/* Matte med Tyra. Designet er laget i Claude Design (Tyra Matte.html), bevisst bare mørkt.
   Layout: toppstripe med prinsippene som faner, forklaringen til venstre, én oppgave midt på. */
:root {
  --bg: #141413; --panel: #1a1918; --raise: #1d1c1a;
  --line: #2a2927; --line-strong: #3a3936; --input-line: #4a4844;
  --ink: #f2f0eb; --soft: #c4c1b9; --muted: #9a978f; --faint: #7d7a73;
  --accent: oklch(0.82 0.13 85); --accent-hover: oklch(0.9 0.1 85);
  --ok: oklch(0.8 0.13 155); --bad: oklch(0.75 0.14 25);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Instrument Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
button { font: inherit; color: inherit; cursor: pointer; }
input { font: inherit; }
input:focus { outline: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

.mono { font: 400 11px var(--mono); opacity: 0.6; }
.sq { white-space: nowrap; }
.rad { border-top: 0.06em solid currentColor; padding: 0 0.08em 0 0.04em; }
sup { font-size: 0.6em; line-height: 0; vertical-align: 0.7em; }

.shell { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }

/* Toppstripe */
.hdr { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; padding: 18px 32px; border-bottom: 1px solid var(--line); }
.brandrow { display: flex; align-items: baseline; gap: 14px; flex: none; }
.brand { font: 400 22px var(--serif); color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.brand i { color: var(--accent); }
.topic-btn { display: flex; align-items: center; gap: 8px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--raise); color: var(--soft); font-size: 13px; white-space: nowrap; }
.topic-btn:hover { border-color: var(--line-strong); }
.caret { font-size: 10px; color: var(--faint); }
.tabs { order: 3; flex: 1 1 100%; min-width: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.tab { flex: none; display: flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--soft); font-size: 13px; font-weight: 500; white-space: nowrap; transition: border-color 0.15s; }
.tab:hover { border-color: var(--line-strong); }
.tab.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.overall { flex: none; margin-left: auto; display: flex; align-items: center; gap: 10px; font: 400 12px var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.obar { width: 96px; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.ofill { height: 100%; background: var(--accent); transition: width 0.4s; }

/* Temaer */
.topics { display: flex; flex-wrap: wrap; gap: 12px; padding: 20px 32px; border-bottom: 1px solid var(--line); background: var(--panel); }
.tema { display: flex; flex-direction: column; gap: 4px; min-width: 220px; padding: 14px 18px; border-radius: 10px; border: 1px solid var(--line-strong); color: var(--ink); text-decoration: none; }
a.tema:hover { color: var(--ink); border-color: var(--muted); }
.tema .mono { opacity: 1; color: var(--muted); }
.tema.on { border-color: var(--accent); }
.tema.on .mono { color: var(--accent); }
.tema.later { border-style: dashed; color: var(--faint); }
.tema.later .mono { color: var(--faint); }
.tema-title { font: 400 22px var(--serif); }
.tema-sub { font-size: 12px; color: var(--muted); }
.tema.later .tema-sub { color: var(--faint); }

/* Innhold */
.body { flex: 1; display: flex; flex-wrap: wrap; min-height: 0; }

.princ { flex: 1 1 300px; max-width: 400px; display: flex; flex-direction: column; gap: 18px; padding: 36px 32px; border-right: 1px solid var(--line); }
.princ-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.eyebrow { font: 500 10px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.princ h2 { margin: 0; font: 400 34px/1.1 var(--serif); text-wrap: balance; }
.explain { margin: 0; font-size: 15px; line-height: 1.6; color: var(--soft); text-wrap: pretty; }
.box { display: flex; flex-direction: column; gap: 10px; padding: 18px 20px; border-radius: 10px; background: var(--raise); }
.box-label { font: 500 10px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.step { display: flex; flex-direction: column; gap: 2px; }
.eq { font: 400 16px var(--mono); overflow-wrap: anywhere; }
.note { font-size: 12px; color: var(--faint); font-style: italic; }
.tip { margin: 0; font-size: 13px; line-height: 1.55; color: var(--muted); }

.stage { flex: 3 1 460px; min-width: 0; position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 32px; padding: 56px 32px; }
.show-aside { position: absolute; top: 24px; left: 24px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--raise); color: var(--soft); font-size: 12px; }
.kicker { font: 400 12px var(--mono); color: var(--faint); letter-spacing: 0.08em; text-align: center; }
.q { max-width: 100%; font: 400 clamp(52px, 8vw, 88px)/1.05 var(--serif); letter-spacing: -0.01em; text-align: center; overflow-wrap: anywhere; }
.q.mid { font-size: clamp(42px, 6.5vw, 76px); }
.q.long { font-size: clamp(32px, 5vw, 60px); }
/* Rotstreken tett over tallene i den store serifskriften */
.q .rad, .opt .rad { display: inline-block; line-height: 0.78; padding-top: 0.06em; }
.q.text { font-size: clamp(28px, 3.6vw, 42px); line-height: 1.2; max-width: 22ch; text-wrap: balance; }

.answer { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; }
.lab { font: italic 400 36px var(--serif); color: var(--muted); white-space: nowrap; }
.inp { width: 170px; padding: 10px 0; border: 0; border-bottom: 2px solid var(--input-line); background: transparent; color: var(--ink); font: 400 36px var(--serif); text-align: center; transition: border-color 0.15s; }
.inp:focus { border-bottom-color: var(--accent); }
.inp.right { border-bottom-color: var(--ok); }
.inp.wrong, .inp.invalid { border-bottom-color: var(--bad); }
.inp.almost, .inp.decimal { border-bottom-color: var(--accent); }
.inp::placeholder { color: var(--input-line); }
.key { width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line-strong); background: transparent; color: var(--soft); font: 400 24px var(--serif); transition: border-color 0.15s, color 0.15s; }
.key:hover { border-color: var(--accent); color: var(--accent); }
.check { white-space: nowrap; margin-left: 12px; padding: 12px 22px; border: 0; border-radius: 999px; background: var(--accent); color: var(--bg); font-size: 14px; font-weight: 600; transition: background 0.15s; }
.check:hover { background: var(--accent-hover); }

.opts { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; max-width: 560px; }
.opt { padding: 12px 22px; border-radius: 999px; border: 1px solid var(--input-line); background: transparent; color: var(--ink); font: 400 24px var(--serif); transition: border-color 0.15s; }
.opt:hover { border-color: var(--accent); }
.opt.right { border-color: var(--ok); color: var(--ok); }
.opt.wrong { border-color: var(--bad); color: var(--bad); }

.fb { min-height: 72px; display: flex; flex-direction: column; align-items: center; gap: 10px; max-width: 520px; text-align: center; }
.fb .ok { display: flex; align-items: center; flex-wrap: wrap; justify-content: center; gap: 14px; font-size: 15px; color: var(--ok); }
.pill-ok { white-space: nowrap; flex: none; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--ok); background: transparent; color: var(--ok); font-size: 13px; }
.fb .almost { font-size: 15px; color: var(--accent); }
.fb .bad { font-size: 15px; color: var(--bad); }
.panel { padding: 10px 16px; border-radius: 8px; background: var(--raise); font-size: 14px; color: var(--soft); }
.panel.sol { display: flex; flex-direction: column; gap: 4px; padding: 12px 18px; }
.panel.sol .eq { font-size: 15px; color: var(--soft); }

.pager { display: flex; align-items: center; gap: 28px; }
.ghost { white-space: nowrap; border: 0; background: none; color: var(--muted); font-size: 13px; }
.ghost:hover { color: var(--ink); }
.ghost.small { font-size: 12px; color: var(--faint); }
.dots { display: flex; gap: 8px; }
.dot { width: 10px; height: 10px; padding: 0; border-radius: 50%; border: 1px solid var(--input-line); background: transparent; }
.dot.on { border-color: var(--accent); background: var(--accent); }
.dot.right { border-color: var(--ok); background: var(--ok); }
.helps { display: flex; gap: 20px; }
.link { white-space: nowrap; border: 0; background: none; color: var(--faint); font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
.link:hover { color: var(--soft); }

/* Mobil */
@media (max-width: 760px) {
  .hdr { padding: 14px 16px; gap: 12px 16px; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; margin-inline: -16px; padding-inline: 16px; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .topics { padding: 16px; }
  .tema { min-width: 0; flex: 1 1 200px; }
  .princ { max-width: none; flex-basis: 100%; padding: 24px 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .stage { padding: 64px 16px 40px; gap: 26px; }
  .check { margin-left: 0; }
  .pager { gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}