/* Kursmaterial – one stylesheet for all pages. Light and dark mode via tokens; no web fonts, no images except
   small SVG icons. Topic colour: build.py sets --t on <main> (and on list items); --ton is the readable tone of it. */
:root {
  --bg: #f5f6fb;
  --card: #ffffff;
  --fg: #161a2e;
  --muted: #5b6277;
  --line: #e3e6ef;
  --control: #a3a9ba;
  --accent: #4338ca;
  --accent-soft: #eef0ff;
  --brand: linear-gradient(135deg, #4338ca 0%, #7c3aed 60%, #db2777 130%);
  --t: #4338ca;
  --erg-bg: #fff8e8;
  --erg-line: #d99a00;
  --mark: #fde68a;
  --info-bg: #eef5ff;
  --info-line: #2563eb;
  --warn-bg: #fff1f0;
  --warn-line: #d92d20;
  --ok: #15803d;
  --notiz-bg: #f5f0ff;
  --notiz-line: #6d28d9;
  --ink: #12152b;
  --shadow: 0 1px 2px rgb(22 26 46 / 0.05), 0 6px 20px rgb(22 26 46 / 0.06);
  --shadow-hoch: 0 2px 4px rgb(22 26 46 / 0.06), 0 14px 30px rgb(22 26 46 / 0.11);
  --r: 16px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1020;
    --card: #161a2e;
    --fg: #e8eaf4;
    --muted: #a2a8bd;
    --line: #272c47;
    --control: #4b5273;
    --accent: #a5b4fc;
    --accent-soft: #1e2244;
    --t: #6366f1;
    --erg-bg: #2a2312;
    --erg-line: #e0aa2a;
    --mark: #6b5a12;
    --info-bg: #13213b;
    --info-line: #6ea8ff;
    --warn-bg: #2f1716;
    --warn-line: #ff7b6e;
    --ok: #6fd08c;
    --notiz-bg: #231a38;
    --notiz-line: #c4a6ff;
    --ink: #07091a;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 6px 20px rgb(0 0 0 / 0.25);
    --shadow-hoch: 0 2px 4px rgb(0 0 0 / 0.35), 0 14px 30px rgb(0 0 0 / 0.35);
    color-scheme: dark;
  }
}

/* topic tone: readable text colour and soft background derived from --t */
main, .liste li, .badge.thema, .bereich, .themen button { --ton: var(--t); --ton-soft: var(--accent-soft); --ton-rand: var(--line); }
@supports (color: color-mix(in srgb, red 50%, blue)) {
  main, .liste li, .badge.thema, .bereich, .themen button {
    --ton-soft: color-mix(in srgb, var(--t) 11%, var(--card));
    --ton-rand: color-mix(in srgb, var(--t) 30%, var(--line));
  }
  @media (prefers-color-scheme: dark) {
    main, .liste li, .badge.thema, .bereich, .themen button {
      --ton: color-mix(in srgb, var(--t) 50%, #fff);
      --ton-soft: color-mix(in srgb, var(--t) 22%, var(--card));
      --ton-rand: color-mix(in srgb, var(--t) 45%, var(--line));
    }
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  color: var(--fg);
  font: 17px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(55rem 26rem at 105% -8%, rgb(124 58 237 / 0.09), transparent 65%),
    radial-gradient(45rem 24rem at -10% -5%, rgb(67 56 202 / 0.08), transparent 65%),
    var(--bg);
  background-repeat: no-repeat;
}
a { color: var(--accent); text-underline-offset: 0.18em; }
main a { color: var(--ton, var(--accent)); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
::selection { background: var(--mark); color: inherit; }

/* Header: logo mark + navigation pills */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  padding: 0.65rem max(1rem, calc((100% - 44rem) / 2));
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 800; font-size: 1.05rem; letter-spacing: -0.01em; text-decoration: none; color: var(--fg); }
.brand::before {
  content: "K";
  display: inline-grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.6rem;
  background: var(--brand);
  color: #fff;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px -4px rgb(67 56 202 / 0.6);
}
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.25rem; }
.site-header nav a { text-decoration: none; color: var(--muted); font-weight: 600; font-size: 0.95rem; padding: 0.32rem 0.7rem; border-radius: 999px; }
@media (max-width: 26rem) {
  .brand { font-size: 0.98rem; }
  .brand::before { width: 1.7rem; height: 1.7rem; }
  .site-header nav { gap: 0; }
  .site-header nav a { font-size: 0.88rem; padding: 0.3rem 0.5rem; }
}
.site-header nav a:hover { background: var(--accent-soft); color: var(--accent); }
.site-header nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }

main { max-width: 46rem; margin: 0 auto; padding: 1.4rem 1rem 3rem; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.35rem); line-height: 1.15; letter-spacing: -0.025em; font-weight: 800; margin: 0.3rem 0 0.5rem; }
h2 { font-size: 1.35rem; line-height: 1.3; letter-spacing: -0.015em; font-weight: 750; color: var(--ton, var(--accent)); margin: 2.4rem 0 0.6rem; }
h3 { font-size: 1.1rem; letter-spacing: -0.01em; margin: 1.7rem 0 0.5rem; }
.crumbs, .meta { color: var(--muted); font-size: 0.92rem; margin: 0; }
.crumbs a { color: var(--muted); }
.crumbs a:last-child { display: inline-block; text-decoration: none; font-weight: 700; font-size: 0.8rem; padding: 0.1rem 0.6rem; border-radius: 999px; background: var(--ton-soft); color: var(--ton); }
.meta { margin-bottom: 1.2rem; }
.lead { font-size: 1.1rem; color: var(--muted); margin: 0.4rem 0 1rem; }
.untertitel { font-size: 1.12rem; color: var(--muted); margin: 0 0 0.3rem; }
.hinweis { color: var(--muted); font-size: 0.92rem; }

/* Page head on list pages: a soft panel in the page colour */
.kopf {
  position: relative;
  overflow: hidden;
  padding: 1.3rem 1.3rem 0.4rem;
  margin: 0.2rem 0 1.3rem;
  border-radius: 20px;
  border: 1px solid var(--ton-rand);
  background: linear-gradient(135deg, var(--ton-soft), var(--card) 80%);
}
.kopf::after { content: ""; position: absolute; right: -2.5rem; top: -2.5rem; width: 9rem; height: 9rem; border-radius: 50%; background: var(--t); opacity: 0.1; }
.kopf h1 { margin-top: 0; }
.kopf > * { position: relative; z-index: 1; }

/* Start page: gradient hero with search */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  border-radius: 24px;
  padding: 1.8rem 1.3rem 1.5rem;
  margin: 0.3rem 0 1.3rem;
  background:
    radial-gradient(18rem 12rem at 100% 0%, rgb(255 255 255 / 0.18), transparent 70%),
    radial-gradient(14rem 10rem at 0% 110%, rgb(253 230 138 / 0.22), transparent 70%),
    var(--brand);
  box-shadow: 0 22px 44px -22px rgb(67 56 202 / 0.7);
}
.hero h1 { color: #fff; font-size: clamp(2.1rem, 1.3rem + 4vw, 3rem); margin: 0 0 0.4rem; }
.hero .lead { color: rgb(255 255 255 / 0.92); max-width: 28rem; }
.hero .startsuche { margin: 1.1rem 0 0.2rem; max-width: 30rem; }
.hero .search { border: 0; box-shadow: 0 8px 24px -10px rgb(0 0 0 / 0.45); background-color: #fff; color: #161a2e; }
@media (min-width: 40rem) {
  .hero { padding: 2.6rem 15rem 2.2rem 2.2rem; }
  .hero::after { content: ""; position: absolute; right: 0.6rem; bottom: 50%; transform: translateY(50%); width: 14rem; height: 11.7rem; background: url(hero.svg) center / contain no-repeat; }
}

.bereiche { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 0.9rem; margin-bottom: 0.6rem; }
.bereich {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  column-gap: 0.95rem;
  align-items: start;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--card);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--fg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.bereich .icon { grid-row: 1 / span 3; display: grid; place-items: center; width: 3rem; height: 3rem; border-radius: 14px; background: var(--ton-soft); color: var(--ton); }
.bereich .icon svg { width: 1.6rem; height: 1.6rem; }
.bereich strong { font-size: 1.18rem; letter-spacing: -0.01em; color: var(--fg); }
.bereich span:not(.icon) { color: var(--muted); font-size: 0.95rem; line-height: 1.45; }
.bereich small { justify-self: start; margin-top: 0.45rem; font-weight: 700; font-size: 0.8rem; padding: 0.1rem 0.6rem; border-radius: 999px; background: var(--ton-soft); color: var(--ton); }
.bereich:hover { transform: translateY(-2px); box-shadow: var(--shadow-hoch); border-color: var(--ton-rand); }

/* Search field (start page and article list) */
.search {
  width: 100%;
  font: inherit;
  font-size: 1.05rem;
  padding: 0.75rem 0.9rem 0.75rem 2.7rem;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--fg);
  box-shadow: var(--shadow);
  position: relative;
}
.startsuche, .suchfeld { position: relative; }
.startsuche::before, .suchfeld::before {
  content: "";
  position: absolute;
  left: 0.9rem;
  top: 50%;
  width: 1.2rem;
  height: 1.2rem;
  transform: translateY(-50%);
  z-index: 1;
  background: var(--muted);
  -webkit-mask: url(icon-suche.svg) center / contain no-repeat;
  mask: url(icon-suche.svg) center / contain no-repeat;
}
.hero .startsuche::before { background: #5b6277; }
.search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

/* Table of contents */
.toc details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 0.55rem 1rem; box-shadow: var(--shadow); }
.toc summary { cursor: pointer; font-weight: 700; }
.toc ul { margin: 0.4rem 0 0.2rem; padding-left: 1.2rem; }

/* Boxes: soft colour, rounded, small icon before the first line */
.kurz, .ergaenzung, .info, .achtung, .notiz {
  position: relative;
  border: 1px solid;
  border-radius: var(--r);
  padding: 0.95rem 1.1rem;
  margin: 1.3rem 0;
}
.kurz::after, .ergaenzung::after, .info::after, .achtung::after, .notiz::after {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 1.05rem;
  width: 1.35rem;
  height: 1.35rem;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  background: var(--box-farbe);
}
.kurz > :first-child, .info > :first-child, .achtung > :first-child { margin-top: 0; padding-left: 1.9rem; min-height: 1.5rem; }
.kurz > :last-child, .ergaenzung > :last-child, .info > :last-child, .achtung > :last-child, .notiz > :last-child { margin-bottom: 0; }
.kurz ul, .ergaenzung ul, .info ul, .info ol, .notiz ol, .notiz ul { padding-left: 1.3rem; }
.kurz { --icon: url(icon-kurz.svg); --box-farbe: var(--ton); background: linear-gradient(135deg, var(--ton-soft), var(--card) 130%); border-color: var(--ton-rand); box-shadow: var(--shadow); }
.info { --icon: url(icon-info.svg); --box-farbe: var(--info-line); background: var(--info-bg); border-color: color-mix(in srgb, var(--info-line) 25%, var(--line)); }
.achtung { --icon: url(icon-achtung.svg); --box-farbe: var(--warn-line); background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn-line) 30%, var(--line)); }
.ergaenzung { --icon: url(icon-plus.svg); --box-farbe: var(--erg-line); background: var(--erg-bg); border-color: color-mix(in srgb, var(--erg-line) 30%, var(--line)); }
.notiz { --icon: url(icon-notiz.svg); --box-farbe: var(--notiz-line); background: var(--notiz-bg); border-color: color-mix(in srgb, var(--notiz-line) 35%, var(--line)); }
.ergaenzung::before, .notiz::before {
  display: block;
  padding-left: 1.9rem;
  min-height: 1.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  line-height: 1.5rem;
  margin-bottom: 0.25rem;
}
.ergaenzung::before { content: "Ergänzung"; color: var(--muted); }
.notiz::before { content: "Für die Lehrkraft"; color: var(--notiz-line); }
.notiz li { margin: 0.25rem 0; }
.lehrer-banner { background: var(--notiz-bg); border: 1px solid var(--notiz-line); border-radius: 12px; padding: 0.5rem 0.8rem; font-size: 0.9rem; margin: 0 0 1rem; }

/* Tables: rounded card, tinted head */
table { width: 100%; border-collapse: separate; border-spacing: 0; margin: 1rem 0; font-size: 0.96rem; background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
th, td { padding: 0.55rem 0.7rem; vertical-align: top; text-align: left; border-bottom: 1px solid var(--line); hyphens: auto; hyphenate-limit-chars: 12 5 5; }
th + th, td + td { border-left: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { background: var(--ton-soft); color: var(--fg); font-weight: 700; }
td[style*="right"], th[style*="right"] { white-space: nowrap; }

/* Glossary */
dl { margin: 0.5rem 0; }
dt { font-weight: 750; margin-top: 1rem; color: var(--fg); }
dd { margin: 0.2rem 0 0; padding: 0.1rem 0 0.1rem 0.9rem; border-left: 3px solid var(--ton-rand); }

/* Questions with hidden answers: cards with a +/− sign */
main details:not(.toc details):not(.tag):not(.serie details) {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.65rem 1rem;
  margin: 0.55rem 0;
  box-shadow: var(--shadow);
}
main details > summary { cursor: pointer; font-weight: 650; }
main details:not(.toc details):not(.tag):not(.serie details):not(.einzeln) > summary { list-style: none; display: flex; gap: 0.8rem; justify-content: space-between; }
main details:not(.toc details):not(.tag):not(.serie details):not(.einzeln) > summary::-webkit-details-marker { display: none; }
main details:not(.toc details):not(.tag):not(.serie details):not(.einzeln) > summary::after {
  content: "+";
  flex: none;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: var(--ton-soft);
  color: var(--ton);
  font-weight: 800;
  line-height: 1;
}
main details[open]:not(.toc details):not(.tag):not(.serie details):not(.einzeln) > summary::after { content: "−"; }
main details[open] > summary { margin-bottom: 0.5rem; color: var(--ton, var(--accent)); }
main details > :last-child { margin-bottom: 0.1rem; }

/* Keyword chips, topic filter */
.chips { list-style: none; padding: 0; margin: 0.5rem 0; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chips a, .chips button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--fg);
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.chips a:hover, .chips button:hover { border-color: var(--control); }
.themen button[style]::before { content: ""; width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--t); }
.chips button[aria-pressed="true"] { background: var(--fg); border-color: var(--fg); color: var(--bg); }
.quelle { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.88rem; }

/* Lists of articles: one card, rows with a dot in the topic colour */
.count { color: var(--muted); font-size: 0.9rem; margin: 0.7rem 0; }
.liste { list-style: none; padding: 0.15rem 1rem; margin: 0.5rem 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); }
.liste li { position: relative; padding: 0.8rem 0 0.8rem 1.2rem; border-bottom: 1px solid var(--line); }
.liste li:last-child { border-bottom: 0; }
.liste li::before { content: ""; position: absolute; left: 0; top: 1.28rem; width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--ton); }
.liste li a { font-weight: 650; color: var(--fg); text-decoration: none; }
.liste li a:hover { color: var(--ton); text-decoration: underline; }
.snippet { color: var(--muted); font-size: 0.92rem; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 2px; }
.empty { color: var(--muted); font-style: italic; }
.badge { display: inline-block; font-size: 0.74rem; font-weight: 700; padding: 0.08rem 0.55rem; border-radius: 999px; background: var(--line); color: var(--muted); white-space: nowrap; vertical-align: 0.1em; }
.badge.thema { background: var(--ton-soft); color: var(--ton); }

/* Article list: foldable class days */
h2.tag { font-size: 1rem; color: var(--muted); margin: 1.8rem 0 0.2rem; text-transform: none; }
details.tag { margin: 0.3rem 0 0.9rem; }
details.tag > summary { cursor: pointer; font-weight: 800; font-size: 0.95rem; padding: 0.5rem 0.2rem; color: var(--fg); }
details.tag > summary .zahl { color: var(--muted); font-weight: 500; }

/* Cards (lesson list, search results) */
.card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 1.05rem 1.15rem; margin: 0.9rem 0; box-shadow: var(--shadow); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hoch); }
.card h2 { font-size: 1.18rem; margin: 0.1rem 0 0.25rem; color: var(--fg); }
.card h2 a { text-decoration: none; color: var(--fg); }
.card h2 a::after { content: ""; position: absolute; inset: 0; }
.card p { margin: 0.3rem 0; }
.lektion-karte { display: grid; grid-template-columns: 3.1rem minmax(0, 1fr); gap: 1rem; align-items: start; }
.lektion-karte .nummer { margin: 0.15rem 0 0; display: grid; place-items: center; width: 3.1rem; height: 3.1rem; border-radius: 14px; background: var(--brand); color: #fff; font-size: 1.4rem; font-weight: 800; box-shadow: 0 8px 18px -8px rgb(67 56 202 / 0.7); }
.lektion-karte .meta { margin: 0; font-size: 0.85rem; }

/* General */
img { max-width: 100%; height: auto; }
.inhalt img { border: 1px solid var(--line); border-radius: 12px; display: block; margin: 1rem 0 0.3rem; }
code { font-size: 0.88em; background: var(--accent-soft); padding: 0.1rem 0.35rem; border-radius: 6px; overflow-wrap: anywhere; }

/* Pictures: own square drawings (400 x 400). On phones in the text flow, on wide screens beside the text. */
.bild { margin: 1.3rem auto; max-width: 25rem; }
.bild img, .inhalt .bild img { display: block; width: 100%; height: auto; margin: 0; border: 1px solid var(--line); border-radius: var(--r); background: #fff; box-shadow: var(--shadow); }
@media (min-width: 50rem) {
  .bild { float: right; width: 21rem; margin: 0.3rem 0 1rem 1.4rem; }
  main h2 { clear: both; }
  .bild:has(+ table) { float: none; margin: 1.3rem auto; }
  .kurz, .ergaenzung, .info, .achtung, .notiz, .schritte ol, .prinzip, main details { display: flow-root; }
}

/* Footer: dark band across the page */
.site-footer {
  margin-top: 3rem;
  padding: 1.6rem max(1rem, calc((100% - 44rem) / 2)) 2.2rem;
  background: var(--ink);
  color: #b9bed4;
  font-size: 0.9rem;
  line-height: 2;
}
.site-footer a { color: #fff; text-decoration: none; font-weight: 600; }
.site-footer a:hover { text-decoration: underline; }
.site-footer a:first-child { font-weight: 800; }

/* Previous / next */
.blaettern { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.8rem; margin-top: 2.5rem; }
@media (max-width: 34rem) { .blaettern { grid-template-columns: minmax(0, 1fr); } .blaettern .weiter { text-align: left; } }
.blaettern a { display: block; padding: 0.8rem 1rem; border: 1px solid var(--line); border-radius: 14px; background: var(--card); text-decoration: none; font-weight: 650; box-shadow: var(--shadow); transition: transform 0.15s ease, box-shadow 0.15s ease; }
.blaettern a:hover { transform: translateY(-2px); box-shadow: var(--shadow-hoch); }
.blaettern small { display: block; color: var(--muted); font-weight: 500; }
.blaettern .weiter { text-align: right; }

/* Lessons */
.prinzip { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 0.5rem; align-items: stretch; margin: 1.3rem 0; }
.prinzip > div:not(.zeichen) { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 0.7rem 0.8rem; font-size: 0.9rem; box-shadow: var(--shadow); }
.prinzip strong { display: block; color: var(--ton); font-size: 1rem; }
.prinzip em { display: block; color: var(--muted); font-style: normal; font-size: 0.82rem; margin-top: 0.2rem; }
.prinzip .zeichen { align-self: center; font-size: 1.5rem; font-weight: 800; color: var(--ton); }
@media (max-width: 34rem) {
  .prinzip { grid-template-columns: 1fr; }
  .prinzip .zeichen { justify-self: center; line-height: 1; }
}
.ziele { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 0.2rem 1.1rem 0.4rem; box-shadow: var(--shadow); }
.ziele h2 { margin-top: 0.9rem; }
.ziele ul { padding-left: 0; list-style: none; }
.ziele li { position: relative; padding-left: 1.8rem; margin: 0.35rem 0; }
.ziele li::before { content: "✓"; position: absolute; left: 0; top: 0.12rem; width: 1.25rem; height: 1.25rem; border-radius: 50%; display: grid; place-items: center; font-size: 0.75rem; font-weight: 800; background: var(--ton-soft); color: var(--ton); }
.downloads, .lehrkraft { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 0.2rem 1.1rem 0.7rem; margin: 1.5rem 0; box-shadow: var(--shadow); }
.downloads h2, .lehrkraft h2 { margin-top: 0.9rem; }
.btn, .quiz-neu {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  padding: 0.65rem 1.1rem;
  border: 0;
  border-radius: 12px;
  margin: 0.2rem 0 0.6rem;
  box-shadow: 0 10px 22px -12px rgb(67 56 202 / 0.8);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
main a.btn { color: #fff; }
.btn:hover, .quiz-neu:hover { transform: translateY(-1px); box-shadow: 0 14px 26px -12px rgb(67 56 202 / 0.9); }
.btn span { font-weight: 500; opacity: 0.9; font-size: 0.9rem; }
.dateiliste { list-style: none; padding: 0; margin: 0; }
.dateiliste li { padding: 0.6rem 0; border-top: 1px solid var(--line); }
.dateiliste a { font-weight: 650; }
.typ { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.dateiname { font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; color: var(--muted); overflow-wrap: anywhere; }
.einzeln { margin: 0.4rem 0 0.2rem; }
.fortschritt { position: sticky; top: 0; z-index: 2; background: var(--bg); padding: 0.55rem 0; margin: 0.5rem 0 1rem; border-bottom: 1px solid var(--line); }
.fortschritt .zahl { margin: 0.3rem 0 0; font-size: 0.9rem; color: var(--muted); }
.balken { height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; }
.balken span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #16a34a, #22c55e); border-radius: 999px; transition: width 0.25s ease; }
.zuruecksetzen { margin: 1.5rem 0; }
.reset { font: inherit; font-size: 0.95rem; background: var(--card); border: 1px solid var(--control); border-radius: 12px; color: var(--fg); cursor: pointer; padding: 0.55rem 1rem; }
.schritte ol { padding-left: 0; list-style: none; counter-reset: schritt; }
.schritte li { counter-increment: schritt; position: relative; margin: 0.5rem 0; background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); transition: border-color 0.15s ease, background 0.15s ease; }
.schritte li > label { display: block; padding: 0.65rem 0.9rem 0.65rem 4.6rem; min-height: 3rem; cursor: pointer; }
.schritte li::before {
  content: counter(schritt);
  position: absolute;
  left: 2.65rem;
  top: 0.68rem;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  font-weight: 800;
  background: var(--ton-soft);
  color: var(--ton);
}
.schritte .haken { position: absolute; left: 0.75rem; top: 0.68rem; width: 1.6rem; height: 1.6rem; margin: 0; accent-color: var(--ok); cursor: pointer; }
.schritte li.erledigt { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 6%, var(--card)); }
.schritte li.erledigt::before { background: var(--ok); color: var(--card); }
.schritte li.erledigt > label { color: var(--muted); }

/* Long German words must never push the page sideways */
h1, h2, h3, .liste a, .blaettern a, .card h2, .bereich strong { overflow-wrap: break-word; hyphens: auto; hyphenate-limit-chars: 12 5 5; }

/* Article quiz */
.quiz { margin-top: 2.5rem; }
.quiz-frage { border: 1px solid var(--line); border-radius: var(--r); background: var(--card); padding: 0.8rem 1rem 0.9rem; margin: 0.9rem 0; box-shadow: var(--shadow); }
.quiz-frage legend { float: left; width: 100%; font-weight: 750; padding: 0; margin: 0 0 0.35rem; }
.quiz-frage legend + * { clear: both; }
.quiz-antwort { display: flex; gap: 0.65rem; align-items: flex-start; width: 100%; text-align: left; font: inherit; color: var(--fg); background: var(--card); padding: 0.6rem 0.75rem; margin: 0.45rem 0; border: 1.5px solid var(--line); border-radius: 12px; cursor: pointer; transition: border-color 0.15s ease, background 0.15s ease; }
.quiz-frage:not([data-fertig]) .quiz-antwort:hover { border-color: var(--ton-rand); background: var(--ton-soft); }
.quiz-antwort:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.quiz-buchstabe { flex: none; width: 1.75rem; height: 1.75rem; border-radius: 50%; display: grid; place-items: center; font-weight: 800; background: var(--ton-soft); color: var(--ton); }
.quiz-antwort.ist-richtig { border: 2px solid var(--ok); background: color-mix(in srgb, var(--ok) 7%, var(--card)); }
.quiz-antwort.ist-richtig .quiz-buchstabe { background: var(--ok); color: var(--card); }
.quiz-antwort.gewaehlt-falsch { border: 2px solid var(--warn-line); background: var(--warn-bg); }
.quiz-antwort.gewaehlt-falsch .quiz-buchstabe { background: var(--warn-line); color: var(--card); }
.quiz-frage[data-fertig] .quiz-antwort { cursor: default; }
.quiz-rueckmeldung p { margin: 0.45rem 0 0; }
.quiz-rueckmeldung .ok { color: var(--ok); font-weight: 800; }
.quiz-rueckmeldung .falsch { color: var(--warn-line); font-weight: 800; }
.quiz-erklaerung, .quiz-quelle { color: var(--muted); font-size: 0.92rem; }
.quiz-stand { font-weight: 800; margin: 1rem 0 0.5rem; }

/* Notice shown once a day */
.hinweis-dialog { position: fixed; inset: auto 0.75rem 0.75rem; margin: 0 auto; max-width: 40rem; z-index: 50; display: none; gap: 0.8rem; align-items: center; border: 1px solid var(--line); border-radius: var(--r); background: var(--card); color: var(--fg); padding: 0.65rem 0.85rem; box-shadow: 0 12px 34px rgb(0 0 0 / 0.2); font-size: 0.92rem; }
.hinweis-dialog[open] { display: flex; }
.hinweis-dialog:focus { outline: none; }
.hinweis-dialog p { margin: 0; flex: 1; }
.hinweis-dialog button { flex: none; font: inherit; font-weight: 700; background: var(--brand); color: #fff; border: 0; border-radius: 12px; padding: 0.5rem 0.95rem; cursor: pointer; }

/* Read-aloud button next to glossary words */
.vorlesen { display: inline-flex; align-items: center; justify-content: center; width: 2.2rem; height: 2.2rem; margin-left: 0.35rem; vertical-align: middle; border: 1px solid var(--line); border-radius: 50%; background: var(--ton-soft); color: var(--ton); cursor: pointer; padding: 0; }
.vorlesen:hover { border-color: var(--ton-rand); }
.vorlesen.spielt { background: var(--ton); color: var(--card); border-color: var(--ton); }

/* Series: box under the title, button to the next part, blocks on topic pages */
.serie { border: 1px solid var(--ton-rand); border-radius: 14px; background: var(--ton-soft); padding: 0.6rem 1rem; margin: 0.8rem 0 1rem; }
.serie summary { cursor: pointer; font-weight: 400; }
.serie details[open] > summary { color: inherit; }
.serie ol { margin: 0.4rem 0 0; padding-left: 1.4rem; }
.serie li { margin: 0.2rem 0; }
.serie-weiter { margin: 1.5rem 0; }
.serie-weiter .btn { font-size: 1.05rem; }
.serie-block { margin: 1rem 0 1.5rem; }
.serie-block .hinweis, .liste .hinweis { color: var(--muted); font-size: 0.92rem; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .card:hover, .bereich:hover, .blaettern a:hover, .btn:hover { transform: none; }
}

/* Print: content only, all answers visible */
@media print {
  body { background: #fff; color: #000; font-size: 11pt; }
  .site-header, .site-footer, .toc, .fortschritt, .zuruecksetzen, .blaettern, .startsuche, .suchfeld, .chips, .downloads .btn,
  .quiz, .hinweis-dialog, .vorlesen { display: none !important; }
  main { max-width: none; padding: 0; }
  a, main a { color: #000; }
  .hero { color: #000; background: none; box-shadow: none; padding: 0; }
  .hero h1, .hero .lead { color: #000; }
  * { box-shadow: none !important; }
  details > summary { list-style: none; }
  details::details-content { content-visibility: visible; display: block; }
  .kurz, .ergaenzung, .info, .achtung, .notiz, .schritte li, main details { break-inside: avoid; }
}