:root {
  --ink: #f3f3f5;
  --muted: #a7a7b2;
  --surface: #111116;
  --surface-2: #18181f;
  --line: #2c2c36;
  --acid: #d7ff3f;
  --acid-soft: rgba(215, 255, 63, .12);
  --black: #09090c;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% -5%, rgba(215,255,63,.11), transparent 28rem),
    var(--black);
  font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.ad-note { padding: 7px 18px; background: var(--acid); color: #17170d; text-align: center; font-size: .78rem; font-weight: 800; letter-spacing: .05em; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(9,9,12,.84); backdrop-filter: blur(14px); position: sticky; top: 0; z-index: 10; }
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { text-decoration: none; display: flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: .02em; }
.brand-mark { display: grid; place-items: center; width: 34px; aspect-ratio: 1; border: 1px solid var(--acid); color: var(--acid); border-radius: 50%; font-family: Georgia, serif; font-style: italic; }
.nav-links { display: flex; gap: 26px; color: var(--muted); font-size: .9rem; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.age { border: 1px solid var(--line); border-radius: 999px; padding: 6px 10px; color: var(--muted); font-size: .72rem; white-space: nowrap; }

.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(36px, 7vw, 96px); align-items: start; padding: clamp(52px, 7vw, 88px) 0 64px; }
.eyebrow { margin: 0 0 18px; color: var(--acid); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1 { margin: 0; max-width: 820px; font-size: clamp(2.65rem, 6.3vw, 6.4rem); line-height: .97; letter-spacing: -.065em; }
.hero h1 em { display: block; color: var(--acid); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.lead { max-width: 660px; margin: 28px 0 0; color: #c2c2ca; font-size: clamp(1rem, 1.5vw, 1.18rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 22px; border-radius: 5px; background: var(--acid); color: #121208; font-weight: 850; text-decoration: none; }
.button.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.button:hover { filter: brightness(.94); }
.product-visual { position: relative; padding: 34px; border: 1px solid var(--line); border-radius: 10px; background: linear-gradient(145deg, #181820, #0d0d12); box-shadow: 0 34px 90px rgba(0,0,0,.36); }
.product-visual::before { content: "EDITOR'S FOCUS 01"; position: absolute; top: 16px; left: 18px; z-index: 1; color: var(--acid); font-size: .66rem; font-weight: 900; letter-spacing: .14em; }
.product-visual { max-width: 560px; justify-self: end; }
.product-visual img { width: 100%; max-height: 540px; aspect-ratio: 1/1; object-fit: contain; mix-blend-mode: screen; }
.caption { margin: 12px 0 0; color: var(--muted); font-size: .7rem; }
.caption a { text-underline-offset: 3px; }

.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.stat { padding: 28px 20px; border-right: 1px solid var(--line); }
.stat:last-child { border: 0; }
.stat strong { display: block; color: var(--acid); font-size: 1.55rem; line-height: 1.2; }
.stat span { color: var(--muted); font-size: .78rem; }

.section { padding: 96px 0; }
.section-head { display: flex; justify-content: space-between; gap: 40px; align-items: end; margin-bottom: 36px; }
.section h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.8rem); line-height: 1.05; letter-spacing: -.045em; }
.section-intro { max-width: 520px; margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 14px; }
.card { padding: 28px; border: 1px solid var(--line); background: var(--surface); border-radius: 7px; text-decoration: none; transition: transform .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-3px); border-color: #565664; }
.card.featured { min-height: 380px; display: flex; flex-direction: column; justify-content: space-between; background: linear-gradient(155deg, var(--acid-soft), var(--surface) 48%); }
.card-index { color: var(--acid); font-family: Georgia, serif; font-size: 2rem; font-style: italic; }
.card h3 { margin: 18px 0 8px; font-size: 1.28rem; line-height: 1.45; }
.card p { margin: 0; color: var(--muted); font-size: .9rem; }
.tag { display: inline-block; margin-top: 22px; color: var(--acid); font-size: .74rem; font-weight: 800; letter-spacing: .05em; }
.card-stack { display: grid; gap: 14px; }

.verdict { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; padding: 44px; background: var(--acid); color: #14140d; border-radius: 8px; }
.verdict h2 { font-size: clamp(2rem, 4vw, 4.1rem); }
.verdict p { margin-top: 0; }
.verdict ul { margin: 20px 0 0; padding-left: 1.3em; }
.verdict .button { background: #111116; color: #fff; margin-top: 24px; }
.fine { font-size: .75rem; opacity: .75; }

.method { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.method > div { padding: 28px; background: var(--black); }
.method strong { color: var(--acid); }

.site-footer { border-top: 1px solid var(--line); padding: 42px 0 60px; color: var(--muted); font-size: .82rem; }
.footer-grid { display: flex; justify-content: space-between; gap: 30px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { text-underline-offset: 3px; }

.article { width: min(calc(100% - 40px), 820px); margin: 0 auto; padding: 84px 0 110px; }
.article.wide { width: min(calc(100% - 40px), 1040px); }
.breadcrumbs { color: var(--muted); font-size: .78rem; margin-bottom: 24px; }
.breadcrumbs a { text-underline-offset: 3px; }
.article h1 { font-size: clamp(2.3rem, 6vw, 4.7rem); line-height: 1.1; }
.article-meta { margin: 22px 0 44px; color: var(--muted); font-size: .82rem; }
.summary-box { margin: 34px 0; padding: 24px; border-left: 4px solid var(--acid); background: var(--surface-2); }
.article h2 { margin: 58px 0 16px; font-size: clamp(1.55rem, 3.4vw, 2.25rem); line-height: 1.3; }
.article h3 { margin: 34px 0 10px; font-size: 1.2rem; }
.article p, .article li { color: #d0d0d6; }
.article table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: .9rem; }
.article th, .article td { padding: 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article th { background: var(--surface-2); }
.notice { margin-top: 50px; padding: 22px; border: 1px solid var(--line); color: var(--muted); font-size: .84rem; }
.toc { display: grid; gap: 8px; margin: 34px 0; padding: 22px 24px; border: 1px solid var(--line); background: rgba(215,255,63,.04); }
.toc strong { color: var(--acid); margin-bottom: 4px; }
.toc a { width: fit-content; color: #d0d0d6; text-underline-offset: 4px; }
.checklist { list-style: none; padding-left: 0; }
.checklist li { position: relative; padding: 9px 0 9px 34px; border-bottom: 1px solid var(--line); }
.checklist li::before { content: "✓"; position: absolute; left: 6px; color: var(--acid); font-weight: 900; }
.warning-box { margin: 26px 0; padding: 24px; border: 1px solid #705950; background: rgba(164,81,52,.1); }
.warning-box strong { color: #ffd0be; }
.warning-box p { margin-bottom: 0; }
.table-scroll { overflow-x: auto; margin: 26px 0; }
.table-scroll table { min-width: 780px; margin: 0; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.topic-card { min-height: 220px; display: flex; flex-direction: column; justify-content: space-between; padding: 26px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); text-decoration: none; }
.topic-card:hover { border-color: var(--acid); }
.topic-card .kicker { color: var(--acid); font-size: .7rem; font-weight: 900; letter-spacing: .12em; }
.topic-card h3 { margin: 20px 0 8px; line-height: 1.35; }
.topic-card p { margin: 0; color: var(--muted); font-size: .87rem; }

@media (max-width: 820px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 58px; }
  .hero h1 { letter-spacing: -.045em; }
  .product-visual { max-width: 570px; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-head, .footer-grid { align-items: start; flex-direction: column; }
  .feature-grid, .verdict, .method, .topic-grid { grid-template-columns: 1fr; }
  .card.featured { min-height: 290px; }
}

@media (max-width: 480px) {
  .wrap, .article { width: min(calc(100% - 28px), var(--max)); }
  .brand { font-size: .9rem; }
  .age { display: none; }
  .hero-actions .button { width: 100%; }
  .product-visual { padding: 22px; }
  .stat { padding: 20px 14px; }
  .verdict { padding: 28px 22px; }
}