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

:root {
    --color-primary: #354e91;
    --color-primary-dark: #2a3d74;
    --color-primary-light: #009fd5;
    --color-accent: #e3f5fc;
    --color-warm: #e87109;
    --color-text: #353c45;
    --color-text-light: #666666;
    --color-border: #d0d8e0;
    --color-bg: #f5f7fa;
    --color-white: #ffffff;

    --color-surface: #ffffff;
    --color-on-primary: #ffffff;

    --color-hover-bg: var(--color-accent);
    --color-hover-fg: var(--color-primary);
    --color-code-bg: #eef2f6;
    --color-code-border: #dde5ec;
    --color-pre-bg: #f6f8fa;
    --color-pre-border: #e2e8f0;
    --color-row-alt: #f7f9fb;
    --color-quote-from: #fdf6ea;
    --color-mark: #fff3b0;
    --font-main: 'Rubik', 'Helvetica Neue', Arial, Helvetica, sans-serif;
    --nav-width: 155px;
    --nav-width-collapsed: 48px;
    --header-height: 56px;
    --sticky-top: calc(var(--header-height) + 4px);
    color-scheme: light;
}

html[data-theme="dark"] {
    --color-primary: #8ab0f0;
    --color-primary-dark: #b6cdf7;
    --color-primary-light: #45c3f0;

    --color-accent: #31406a;
    --color-warm: #f2913c;
    --color-text: #dde3ea;
    --color-text-light: #9ba6b2;

    --color-border: #5a6675;
    --color-bg: #12171d;
    --color-surface: #1b212a;
    --color-on-primary: #12171d;

    --color-hover-bg: #e8edf5;
    --color-hover-fg: #12171d;
    --color-code-bg: #232b36;
    --color-code-border: #4a5564;
    --color-pre-bg: #161c24;
    --color-pre-border: #4a5564;
    --color-row-alt: #2a323f;
    --color-quote-from: #43371f;
    --color-mark: #6b5610;

    color-scheme: dark;
}

body {
    font-family: var(--font-main);
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text);
    background:
        radial-gradient(circle at 0% 0%, rgba(44,95,138,0.07), transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(232,163,61,0.07), transparent 40%),
        var(--color-bg);
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    min-height: 100vh;

    padding-bottom: var(--footer-height, 2.4rem);
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

.site-header {
    background: var(--color-surface);
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 55%, var(--color-warm) 100%) 1;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem 0.6rem;
    min-height: var(--header-height);

    overflow: hidden;
    transition: min-height 0.2s ease, padding-top 0.2s ease, padding-bottom 0.2s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-toggle-bar {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.header-toggle {
    display: flex;
    align-items: center;
    padding: 0 0.2rem;
    transition: padding-top 0.2s ease, padding-bottom 0.2s ease;
    background: transparent;
    color: var(--color-primary);
    border: none;
    cursor: pointer;
    line-height: 1;
    border-radius: 4px;
}

.header-toggle:hover {
    background: var(--color-accent);
    color: var(--color-primary);
}

.header-toggle-arrow {
    display: flex;
    align-items: center;
}

.header-toggle-icon {
    width: 28px;
    height: 28px;
    display: block;
}

.header-toggle-expand { display: none; }

.header-collapsed .header-inner > :not(.header-toggle-bar),
.header-expanding .header-inner > :not(.header-toggle-bar) { display: none; }

.header-collapsed .header-inner {
    min-height: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.header-collapsed .site-header .header-toggle,
.header-collapsed .site-header.with-sidebar .header-toggle {
    padding-top: 0.1rem;
    padding-bottom: 0.1rem;
}
.header-collapsed .header-toggle-collapse { display: none; }
.header-collapsed .header-toggle-expand { display: block; }

.site-header.with-sidebar .header-toggle-bar {
    flex: 0 0 calc(var(--nav-width) - 1px);
    margin-left: calc(-1rem + 1px);
    transition: flex-basis 0.2s ease;
}

.site-header.with-sidebar .header-toggle {
    width: 100%;
    justify-content: flex-end;
    padding: 0.3rem 0.55rem;
}

.nav-collapsed .site-header.with-sidebar .header-toggle-bar {
    flex-basis: calc(var(--nav-width-collapsed) - 1px);
}

.nav-collapsed .site-header.with-sidebar .header-toggle {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 34px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: -0.01em;
}

.logo-sub {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-text-light);
    line-height: 1.3;
    border-left: 2px solid var(--color-border);
    padding-left: 0.7rem;
    text-decoration: none;
}

.logo-sub:hover {
    color: var(--color-primary);
}

.main-nav {
    flex: 0 0 auto;
}

.main-nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.main-nav a {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.75rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text);

    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
}

.main-nav a:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    text-decoration: none;
}

.main-nav-icon {
    width: 16px;
    height: 16px;
    display: block;
    opacity: 0.7;
}

.main-nav a:hover .main-nav-icon,
.main-nav a.active .main-nav-icon { opacity: 1; }

.main-nav a.active {
    background: var(--color-accent);
    color: var(--color-primary);
    font-weight: 700;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 55%, var(--color-warm) 100%) 1;
    padding-bottom: calc(0.4rem - 3px);
}

.page-wrapper {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0;
    display: flex;
    gap: 0;
    align-items: stretch;
    flex: 1 0 auto;
}

.sidebar-col {
    flex: 0 0 var(--nav-width);
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    transition: flex-basis 0.2s ease;
}

.sidebar-nav {
    background: var(--color-surface);
    border: none;
    border-radius: 0;
    overflow: hidden;
    position: sticky;
    top: var(--sticky-top);
    max-height: calc(100vh - var(--sticky-top) - 0.75rem);
    display: flex;
    flex-direction: column;
}

.nav-scroll {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-header,
.nav-foot {
    flex: 0 0 auto;
}

.nav-header {
    background: var(--color-surface);
    cursor: pointer;
}

.nav-header:hover {
    background: var(--color-accent);
}

.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    padding: 0.3rem 0.55rem;
    background: transparent;
    color: var(--color-primary);
    border: none;
    cursor: pointer;
    line-height: 1;
}

.nav-toggle-arrow {
    display: flex;
    align-items: center;
}

.nav-toggle-icon {
    width: 28px;
    height: 28px;
    display: block;
}

.nav-toggle-expand { display: none; }

.nav-collapsed .sidebar-col {
    flex-basis: var(--nav-width-collapsed);
}

.nav-collapsed .nav-toggle {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

.nav-collapsed .nav-toggle-collapse { display: none; }
.nav-collapsed .nav-toggle-expand { display: block; }

.nav-collapsed .product-label-text,
.nav-expanding .product-label-text {
    display: none;
}

.nav-collapsed .nav-scroll,
.nav-collapsed .nav-foot,
.nav-expanding .nav-scroll,
.nav-expanding .nav-foot {
    display: none;
}

.nav-collapsed .product-label-vert { display: block; }

.nav-collapsed .product-label {
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
}

.nav-collapsed .product-icon {
    order: 1;
}

.product-label {
    background: transparent;
    color: var(--color-primary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    padding: 0.45rem 0.75rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.product-label-text {
    font-size: 0.87rem;
    color: var(--color-primary);
}

.product-label-vert {
    display: none;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    color: var(--color-primary);
    font-size: 0.87rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1;
}

.sidebar-nav nav ul {
    list-style: none;
    padding: 0.2rem 0;
}

.sidebar-nav nav a {
    display: block;
    padding: 0.4rem 0.75rem;
    font-size: 0.9rem;
    color: var(--color-text);
    text-decoration: none;
    transition: background 0.12s, color 0.12s;
}

.sidebar-nav nav a:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    text-decoration: none;
}

.sidebar-nav nav a.active {
    background: var(--color-accent);
    color: var(--color-primary);
    font-weight: 600;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 55%, var(--color-warm) 100%) 1;
    padding-bottom: calc(0.4rem - 3px);
}

.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.page-article {
    position: relative;
    background: var(--color-surface);
    border: none;
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    border-radius: 0;
    flex: 1 1 auto;
}

.page-article-body {
    padding: 1.1rem 1.25rem;
}

.page-article h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 0.75rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-warm) 100%) 1;
}

.page-article h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.4rem;
    padding-left: 0.6rem;
    border-left: 3px solid var(--color-warm);
}

.page-article h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-top: 1rem;
    margin-bottom: 0.3rem;
}

.page-article p {
    margin-bottom: 0.5rem;
}

.page-article ul,
.page-article ol {
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
}

.page-article li {
    margin-bottom: 0.2rem;
}

.page-article blockquote {
    border-left: 4px solid var(--color-warm);
    background: linear-gradient(135deg, var(--color-quote-from) 0%, var(--color-accent) 100%);
    padding: 0.5rem 0.9rem;
    margin: 0.5rem 0;
    border-radius: 0 4px 4px 0;
    font-style: italic;
    color: var(--color-text-light);
}

.page-article blockquote p {
    margin-bottom: 0.15rem;
}

.content-img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1rem auto;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.page-article-body img:not(.content-img) {
    max-width: 100%;
    height: auto;
}

.page-article-body p.img-only {
    text-align: center;
}

.page-article-body p.img-only.align-left {
    text-align: left;
}

.page-article-body p.img-only.align-center {
    text-align: center;
}

.page-article-body p.img-only.align-right {
    text-align: right;
}

.map {
    width: 100%;
    margin: 1rem 0;
    border: 1px solid var(--color-border);
    border-radius: 4px;

    z-index: 0;
}

.map-filter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin: 1rem 0 0.4rem;
    font-size: 0.9rem;
}

.map-filter-field {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.map-filter-select,
.map-filter-text {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-surface);
    color: var(--color-text);
}

.map-filter-text {
    min-width: 12rem;
}

.map-filter-text::placeholder {
    color: var(--color-text-light);
    opacity: 1;
}

.map-filter-reset {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-surface);
    color: var(--color-primary);
    cursor: pointer;
}

.map-filter-reset:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
}

.map-filter-count {
    color: var(--color-text-light);
    font-variant-numeric: tabular-nums;
}

.map-list-title {
    margin: 0.9rem 0 0.2rem;
}

.map-list {
    margin: 0.6rem 0 0;
    padding: 0;
    list-style: none;
    columns: 2;
    column-gap: 1.5rem;
    font-size: 0.9rem;
}

.map-list li {
    break-inside: avoid;
    margin-bottom: 0.3rem;
}

.map-list span {
    color: var(--color-text-light);
}

@media (max-width: 700px) {
    .map-list { columns: 1; }
}

.map-popup-title {
    color: var(--color-primary);
}

.map-popup-subtitle,
.map-popup-line {
    color: var(--color-text);
}

.map .leaflet-container {
    font-family: var(--font-main);
}

html[data-theme="dark"] .map .leaflet-tile-pane {
    filter: brightness(0.82) saturate(0.9);
}

@media print {

    .map .leaflet-control-container { display: none; }
}

.gallery {

    --gallery-width: 200px;

    --gallery-ratio: 4 / 3;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 0.8rem;
    margin: 1rem 0;
}

.gallery figure {
    margin: 0;
    width: var(--gallery-width);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.gallery img {
    display: block;
    width: 100%;
    aspect-ratio: var(--gallery-ratio);

    object-fit: contain;
    padding: 0.25rem;
    box-sizing: border-box;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.gallery .gallery-noimg {
    width: 100%;
    aspect-ratio: var(--gallery-ratio);
    box-sizing: border-box;
    border: 1px dashed var(--color-border);
    border-radius: 4px;
}

.gallery img:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    transform: translateY(-2px);
}

.gallery figcaption {
    font-size: 0.88rem;
    line-height: 1.35;
    text-align: center;
    color: var(--color-text);
}

.page-article-body img:not(.lecture-card-icon) {
    cursor: zoom-in;
}

.page-article-body button img {
    cursor: inherit;
}

.img-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2.5vmin;
    background: rgba(18, 24, 36, 0.88);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    cursor: zoom-out;
}

.img-lightbox.open {
    display: flex;
}

.img-lightbox img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: 4px;
    background: var(--color-surface);
    box-shadow: 0 10px 45px rgba(0, 0, 0, 0.55);
}

.img-lightbox-close {
    position: absolute;
    top: 0.6rem;
    right: 0.9rem;
    width: 2.4rem;
    height: 2.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    cursor: pointer;
}

.img-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

.page-toc {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-surface);
    padding: 0.6rem 1rem 0.8rem;
    margin: 1rem 0 1.6rem;
}

.page-toc-title {
    margin: 0 0 0.4rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-primary);
}

.page-toc ul {
    counter-reset: toc;
    list-style: none;
    margin: 0;
    padding-left: 1.2rem;
}

.page-toc > ul {
    padding-left: 0;
}

.page-toc li {
    counter-increment: toc;
    margin: 0.1rem 0;
}

.page-toc li > a::before {
    content: counters(toc, ".") "\00a0\00a0";
    color: inherit;
    font-variant-numeric: tabular-nums;
}

.page-toc a {
    font-size: 0.9rem;
}

html {
    scroll-padding-top: calc(var(--sticky-top) + 1.25rem);

    scroll-behavior: smooth;
    overflow-y: scroll;
    scrollbar-width: auto;
    scrollbar-color: var(--color-border) transparent;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

html::-webkit-scrollbar { width: 14px; }
html::-webkit-scrollbar-track { background: var(--color-accent); }
html::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border: 3px solid var(--color-accent);
    border-radius: 8px;
}
html::-webkit-scrollbar-thumb:hover { background: var(--color-primary-light); }

.page-article h1 > a[id],
.page-article h2 > a[id],
.page-article h3 > a[id],
.page-article h4 > a[id] {
    outline: none;
}

.heading-num {
    color: inherit;
    font-variant-numeric: tabular-nums;
    margin-right: 0.4em;
}

.page-article code {
    font-family: 'Consolas', 'Menlo', 'Courier New', monospace;
    font-size: 0.86em;
    background: var(--color-code-bg);
    color: var(--color-primary-dark);
    padding: 0.05em 0.35em;
    border: 1px solid var(--color-code-border);
    border-radius: 3px;
    white-space: normal;
    overflow-wrap: break-word;
}

.page-article pre code {
    background: none;
    border: none;
    padding: 0;
    white-space: pre;
    font-size: 0.85rem;
}

.page-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0 1.4rem;
    font-size: 0.9rem;
}

.page-article th,
.page-article td {
    border: 1px solid var(--color-border);
    padding: 0.45rem 0.6rem;
    text-align: left;
    vertical-align: top;
    overflow-wrap: break-word;
}

.page-article thead th {
    background: var(--color-accent);
    color: var(--color-primary);
    font-weight: 700;
}

.page-article tbody tr:nth-child(even) {
    background: var(--color-row-alt);
}

.page-article tbody tr:hover {
    background: var(--color-accent);
}

.bibliography {
    margin: 1rem 0 1.6rem;
    font-size: 0.95rem;
}

.bibliography .csl-entry {
    display: flex;
    gap: 0.6rem;
    margin: 0 0 0.6rem;
    overflow-wrap: anywhere;
}

.bibliography .csl-left-margin {
    flex: 0 0 2.4rem;
    font-variant-numeric: tabular-nums;
}

.bibliography .csl-right-inline {
    flex: 1;
}

.bibliography .csl-entry:target {
    background: var(--color-mark);
}

a.citation {
    text-decoration: none;
}

.citation-missing {
    color: var(--color-warm);
}

.site-footer {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.nav-print {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}

.nav-print:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
    text-decoration: none;
}

.nav-icon {
    width: 15px;
    height: 15px;
    display: block;
    opacity: 0.7;
}

.print-search-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.header-search {
    display: flex;
    align-items: center;
    gap: 0;
}

.header-search input {
    padding: 0.3rem 0.65rem;
    border: 1px solid var(--color-border);
    border-right: none;
    border-radius: 4px 0 0 4px;
    font-size: 0.83rem;
    width: 160px;
    outline: none;
    transition: border-color 0.15s;
}

.header-search:focus-within input,
.header-search:focus-within button {
    border-color: var(--color-primary);
}

.header-search button {
    padding: 0.3rem 0.55rem;
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-left: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    line-height: 0;
    transition: background 0.15s, color 0.15s;
}

.header-search button:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
}

.search-icon {
    width: 16px;
    height: 16px;
    display: block;
    opacity: 0.7;
}

.search-form-main {
    margin-bottom: 1.75rem;
}

.search-input-row {
    display: flex;
    gap: 0;
    max-width: 480px;
}

.search-input-row input {
    flex: 1;
    min-width: 0;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--color-border);
    border-right: none;
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.15s;
}

.search-input-row input:focus {
    border-color: var(--color-primary);
}

.search-input-row button {
    padding: 0.55rem 0.8rem;
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-left: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    line-height: 0;
    transition: background 0.15s, color 0.15s;
}

.search-input-row button:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
}

.search-input-row:focus-within input,
.search-input-row:focus-within button {
    border-color: var(--color-primary);
}

.result-count {
    color: var(--color-text);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.result-list {
    list-style: none;
    padding: 0;
}

.result-item {
    border-bottom: 1px solid var(--color-border);
    padding: 0.65rem 0;
}

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

.result-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.2rem;
}

.result-snippet {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.5;
    margin: 0;
}

mark {
    background: var(--color-mark);
    color: var(--color-text);
    padding: 0 0.1em;
    border-radius: 2px;
    font-weight: 600;
}

.no-results { color: var(--color-text-light); font-style: italic; }

.lang-switch {
    display: inline-flex;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.lang-switch-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 15px;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text-light);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.lang-switch-btn + .lang-switch-btn {
    border-left: 1px solid var(--color-border);
}

.lang-switch-btn:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
    text-decoration: none;
}

:root[data-lang="de"] .lang-switch-btn[data-lang="de"],
:root[data-lang="en"] .lang-switch-btn[data-lang="en"] {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.view-switch {
    display: inline-flex;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.view-switch-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    font-weight: 500;
    background: var(--color-surface);
    color: var(--color-text-light);
    border: none;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.view-switch-icon {
    width: 15px;
    height: 15px;
    display: block;
    opacity: 0.7;
}

.view-switch-label,
.nav-label { display: none; }

.theme-toggle,
.fullscreen-toggle {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.5rem;
    background: transparent;
    color: var(--color-text);
    border: none;
    cursor: pointer;
    line-height: 1;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
}

.theme-toggle:hover,
.fullscreen-toggle:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
}

.theme-toggle-icons,
.fullscreen-toggle-icons {
    display: flex;
    align-items: center;
}

.theme-toggle-icon,
.fullscreen-toggle-icon {
    width: 16px;
    height: 16px;
    display: block;
}

.theme-toggle-sun { display: none; }
html[data-theme="dark"] .theme-toggle-moon { display: none; }
html[data-theme="dark"] .theme-toggle-sun { display: block; }

.fullscreen-toggle-exit { display: none; }
html.is-fullscreen .fullscreen-toggle-enter { display: none; }
html.is-fullscreen .fullscreen-toggle-exit { display: block; }

html.no-fullscreen .fullscreen-toggle { display: none; }

.view-switch-btn + .view-switch-btn {
    border-left: 1px solid var(--color-border);
}

.view-switch-btn:hover {
    background: var(--color-hover-bg);
    color: var(--color-hover-fg);
}

html:not(.mode-slides) .view-switch-btn[data-view="doc"],
html.mode-slides .view-switch-btn[data-view="slides"] {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

html:not(.mode-slides) .view-switch-btn[data-view="doc"] .view-switch-icon,
html.mode-slides .view-switch-btn[data-view="slides"] .view-switch-icon {
    filter: brightness(0) invert(1);
    opacity: 1;
}

.product-icon {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
    color: var(--color-primary);
    opacity: 0.7;
}

.lecture-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0 2rem;
}

.lecture-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-width: 240px;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    text-decoration: none;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.lecture-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 14px rgba(44,95,138,0.15);
    text-decoration: none;
    transform: translateY(-1px);
}

.lecture-card-icon {
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
    color: var(--color-primary);
    opacity: 0.7;
}

.lecture-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary-dark);
}

html.mode-slides .doc-only { display: none !important; }

html:not(.mode-slides) .slides-only { display: none !important; }

html.mode-slides .page-article-body { padding: 0; }

html.mode-slides .slide { display: none; }

html.mode-slides .slide.active {
    display: block;
    padding: 1.75rem 2.25rem 5rem;
    min-height: calc(100vh - var(--header-height) - 2.5rem);
}

html.mode-slides .slide-inner {
    max-width: 900px;
    margin: 0 auto;
}

html.mode-slides .slide.active .heading-num { font-weight: 700; }

.slide-nav { display: none; }

html.mode-slides.has-multi .slide-nav { display: block; }

.slide-nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 200;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-primary);
    font-size: 1.6rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.18);
    transition: background 0.15s, color 0.15s, opacity 0.15s;
}

.slide-nav-icon {
    width: 32px;
    height: 32px;
    display: block;
}

.slide-nav-btn:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.slide-nav-btn:disabled {
    opacity: 0.3;
    cursor: default;
    box-shadow: none;
}

.slide-prev { left: 1.25rem; }
.slide-next { right: 1.25rem; }

.slide-counter {
    position: fixed;
    bottom: 2.85rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-light);
    background: var(--color-surface);
    padding: 0.2rem 0.7rem;
    border-radius: 12px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.12);
}

@media (max-width: 700px) {
    .page-article-body { padding: 1.25rem 1rem; }
}

@media (max-width: 620px) {

    .header-search input {
        display: none;
    }

    .logo-sub {
        display: none;
    }

    .header-search button {
        border: none;
        border-radius: 4px;
        background: transparent;
        padding: 0.4rem 0.5rem;
    }

    .header-search button:hover {
        background: var(--color-accent);
    }

    .header-inner { column-gap: 0.35rem; }
    .print-search-group { gap: 0.25rem; }
    .view-switch-btn,
    .lang-switch-btn { padding: 0.3rem 0.4rem; }
    .nav-print { padding: 0.4rem 0.35rem; }
    .main-nav a { padding: 0.4rem 0.3rem; }
}

html[data-theme="dark"] .logo-img {
    filter: invert(1) hue-rotate(180deg);
}

html[data-theme="dark"] .main-nav-icon,
html[data-theme="dark"] .search-icon,
html[data-theme="dark"] .nav-icon,
html[data-theme="dark"] .view-switch-icon,
html[data-theme="dark"] .product-icon,
html[data-theme="dark"] .lecture-card-icon {
    filter: brightness(0) invert(1);
}

html[data-theme="dark"]:not(.mode-slides) .view-switch-btn[data-view="doc"] .view-switch-icon,
html[data-theme="dark"].mode-slides .view-switch-btn[data-view="slides"] .view-switch-icon {
    filter: none;
    opacity: 1;
}

html[data-theme="dark"] .slide-nav-btn:disabled {
    opacity: 0.5;
}

html[data-theme="dark"] .nav-print:hover .nav-icon,
html[data-theme="dark"] .header-search button:hover .search-icon,
html[data-theme="dark"] .search-input-row button:hover .search-icon,
html[data-theme="dark"] .view-switch-btn:hover .view-switch-icon {
    filter: none;
    opacity: 1;
}

html[data-theme="dark"] .hljs { background: transparent; color: #c9d1d9; }
html[data-theme="dark"] .hljs-doctag,
html[data-theme="dark"] .hljs-keyword,
html[data-theme="dark"] .hljs-meta .hljs-keyword,
html[data-theme="dark"] .hljs-template-tag,
html[data-theme="dark"] .hljs-template-variable,
html[data-theme="dark"] .hljs-type,
html[data-theme="dark"] .hljs-variable.language_ { color: #ff7b72; }
html[data-theme="dark"] .hljs-title,
html[data-theme="dark"] .hljs-title.class_,
html[data-theme="dark"] .hljs-title.class_.inherited__,
html[data-theme="dark"] .hljs-title.function_ { color: #d2a8ff; }
html[data-theme="dark"] .hljs-attr,
html[data-theme="dark"] .hljs-attribute,
html[data-theme="dark"] .hljs-literal,
html[data-theme="dark"] .hljs-meta,
html[data-theme="dark"] .hljs-number,
html[data-theme="dark"] .hljs-operator,
html[data-theme="dark"] .hljs-selector-attr,
html[data-theme="dark"] .hljs-selector-class,
html[data-theme="dark"] .hljs-selector-id,
html[data-theme="dark"] .hljs-variable { color: #79c0ff; }
html[data-theme="dark"] .hljs-meta .hljs-string,
html[data-theme="dark"] .hljs-regexp,
html[data-theme="dark"] .hljs-string { color: #a5d6ff; }
html[data-theme="dark"] .hljs-built_in,
html[data-theme="dark"] .hljs-symbol { color: #ffa657; }
html[data-theme="dark"] .hljs-code,
html[data-theme="dark"] .hljs-comment,
html[data-theme="dark"] .hljs-formula { color: #8b949e; }
html[data-theme="dark"] .hljs-name,
html[data-theme="dark"] .hljs-quote,
html[data-theme="dark"] .hljs-selector-pseudo,
html[data-theme="dark"] .hljs-selector-tag { color: #7ee787; }
html[data-theme="dark"] .hljs-section { color: #79c0ff; }
html[data-theme="dark"] .hljs-bullet { color: #f2cc60; }
html[data-theme="dark"] .hljs-subst,
html[data-theme="dark"] .hljs-emphasis,
html[data-theme="dark"] .hljs-strong { color: #c9d1d9; }

.print-header { display: none; }

@media print {

    html[data-theme="dark"] {
        --color-primary: #354e91;
        --color-primary-dark: #2a3d74;
        --color-primary-light: #009fd5;
        --color-accent: #e3f5fc;
        --color-warm: #e87109;
        --color-text: #353c45;
        --color-text-light: #666666;
        --color-border: #d0d8e0;
        --color-bg: #f5f7fa;
        --color-surface: #ffffff;
        --color-on-primary: #ffffff;
        --color-hover-bg: #e3f5fc;
        --color-hover-fg: #354e91;
        --color-code-bg: #eef2f6;
        --color-code-border: #dde5ec;
        --color-pre-bg: #f6f8fa;
        --color-pre-border: #e2e8f0;
        --color-row-alt: #f7f9fb;
        --color-quote-from: #fdf6ea;
        --color-mark: #fff3b0;
        color-scheme: light;
    }
    html[data-theme="dark"] .logo-img,
    html[data-theme="dark"] .main-nav-icon,
    html[data-theme="dark"] .search-icon,
    html[data-theme="dark"] .nav-icon,
    html[data-theme="dark"] .view-switch-icon,
    html[data-theme="dark"] .product-icon,
    html[data-theme="dark"] .lecture-card-icon { filter: none; }
    html[data-theme="dark"] .hljs { background: #fff; color: #24292e; }

    @page {
        size: A4 portrait;

        margin: 1.5cm 2cm 1.7cm;
    }

    .site-header,
    .sidebar-col,
    .sidebar-nav,
    .site-footer,
    .nav-print {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
        font-size: 10pt;
        line-height: 1.4;
    }

    .page-wrapper {
        display: block;
        margin: 0;
        padding: 0;
    }

    .main-content { width: 100%; }

    .print-header {
        display: none;
        align-items: center;
        gap: 0.4cm;
        margin-bottom: 0.5cm;
        padding-bottom: 0.1cm;
        border-bottom: 0.5pt solid #000;
    }

    .print-logo-text {
        font-size: 10pt;
        font-weight: 700;
        color: #000;
    }

    .page-article { border: none; box-shadow: none; }
    .page-article-body { padding: 0; }

    .page-article h1 {
        font-size: 15pt;
        color: #000;
        border-bottom: 1pt solid #000;
        margin-bottom: 0.4cm;
    }

    .page-article h2 {
        font-size: 12pt;
        color: #000;
        margin-top: 0.5cm;
        padding-left: 0;
        border-left: none;
    }

    .page-article h3 {
        font-size: 10.5pt;
        color: #000;
        margin-top: 0.35cm;
    }

    .page-article a { color: #000; text-decoration: none; }
    .page-article a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #555;
    }

    h1, h2, h3 { page-break-after: avoid; }
    li, blockquote { page-break-inside: avoid; }

    .content-img {
        max-width: 100%;
        border: 0.5pt solid #ccc;
    }

    .img-lightbox { display: none !important; }

    .gallery figure { page-break-inside: avoid; break-inside: avoid; }
    .gallery img { border: 0.5pt solid #ccc; }

    html:not(.mode-slides) .slide {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    html:not(.mode-slides) .slide + .slide { margin-top: 0.6cm; }
}

.slide-print-footer { display: none; }

.doc-print-footer { display: none; }

@media print {
    html:not(.mode-slides) .doc-print-footer {
        display: flex;
        position: fixed;
        left: 0;
        right: 0;
        top: auto;
        bottom: 0;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
        font-size: 9pt;
        color: #555;
        background: #fff;
        border-top: 0.5pt solid #bbb;
        padding-top: 2mm;
    }
}

@media print {
    html.mode-slides body {
        font-size: 18pt;
        line-height: 1.45;
        padding-bottom: 0;
    }

    html.mode-slides .page-wrapper {
        max-width: none;
        width: 100%;
    }

    html.mode-slides .slide-nav,
    html.mode-slides .slide-counter { display: none !important; }

    html.mode-slides .slide {
        display: flex !important;
        flex-direction: column;

        height: 186mm;
        overflow: hidden;
        padding: 0;
        box-sizing: border-box;
    }

    html.mode-slides .slide + .slide {
        break-before: page;
        page-break-before: always;
    }

    html.mode-slides .slide-inner {
        flex: 1;
        min-height: 0;
        overflow: hidden;
        max-width: none;
        margin: 0;
        padding: 0.6rem 0.5rem 0.4rem;
        box-sizing: border-box;
    }

    html.mode-slides .slide-inner h1 {
        font-size: 30pt;
        line-height: 1.2;
        margin-bottom: 0.5rem;
        border-bottom: 1pt solid #000;
        padding-bottom: 0.25rem;
    }

    html.mode-slides .slide-inner h2 {
        font-size: 22pt;
        line-height: 1.25;
        margin-top: 0.6rem;
        margin-bottom: 0.3rem;
        padding-left: 0;
        border-left: none;
    }

    html.mode-slides .slide-inner h3 {
        font-size: 18pt;
        margin-top: 0.4rem;
    }

    html.mode-slides .slide-inner p,
    html.mode-slides .slide-inner li {
        font-size: 18pt;
        line-height: 1.45;
        margin-bottom: 0.3rem;
    }

    html.mode-slides .slide-inner ul,
    html.mode-slides .slide-inner ol {
        margin: 0.2rem 0 0.3rem 1.4em;
    }

    html.mode-slides .slide-inner code {
        font-size: 15pt;
    }

    html.mode-slides .slide-inner pre code {
        font-size: 13pt;
    }

    html.mode-slides .slide-inner table {
        font-size: 15pt;
    }

    html.mode-slides .slide-inner img {
        display: block;
        max-width: 100%;
        max-height: 130mm;
        height: auto;
        margin: 0.4rem auto;
    }

    html.mode-slides .slide-print-footer {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-shrink: 0;
        font-size: 9pt;
        color: #555;
        border-top: 0.5pt solid #bbb;
        padding-top: 2mm;
        margin-top: 2mm;
    }

    html.mode-slides .slide-footer-num {
        font-weight: 600;
        color: #333;
    }

    html.mode-slides .print-header { display: none; }
}

.math-block {
    margin: 1.1em 0;
    text-align: center;
    overflow-x: auto;
    overflow-y: hidden;
}
mjx-container[display="true"] {
    margin: 1.1em 0 !important;
    overflow-x: auto;
    overflow-y: hidden;
}

.page-article pre {
    background: var(--color-pre-bg);
    border: 1px solid var(--color-pre-border);
    border-radius: 6px;
    padding: 0.85em 1.05em;
    overflow-x: auto;
}
.page-article pre code,
.page-article pre code.hljs {
    background: transparent;
    padding: 0;
}