:root {
  color-scheme: light;
  --sky-top: #cfe8f7;
  --sky-bottom: #eaf5fb;
  --paper: #ffffff;
  --paper-alt: #f4f8fb;
  --ink: #1f2a37;
  --ink-soft: #4b5a6b;
  --line: #d9e3ec;
  --accent: #f0a63a;
  --accent-ink: #8a5a0f;
  --link: #1f5fa8;
  --town-1: #8fb3c9;
  --town-2: #6f93aa;
  --town-3: #4f7390;
  --town-ink: #456a86;
  --max: 1040px;
  --band-max: 1440px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic Medium", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
.hero-title, .hero-sub, .section-title, h3 { font-feature-settings: "palt"; }
[id] { scroll-margin-top: 72px; }

a { color: var(--link); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; box-shadow: 0 0 0 6px var(--accent); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 6px; z-index: 100;
}
.skip:focus { left: 8px; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 16px; }
.brand { display: inline-flex; align-items: flex-end; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-logo { display: block; height: 34px; width: auto; }
.brand-llc { font-size: .8rem; font-weight: 600; color: var(--ink-soft); letter-spacing: .14em; line-height: 1; margin-bottom: 1px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.nav { display: flex; gap: 18px; font-size: .95rem; }
.nav a { color: var(--ink); text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--accent); }

/* hero */
.hero {
  position: relative;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-bottom) 100%);
  overflow: hidden;
}
.hero-inner { padding: 56px 16px 28px; max-width: 900px; margin-left: auto; margin-right: auto; text-align: center; }
.hero-kicker { margin: 0 0 8px; font-size: .9rem; letter-spacing: .12em; color: var(--ink-soft); }
.hero-title {
  margin: 0; font-size: clamp(1.25rem, 4.6vw, 2.8rem); line-height: 1.3; letter-spacing: .02em; font-weight: 800; white-space: nowrap;
}
.hero-lead { margin: 22px auto 0; max-width: 620px; color: var(--ink-soft); }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 26px 0 0; }

.btn {
  display: inline-block; padding: 10px 20px; border-radius: 999px; text-decoration: none; font-weight: 600;
  border: 2px solid transparent; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-ghost { background: rgba(255,255,255,.7); color: var(--ink); border-color: var(--ink); }

/* skyline band（街の絵は 1796x592。幅に合わせて高さが決まる。広い画面では 1440px で止めて中央に置く） */
.skyline { position: relative; aspect-ratio: 1796 / 592; max-width: var(--band-max); margin: 0 auto; }
.skyline-canvas { display: block; width: 100%; height: auto; image-rendering: pixelated; image-rendering: crisp-edges; }
.skyline-fallback {
  position: absolute; inset: 0; display: none;
  background: url("img/city.png?v=20261018f") bottom center / 100% auto no-repeat;
  image-rendering: pixelated;
}
.no-js .skyline-fallback { display: block; }
.no-js .skyline-canvas { display: none; }

/* sections */
.section { padding: 64px 0; }
.section-alt { background: var(--paper-alt); }
.section-title {
  margin: 0 0 12px; font-size: 1.6rem; letter-spacing: .04em;
  display: inline-flex; align-items: center; gap: 12px;
}
.section-title::before { content: ""; width: 10px; height: 28px; border-radius: 3px; background: var(--accent); }
.section-lead { margin: 0 0 28px; color: var(--ink-soft); }

.cards { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 22px 22px 18px;
  box-shadow: 0 2px 0 var(--line);
}
.card-tag { margin: 0 0 6px; font-size: .8rem; letter-spacing: .1em; color: var(--accent-ink); font-weight: 700; }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0 0 8px; }

.values { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin: 20px 0 36px; }
.value h3 { margin: 0 0 6px; font-size: .95rem; letter-spacing: .12em; color: var(--accent-ink); }
.value p { margin: 0; font-weight: 600; }
.value-list { margin: 0; }
.value-list div { display: grid; grid-template-columns: 64px 1fr; gap: 8px; margin: 0 0 6px; }
.value-list dt { font-weight: 700; color: var(--town-ink); }
.value-list dd { margin: 0; font-size: .95rem; }

.company { max-width: 760px; }
.company h3 { margin: 0 0 8px; font-size: 1.1rem; }
.company-list { margin: 0; }
.company-list div { display: grid; grid-template-columns: 96px 1fr; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.company-list dt { color: var(--ink-soft); font-size: .9rem; }
.company-list dd { margin: 0; }

/* sub pages（privacy.html, contact.html） */
.page { padding: 48px 0 72px; }
.page-title { margin: 0 0 12px; font-size: 1.8rem; letter-spacing: .03em; font-feature-settings: "palt"; }
.doc-lead { margin: 0 0 24px; color: var(--ink-soft); }
.doc { max-width: 800px; }
.doc-narrow { max-width: 720px; }
.doc-toc { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0 0 40px; padding: 12px 16px; background: var(--paper-alt); border-radius: 10px; font-size: .95rem; }
.doc-section { margin: 0 0 56px; }
.doc-section h2, .doc-section h3 { margin: 28px 0 8px; font-size: 1.05rem; }
.doc-section p, .doc-section ul, .doc-section ol { margin: 0 0 12px; }
.doc-section li { margin: 0 0 4px; }
.doc-meta { color: var(--ink-soft); font-size: .95rem; text-align: right; }
.doc-list { margin: 0 0 12px; }
.doc-list div { display: grid; grid-template-columns: 96px 1fr; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.doc-list dt { color: var(--ink-soft); font-size: .9rem; }
.doc-list dd { margin: 0; }
.consent-list { margin: 0 0 24px; border-top: 1px solid var(--line); }
.consent-list div { display: grid; grid-template-columns: 160px 1fr; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.consent-list dt { font-weight: 700; font-size: .95rem; }
.consent-list dd { margin: 0; }
.contact-actions { margin: 20px 0 16px; text-align: center; }
.consent-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 28px 0 12px; }
.btn.is-disabled { opacity: .45; cursor: not-allowed; }
.consent-note { margin: 0; color: var(--ink-soft); font-size: .95rem; text-align: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.footer-copy { margin-left: auto; flex: 1 0 auto; text-align: right; }
.footer-links a { color: var(--ink-soft); }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--paper-alt); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 20px 16px; font-size: .85rem; color: var(--ink-soft); }
.footer-inner p { margin: 0; }

/* 899px 以下は skyline.js が街を拡大して描く（高さ = 幅 × 1184/1796、上限 297px）。画像の読み込み前から同じ高さを確保し、本文が後からずれないようにする */
@media (max-width: 899px) {
  .skyline { aspect-ratio: auto; height: min(calc(100vw * 1184 / 1796), 297px); }
  .skyline-fallback { background-size: auto 100%; }
}

@media (max-width: 600px) {
  .site-header { position: static; }
  .header-inner { flex-wrap: wrap; padding-top: 8px; padding-bottom: 6px; min-height: 0; }
  .brand-logo { height: 28px; }
  .brand-llc { display: none; }
  .nav { width: 100%; justify-content: space-between; gap: 8px; font-size: .9rem; }
  .nav a { white-space: nowrap; padding: 8px 4px; }
  .doc-list div, .consent-list div { grid-template-columns: 1fr; gap: 2px; }
  [id] { scroll-margin-top: 12px; }
  .hero-inner { padding-top: 40px; }
  .section { padding: 48px 0; }
  .company-list div { grid-template-columns: 1fr; gap: 0; }
}