/* modern-Layout (layout = "modern"). Eigenständig: lädt weder kit.css noch style.css. */
@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-primary: #009682;
  --color-primary-dark: #007a69;
  --color-accent: #46bea5;
  --color-surface: #f2f7f6;
  --color-hero: #e8f5f2;
  --color-text: #1f2a2b;
  --color-muted: #5a6768;
  --color-border: #d6e0df;
  --color-bg: #ffffff;
  --radius: 10px;
  --container: 1200px;
  --gutter: 1rem;
  --header-h: 4.5rem;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column;
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}
img, svg, video { max-width: 100%; height: auto; }
a { color: var(--color-primary-dark); text-underline-offset: 0.15em; }
a:hover { color: var(--color-primary); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.skip-link {
  position: absolute; left: 0.5rem; top: -4rem; z-index: 100;
  background: var(--color-primary-dark); color: #fff; padding: 0.5rem 1rem; border-radius: 0 0 var(--radius) var(--radius);
}
.skip-link:focus { top: 0; }

/* Header */
.site-header { background: var(--color-bg); border-bottom: 1px solid var(--color-border); position: relative; z-index: 20; }
.site-header__bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1.5rem;
  min-height: var(--header-h); padding-top: 0.5rem; padding-bottom: 0.5rem;
}
.site-header .site-header__bar, .site-footer .site-footer__inner { max-width: 1700px; margin-left: auto; margin-right: auto; padding-left: 1.5rem; padding-right: 1.5rem; }
.brand { display: flex; align-items: center; gap: 1rem; min-width: 0; }
.brand__logo { width: 5.5rem; flex: none; }
@media (min-width: 1025px) {
  /* Desktop: Marke links, Meta-Leiste + Hauptmenü als rechte Spalte auf gleicher Höhe (kein Umbruch unter die Marke) */
  .site-header__bar { flex-wrap: nowrap; }
  .brand { flex: 0 0 auto; gap: 1.25rem; }
  .brand__logo { width: 7.5rem; }
  .brand .brand__title { font-size: 2.2rem; white-space: nowrap; }
  .site-menu { flex: 1 1 0; min-width: 0; }
  .main-nav__list { justify-content: flex-end; }
  .main-nav__list { gap: 0; }
  .main-nav__item > a { padding: 0.6rem 0.65rem; font-size: 1rem; }
  .subnavigation-toggle { padding: 0.4rem 0.15rem; }
}
@media (min-width: 1025px) and (max-width: 1279px) {
  .brand .brand__title { font-size: 1.7rem; }
  .brand { gap: 1rem; }
}
.brand__logo .logo { margin: 0; }
.brand__logo svg { display: block; width: 100%; height: auto; }
.brand__title {
  font-size: 1.35rem; font-weight: 700; color: var(--color-text); text-decoration: none; line-height: 1.2;
  overflow-wrap: anywhere;
}
.brand__title:hover { color: var(--color-primary-dark); }

.site-menu { display: flex; flex-direction: column; align-items: flex-end; gap: 0.5rem; margin-left: auto; }
.meta-nav, .main-nav__list, .site-footer__links, .subnav, .breadcrumb__list, .sitemap {
  list-style: none; margin: 0; padding: 0;
}
.meta-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 0.25rem 1.25rem; }
.meta-tools { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 0.9rem; }
.meta-tools a { display: inline-flex; align-items: center; gap: 0.3rem; color: var(--color-text); text-decoration: none; font-size: 0.85rem; padding: 0.25rem; }
.meta-tools a:hover, .meta-tools a[aria-current="page"] { color: var(--color-primary-dark); }
.meta-tools__icon { width: 1.25rem; height: 1.25rem; }
.meta-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; font-size: 0.85rem; }
.meta-nav a { color: var(--color-muted); text-decoration: none; }
.meta-nav a:hover { color: var(--color-primary-dark); text-decoration: underline; }

.main-nav__list { display: flex; flex-wrap: wrap; gap: 0.25rem 0.25rem; align-items: center; }
.main-nav__item { position: relative; display: flex; align-items: center; }
.main-nav__item > a {
  display: block; padding: 0.6rem 0.8rem; font-weight: 500; color: var(--color-text); text-decoration: none;
  border-bottom: 3px solid transparent;
}
.main-nav__item > a:hover { color: var(--color-primary-dark); }
.main-nav__item.is-active > a, .main-nav__item > a[aria-current="page"] { border-bottom-color: var(--color-primary); font-weight: 600; }
.main-nav__item.is-cta > a {
  background: var(--color-primary); color: #fff; border-radius: var(--radius); border-bottom-color: transparent;
}
.main-nav__item.is-cta > a:hover { background: var(--color-primary-dark); color: #fff; }

.subnavigation-toggle {
  display: none; background: none; border: 0; font: inherit; cursor: pointer; padding: 0.4rem 0.6rem; color: var(--color-text);
}
.subnavigation-enhanced .subnavigation-toggle { display: inline-flex; }
.subnav { display: none; }
[data-subnavigation].is-open > .subnav { display: block; }

/* Menü-Button (nur sichtbar, wenn nav-toggle.js läuft) */
.nav-toggle {
  display: none; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; padding: 0;
  background: var(--color-toggle, #00805f); color: #fff; border: 0; border-radius: 6px; cursor: pointer;
}
.nav-toggle:hover { background: var(--color-toggle-hover, #006b52); }
.nav-toggle-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
/* Suche und Sprache neben dem Menü-Knopf (nur mobil) */
.header-actions { display: flex; align-items: center; gap: 0.25rem; }
.quick-tools { display: none; list-style: none; margin: 0; padding: 0; align-items: center; gap: 0.1rem; }
.quick-tools a { display: inline-flex; align-items: center; justify-content: center; min-width: 2.75rem; min-height: 2.75rem; color: var(--color-text); }
.quick-tools a:hover, .quick-tools a[aria-current="page"] { color: var(--color-primary-dark); }
.nav-toggle-icon, .nav-toggle-icon::before, .nav-toggle-icon::after {
  display: block; width: 1.2rem; height: 2px; background: currentColor; content: ""; position: relative; transition: transform 0.2s;
}
.nav-toggle-icon::before { position: absolute; top: -6px; }
.nav-toggle-icon::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { top: 0; transform: rotate(-45deg); }

/* Desktop */
@media (min-width: 1025px) {
  .subnav {
    position: absolute; top: 100%; left: 0; min-width: 14rem; background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: var(--radius); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12); padding: 0.4rem 0; z-index: 30;
  }
  .subnav a { display: block; padding: 0.5rem 1rem; color: var(--color-text); text-decoration: none; }
  .subnav a:hover { background: var(--color-surface); color: var(--color-primary-dark); }
  [data-subnavigation]:hover > .subnav, [data-subnavigation]:focus-within > .subnav { display: block; }
  .subnavigation-toggle { padding: 0.4rem 0.3rem; }
}

/* Mobil / Tablet */
@media (max-width: 1024px) {
  .nav-enhanced .nav-toggle { display: inline-flex; }
  .quick-tools { display: flex; }
  .site-header .site-header__bar { padding-left: 1rem; padding-right: 1rem; column-gap: 0.5rem; }
  .brand .brand__title { font-size: 1.3rem; }
  .brand { gap: 0.6rem; }
  .quick-tools a { min-width: 2.5rem; }
  .meta-tools__desktop { display: none; }
  .nav-enhanced .site-menu:not(.is-open) { display: none; }
  .site-menu { flex: 1 1 100%; align-items: stretch; }
  .meta-bar { order: 2; justify-content: flex-start; padding-top: 0.5rem; border-top: 1px solid var(--color-border); }
  .meta-tools a { min-width: 2.75rem; min-height: 2.75rem; justify-content: center; }
  .main-nav__list { flex-direction: column; align-items: stretch; }
  .main-nav__item { flex-wrap: wrap; justify-content: space-between; border-bottom: 1px solid var(--color-border); }
  .main-nav__item > a { flex: 1 1 0; min-width: 0; border-bottom: 0; padding: 0.8rem 0.25rem; }
  .main-nav__item.is-active > a, .main-nav__item > a[aria-current="page"] { color: var(--color-primary-dark); border-bottom: 0; }
  .main-nav__item.is-cta { border-bottom: 0; padding: 0.5rem 0; }
  .main-nav__item.is-cta > a { text-align: center; padding: 0.8rem 1rem; }
  .subnavigation-toggle { min-width: 2.75rem; min-height: 2.75rem; justify-content: center; align-items: center; }
  .subnav { flex: 1 1 100%; padding-left: 1rem; }
  .subnav a { display: block; padding: 0.6rem 0.25rem; color: var(--color-text); text-decoration: none; }
  /* ohne JS: Untermenüs ausgeklappt */
  html:not(.subnavigation-enhanced) .subnav { display: block; }
}


/* Hero */
.hero { background: var(--color-hero); overflow: hidden; }
.hero__inner { display: grid; grid-template-columns: 1fr; }
.hero__text { padding: 2rem var(--gutter); }
@media (min-width: 1025px) { .hero__text { padding-left: max(var(--gutter), calc((100vw - var(--container)) / 2 + var(--gutter))) !important; } }
.hero__kicker { margin: 0 0 1rem; font-size: 0.75rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--color-primary-dark); font-weight: 500; }
.hero__title { margin: 0; font-size: clamp(2.5rem, 1.6rem + 4vw, 4.5rem); line-height: 1.05; font-weight: 800; letter-spacing: -0.02em; }
.hero__lead { margin: 0.75rem 0 0; font-size: clamp(1.15rem, 1rem + 0.8vw, 1.6rem); line-height: 1.3; }
.hero__intro { margin: 1.25rem 0 0; max-width: 34rem; color: var(--color-muted); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.75rem 0 0; }
.hero .btn { display: inline-flex; align-items: center; gap: 0.6rem; }
.btn__icon { width: 1.3em; height: 1.3em; }
.btn__chevron { width: 1em; height: 1em; margin-left: 0.4rem; }
.hero .btn--secondary { background: #fff; color: var(--color-text); box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15); }
.hero .btn--secondary:hover { background: var(--color-surface); color: var(--color-text); }

.hero__media { position: relative; order: -1; aspect-ratio: 16 / 9; background: #cfd8d6; }
.hero__slides { position: absolute; inset: 0; }
.hero__slide { position: absolute; inset: 0; margin: 0; opacity: 0; visibility: hidden; transition: opacity 0.8s ease, visibility 0.8s; }
.hero__slide.is-active { opacity: 1; visibility: visible; }
.hero__slide img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; display: block; }
.hero__slide figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 0.5rem 1rem; color: #fff; font-size: 0.85rem; background: linear-gradient(transparent, rgba(0, 0, 0, 0.6)); }
.hero__controls { position: absolute; right: 1rem; bottom: 0.75rem; display: flex; align-items: center; gap: 0.5rem; padding: 0.25rem 0.6rem; background: rgba(0, 0, 0, 0.45); border-radius: 999px; }
.hero__dot { width: 0.7rem; height: 0.7rem; padding: 0; border: 0; border-radius: 50%; background: rgba(255, 255, 255, 0.5); cursor: pointer; }
.hero__dot[aria-current="true"] { background: #fff; }
.hero__toggle { border: 0; background: none; color: #fff; font-size: 0.75rem; cursor: pointer; padding: 0.25rem 0.4rem; }
.hero__dot, .hero__toggle { min-width: 0.7rem; }

@media (min-width: 900px) {
  .hero__inner { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); min-height: 26rem; }
  .hero--text .hero__inner { grid-template-columns: 1fr; min-height: 0; }
  .hero__text { display: flex; flex-direction: column; justify-content: center; padding: 3rem 2rem 3rem var(--gutter); }
  .hero__media { order: 0; aspect-ratio: auto; clip-path: polygon(12% 0, 100% 0, 100% 100%, 0 100%); }
}

/* Kacheln */
.tiles { padding-top: 1.5rem; }
.hero + .tiles { padding-top: 0; background: linear-gradient(var(--color-hero) 0, var(--color-hero) 2rem, transparent 2rem); }
.tiles__list { list-style: none; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin: 0 auto; padding: 1rem var(--gutter) 0; }
.tile { display: flex; }
.tile__link {
  display: flex; align-items: center; gap: 0.85rem; width: 100%; padding: 1rem; background: #fff; color: var(--color-text);
  border-radius: var(--radius); box-shadow: 0 2px 10px rgba(20, 50, 50, 0.1); text-decoration: none;
}
a.tile__link:hover { box-shadow: 0 4px 16px rgba(20, 50, 50, 0.18); color: var(--color-text); }
.tile__icon { flex: none; width: 2.1rem; height: 2.1rem; color: var(--color-primary); }
.tile__body { display: flex; flex-direction: column; min-width: 0; }
.tile__title { font-weight: 700; }
.tile__text { font-size: 0.85rem; line-height: 1.35; color: var(--color-muted); }
@media (min-width: 1100px) { .tiles__list { grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); } }
@media (prefers-reduced-motion: reduce) { .hero__slide { transition: none; } }

/* Breadcrumb */
.breadcrumb { background: var(--color-surface); border-bottom: 1px solid var(--color-border); font-size: 0.875rem; }
.breadcrumb__list { display: flex; flex-wrap: wrap; gap: 0.25rem; padding: 0.6rem var(--gutter); margin: 0 auto; }
.breadcrumb__list li + li::before { content: "›"; margin-right: 0.25rem; color: var(--color-muted); }
.breadcrumb a { color: var(--color-muted); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 600; }

/* Inhalt */
.site-main { min-height: 50vh; }
.site-content { padding-top: 2rem; padding-bottom: 3rem; }
.site-content > * { max-width: 100%; }
.site-content h1, .site-content h2, .site-content h3 { line-height: 1.25; }
.site-content h1 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); margin: 0 0 1rem; }
.site-content h2 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.75rem); margin: 2rem 0 0.75rem; }
.site-content h3 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; }
.site-content p, .site-content li { max-width: 75ch; overflow-wrap: anywhere; }
.site-content table { display: block; overflow-x: auto; border-collapse: collapse; max-width: 100%; }
.site-content th, .site-content td { border: 1px solid var(--color-border); padding: 0.5rem 0.75rem; text-align: left; }
.site-content th { background: var(--color-surface); }
.site-content pre { overflow-x: auto; background: var(--color-surface); padding: 1rem; border-radius: var(--radius); }
.site-content code { font-size: 0.9em; overflow-wrap: anywhere; }
.site-content pre code { overflow-wrap: normal; }
.site-content blockquote { margin: 1rem 0; padding: 0.25rem 1rem; border-left: 4px solid var(--color-accent); background: var(--color-surface); }
.site-content img { border-radius: var(--radius); }

.btn, .site-content a.btn, .site-content a.md-button {
  display: inline-block; background: var(--color-primary); color: #fff; padding: 0.7rem 1.25rem; border-radius: var(--radius);
  font-weight: 600; text-decoration: none;
}
.btn:hover, .site-content a.btn:hover, .site-content a.md-button:hover { background: var(--color-primary-dark); color: #fff; }
.site-content a.md-button { margin: 0 0.5rem 0.5rem 0; }
.btn--secondary, .site-content a.md-button.secondary { background: transparent; color: var(--color-primary-dark); box-shadow: inset 0 0 0 2px var(--color-primary); }
.btn--secondary:hover, .site-content a.md-button.secondary:hover { background: var(--color-surface); color: var(--color-primary-dark); }

.sitemap li { padding: 0.25rem 0; }

/* Footer */
.site-main { flex: 1 0 auto; }
.site-footer { margin-top: auto; flex: none; background: var(--color-text); color: #fff; font-size: 0.9rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 2rem; padding-top: 1.5rem; padding-bottom: 1.5rem; }
.site-footer__copy { margin: 0; }
.site-footer__version { opacity: 0.7; font-size: 0.85em; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.site-footer a { color: #fff; }

@media (min-width: 1025px) { :root { --gutter: 1.5rem; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.search-form { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1.5rem; }
.search-form__input { flex: 1 1 14rem; min-width: 0; font: inherit; padding: 0.7rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius); }
.search-form .btn { border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.search-results { list-style: none; margin: 0; padding: 0; }
.search-result { padding: 1rem 0; border-bottom: 1px solid var(--color-border); }
.search-result__title { font-weight: 700; font-size: 1.1rem; }
.search-result__snippet { margin: 0.25rem 0 0; color: var(--color-muted); }
.search-result mark { background: #ffe58f; color: inherit; padding: 0 0.1em; border-radius: 2px; }
.lang-notice { background: var(--color-surface); border-left: 4px solid var(--color-accent); padding: 0.6rem 1rem; }

/* Kopfzeile: Maße wie auf bibliothek.kit.edu (vermessen, aus mz.css übernommen).
   Dort gilt 1rem = 13,6 px, ab 1720 px Fensterbreite 16 px; Kopfzeile 7,5625rem hoch,
   Innenabstand 1,9375rem oben/unten und 2,1875rem seitlich, Inhalt höchstens 1720 px breit. */
:root { --hr: 13.6px; }
@media (min-width: 1720px) { :root { --hr: 16px; } }
@media (min-width: 1720px) { .brand__logo { width: 133.3px !important; } }
@media (min-width: 1720px) { .site-menu { margin-top: calc(-0.0875 * var(--hr)) !important; } }
@media (min-width: 1025px) {
  .site-header { height: calc(7.5625 * var(--hr)); border-bottom: 0; box-shadow: 0 0 5px rgba(0, 0, 0, 0.3); }
  .site-header .site-header__bar {
    max-width: 1720px; height: 100%; min-height: 0; align-items: flex-start;
    padding: calc(1.9375 * var(--hr)) calc(2.1875 * var(--hr));
  }
  .brand { align-self: flex-start; align-items: center; gap: calc(1.5 * var(--hr)); }
  .brand__logo { width: calc(101.25px + 0.785vw); } /* wie kit.edu: 109 px bei 1025 px bis 115 px bei 1700 px */
  .brand .brand__title { font-size: calc(2.4 * var(--hr)); line-height: 1; }
  .site-menu { gap: calc(0.775 * var(--hr)); margin-top: calc(-0.2 * var(--hr)); }
  .meta-bar { gap: calc(1.4 * var(--hr)); }
  .meta-nav { gap: calc(1.4 * var(--hr)); font-size: var(--hr); line-height: 1.2; }
  .meta-tools a { font-size: var(--hr); padding: 0; }
  .meta-tools__icon { width: calc(1.4 * var(--hr)); height: calc(1.4 * var(--hr)); }
  .main-nav__list { gap: 0 !important; }
  /* Icon-Zeile wie bei KIT: Suche/Sprache oben rechts, Startseiten-Icon in der zweiten Zeile am rechten Rand */
  .site-header .meta-bar { height: calc(1.97 * var(--hr)); }
  .site-header .meta-tools { position: static; line-height: 1; margin-top: calc(0.25 * var(--hr)); }
  .site-header .meta-tools li { display: flex; line-height: 1; }
  .site-header .site-menu { position: relative; }
  .site-header .meta-tools li:last-child:not(.meta-tools__desktop) { position: absolute; right: 0; top: calc(2.62 * var(--hr)); }
  .site-header .main-nav { margin-right: calc(2.4 * var(--hr)); }
  .site-header .main-nav__item { align-items: flex-start; }
  .site-header .subnavigation-toggle { padding: 0 0.15rem; height: calc(1.2 * var(--hr)); display: inline-flex; align-items: center; }
  .main-nav__item > a { padding: 0 calc(0.55 * var(--hr)); font-size: var(--hr); font-weight: 700; line-height: 1.2; padding-bottom: calc(0.35 * var(--hr)); }
  .main-nav__item.is-active > a, .main-nav__item > a[aria-current="page"] { font-weight: 700; }
}
@media (min-width: 1025px) {
  .site-footer .site-footer__inner { max-width: 1720px; padding-left: calc(var(--hr) * 2.1875); padding-right: calc(var(--hr) * 2.1875); }
}