:root {
  --red: #c8102e;
  --red-dark: #9e0c24;
  --bg: #f4f4f6;
  --card: #ffffff;
  --text: #1c1c22;
  --muted: #6b6b76;
  --border: #dedee4;
  --input: #ffffff;
  --ok: #1f8a4c;
  --warn: #b7791f;
  --bad: #c53030;
  --shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 4px 16px rgba(0, 0, 0, .04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131317;
    --card: #1d1d23;
    --text: #ececf1;
    --muted: #9a9aa6;
    --border: #2e2e37;
    --input: #16161b;
    --ok: #3ccf7c;
    --warn: #e0a84a;
    --bad: #f06a6a;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 15px;
}
a { color: var(--red); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; }

/* Kopfzeile */
.topbar {
  background: var(--red);
  color: #fff;
  border-bottom: 3px solid var(--red-dark);
}
.topbar .inner {
  max-width: 1100px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; }
.brand .logo {
  width: 32px; height: 32px; border-radius: 8px; background: #fff; color: var(--red);
  display: grid; place-items: center; font-weight: 800; font-size: 14px;
}
.brand small { display: block; font-weight: 400; opacity: .85; font-size: 12px; }
.topbar .spacer { flex: 1; }
.userchip { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.userchip img { width: 28px; height: 28px; border-radius: 50%; background: rgba(255,255,255,.3); }
.topbar button { background: rgba(255,255,255,.15); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.topbar button:hover { background: rgba(255,255,255,.25); }

nav.tabs { max-width: 1100px; margin: 0 auto; padding: 12px 16px 0; display: flex; gap: 6px; flex-wrap: wrap; }
nav.tabs a {
  text-decoration: none; color: var(--muted); padding: 7px 14px; border-radius: 8px; font-weight: 600;
}
nav.tabs a.active { background: var(--card); color: var(--text); box-shadow: var(--shadow); }

main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.center-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.card.narrow { max-width: 480px; width: 100%; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > .field { flex: 1 1 160px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }

label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 4px; }
input[type=text], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--input); color: var(--text); font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--red); outline-offset: -1px; border-color: transparent; }

button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
  text-decoration: none; white-space: nowrap;
}
button:hover, .btn:hover { filter: brightness(.97); }
button:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary, button.primary { background: var(--red); color: #fff; border-color: var(--red); }
.btn-primary:hover, button.primary:hover { background: var(--red-dark); }
button.danger { color: var(--bad); }
button.small, .btn.small { padding: 5px 10px; font-size: 13px; }
.btn-discord { background: #5865f2; border-color: #5865f2; color: #fff; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.table-wrap { overflow-x: auto; }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--bg); border: 1px solid var(--border);
}
.badge.ok { color: var(--ok); border-color: currentColor; }
.badge.bad { color: var(--bad); border-color: currentColor; }
.badge.warn { color: var(--warn); border-color: currentColor; }

.notice { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); margin: 10px 0; }
.notice.error { border-color: var(--bad); color: var(--bad); }
.notice.success { border-color: var(--ok); color: var(--ok); }

.linkbox { display: flex; gap: 8px; align-items: center; }
.linkbox input { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }

.question { border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-bottom: 12px; }
.question .qhead { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.question .qtext { white-space: pre-wrap; font-weight: 600; }
.option { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); margin: 6px 0; cursor: pointer; }
.option input { margin-top: 3px; }
.option.correct { border-color: var(--ok); }
.option.wrong { border-color: var(--bad); }
.answer-text { white-space: pre-wrap; background: var(--bg); padding: 10px; border-radius: 8px; border: 1px solid var(--border); }
.opt-edit { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; }
.opt-edit input[type=text] { flex: 1; }

.toast {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 8px; box-shadow: var(--shadow); z-index: 100; max-width: calc(100% - 32px);
}

/* Prüfungsseite */
.exam-bar {
  position: sticky; top: 0; z-index: 20; background: var(--card); border-bottom: 1px solid var(--border);
}
.exam-bar .inner { max-width: 860px; margin: 0 auto; padding: 10px 16px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 18px; }
.timer.low { color: var(--bad); }
.exam-main { max-width: 860px; }
.no-select, .no-select * { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
.no-select textarea { -webkit-user-select: text; user-select: text; }
.progress { height: 6px; background: var(--bg); border-radius: 4px; overflow: hidden; flex: 1 1 120px; }
.progress > div { height: 100%; background: var(--red); transition: width .2s; }

@media (max-width: 600px) {
  .hide-mobile { display: none; }
  th, td { padding: 8px 5px; }
}