:root {
  --ink: #17212b;
  --ink-soft: #44515e;
  --navy: #132b43;
  --navy-deep: #0a1d30;
  --bronze: #b78a42;
  --bronze-pale: #f1e6d2;
  --paper: #f5f3ee;
  --white: #fffefa;
  --line: #d9d4c8;
  --red: #8c3d31;
  --shadow: 0 18px 50px rgba(15, 35, 53, .1);
  font-family: "BIZ UDPGothic", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); line-height: 1.8; }
a { color: #1b557d; text-underline-offset: 4px; }
img { max-width: 100%; }
button, input, select { font: inherit; }
.wrap { width: min(1120px, calc(100% - 32px)); margin-inline: auto; }
.pr-bar { padding: 7px 16px; color: #fff; background: var(--red); text-align: center; font-size: .78rem; font-weight: 800; letter-spacing: .04em; }
.site-header { color: #fff; background: var(--navy-deep); border-bottom: 1px solid rgba(255,255,255,.15); }
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 22px; }
.brand { color: #fff; text-decoration: none; }
.brand strong { display: block; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.32rem; letter-spacing: .08em; }
.brand small { display: block; color: #c8d3dc; font-size: .67rem; letter-spacing: .14em; }
.site-nav { display: flex; gap: 22px; }
.site-nav a { color: #e8eef3; text-decoration: none; font-size: .86rem; font-weight: 700; }

.hero { position: relative; overflow: hidden; color: #fff; background: radial-gradient(circle at 80% 24%, #294d68 0, var(--navy) 35%, var(--navy-deep) 78%); }
.hero::after { content: ""; position: absolute; right: -110px; bottom: -190px; width: 480px; height: 480px; border: 1px solid rgba(183,138,66,.32); border-radius: 50%; box-shadow: 0 0 0 45px rgba(183,138,66,.05), 0 0 0 90px rgba(183,138,66,.04); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); align-items: center; gap: 54px; padding: 72px 0 76px; }
.kicker { margin: 0 0 12px; color: #e1bf81; font-size: .8rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.hero h1, .page-title h1 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; letter-spacing: .035em; line-height: 1.4; }
.hero h1 { max-width: 720px; font-size: clamp(2rem, 4.7vw, 4rem); }
.hero-copy { max-width: 660px; margin: 22px 0 0; color: #dce5ec; font-size: 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 9px 18px; border: 1px solid var(--bronze); border-radius: 3px; color: #102337; background: #e3c790; text-decoration: none; font-weight: 900; }
.button.secondary { color: #fff; background: transparent; border-color: rgba(255,255,255,.38); }
.button.official { width: 100%; color: #fff; background: var(--navy); border-color: var(--navy); }
.check-dial { position: relative; display: grid; place-items: center; width: min(100%, 370px); aspect-ratio: 1; margin-inline: auto; border: 1px solid rgba(226,194,132,.58); border-radius: 50%; box-shadow: inset 0 0 0 20px rgba(255,255,255,.025), inset 0 0 0 21px rgba(226,194,132,.2), 0 24px 45px rgba(0,0,0,.2); }
.check-dial::before, .check-dial::after { content: ""; position: absolute; background: rgba(226,194,132,.28); }
.check-dial::before { width: 1px; height: 84%; }
.check-dial::after { width: 84%; height: 1px; }
.dial-center { position: relative; z-index: 1; display: grid; place-items: center; width: 42%; aspect-ratio: 1; border: 1px solid #d3ae68; border-radius: 50%; color: #ffe2aa; background: #0e263b; text-align: center; font-family: "Yu Mincho", serif; font-weight: 800; }
.dial-label { position: absolute; z-index: 1; color: #edf2f5; font-size: .78rem; font-weight: 800; letter-spacing: .08em; }
.dial-label.top { top: 8%; }.dial-label.right { right: 5%; }.dial-label.bottom { bottom: 8%; }.dial-label.left { left: 5%; }

main { padding: 56px 0 76px; }
.section { margin-bottom: 64px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 22px; }
.section-heading h2 { margin: 0; font-family: "Yu Mincho", serif; font-size: clamp(1.55rem, 3vw, 2.25rem); letter-spacing: .04em; }
.section-heading p { max-width: 560px; margin: 0; color: var(--ink-soft); font-size: .9rem; }
.category-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.category-card { position: relative; min-height: 142px; padding: 20px; overflow: hidden; color: inherit; background: var(--white); border: 1px solid var(--line); box-shadow: 0 8px 22px rgba(20, 40, 57, .05); text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.category-card:hover { transform: translateY(-2px); box-shadow: 0 13px 28px rgba(20, 40, 57, .1); }
.category-card::after { content: ""; position: absolute; right: -28px; bottom: -43px; width: 100px; height: 100px; border: 10px double var(--bronze-pale); border-radius: 50%; }
.category-card h3 { position: relative; z-index: 1; margin: 0 0 5px; font-family: "Yu Mincho", serif; font-size: 1.06rem; }
.category-card p { position: relative; z-index: 1; margin: 0; color: var(--ink-soft); font-size: .85rem; }
.category-count { position: relative; z-index: 1; display: inline-block; margin-top: 13px; color: #78591f; font-weight: 900; }
.steps-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step { padding: 22px 20px; border-right: 1px solid var(--line); }
.step:last-child { border-right: 0; }
.step b { display: block; margin-bottom: 6px; color: var(--bronze); font-size: .74rem; letter-spacing: .1em; }
.step h3 { margin: 0 0 6px; font-size: .98rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: .82rem; }
.feature-card { display: grid; grid-template-columns: minmax(240px, .72fr) minmax(0, 1.28fr); background: var(--navy); color: #fff; box-shadow: var(--shadow); }
.feature-visual { display: grid; place-items: center; min-height: 320px; padding: 30px; background: linear-gradient(145deg, #e5d0a5, #aa7d39); }
.schematic-coin { display: grid; place-items: center; width: min(220px, 85%); aspect-ratio: 1; padding: 18%; border: 9px double #7a571c; border-radius: 50%; color: #4a3514; background: radial-gradient(circle at 34% 25%, #fff5d9, #d6ad64 70%, #936723); text-align: center; font-weight: 900; box-shadow: inset 0 0 0 3px rgba(255,255,255,.55), 0 14px 35px rgba(20,27,33,.23); }
.feature-body { padding: 34px; }
.feature-body h3 { margin: 0 0 12px; font-family: "Yu Mincho", serif; font-size: clamp(1.35rem, 2.6vw, 2rem); line-height: 1.55; }
.feature-body p { color: #dce4ea; }
.note-box, .ad-slot { padding: 22px; border: 1px solid var(--line); background: var(--white); }
.note-box { border-left: 5px solid var(--bronze); }
.note-box h2, .note-box h3 { margin: 0 0 8px; }
.note-box p { margin: 0; color: var(--ink-soft); }
.ad-slot { margin-top: 28px; }
.ad-label { margin: 0 0 7px; color: var(--red); font-size: .72rem; font-weight: 900; letter-spacing: .1em; }
.ad-placeholder { margin: 0; color: var(--ink-soft); }

.breadcrumb { margin-bottom: 20px; color: var(--ink-soft); font-size: .84rem; }
.page-title { margin-bottom: 24px; padding-bottom: 23px; border-bottom: 1px solid var(--line); }
.page-title .kicker { color: #815d20; }
.page-title h1 { max-width: 900px; font-size: clamp(1.8rem, 4vw, 3rem); }
.quick-check { padding: 26px; margin-bottom: 24px; color: #fff; background: var(--navy); border-top: 5px solid var(--bronze); }
.quick-check h2 { margin: 0 0 8px; font-family: "Yu Mincho", serif; }
.quick-check p { margin: 0; color: #e3ebf0; }
.fact-strip { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; margin-top: 20px; background: rgba(255,255,255,.15); }
.fact { padding: 12px 13px; background: #183650; }
.fact dt { color: #b8c9d5; font-size: .7rem; font-weight: 800; }
.fact dd { margin: 2px 0 0; font-weight: 900; }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 24px; align-items: start; }
.detail-layout > * { min-width: 0; }
.content-panel, .side-panel { padding: 26px; margin-bottom: 20px; border: 1px solid var(--line); background: var(--white); box-shadow: 0 9px 26px rgba(20, 40, 57, .05); }
.content-panel h2, .side-panel h2 { margin: 0 0 14px; font-family: "Yu Mincho", serif; font-size: 1.3rem; }
.content-panel p:last-child, .side-panel p:last-child { margin-bottom: 0; }
.compare { border-left: 5px solid #7791a5; }
.identify-steps { margin: 0; padding: 0; list-style: none; counter-reset: identify; }
.identify-steps li { position: relative; padding: 11px 0 11px 46px; border-bottom: 1px solid var(--line); counter-increment: identify; }
.identify-steps li:last-child { border-bottom: 0; }
.identify-steps li::before { content: counter(identify); position: absolute; left: 0; top: 10px; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: #fff; background: var(--navy); font-weight: 900; }
.coin-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.coin-face { display: grid; place-items: center; aspect-ratio: 1; padding: 18%; border: 7px double #9c742f; border-radius: 50%; background: radial-gradient(circle at 32% 25%, #fff6db, #dbb772 68%, #a5762b); color: #453116; text-align: center; font-size: .8rem; font-weight: 900; line-height: 1.5; }
.figure-note { margin: 12px 0 0; color: var(--ink-soft); font-size: .75rem; }
.spec-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.spec-table th, .spec-table td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
.spec-table th { width: 34%; color: var(--ink-soft); font-size: .8rem; }
.source-list { margin: 0; padding-left: 1.2rem; }
.source-list li + li { margin-top: 8px; }
.category-results { display: grid; gap: 14px; margin-bottom: 34px; }
.coin-result { padding: 22px; border: 1px solid var(--line); background: var(--white); box-shadow: 0 8px 24px rgba(20, 40, 57, .05); }
.coin-result h2 { margin: 3px 0 8px; font-family: "Yu Mincho", serif; font-size: 1.28rem; line-height: 1.5; }
.coin-result h2 a { color: var(--ink); }
.coin-result p { margin-bottom: 12px; }
.result-meta { margin: 0; color: #815d20; font-size: .76rem; font-weight: 900; letter-spacing: .05em; }
.coin-result dl { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.coin-result dl div { min-width: 110px; padding: 7px 10px; background: #f1efe8; }
.coin-result dt { color: var(--ink-soft); font-size: .68rem; font-weight: 800; }
.coin-result dd { margin: 0; font-weight: 900; }
.coin-face.gold-tone { background: radial-gradient(circle at 32% 25%, #fff6d2, #d7ad5b 68%, #93651d); }
.coin-face.bicolor { border-color: #80672f; background: radial-gradient(circle, #dad8cf 0 46%, #bc9446 48% 72%, #75551f 74%); }
.site-footer { padding: 34px 0; color: #ccd6de; background: var(--navy-deep); font-size: .78rem; }
.footer-row { display: flex; justify-content: space-between; gap: 30px; }

@media (max-width: 860px) {
  .hero-grid, .feature-card, .detail-layout { grid-template-columns: 1fr; }
  .check-dial { max-width: 330px; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: 0; }
  .step:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .fact-strip { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 560px) {
  .site-nav { display: none; }
  .hero-grid { padding: 50px 0 56px; }
  .hero-actions { display: grid; }
  .category-grid, .steps-grid { grid-template-columns: 1fr; }
  .step, .step:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 8px; }
  .fact-strip { grid-template-columns: 1fr 1fr; }
  .coin-pair { grid-template-columns: 1fr 1fr; }
  .footer-row { display: block; }
}