:root {
  /* 3c「サンド × ネイビー × ライム」 */
  --ground: #F7F4EE;      /* sand */
  --ground-dot: #E2DCCF;
  --paper: #FFFFFF;
  --ink: #1F2638;
  --muted: #656578;
  --navy: #2B3A5C;
  --navy-dark: #1F2A45;
  --lime: #9CCB3B;
  --lime-tint: #D8EDA4;
  --coral: #E86A4A;        /* 朱印, stars, accents (graphics / large text) */
  --coral-ink: #C2502F;    /* coral that carries small white text (4.5:1) */
  --line: #E2DCCF;
  --tint: #EEE9DD;
  --sage: #A7B5AF;
  --coin: #F7D675;
  --coin-edge: #C9A227;
  --up: #3E8E41;
  --on-navy: #FFFFFF;
  --on-navy-soft: rgba(255, 255, 255, .85);
  --on-navy-faint: rgba(255, 255, 255, .3);
  --on-navy-glass: rgba(255, 255, 255, .1);
  --drop: rgba(0, 0, 0, .28);

  /* legacy names (minigames, share cards) mapped onto the palette */
  --red: var(--coral);
  --red-dark: #B9451E;
  --blue: var(--navy);
  --blue-dark: var(--navy-dark);
  --yellow: #FFC531;
  --yellow-dark: #D9A114;
  --green: var(--up);
  --green-dark: #2E6B31;
  --tint-yellow: #FFF2B8;
  --tint-red: #FBE1D9;
  --tint-blue: #DCE3EF;
  --tint-green: var(--lime-tint);
  --tint-purple: #EFE3FF;
  --tint-orange: #FFE8C2;
  --frame: var(--line);

  /* rarity plates (提供割合 marks, the 採用通知 badge): each carries white text at ≥ 4.5:1
     (UR 8.6, SSR 5.3, SR 11.3, R 5.3, N 5.7) — R is a darker green than --up (4.1:1) for that */
  --tier-ur: #5B3A8C;
  --tier-ssr: #B9451E;
  --tier-sr: var(--navy);
  --tier-r: #2F7A33;
  --tier-n: var(--muted);

  --radius-xl: 20px;
  --radius-l: 16px;
  --radius-m: 14px;
  --radius-s: 10px;
  --border: 2px solid var(--navy);
  --border-thick: 3px solid var(--navy);
  --lift: 0 4px 0 var(--navy);
  --lift-s: 0 3px 0 var(--navy);
  --lift-l: 0 6px 0 var(--navy);
  --lift-drop: 0 4px 0 var(--drop);
  --hatch: repeating-linear-gradient(135deg, rgba(255, 255, 255, .12) 0 8px, rgba(255, 255, 255, .03) 8px 16px);
  --marker: linear-gradient(transparent 58%, var(--lime-tint) 58%);

  --font: 'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', 'BIZ UDPGothic', system-ui, sans-serif;
  --fs-caption: 12px;   /* never smaller */
  --fs-small: 13px;
  --fs-body: 15px;
  --fs-lead: 17px;
  --fs-title: 26px;
  --fs-display: 40px;
  --fs-instruction: 44px;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 20px; --space-6: 24px; --space-7: 28px; --space-8: 32px;
  --target: 48px;
  --motion-fast: 80ms;
  --motion-focus: 140ms;
  --motion-page: 200ms;
  --app-max: 1240px;
  --side: 420px;
  /* Claude Design, 2026-10-26: muted country accents and quiet work rows. */
  --work-tint: #F2F4F8;
  --soft-lime: #EEF5DD;
  --country-jp: #5A6FA0; --country-us: #5F7DA6; --country-gb: #7A5E86;
  --country-de: #6F7378; --country-fr: #8C93C2; --country-it: #8EA05A;
  --country-ca: #CF8A58; --country-cn: #A34F60; --country-in: #D49B47; --country-br: #4F9E7E;
}

/* envelope-v2: creative country stationery, scoped to the pack and its letter. */
:root {
  --stationery-navy: var(--navy); --stationery-dark: var(--navy-dark);
  --stationery-seal: var(--red-dark); --stationery-ground: var(--ground); --stationery-tint: var(--tint);
}
.pack[data-country=us], .koufu[data-country=us] {
  --stationery-navy: #243D60;
  --stationery-dark: #172B46;
  --stationery-seal: #A45135;
  --stationery-ground: #F7F5EE;
  --stationery-tint: #E7E5D8;
}
.pack[data-country=cn], .koufu[data-country=cn] {
  --stationery-navy: #553E42;
  --stationery-dark: #38262A;
  --stationery-seal: #AD3E2D;
  --stationery-ground: #FBF5E9;
  --stationery-tint: #EFE1C8;
}
.pack[data-country=de], .koufu[data-country=de] {
  --stationery-navy: #354C49;
  --stationery-dark: #223532;
  --stationery-seal: #885821;
  --stationery-ground: #F3F4ED;
  --stationery-tint: #DEE5DA;
}
.pack[data-country=in], .koufu[data-country=in] {
  --stationery-navy: #35504D;
  --stationery-dark: #233C38;
  --stationery-seal: #925E2F;
  --stationery-ground: #FFF8E9;
  --stationery-tint: #EFE2C6;
}
.pack[data-country=gb], .koufu[data-country=gb] {
  --stationery-navy: #443E5D;
  --stationery-dark: #2B263E;
  --stationery-seal: #954B48;
  --stationery-ground: #F8F4EC;
  --stationery-tint: #E9DFD2;
}
.pack[data-country=fr], .koufu[data-country=fr] {
  --stationery-navy: #38526B;
  --stationery-dark: #233A50;
  --stationery-seal: #A55349;
  --stationery-ground: #FCF8F1;
  --stationery-tint: #ECE2D8;
}
.pack[data-country=it], .koufu[data-country=it] {
  --stationery-navy: #48564B;
  --stationery-dark: #2F3B32;
  --stationery-seal: #995331;
  --stationery-ground: #FBF5E9;
  --stationery-tint: #E9DFC9;
}
.pack[data-country=ca], .koufu[data-country=ca] {
  --stationery-navy: #3B5057;
  --stationery-dark: #273B42;
  --stationery-seal: #964C3E;
  --stationery-ground: #F7F6EF;
  --stationery-tint: #E0E5DE;
}
.pack[data-country=br], .koufu[data-country=br] {
  --stationery-navy: #315C52;
  --stationery-dark: #1D4138;
  --stationery-seal: #875D1E;
  --stationery-ground: #FCF7E8;
  --stationery-tint: #E8E3C7;
}

:root {
  color-scheme: light;
  color: var(--ink);
  background: var(--ground);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background-image: radial-gradient(var(--ground-dot) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
}
a { color: var(--navy); text-underline-offset: .22em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible, input:focus-visible, .table-scroll:focus-visible {
  outline: 3px solid var(--navy);
  outline-offset: 4px;
}
header, main, footer { width: min(100% - 48px, 1120px); margin-inline: auto; min-width: 0; }
header {
  margin-block: 28px 24px;
  padding: 24px 32px 28px;
  border-radius: var(--radius-xl);
  background: var(--hatch), var(--navy);
  color: var(--on-navy);
}
.back {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 6px 16px;
  border: var(--border);
  border-radius: 99px;
  background: var(--paper);
  color: var(--navy);
  font-size: .875rem;
  font-weight: 900;
  text-decoration: none;
}
header .back { min-height: 40px; padding: 4px 14px; border-color: var(--on-navy-faint); background: var(--on-navy-glass); color: var(--on-navy); }
header a:focus-visible { outline-color: var(--on-navy); }
h1 { margin: 18px 0 10px; font-size: clamp(1.65rem, 3.4vw, 2.3rem); font-weight: 900; line-height: 1.4; letter-spacing: .025em; }
h2 { margin: 0 0 20px; font-size: 1.45rem; font-weight: 900; line-height: 1.55; letter-spacing: .02em; }
h3 { margin: 0; font-size: 1.1rem; font-weight: 900; line-height: 1.6; }
.intro { max-width: 48em; margin: 0 0 22px; color: var(--on-navy-soft); font-size: .95rem; line-height: 1.85; }
.country-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.country-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 7px 17px;
  border: 2px solid transparent;
  border-radius: 99px;
  background: var(--paper);
  color: var(--navy);
  font-size: .875rem;
  font-weight: 700;
  text-decoration: none;
}
.country-nav a:hover { background: var(--lime-tint); }
.country-nav a[aria-current] { background: var(--lime); color: var(--ink); font-weight: 900; border-color: var(--lime); }
.guide { padding: 18px 24px 24px; margin-block: 24px; border: var(--border); border-radius: var(--radius-l); background: var(--paper); }
.guide > summary { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; min-height: 48px; cursor: pointer; list-style: none; }
.guide > summary::-webkit-details-marker, .topic > summary::-webkit-details-marker { display: none; }
.guide > summary::before, .topic > summary::before { content: '+'; display: grid; place-items: center; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--tint); color: var(--navy); font-size: 1.1rem; font-weight: 700; line-height: 1; }
.guide[open] > summary::before, .topic[open] > summary::before { content: '−'; background: var(--lime-tint); }
.guide > summary h2 { margin: 0; font-size: 1.1rem; background: var(--marker); }
.guide > summary span { color: var(--muted); font-size: .8125rem; }
.guide[open] > summary { margin-bottom: 16px; }
.guide:not([open]) { padding-block: 12px; }
.guide p { margin: 12px 0; }
.guide dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 20px 0; }
.guide dl > div { padding: 16px; border-radius: var(--radius-s); background: var(--ground); }
.guide dt { margin-bottom: 8px; }
.guide dd { margin: 0; color: var(--muted); font-size: .875rem; }
.badge { display: inline-block; max-width: 100%; padding: 3px 10px; border-radius: 99px; background: var(--tint); color: var(--muted); font-size: .75rem; font-weight: 700; line-height: 1.7; }
.badge.setting { background: var(--tint-orange); color: var(--navy); }
.badge.reference { background: var(--soft-lime); border: 1px solid var(--lime); color: var(--navy); }
.badge.calculated { background: var(--navy); color: var(--on-navy); border: 1px solid var(--navy); }
.search-box { display: block; max-width: 34rem; margin: 26px 0 0; }
.search-box > span { display: inline; font-size: .95rem; font-weight: 900; background: var(--marker); }
.search-box input { display: block; width: 100%; min-height: 52px; margin-top: 10px; padding: 12px 18px; border: var(--border); border-radius: var(--radius-m); background: var(--paper); color: var(--ink); font: inherit; }
.search-box input::placeholder { color: var(--muted); opacity: 1; }
#search-status { margin: 8px 0 14px; }
#search-status:empty { margin-block: 14px; }
.toc { display: flex; flex-wrap: wrap; gap: 4px 24px; padding: 10px 18px; border: 1px solid var(--line); border-radius: var(--radius-m); background: var(--paper); }
.toc a { display: flex; align-items: center; min-height: 48px; font-size: .875rem; font-weight: 700; text-decoration: none; }
.toc a:hover { text-decoration: underline; }
.group { padding-top: 42px; scroll-margin-top: 24px; }
.group > h2 { display: table; background: var(--marker); }
.topic { margin-block: 12px; border: var(--border); border-radius: var(--radius-l); background: var(--paper); overflow: hidden; scroll-margin-top: 24px; }
.topic > summary { display: flex; align-items: center; gap: 14px; min-height: 76px; padding: 18px 22px; cursor: pointer; list-style: none; }
.topic > summary h3 { flex: 1; min-width: 0; }
.topic > summary .badge { flex: none; }
.topic > summary:hover { background: var(--ground); }
.topic > summary:focus-visible { outline-offset: -5px; border-radius: var(--radius-m); }
.topic[open] > summary { background: var(--ground); border-bottom: 1px solid var(--line); }
.topic-body { padding: 8px 24px 24px; }
.topic-body > p { max-width: 56em; }
.topic-body > p:first-child { margin-top: 12px; }
.context { padding: 12px 16px; border-left: 3px solid var(--lime); border-radius: 0 var(--radius-s) var(--radius-s) 0; background: var(--ground); color: var(--muted); font-size: .875rem; }
.data-table { margin-top: 24px; }
.table-title { margin: 0 0 10px; font-size: .95rem; font-weight: 900; }
.table-scroll { max-width: 100%; max-height: 36rem; overflow: auto; border: 1px solid var(--line); border-radius: var(--radius-s); overscroll-behavior-inline: contain; scrollbar-color: var(--sage) var(--ground); scrollbar-width: thin; }
.table-scroll table { width: 100%; border-collapse: collapse; font-size: .875rem; line-height: 1.7; }
th, td { min-width: 5rem; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; text-align: left; overflow-wrap: anywhere; }
th { min-width: 6rem; background: var(--navy); color: var(--on-navy); font-weight: 700; white-space: normal; }
.table-scroll thead th { position: sticky; top: 0; z-index: 1; }
td.number { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; font-weight: 700; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:nth-child(even) { background: var(--ground); }
.table-scroll a { white-space: nowrap; }
.source-links { margin: 22px 0 0; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: .8125rem; }
.source-links a { display: inline-block; min-height: 32px; padding-top: 4px; margin-right: .55em; }
.reference-list { padding: 10px 26px 10px 50px; border: var(--border); border-radius: var(--radius-l); background: var(--paper); }
.reference-list li { padding: 18px 8px; border-bottom: 1px solid var(--line); scroll-margin-top: 24px; font-size: .9375rem; }
.reference-list li:last-child { border: 0; }
.reference-list li::marker { color: var(--muted); font-size: .875rem; font-weight: 700; }
.reference-list li:target { background: var(--lime-tint); border-radius: 8px; }
.reference-list span { display: block; margin-top: 4px; color: var(--muted); font-size: .8125rem; }
.empty-search { padding: 18px 22px; border: 1px solid var(--line); border-radius: var(--radius-m); background: var(--paper); }
.quiet { color: var(--muted); font-size: .875rem; }
[hidden] { display: none !important; }
footer { margin-top: 48px; padding: 24px 0 44px; border-top: 1px solid var(--line); }
footer .back:hover { background: var(--lime-tint); }
@media (max-width: 640px) {
  header, main, footer { width: calc(100% - 24px); }
  header { margin-top: 12px; padding: 18px 18px 22px; border-radius: var(--radius-l); }
  h1 { margin-top: 16px; }
  h2 { font-size: 1.25rem; }
  .intro { font-size: .875rem; }
  .country-nav { gap: 7px; }
  .country-nav a { padding: 7px 12px; font-size: .8125rem; }
  .guide { padding: 16px; margin-block: 18px; }
  .guide > summary { gap: 10px; }
  .guide > summary span { flex-basis: 100%; padding-left: 38px; }
  .guide dl { grid-template-columns: 1fr; }
  .toc { gap: 2px 18px; padding: 8px 14px; }
  .group { padding-top: 30px; }
  .topic > summary { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 6px 10px; padding: 14px; }
  .topic > summary::before { grid-row: 1 / 3; width: 26px; height: 26px; }
  .topic > summary h3 { font-size: 1rem; }
  .topic > summary .badge { grid-column: 2; justify-self: start; }
  .topic-body { padding: 6px 14px 20px; }
  th, td { padding: 10px 12px; }
  .reference-list { padding: 6px 14px 6px 38px; }
}
@media print {
  body { background: var(--paper); }
  header, main, footer { width: 100%; }
  header { background: var(--paper); color: var(--ink); border: var(--border); }
  header .intro { color: var(--muted); }
  .search-box, .country-nav, .back, #search-status { display: none; }
  .topic { break-inside: avoid; }
  .table-scroll { overflow: visible; max-height: none; }
  .table-scroll thead th { position: static; }
}

.source-caution { max-width: 75em; margin: 0 0 20px; color: var(--muted); font-size: .8125rem; line-height: 1.85; }