:root {
  --bg: #f6f7f4;
  --panel: #ffffff;
  --panel-2: #f0f2ee;
  --ink: #1c211f;
  --muted: #5b6661;
  --line: #dfe3dd;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --accent-soft: #e3f2ef;
  --gold: #a35a00;
  --gold-soft: #fdf1df;
  --good: #166534;
  --good-soft: #e5f4e8;
  --warn: #9a3412;
  --warn-soft: #fbece3;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1311;
    --panel: #161c1a;
    --panel-2: #1d2522;
    --ink: #e6ece9;
    --muted: #9ba7a2;
    --line: #2a3430;
    --accent: #2dd4bf;
    --accent-ink: #052320;
    --accent-soft: #123430;
    --gold: #f6b25a;
    --gold-soft: #3a2a12;
    --good: #6ee7a0;
    --good-soft: #15301f;
    --warn: #fb9a6c;
    --warn-soft: #3a2014;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1311; --panel: #161c1a; --panel-2: #1d2522; --ink: #e6ece9; --muted: #9ba7a2; --line: #2a3430;
  --accent: #2dd4bf; --accent-ink: #052320; --accent-soft: #123430; --gold: #f6b25a; --gold-soft: #3a2a12;
  --good: #6ee7a0; --good-soft: #15301f; --warn: #fb9a6c; --warn-soft: #3a2014; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 16px; line-height: 1.75;
}
a { color: var(--accent); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }
.num, .net b, .price { font-variant-numeric: tabular-nums; }

/* ヘッダー */
.site-head { background: var(--panel); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; gap: 12px; min-height: 58px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; color: var(--ink); text-decoration: none; }
.logo svg { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.tagline { color: var(--muted); font-size: 13px; flex: 1; min-width: 160px; }
.proto { font-size: 12px; border: 1px dashed var(--gold); color: var(--gold); border-radius: 8px; padding: 2px 8px; }

/* トップ */
.hero { padding: 32px 16px 8px; text-align: center; }
.hero h1 { font-size: clamp(24px, 6vw, 36px); line-height: 1.4; margin: 0 0 12px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--muted); margin: 0 auto 18px; max-width: 640px; }
.points { list-style: none; padding: 0; margin: 0 auto 24px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-width: 640px; }
.points li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; font-size: 13px; color: var(--muted); text-align: left; }
.points b { display: block; color: var(--ink); font-size: 15px; }

/* カード・ボタン */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 14px; }
.card h2 { font-size: 17px; margin: 0 0 10px; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; padding: 12px 20px; font-weight: 700; white-space: nowrap; }
.btn-ghost { display: inline-flex; align-items: center; justify-content: center; background: transparent; border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; cursor: pointer; }
.hint { color: var(--muted); font-size: 13px; margin: 10px 0 0; }

/* 検索 */
.search { max-width: 640px; margin-left: auto; margin-right: auto; }
.btn-scan { width: 100%; display: flex; align-items: center; justify-content: center; gap: 10px; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 12px; padding: 16px; font-size: 18px; font-weight: 800; }
.btn-scan svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.or { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; margin: 12px 0; }
.or::before, .or::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
.search-form { display: flex; gap: 8px; }
.search-form input { flex: 1; min-width: 0; border: 1px solid var(--line); background: var(--panel-2); border-radius: 10px; padding: 12px 14px; font-size: 17px; }
.search-form input:focus, select:focus, .stepper input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.ex { background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; font-size: 13px; margin: 4px 2px 0 0; }
.status { min-height: 1.5em; margin: 10px 0 0; font-size: 14px; color: var(--muted); }
.status.err { color: var(--warn); }
.cands { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 8px; }
.cands button { width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.cands img { width: 44px; height: 44px; object-fit: contain; background: #fff; border-radius: 6px; flex: none; }
.cands small { display: block; color: var(--muted); font-size: 12px; }

/* カメラ */
.scanner { margin: 12px auto 10px; max-width: 640px; }
body.scanning .site-head, body.scanning .hero { display: none; }
body.scanning .btn-scan { background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); }
.photo-btn { width: 100%; margin-top: 8px; }
.scan-view { position: relative; border-radius: 12px; overflow: hidden; background: #000; aspect-ratio: 4 / 3; }
.scan-view video { width: 100%; height: 100%; object-fit: cover; display: block; }
.scan-frame { position: absolute; inset: 30% 12%; border: 3px solid #fff; border-radius: 10px; box-shadow: 0 0 0 999px rgba(0, 0, 0, .35); }
.scan-msg { text-align: center; font-size: 14px; color: var(--muted); margin: 8px 0; }
.scan-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

/* 結果 */
.result { padding-top: 6px; }
.product { display: flex; gap: 14px; align-items: center; }
.product img { width: 72px; height: 72px; object-fit: contain; background: #fff; border-radius: 10px; flex: none; }
.product h2 { margin: 0; font-size: 18px; line-height: 1.5; }
.product small { color: var(--muted); font-size: 13px; display: block; }
.settings .set-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.settings label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.settings select, .stepper { border: 1px solid var(--line); background: var(--panel-2); border-radius: 10px; padding: 10px 12px; font-size: 16px; color: var(--ink); }
.stepper { display: flex; align-items: center; padding: 0; overflow: hidden; }
.stepper button { border: 0; background: transparent; width: 44px; height: 44px; font-size: 20px; }
.stepper input { width: 100%; min-width: 0; border: 0; background: transparent; text-align: center; font-size: 16px; -moz-appearance: textfield; }
.stepper input::-webkit-inner-spin-button { -webkit-appearance: none; }
.check { display: flex !important; grid-template-columns: none; gap: 8px; align-items: flex-start; margin-top: 10px; font-size: 14px !important; color: var(--ink) !important; }
.check input { width: 18px; height: 18px; margin-top: 4px; flex: none; accent-color: var(--accent); }
.check.dev { color: var(--gold) !important; }

.summary { border: 2px solid var(--accent); background: var(--accent-soft); }
.summary .big { font-size: 15px; margin: 0; }
.summary .big b { font-size: 26px; color: var(--accent); }
.summary p { margin: 6px 0 0; font-size: 14px; }

.sortbar { display: flex; gap: 6px; margin: 4px 0 12px; overflow-x: auto; }
.sortbar button { flex: 1; min-width: max-content; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 14px; font-weight: 700; color: var(--muted); }
.sortbar button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.shops { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.shop { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.shop.top { border: 2px solid var(--gold); }
.rank { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; flex: none; font-weight: 800; background: var(--panel-2); color: var(--muted); }
.shop.top .rank { background: var(--gold); color: #fff; }
.shop-head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; }
.shop-head h3 { margin: 0; font-size: 18px; }
.tag { font-size: 12px; border-radius: 999px; padding: 1px 8px; border: 1px solid var(--line); color: var(--muted); }
.tag.gold { border-color: var(--gold); color: var(--gold); background: var(--gold-soft); }
.tag.pending { border-style: dashed; border-color: var(--gold); color: var(--gold); }
.money { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; margin: 6px 0 2px; }
.net small, .price small { font-size: 12px; color: var(--muted); margin-right: 4px; }
.net b { font-size: 28px; color: var(--accent); }
.price { color: var(--muted); font-size: 14px; }
.calc { margin: 0; padding: 0; list-style: none; font-size: 13px; color: var(--muted); }
.calc li::before { content: "− "; }
.ease { list-style: none; padding: 0; margin: 10px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
.ease li { font-size: 13px; border-radius: 8px; padding: 6px 10px; background: var(--panel-2); }
.ease li b { display: block; font-size: 11px; color: var(--muted); font-weight: 500; }
.ease .ok { background: var(--good-soft); }
.ease .ok b, .ease .ok { color: var(--good); }
.ease .ng { background: var(--warn-soft); }
.ease .ng b, .ease .ng { color: var(--warn); }
details { margin-top: 10px; font-size: 14px; }
summary { cursor: pointer; color: var(--accent); font-weight: 700; }
details dl { display: grid; grid-template-columns: 7em 1fr; gap: 4px 10px; margin: 8px 0 0; }
details dt { color: var(--muted); }
details dd { margin: 0; }
.go { display: inline-block; margin-top: 12px; font-weight: 700; }
.missing { font-size: 14px; color: var(--muted); }
.missing p { margin: 0 0 6px; }
.note { font-size: 13px; color: var(--muted); margin: 14px 0 28px; }

/* 解説 */
.guide { padding-bottom: 20px; }
.guide h2 { font-size: 19px; margin: 30px 0 10px; padding-left: 10px; border-left: 4px solid var(--accent); }
.steps { padding-left: 1.4em; margin: 0; }
.steps li { margin-bottom: 10px; }
.steps b { display: block; }
.tips { padding-left: 1.2em; margin: 0; }
.tips li { margin-bottom: 6px; }
.formula { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px; font-weight: 700; }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; padding: 18px 0 36px; background: var(--panel); }

@media (max-width: 640px) {
  .hero { padding-top: 22px; }
  .points { grid-template-columns: 1fr; }
  .settings .set-grid { grid-template-columns: 1fr 1fr; }
  .settings .set-grid label:first-child { grid-column: 1 / -1; }
  .rank { width: 28px; height: 28px; font-size: 14px; }
  .ease li { padding: 6px 8px; font-size: 12px; }
  .sortbar button { min-width: 0; padding: 9px 4px; font-size: 13px; }
  details dl { grid-template-columns: 6em 1fr; }
  .net b { font-size: 26px; }
}
.tag.name-match { border-style: dashed; }
.shop-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px; }
.shop-list li { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; font-size: 14px; }