:root {
  --bg: #f6f4ef; --card: #fff; --ink: #1d2433; --muted: #6b7280; --line: #e5e1d8;
  --accent: #1f6feb; --accent-ink: #fff; --good: #1a8f4c; --good-bg: #e6f6ec;
  --bad: #c2372b; --bad-bg: #fdecea; --track: #ebe7de;
  --m0: #d6d3cc; --m1: #f2b84b; --m2: #f2a03d; --m3: #8cc265; --m4: #4caf6a; --m5: #1a8f4c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161b; --card: #1d2027; --ink: #e8e6e1; --muted: #9aa0ab; --line: #2c3039;
    --accent: #5b9bff; --accent-ink: #0b1220; --good: #4cc983; --good-bg: #173226;
    --bad: #ff7b6e; --bad-bg: #3a1d1b; --track: #2a2e36; --m0: #3a3e47;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 Inter, system-ui, sans-serif; }
a { color: var(--accent); text-decoration: none; }
button { font: inherit; cursor: pointer; }

.top { display: flex; align-items: center; gap: 24px; padding: 14px 24px; border-bottom: 1px solid var(--line); background: var(--card); position: sticky; top: 0; z-index: 2; }
.logo { font: 700 24px Fraunces, Georgia, serif; color: var(--ink); letter-spacing: -0.5px; }
.logo span { color: var(--accent); }
nav { display: flex; gap: 4px; flex: 1; }
nav a { color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500; }
nav a.on { color: var(--ink); background: var(--track); }
.points { font-weight: 600; white-space: nowrap; }
.points span { color: var(--accent); }

main { max-width: 760px; margin: 0 auto; padding: 32px 16px 80px; }
h1, h2 { font-family: Fraunces, Georgia, serif; font-weight: 700; letter-spacing: -0.5px; }
h1 { font-size: 34px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 28px; }

.lists { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 24px; }
.listbtn { text-align: left; background: var(--card); border: 2px solid var(--line); border-radius: 12px; padding: 14px 16px; color: var(--ink); }
.listbtn.on { border-color: var(--accent); }
.listbtn b { display: block; font-size: 17px; }
.listbtn small { color: var(--muted); }

.qtype { text-transform: uppercase; font-size: 12px; letter-spacing: 1px; color: var(--muted); font-weight: 600; margin-bottom: 10px; }
.prompt { font-size: 22px; margin-bottom: 22px; }
.prompt .w { font: 700 30px Fraunces, Georgia, serif; color: var(--accent); }
.prompt .quote { display: block; font-style: italic; margin-top: 6px; }
.prompt .sent { display: block; font: 500 24px/1.4 Fraunces, Georgia, serif; margin-top: 8px; }
.choices { display: grid; gap: 10px; }
.choice { text-align: left; padding: 14px 18px; border: 2px solid var(--line); background: var(--card); color: var(--ink); border-radius: 10px; font-size: 17px; transition: border-color .1s, background .1s; }
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice.right { border-color: var(--good); background: var(--good-bg); }
.choice.wrong { border-color: var(--bad); background: var(--bad-bg); }
.choice:disabled { cursor: default; }
.choice kbd { display: inline-block; width: 22px; color: var(--muted); font: 600 13px Inter, sans-serif; }

.feedback { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.feedback .verdict { font-weight: 700; margin-bottom: 6px; }
.feedback .verdict.good { color: var(--good); } .feedback .verdict.bad { color: var(--bad); }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.btn { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; padding: 12px 22px; font-weight: 600; }
.btn.ghost { background: transparent; color: var(--accent); border: 2px solid var(--line); }

.status { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.status .bar { flex: 1; }
.bar { height: 8px; background: var(--track); border-radius: 99px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--good); border-radius: 99px; transition: width .3s; }

.meter { display: inline-flex; gap: 3px; vertical-align: middle; }
.meter i { width: 14px; height: 6px; border-radius: 3px; background: var(--m0); }
.meter.l1 i:nth-child(-n+1) { background: var(--m1); } .meter.l2 i:nth-child(-n+2) { background: var(--m2); }
.meter.l3 i:nth-child(-n+3) { background: var(--m3); } .meter.l4 i:nth-child(-n+4) { background: var(--m4); }
.meter.l5 i { background: var(--m5); }

.search { width: 100%; padding: 14px 18px; font-size: 18px; border: 2px solid var(--line); border-radius: 12px; background: var(--card); color: var(--ink); margin-bottom: 18px; }
.search:focus { outline: none; border-color: var(--accent); }
.wordlist { display: grid; gap: 8px; }
.wl { display: flex; align-items: baseline; gap: 12px; padding: 12px 16px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; color: var(--ink); }
.wl:hover { border-color: var(--accent); }
.wl b { font: 700 18px Fraunces, Georgia, serif; }
.wl .d { color: var(--muted); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.entry h1 { font-size: 44px; margin-bottom: 0; }
.pos { color: var(--muted); font-style: italic; margin-bottom: 18px; }
.blurb { font-size: 19px; line-height: 1.6; margin: 0 0 22px; }
.deflabel { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); font-weight: 600; margin: 18px 0 4px; }
.ex { font-style: italic; }
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { background: var(--track); border-radius: 99px; padding: 4px 12px; font-size: 14px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 24px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.stat b { display: block; font: 700 32px Fraunces, Georgia, serif; }
.stat small { color: var(--muted); }
.plist { margin-bottom: 18px; }
.plist .row { margin: 0 0 6px; }

@media (max-width: 600px) {
  .top { gap: 10px; padding: 12px 16px; flex-wrap: wrap; }
  nav { order: 3; flex-basis: 100%; }
  .points { margin-left: auto; }
  main { padding-top: 20px; }
  .card { padding: 20px; }
  .prompt { font-size: 19px; } .prompt .w { font-size: 26px; } .prompt .sent { font-size: 20px; }
  .stats { grid-template-columns: 1fr; }
  .entry h1 { font-size: 36px; }
  .wl .d { display: none; }
}

/* Sentence context + pinned next bar */
.prompt .sent.ctx { margin: 0 0 14px; padding-left: 14px; border-left: 3px solid var(--line); }
.prompt .hl { color: var(--accent); }
.choice.right:not([disabled]) { cursor: pointer; }
.nextbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 3; display: flex; align-items: center; justify-content: center; gap: 16px; padding: 14px 16px calc(14px + env(safe-area-inset-bottom)); background: var(--card); border-top: 3px solid var(--good); box-shadow: 0 -6px 20px rgba(0,0,0,.08); animation: up .15s ease-out; }
.nextbar.bad { border-top-color: var(--bad); }
.nextbar .verdict { font-weight: 700; }
.nextbar.good .verdict { color: var(--good); } .nextbar.bad .verdict { color: var(--bad); }
.nextbar .timer { position: absolute; top: -3px; left: 0; height: 3px; width: 100%; background: var(--accent); transform-origin: left; animation: drain 1.3s linear forwards; }
@keyframes drain { to { transform: scaleX(0); } }
@keyframes up { from { transform: translateY(100%); } }
main { padding-bottom: 120px; }