-light);
    color: var(--text-primary);
}

.edu-ai-status--success {
    background: #ecfdf5;
    color: #047857;
}

.edu-ai-status--error {
    background: #fef2f2;
    color: #b91c1c;
}

.edu-ai-summary-output {
    min-height: 220px;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-primary);
    white-space: pre-wrap;
    line-height: 1.7;
    font-size: 14px;
    color: var(--text-primary);
}

.edu-ai-saved-list {
    list-style: none;
    margin: 0;
    padding: 0 18px 16px;
}

.edu-ai-saved-empty {
    padding: 24px 0;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 14px;
}

.edu-ai-saved-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 10px;
    background: var(--bg-primary);
}

.edu-ai-saved-item__head {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: baseline;
    margin-bottom: 4px;
}

.edu-ai-saved-item__head strong {
    font-size: 14px;
    color: var(--text-primary);
}

.edu-ai-saved-item__head span {
    font-size: 12px;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.edu-ai-saved-item__path {
    margin: 0 0 8px;
    font-size: 12px;
    color: var(--text-tertiary);
    word-break: break-all;
}

.edu-ai-saved-item__body {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    max-height: 120px;
    overflow: hidden;
    white-space: pre-wrap;
}

.edu-ai-saved-item__actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.edu-ai-saved-item__actions button {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 4px 10px;
    font-size: 12px;
    cursor: pointer;
}

html[data-theme="fashion"] .edu-ai-status--success {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
}

html[data-theme="fashion"] .edu-ai-status--error {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
}