:root {
  --bg: #faf7f0;
  --fg: #2a2522;
  --sub: #7a716a;
  --card: #ffffff;
  --line: #e6dfd2;
  --accent: #a8322d;
  --accent-ink: #ffffff;
  --ok: #2e8b57;
  --ok-bg: #e6f4ec;
  --ng: #c8423a;
  --ng-bg: #fbe8e6;
  --shadow: 0 2px 10px rgba(60, 40, 20, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f3eee8;
    --sub: #a99f96;
    --card: #282320;
    --line: #3d3631;
    --accent: #d2554d;
    --ok: #5cc28a;
    --ok-bg: #1f3a2b;
    --ng: #ef7a70;
    --ng-bg: #43231f;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
body {
  font-family: system-ui, -apple-system, "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  -webkit-tap-highlight-color: transparent;
  min-height: 100dvh;
}
#app { max-width: 480px; margin: 0 auto; padding: 16px 16px calc(24px + env(safe-area-inset-bottom)); }
.hidden { display: none !important; }
h1, h2, h3 { margin: 0; }
h2 { font-size: 22px; margin: 8px 0 12px; }
.sub { color: var(--sub); font-size: 14px; margin: 4px 0; }
.note { color: var(--sub); font-size: 12px; text-align: center; }

button { font: inherit; cursor: pointer; border: 0; border-radius: 12px; color: inherit; }
button:disabled { opacity: 0.5; cursor: default; }
.primary { background: var(--accent); color: var(--accent-ink); padding: 14px 18px; font-size: 17px; font-weight: 700; }
.secondary { background: var(--card); border: 1px solid var(--line); padding: 14px 18px; font-size: 16px; }
.big { width: 100%; padding: 18px; font-size: 20px; }
.link { background: none; color: var(--sub); text-decoration: underline; padding: 8px; font-size: 14px; }
.row { display: flex; gap: 10px; margin-top: 12px; }
.row > button { flex: 1; }

.brand { text-align: center; margin: 24px 0 20px; }
.brand h1 { font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif; font-size: 44px; letter-spacing: 6px; color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; box-shadow: var(--shadow); }
.hero { text-align: center; }
.hero-lead { font-size: 22px; font-weight: 700; margin: 0 0 4px; }
.hero .big { margin-top: 14px; }
.name-line { text-align: center; font-size: 14px; margin-top: 20px; }

.quiz-top { display: flex; justify-content: space-between; color: var(--sub); font-size: 14px; }
.timer { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin: 8px 0 12px; }
.timer i { display: block; height: 100%; width: 100%; background: var(--accent); transform-origin: left; }
.word {
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  font-weight: 700; font-size: 72px; line-height: 1.25; text-align: center;
  min-height: 1.6em; margin: 20px 0 28px; word-break: keep-all; overflow-wrap: anywhere;
}
.word.len5 { font-size: 56px; }
.word.len7 { font-size: 44px; }
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.choices button {
  min-height: 68px; padding: 10px 6px; font-size: 19px; background: var(--card);
  border: 2px solid var(--line); box-shadow: var(--shadow); overflow-wrap: anywhere;
}
.choices button.long { font-size: 16px; }
.choices button.ok { border-color: var(--ok); background: var(--ok-bg); }
.choices button.ng { border-color: var(--ng); background: var(--ng-bg); }
.feedback { margin-top: 14px; padding: 12px 14px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; position: relative; }
.verdict { margin: 0; font-weight: 700; }
.verdict.ok { color: var(--ok); }
.verdict.ng { color: var(--ng); }
.reading { margin: 6px 0 2px; font-size: 18px; }
.meaning { margin: 4px 0 0; font-size: 15px; line-height: 1.6; }
.report-link { font-size: 12px; padding: 4px 0 0; display: block; margin-left: auto; }
#q-next { margin-top: 12px; }

#result { text-align: center; }
/* 10 squares on one line even on a 320px-wide phone. */
.grid { font-size: min(26px, 7.4vw); letter-spacing: 1px; white-space: nowrap; margin: 18px 0 10px; }
.score { font-size: 30px; font-weight: 700; margin: 6px 0; }
.title { font-size: 22px; font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif; color: var(--accent); margin: 4px 0 16px; }
#result .big { margin-top: 8px; }

.review-list, .board { list-style: none; padding: 0; margin: 0 0 16px; }
.review-list li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; }
.review-list .rw { font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif; font-size: 24px; font-weight: 700; }
.review-list .ra { font-size: 16px; margin-left: 8px; }
.review-list .rm { font-size: 14px; color: var(--sub); margin: 4px 0 0; line-height: 1.5; }
.board li { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.board li.me { background: var(--ok-bg); border-radius: 8px; }
.board .bn { width: 2.5em; text-align: right; color: var(--sub); }
.board .bname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board .bs { font-weight: 700; }

.sheet-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.45); display: flex; align-items: flex-end; justify-content: center; z-index: 10; }
.sheet { background: var(--bg); width: 100%; max-width: 480px; border-radius: 16px 16px 0 0; padding: 18px 16px calc(18px + env(safe-area-inset-bottom)); }
.sheet h3 { margin-bottom: 4px; }
.opt { display: flex; align-items: center; gap: 10px; padding: 12px 4px; font-size: 16px; border-bottom: 1px solid var(--line); }
.opt input { width: 20px; height: 20px; }
.opt-choices { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 0 10px 30px; }
.opt-choices button { background: var(--card); border: 2px solid var(--line); padding: 8px 12px; font-size: 15px; }
.opt-choices button.on { border-color: var(--accent); }
.sheet textarea, .sheet input#name-input { width: 100%; margin-top: 12px; padding: 10px; font: inherit; font-size: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--fg); }
.error { color: var(--ng); font-size: 14px; min-height: 1.2em; margin: 6px 0 0; }

.accent { color: var(--accent); font-weight: 700; }
.center { text-align: center; }
.wide { width: 100%; margin-top: 10px; }
.room-banner { margin-top: 12px; text-align: center; }
.room-banner p { margin: 0 0 8px; }
.room-banner button { width: 100%; }
#room .big { margin: 12px 0; }
#cardview .big { margin-top: 14px; }
.review-list .share-link { font-size: 12px; padding: 4px 8px 0 0; }

.streak { color: var(--accent); font-weight: 700; margin: 6px 0 0; }
.legal { text-align: center; font-size: 12px; color: var(--sub); margin-top: 24px; }
.legal a { color: var(--sub); }
.promo { display: block; margin-top: 20px; text-decoration: none; color: inherit; text-align: center; }
.promo b { display: block; font-size: 17px; margin: 2px 0; }

.share-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.85); z-index: 30; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 16px; }
.share-overlay img { max-width: 100%; max-height: 62vh; border-radius: 8px; }
.share-overlay p { color: #fff; font-size: 14px; text-align: center; margin: 0; }
.share-overlay .row { width: 100%; max-width: 420px; }
.share-overlay a.secondary { text-align: center; text-decoration: none; color: var(--fg); }

/* Ad slots (public/ads.js). Fixed height and kept clear of buttons, so nothing shifts under a finger. */
.ad-slot { width: 300px; max-width: 100%; height: 250px; margin: 24px auto 8px; }
.ad-slot[hidden] { display: none; }
.ad-placeholder {
  position: relative; display: flex; align-items: center; justify-content: center; width: 100%; height: 100%;
  border: 1.5px dashed var(--line); border-radius: 8px; background: var(--card); color: var(--sub); font-size: 14px;
}
.ad-label { position: absolute; top: 6px; left: 6px; padding: 1px 6px; border-radius: 4px; background: var(--sub); color: var(--bg); font-size: 11px; }

.toast { position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--fg); color: var(--bg); padding: 10px 16px; border-radius: 20px; font-size: 14px; z-index: 20; max-width: 90vw; }
.loading { text-align: center; color: var(--sub); margin-top: 40vh; }