:root {
  --ink: #111a30;
  --muted: #647084;
  --line: #dfe3eb;
  --paper: #f4f5f8;
  --indigo: #293a8f;
  --rose: #d94d72;
  --gold: #d5a43a;
  --night: #111b39;
  --radius: 2px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Sans JP", "Yu Gothic", system-ui, sans-serif;
  background: #fff;
  line-height: 1.75;
}
a { color: inherit; }
.wrap { width: min(1180px, calc(100% - 48px)); margin: auto; }
.skip-link { position: fixed; z-index: 100; top: -60px; left: 16px; padding: 10px 16px; color: #fff; background: var(--night); }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(17, 26, 48, .12);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(16px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 86px; }
.brand { display: inline-flex; flex-direction: column; text-decoration: none; line-height: 1; }
.brand b { font-size: 25px; letter-spacing: -.05em; }
.brand small { margin-top: 8px; color: var(--indigo); font-size: 9px; font-weight: 800; letter-spacing: .2em; }
nav { display: flex; align-items: center; gap: 30px; }
nav a, nav button { font: inherit; font-size: 13px; text-decoration: none; border: 0; background: none; cursor: pointer; }
.site-header nav a { display: flex; flex-direction: column; line-height: 1.2; }
.site-header nav a span { margin-bottom: 5px; color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.site-header .nav-cta { flex-direction: row; align-items: center; gap: 22px; padding: 13px 18px; color: #fff; background: var(--night); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 112px 0 98px;
  background:
    linear-gradient(90deg, rgba(255,255,255,.98) 0 52%, rgba(255,255,255,.58)),
    radial-gradient(circle at 84% 28%, rgba(217,77,114,.23), transparent 23%),
    radial-gradient(circle at 74% 65%, rgba(41,58,143,.25), transparent 32%),
    #f1f2f7;
}
.hero::after {
  position: absolute;
  right: -3vw;
  bottom: -13vw;
  content: "MUSO";
  color: rgba(41, 58, 143, .045);
  font-size: 25vw;
  font-weight: 900;
  letter-spacing: -.08em;
  line-height: 1;
}
.eyebrow { color: var(--indigo); font-size: 11px; font-weight: 850; letter-spacing: .2em; }
.hero h1, .page-hero h1 { position: relative; z-index: 1; max-width: 900px; margin: .3em 0; font-size: clamp(46px, 7vw, 84px); line-height: 1.08; letter-spacing: -.06em; }
.hero h1 em { color: var(--rose); font-style: normal; }
.hero p, .page-hero p { position: relative; z-index: 1; max-width: 680px; color: var(--muted); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; min-width: 160px; padding: 13px 19px; color: #fff; font-weight: 750; text-decoration: none; background: var(--night); }
.button:hover { background: var(--indigo); }
.button.secondary { color: var(--ink); border: 1px solid var(--line); background: #fff; }
.text-link { color: var(--ink); font-weight: 750; text-decoration: none; border-bottom: 1px solid currentColor; }

.section { padding: 92px 0; }
.section.alt { background: var(--paper); }
.section h2 { margin: 0 0 12px; font-size: clamp(32px, 4vw, 52px); line-height: 1.2; letter-spacing: -.05em; }
.lead { max-width: 760px; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 38px; }
.card { position: relative; padding: 38px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.product-card:nth-child(1) { border-top: 4px solid var(--gold); }
.product-card:nth-child(2) { border-top: 4px solid var(--indigo); }
.card h3 { margin: 8px 0 10px; font-size: 29px; letter-spacing: -.03em; }
.card p { color: var(--muted); }
.tag { display: inline-block; color: var(--indigo); font-size: 10px; font-weight: 850; letter-spacing: .18em; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 36px; background: var(--line); }
.fact { padding: 30px; background: #fff; }
.fact strong { display: block; margin-bottom: 10px; font-size: 20px; }

.columns-section { color: #fff; background: var(--night); }
.columns-section .eyebrow { color: #9fb2ff; }
.columns-section .lead, .columns-section .column-card p { color: #bac3d8; }
.column-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 34px; }
.column-card { padding: 32px; color: var(--ink); border: 1px solid var(--line); background: #fff; }
.columns-section .column-card { color: #fff; border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.06); }
.column-card > span { color: var(--rose); font-size: 10px; font-weight: 850; letter-spacing: .18em; }
.column-card h3 { margin: 10px 0; font-size: 25px; line-height: 1.4; letter-spacing: -.03em; }
.column-card p { color: var(--muted); }
.column-card a { display: inline-flex; gap: 30px; margin-top: 14px; font-weight: 800; text-decoration: none; border-bottom: 1px solid currentColor; }

.page-hero { padding: 78px 0 60px; border-bottom: 1px solid var(--line); background: var(--paper); }
.page-hero h1 { font-size: clamp(40px, 6vw, 68px); }
.content { width: min(900px, calc(100% - 48px)); margin: auto; padding: 68px 0 90px; }
.content section { padding: 30px 0; border-bottom: 1px solid var(--line); }
.content h2 { font-size: 29px; letter-spacing: -.03em; }
.content li { margin: .45em 0; }
.content .column-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.notice { padding: 22px 25px; border-left: 4px solid var(--rose); background: #fbf3f5; }

.site-footer { padding: 64px 0 34px; color: #dce3f4; background: #0d1630; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; }
.site-footer .brand b { color: #fff; }
.site-footer a, .site-footer button { color: #dce3f4; }
.site-footer nav { align-items: flex-start; flex-direction: column; gap: 9px; }
.site-footer nav strong { margin-bottom: 8px; color: #fff; font-size: 11px; letter-spacing: .16em; }
.developer-link { display: inline-block; margin-top: 12px; font-size: 13px; text-decoration: none; border-bottom: 1px solid #7481a0; }
.copyright { margin-top: 42px; padding-top: 22px; color: #8490ac; font-size: 12px; border-top: 1px solid rgba(255,255,255,.1); }

.cookie { position: fixed; z-index: 50; right: 18px; bottom: 18px; left: 18px; display: none; align-items: center; justify-content: space-between; gap: 25px; max-width: 900px; margin: auto; padding: 22px 24px; border: 1px solid var(--line); background: #fff; box-shadow: 0 20px 60px rgba(13,35,68,.25); }
.cookie.show { display: flex; }
.cookie h2 { margin: 0; font-size: 19px; }
.cookie p { max-width: 620px; margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.cookie-actions { display: flex; gap: 9px; }
.cookie button { min-width: 100px; padding: 10px 14px; font-weight: 750; border: 1px solid var(--indigo); background: #fff; cursor: pointer; }
.cookie .accept { color: #fff; background: var(--indigo); }

@media (max-width: 760px) {
  .wrap, .content { width: min(100% - 30px, 1180px); }
  .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .site-header nav { gap: 17px; overflow-x: auto; width: 100%; padding-top: 14px; }
  .site-header .nav-cta { padding: 9px 12px; }
  .hero { padding: 72px 0; }
  .hero::after { display: none; }
  .cards, .facts, .column-grid, .content .column-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 62px 0; }
  .card, .column-card { padding: 26px; }
  .cookie { align-items: stretch; flex-direction: column; }
  .cookie-actions button { flex: 1; }
}