/* ============================================================
   style.css — Übersichts-/Hub-Seite (House-Style Hans Lietz).
   Zero-Dependency, responsiv, WCAG-AA, Touch-Targets >=44px.
   ============================================================ */
:root {
  --accent: #2f5fb0;
  --navy: #1d3557;
  --ink: #1f2433;
  --muted: #586074;
  --line: #d8dee9;
  --paper: #ffffff;
  --bg: #eef2fb;
  --soft: #f5f8fd;
  --r: 16px;
  --shadow: 0 8px 24px rgba(29, 53, 87, .12);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); line-height: 1.55;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 440px at 100% -60px, #dbe6ff 0, transparent 60%), var(--bg);
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.top { background: linear-gradient(135deg, var(--navy), #34508a); color: #fff; padding: 1.4rem 1.1rem 1.6rem; box-shadow: var(--shadow); }
.top__inner { max-width: 1020px; margin: 0 auto; }
.top h1 { margin: 0; font-size: clamp(1.5rem, 4vw, 2.3rem); }
.top p { margin: .4rem 0 0; opacity: .94; font-size: 1rem; }

main { max-width: 1020px; margin: 0 auto; padding: 1.2rem 1.1rem 3rem; }

/* ---------- Filter ---------- */
.filters { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); padding: 1rem 1.1rem; margin-bottom: 1.2rem; }
.filters__search { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: .6rem; }
.filters__search input { flex: 1; min-width: 200px; border: 1.5px solid var(--line); border-radius: 12px; padding: .65rem .8rem; font: inherit; min-height: 44px; }
.resetbtn { border: 1.5px solid var(--line); background: var(--soft); color: var(--navy); border-radius: 12px; padding: .55rem 1rem; font-weight: 700; cursor: pointer; min-height: 44px; }
.resetbtn:hover { background: #e9eefb; }
.filters__group { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; margin: .5rem 0; }
.filters__label { color: var(--muted); font-weight: 800; font-size: .82rem; min-width: 3.2rem; text-transform: uppercase; letter-spacing: .03em; }
.chips { display: flex; gap: .4rem; flex-wrap: wrap; }
.chip { border: 1.5px solid var(--line); background: var(--soft); color: var(--ink); border-radius: 999px; padding: .4rem .8rem; font-weight: 700; font-size: .85rem; cursor: pointer; min-height: 44px; }
.chip:hover { border-color: var(--accent); }
.chip.is-on { background: var(--accent); border-color: var(--accent); color: #fff; }
.count { margin: .7rem 0 0; color: var(--muted); font-weight: 700; font-size: .9rem; }

/* ---------- Karten-Grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.card { display: flex; flex-direction: column; gap: .35rem; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r); box-shadow: var(--shadow); padding: 1rem 1.1rem; text-decoration: none; color: var(--ink);
  transition: transform .12s, box-shadow .12s, border-color .12s; }
.card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 14px 34px -8px rgba(47,95,176,.4); }
.card:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.card__icon { font-size: 2.2rem; }
.card__title { font-weight: 800; font-size: 1.18rem; color: var(--navy); }
.card__tags { display: flex; gap: .35rem; flex-wrap: wrap; }
.tag { font-size: .72rem; font-weight: 800; padding: .15rem .55rem; border-radius: 999px; }
.tag--fach { background: #e7eefb; color: #234a8c; }
.tag--stufe { background: #e7f6ec; color: #15603a; }
.card__desc { color: var(--muted); font-size: .92rem; flex: 1; }
.card__thema { display: flex; gap: .3rem; flex-wrap: wrap; margin-top: .2rem; }
.thema { font-size: .72rem; color: var(--muted); background: var(--soft); border: 1px solid var(--line); border-radius: 6px; padding: .05rem .4rem; }
.card__go { margin-top: .3rem; font-weight: 800; color: var(--accent); font-size: .9rem; }

.empty { color: var(--muted); padding: 2rem 0; text-align: center; }
.linkbtn { background: none; border: none; color: var(--accent); font-weight: 800; cursor: pointer; text-decoration: underline; font: inherit; }

.foot { max-width: 1020px; margin: 0 auto; padding: 1.4rem 1.1rem 2rem; color: var(--muted); font-size: .85rem; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }