:root {
  --bg: #17121b;
  --bg-tint: #1e1824;
  --surface: #221b29;
  --surface-2: #2a2131;
  --surface-3: #35293d;
  --ink: #f5eff3;
  --ink-2: #c4b3be;
  --ink-3: #9c8b97;
  --line: #382d41;
  --line-strong: #4d3f57;
  --sakura: #f28aa4;
  --sakura-ring: #f28aa447;
  --sakura-soft: #7a4457;
  --sakura-tint: #35222b;
  --matcha: #74cb9f;
  --matcha-tint: #1f2f27;
  --shu: #f18a78;
  --shu-tint: #33211e;
  --kincha: #e3b86a;
  --kincha-tint: #2f261a;
  --on-accent: #1d141b;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-jp: "Zen Maru Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, "Noto Sans JP", sans-serif;
  --ease: cubic-bezier(.32,.72,0,1);
  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 20px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 400 15px/1.5 var(--font-ui);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
[hidden] { display: none !important; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: var(--sakura); text-decoration: none; }
a:hover { text-decoration: underline; }
kbd {
  font: 500 11px var(--font-ui);
  padding: 1px 6px; border-radius: 5px;
  border: 1px solid var(--line-strong); background: var(--surface);
  color: var(--ink-2);
}

/* Top bar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; max-width: 760px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center;
  background: var(--sakura); color: var(--on-accent); font: 700 18px var(--font-jp);
}
.brand-dot { color: var(--sakura); margin-left: -8px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2);
  transition: border-color .15s, color .15s;
}
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); }

.wrap { max-width: 760px; margin: 0 auto; padding: 8px 20px 48px; }
.eyebrow { margin: 12px 0 2px; font-size: 12px; font-weight: 600; letter-spacing: .08em; color: var(--ink-3); text-transform: uppercase; }
.title { margin: 0 0 18px; font-size: 22px; font-weight: 700; letter-spacing: -.01em; }
.muted { color: var(--ink-2); margin-top: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 24px;
}

/* Buttons */
.btn {
  border: 1px solid var(--line-strong); background: var(--surface-2);
  padding: 9px 16px; border-radius: var(--r-md); font-weight: 600; font-size: 14px;
  transition: background .15s, border-color .15s, transform .1s;
}
.btn:hover { background: var(--surface-3); }
.btn:active { transform: scale(.98); }
.btn.small { padding: 7px 12px; font-size: 13px; }
.btn.primary { background: var(--sakura); border-color: var(--sakura); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--shu); }
.ghost-btn {
  display: inline-flex; align-items: center; gap: 6px; border: 0; background: none;
  color: var(--sakura); font-weight: 600; font-size: 13px; padding: 7px 8px; border-radius: var(--r-sm);
}
.ghost-btn:hover { background: var(--sakura-tint); }

/* Setup */
.setup h2, .summary h2, .settings h2 { margin: 0 0 6px; font-size: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; margin: 16px 0; font-size: 13px; color: var(--ink-2); font-weight: 500; }
.field span a { margin-left: 6px; font-weight: 500; }
.field input {
  background: var(--bg-tint); border: 1px solid var(--line); color: var(--ink);
  border-radius: var(--r-md); padding: 11px 12px; font: 14px var(--font-ui); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus { border-color: var(--sakura); box-shadow: 0 0 0 3px var(--sakura-ring); }
.field.inline { flex-direction: row; align-items: center; flex-wrap: wrap; }
.field.inline input { width: 80px; padding: 7px 10px; }
.check { display: flex; align-items: center; gap: 10px; margin: 12px 0; font-size: 14px; color: var(--ink); }
.check input { accent-color: var(--sakura); width: 16px; height: 16px; }
.error { color: var(--shu); background: var(--shu-tint); padding: 10px 12px; border-radius: var(--r-md); font-size: 13px; }

/* Loading */
.loading { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 56px 24px; color: var(--ink-2); }
.spinner {
  width: 28px; height: 28px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--sakura);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Controls */
.controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.spacer { flex: 1; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1.5px solid var(--sakura-soft); background: var(--sakura-tint); color: var(--sakura);
  border-radius: var(--r-md); padding: 0 10px; height: 34px; font-size: 13px; font-weight: 600;
}
.select-chip select {
  appearance: none; background: none; border: 0; color: inherit; font: inherit; outline: none; cursor: pointer;
  padding-right: 14px;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: right 4px center, right 0 center; background-size: 4px 4px; background-repeat: no-repeat;
}
.select-chip select option { background: var(--surface); color: var(--ink); }
.seg {
  display: inline-flex; padding: 3px; gap: 2px; height: 34px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-md);
}
.seg button {
  border: 0; background: none; color: var(--ink-3); font-size: 13px; font-weight: 600;
  padding: 0 10px; border-radius: 9px; transition: background .15s, color .15s;
}
.seg.types button { font-family: var(--font-jp); font-weight: 500; font-size: 14px; }
.seg button:hover { color: var(--ink-2); }
.seg button.on { background: var(--surface-3); color: var(--ink); }

.progress-row { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.bar { flex: 1; height: 6px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--sakura); border-radius: 99px; transition: width .4s var(--ease); }
.pill {
  font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 99px;
  background: var(--surface-2); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap;
}
.pill.ok { color: var(--matcha); }
.pill.ok.hot { background: var(--matcha-tint); border-color: #2f4a3c; }

/* Question card */
.q-card { padding: 28px 20px 20px; text-align: center; }
.q-prompt { margin: 0; color: var(--ink-2); font-size: 13px; font-weight: 500; }
.q-display {
  margin: 14px 0 6px; font-family: var(--font-jp); font-weight: 400; line-height: 1.15;
  font-size: 104px; color: var(--ink); transition: color .2s; word-break: keep-all;
  min-height: 1.15em; display: flex; align-items: center; justify-content: center;
}
.q-display.len-3 { font-size: 84px; }
.q-display.len-4 { font-size: 68px; }
.q-display.len-6 { font-size: 52px; }
.q-display.len-9 { font-size: 40px; }
.q-display.english { font-family: var(--font-ui); font-weight: 600; font-size: 36px; letter-spacing: -.01em; padding: 18px 0; }
.q-display.english.long { font-size: 26px; }
.q-display.right { color: var(--matcha); }
.q-display.wrong { color: var(--shu); }
.listen {
  display: inline-flex; align-items: center; gap: 5px; border: 0; background: none;
  color: var(--sakura); font-size: 12px; font-weight: 600; padding: 4px 8px; border-radius: var(--r-sm);
}
.listen:hover { background: var(--sakura-tint); }
.tags { display: flex; gap: 6px; justify-content: center; min-height: 20px; margin: 4px 0 14px; }
.tag {
  font-size: 11px; font-weight: 600; letter-spacing: .02em; padding: 2px 8px; border-radius: 99px;
  background: var(--surface-2); color: var(--ink-3); border: 1px solid var(--line);
}
.tag.leech { color: var(--shu); background: var(--shu-tint); border-color: #4a2d28; }
.tag.new { color: var(--kincha); background: var(--kincha-tint); border-color: #4a3b22; }
.tag.miss { color: var(--sakura); background: var(--sakura-tint); border-color: var(--sakura-soft); }

.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choice {
  position: relative; min-height: 50px; padding: 12px 34px;
  background: var(--surface); border: 2px solid var(--line); border-radius: 14px;
  font-weight: 500; font-size: 15px; line-height: 1.3;
  transition: border-color .15s, background .15s, transform .08s;
}
.choice.jp { font-family: var(--font-jp); font-size: 20px; font-weight: 500; }
.choice:hover:not(:disabled) { border-color: var(--line-strong); background: var(--surface-2); }
.choice:active:not(:disabled) { transform: scale(.985); }
.choice:disabled { cursor: default; }
.choice .num { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font: 600 11px var(--font-ui); color: var(--ink-3); opacity: .7; }
.choice .mark { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); font-size: 14px; }
.choice.correct { border-color: #4f8f6f; background: var(--matcha-tint); color: var(--ink); }
.choice.correct .mark { color: var(--matcha); }
.choice.picked-wrong { border-color: #9a5548; background: var(--shu-tint); }
.choice.dim { opacity: .45; }

/* Feedback banner */
.feedback {
  display: flex; align-items: center; gap: 14px; margin-top: 12px;
  padding: 14px 16px; border-radius: var(--r-lg);
  background: var(--shu-tint); border: 1px solid #4a2d28;
  animation: rise .25s var(--ease);
}
.feedback.good { background: var(--matcha-tint); border-color: #2f4a3c; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.fb-icon {
  flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: #4a2d28; color: var(--shu); font-weight: 700;
}
.feedback.good .fb-icon { background: #2f4a3c; color: var(--matcha); }
.fb-text { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.fb-text strong { color: var(--shu); font-size: 14px; }
.feedback.good .fb-text strong { color: var(--matcha); }
.fb-main { font-family: var(--font-jp); font-size: 17px; color: var(--ink); }
.fb-sub { font-size: 13px; color: var(--ink-2); overflow-wrap: anywhere; }

.pool-line { text-align: center; color: var(--ink-3); font-size: 12px; margin: 22px 0 4px; }
.kbd-hint { text-align: center; color: var(--ink-3); font-size: 12px; margin: 0; }

/* Summary */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0; }
.stat { background: var(--bg-tint); border: 1px solid var(--line); border-radius: var(--r-md); padding: 12px; }
.stat b { display: block; font-size: 22px; }
.stat span { font-size: 12px; color: var(--ink-3); }
.missed-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 18px; }
.missed {
  background: var(--shu-tint); border: 1px solid #4a2d28; border-radius: var(--r-md);
  padding: 6px 10px; font-size: 12px; color: var(--ink-2);
}
.missed b { font: 500 18px var(--font-jp); color: var(--ink); margin-right: 6px; }
.row { display: flex; gap: 10px; }
.row.end { justify-content: flex-end; margin-top: 18px; }
.wrap-row { flex-wrap: wrap; margin-top: 16px; }

/* Settings dialog */
dialog {
  background: var(--surface); color: var(--ink); border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 24px; width: min(480px, calc(100vw - 32px));
}
dialog::backdrop { background: #0a070cb3; backdrop-filter: blur(2px); }

@media (max-width: 560px) {
  .wrap { padding: 4px 16px 40px; }
  .q-display { font-size: 84px; }
  .q-display.len-3 { font-size: 64px; }
  .q-display.len-4 { font-size: 52px; }
  .q-display.len-6 { font-size: 40px; }
  .q-display.len-9 { font-size: 32px; }
  .choices { gap: 8px; }
  .choice { padding: 12px 28px; font-size: 14px; }
  .controls .spacer { display: none; }
  .stats { grid-template-columns: 1fr 1fr 1fr; }
}