/* 参考：Proximo「東京ガス株式会社」実績ページ。白地・濃いグレーの文字・薄いグレーのタグ・細い線・広い余白・左見出し右本文 */
:root {
  --ink: #303030;
  --sub: #6f6f6f;
  --mute: #9a9a9a;
  --line: #e6e6e6;
  --chip: #f6f6f6;
  --canvas: #f2f2f2;
  --bg: #ffffff;
  --accent: #1f4e9c;
  --accent-soft: #eef3fb;
  --warn: #b4232a;
  --warn-soft: #fdf1f1;
  --ok: #2f6f4f;
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  --radius: 4px;
  --gutter: 16px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; color: inherit; letter-spacing: inherit; }
[hidden] { display: none !important; }

/* ヘッダー */
.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 14px var(--gutter);
  padding-top: max(14px, env(safe-area-inset-top));
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid transparent;
}
.bar.scrolled { border-bottom-color: var(--line); }
.brand {
  font-weight: 600; font-size: 17px; text-decoration: none; color: var(--ink);
  letter-spacing: 0.06em; white-space: nowrap;
}
.brand span { margin-left: 8px; font-size: 11px; font-weight: 400; color: var(--sub); }
.nav { display: flex; gap: 4px; }
.nav button {
  background: none; border: 0; padding: 6px 8px; font-size: 13px; color: var(--ink); cursor: pointer;
  border-bottom: 1px solid transparent;
}
.nav button.on { border-bottom-color: var(--ink); }

main { max-width: 1040px; margin: 0 auto; padding: 0 var(--gutter) 40px; }

/* ヒーロー */
.hero { display: grid; gap: 24px; padding: 32px 0 40px; }
.hero h1 { font-size: 24px; font-weight: 600; line-height: 1.5; margin: 0 0 12px; letter-spacing: 0.06em; }
.lead { color: var(--sub); font-size: 14px; margin: 0 0 14px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.tags li { background: var(--chip); color: var(--sub); font-size: 12px; border-radius: var(--radius); padding: 2px 6px; }
.hero-panel {
  border: 1px solid var(--line);
  display: grid; place-items: center;
  min-height: 220px; padding: 24px;
}
.mini-receipt { width: 100%; max-width: 280px; text-align: center; }
.mr-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--sub); border-bottom: 1px dashed var(--line); padding-bottom: 6px; }
.mr-arrow { color: var(--mute); margin: 8px 0; }
.mr-big { font-size: 14px; }
.mr-big b { font-size: 40px; font-weight: 500; letter-spacing: 0.02em; margin: 0 2px; color: var(--accent); }
.mr-big small { font-size: 12px; color: var(--sub); }
.mr-sub { font-size: 12px; color: var(--sub); margin-top: 4px; }

/* 左見出し・右本文のブロック */
.block { display: grid; gap: 12px; padding: 28px 0; border-top: 1px solid var(--line); }
.block-h { font-size: 16px; font-weight: 400; margin: 0; }
.block-b { min-width: 0; }
.note { color: var(--sub); font-size: 12px; margin: 10px 0 0; }

.choice { display: flex; flex-wrap: wrap; gap: 8px; }
.choice button {
  border: 1px solid var(--line); background: var(--bg); border-radius: var(--radius);
  padding: 8px 12px; font-size: 14px; cursor: pointer;
}
.choice button.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.choice button small { display: block; font-size: 11px; color: var(--sub); }

.shoot { display: grid; gap: 10px; }
.shoot-btn {
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; cursor: pointer; background: var(--bg);
  transition: border-color .15s, background .15s;
}
.shoot-btn:active { transform: scale(.99); }
.shoot-btn.primary { border-color: var(--accent); }
.shoot-btn b { display: block; font-weight: 600; font-size: 15px; }
.shoot-btn small { display: block; color: var(--sub); font-size: 12px; }
.shoot-ic { font-size: 22px; width: 36px; text-align: center; }
.samples { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 4px; }
.link { background: none; border: 0; padding: 4px 0; color: var(--accent); font-size: 13px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

/* ページ見出し */
.page-head { padding: 28px 0 20px; }
.page-head h1 { font-size: 22px; font-weight: 600; margin: 0 0 8px; letter-spacing: 0.06em; }
.step { font-size: 11px; color: var(--mute); letter-spacing: 0.12em; margin: 0 0 4px; }

/* 読み取り結果 */
.read-meta { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 13px; color: var(--sub); padding: 12px 0; border-top: 1px solid var(--line); }
.read-meta b { color: var(--ink); font-weight: 500; }
.items { display: grid; gap: 10px; }
.item {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 14px;
  display: grid; gap: 10px; background: var(--bg);
}
.item.excluded { background: var(--canvas); opacity: .7; }
.item-top { display: flex; gap: 8px; align-items: flex-start; }
.item-top input.name { flex: 1; font-weight: 600; }
.fields { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.f { display: grid; gap: 2px; font-size: 11px; color: var(--sub); }
.f input, .f select, .item-top input {
  width: 100%; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px 10px; background: var(--bg); color: var(--ink); font-size: 15px; min-height: 40px;
}
.f input:focus, .f select:focus, .item-top input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.low input, .low select, input.low { background: var(--warn-soft); border-color: #f0c9cb; }
.item-foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.item-unit { font-size: 12px; color: var(--sub); }
.item-unit b { color: var(--ink); font-weight: 500; }
.chip-warn { display: inline-block; font-size: 11px; color: var(--warn); background: var(--warn-soft); border-radius: var(--radius); padding: 1px 6px; }
.row-actions { margin-top: 12px; }

button.primary, .primary.wide {
  background: var(--ink); color: #fff; border: 0; border-radius: var(--radius);
  padding: 12px 18px; font-weight: 600; cursor: pointer; min-height: 44px;
}
button.primary:active { opacity: .85; }
button.ghost, button.mini {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px 12px; cursor: pointer; font-size: 13px; min-height: 36px;
}
button.mini { padding: 4px 8px; font-size: 12px; min-height: 30px; color: var(--sub); }
.wide { width: 100%; margin-top: 16px; }

/* 計算 */
.calc-grid { display: grid; gap: 20px; }
.calc-form { display: grid; gap: 0; }
.cf-row { display: grid; gap: 8px; padding: 16px 0; border-top: 1px solid var(--line); }
.cf-row:last-child { border-bottom: 1px solid var(--line); }
.cf-label { font-size: 14px; }
.cf-label small { display: block; color: var(--sub); font-size: 11px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; flex-wrap: wrap; }
.seg button { border: 0; background: var(--bg); padding: 8px 12px; font-size: 13px; cursor: pointer; border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--ink); color: #fff; }
.num { display: flex; align-items: center; gap: 8px; }
.num input { width: 120px; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 10px; font-size: 16px; min-height: 40px; }
.num span { color: var(--sub); font-size: 13px; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; }
.presets button { border: 1px solid var(--line); background: var(--bg); border-radius: 999px; padding: 3px 10px; font-size: 12px; color: var(--sub); cursor: pointer; }
.presets button.on { border-color: var(--accent); color: var(--accent); }

.result {
  background: var(--canvas); border-radius: var(--radius); padding: 24px 20px; align-self: start;
}
.result-label { margin: 0; font-size: 12px; color: var(--sub); }
.price { margin: 0; font-size: 56px; font-weight: 500; letter-spacing: 0.01em; line-height: 1.2; color: var(--accent); font-variant-numeric: tabular-nums; }
.price small { font-size: 16px; color: var(--sub); margin-left: 4px; }
.price-edit { display: flex; gap: 6px; margin: 8px 0 16px; }
.price-edit input { flex: 1; min-width: 0; text-align: center; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px; font-size: 16px; background: var(--bg); }
.pm { width: 44px; border: 1px solid var(--line); background: var(--bg); border-radius: var(--radius); font-size: 18px; cursor: pointer; }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0; border-top: 1px solid #dcdcdc; }
.kv div { padding: 10px 0; border-bottom: 1px solid #dcdcdc; }
.kv dt { font-size: 11px; color: var(--sub); }
.kv dd { margin: 0; font-size: 18px; font-variant-numeric: tabular-nums; }
.warn { color: var(--warn); font-size: 13px; background: var(--warn-soft); padding: 8px 10px; border-radius: var(--radius); margin: 12px 0 0; }
.how { margin-top: 14px; font-size: 13px; }
.how summary { cursor: pointer; color: var(--sub); }
.how ol { padding-left: 20px; margin: 8px 0 0; color: var(--sub); }
.how li { margin-bottom: 4px; }

.sticky-sum {
  position: fixed; left: 12px; right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); z-index: 20;
  display: flex; align-items: baseline; gap: 10px; justify-content: center;
  background: var(--ink); color: #fff; text-decoration: none; border-radius: var(--radius);
  padding: 10px 14px; font-size: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.12);
}
.sticky-sum b { font-size: 22px; font-weight: 500; font-variant-numeric: tabular-nums; }
@media (min-width: 768px) { .sticky-sum { display: none !important; } }

/* 一覧 */
.menu-row { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; padding: 14px 0; border-top: 1px solid var(--line); align-items: center; }
.menu-row:last-child { border-bottom: 1px solid var(--line); }
.menu-name { font-weight: 600; }
.menu-meta { font-size: 12px; color: var(--sub); grid-column: 1; }
.menu-price { font-size: 22px; color: var(--accent); grid-row: 1 / span 2; grid-column: 2; text-align: right; font-variant-numeric: tabular-nums; }
.menu-price small { font-size: 12px; color: var(--sub); }
.menu-actions { grid-column: 1 / -1; display: flex; gap: 6px; }
.empty { color: var(--sub); font-size: 14px; padding: 24px 0; border-top: 1px solid var(--line); }

/* 読み込み中・お知らせ */
.loading { position: fixed; inset: 0; background: rgba(255,255,255,.9); display: grid; place-content: center; justify-items: center; z-index: 50; color: var(--sub); }
.spinner { width: 28px; height: 28px; border: 2px solid var(--line); border-top-color: var(--ink); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.toast { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 16px; border-radius: var(--radius); font-size: 13px; z-index: 60; max-width: calc(100% - 32px); }

.foot { border-top: 1px solid var(--line); padding: 24px var(--gutter) max(24px, env(safe-area-inset-bottom)); color: var(--sub); font-size: 11px; text-align: center; }
.foot p { margin: 0 0 4px; }
.foot-brand { color: var(--ink); letter-spacing: 0.08em; }

/* 広い画面：左に見出し、右に本文（参考ページの2段組み） */
@media (min-width: 768px) {
  :root { --gutter: 40px; }
  .bar { padding-left: 40px; padding-right: 40px; }
  .nav { gap: 20px; }
  .nav button { font-size: 14px; }
  .hero { grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: center; padding: 56px 0 64px; }
  .hero h1 { font-size: 30px; }
  .block { grid-template-columns: 300px 1fr; gap: 40px; padding: 40px 0; }
  .shoot { grid-template-columns: 1fr 1fr; }
  .fields { grid-template-columns: repeat(6, 1fr); }
  .fields .f.wide2 { grid-column: span 2; }
  .calc-grid { grid-template-columns: 1fr 380px; gap: 40px; }
  .cf-row { grid-template-columns: 200px 1fr; align-items: center; gap: 20px; }
  .result { position: sticky; top: 80px; }
}

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