/* Layout: sticky header + four full-width bands (TOP / SERVICE / COMPANY / RECRUIT), content capped at 1080px, CAD-grid motif in the hero */
/* 今のホームページと同じ明るい配色だけで作る（ダーク表示にはしない） */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --band: #f4f7fb;       /* 区画の背景（今のサイトの淡い青グレー） */
  --ink: #333333;        /* 今のサイトの文字色 */
  --muted: #666666;
  --line: #d3d3d3;       /* 今のサイトの罫線色 */
  --brand: #1e2272;      /* ロゴの紺 */
  --brand-soft: #e9eef5; /* 今のサイトの淡い青 */
  --sky: #288bd7;        /* 今のサイトの青 */
  --accent: #d0001a;     /* ロゴの赤。差し色にだけ使う */
  --grid: rgba(40, 139, 215, .08);
  --font-display: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Consolas", monospace;
  --header-h: 64px;
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; line-height: 1.4; margin: 0; }
p { margin: 0; }

.wrap {
  max-width: 1080px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}


/* ヘッダー */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--surface); }
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.logo-mark { display: block; height: 26px; width: auto; flex: none; }
.logo-name { font-size: 13px; font-weight: 500; letter-spacing: .08em; white-space: nowrap; color: var(--ink); }
@media (max-width: 420px) { .logo-mark { height: 20px; } .logo-name { font-size: 11px; letter-spacing: .04em; } }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.nav a {
  display: block; padding: 8px 14px; border-radius: 4px; text-decoration: none;
  color: var(--ink); font-size: 14px; font-weight: 500; letter-spacing: .06em;
}
.nav a:hover { background: var(--brand-soft); }
.nav a.is-active { color: var(--brand); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }
.menu-btn { display: none; background: none; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); width: 44px; height: 40px; font-size: 20px; cursor: pointer; }

@media (max-width: 760px) {
  .menu-btn { display: block; }
  .nav { position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--line); }
  .nav[hidden] { display: none !important; }
  .nav ul { flex-direction: column; gap: 0; padding-block: 8px;
    padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
  .nav a { padding: 14px 8px; border-bottom: 1px solid var(--line); }
  .nav li:last-child a { border-bottom: 0; }
}
@media (min-width: 761px) { .nav[hidden] { display: block !important; } }

/* セクション共通 */
section, #access { scroll-margin-top: calc(var(--header-h) + env(safe-area-inset-top, 0px)); }
.band { padding-block: 88px; }
.band.alt { background: var(--band); border-block: 1px solid var(--line); }
.sec-head { display: grid; gap: 6px; margin-bottom: 44px; }
.sec-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .2em; color: var(--accent); text-transform: uppercase; }
.sec-title { font-size: clamp(26px, 4vw, 34px); font-weight: 700; letter-spacing: .06em; }
.lead { color: var(--muted); max-width: 40em; }

/* ヒーロー（CAD方眼） */
.hero {
  position: relative; overflow: hidden; padding-block: 96px 88px;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}
.hero .wrap { display: grid; }
.hero-copy { display: grid; gap: 28px; min-width: 0; }
.hero h1 { word-break: keep-all; overflow-wrap: anywhere; font-size: clamp(30px, 5vw, 50px); font-weight: 900; letter-spacing: .04em; line-height: 1.35; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero-en { font-family: var(--font-mono); font-size: 13px; color: var(--muted); letter-spacing: .04em; line-height: 1.7; }
.hero-text { max-width: 40em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 4px; text-decoration: none; font-weight: 700; font-size: 15px; letter-spacing: .06em; }
.btn-primary { background: var(--brand); color: var(--bg); }
.btn-ghost { border: 1px solid var(--brand); color: var(--brand); background: var(--surface); }
@media (max-width: 760px) {
  .hero { padding-block: 56px; }
  }

/* 事業内容 */
.division { display: grid; gap: 20px; }
.division + .division { margin-top: 56px; }
.division-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.division-head h3 { font-size: 22px; font-weight: 700; letter-spacing: .05em; }
.division-head span { font-family: var(--font-mono); font-size: 12px; color: var(--muted); letter-spacing: .08em; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.card { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 20px; align-items: start; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 24px; }
.card img { width: 120px; height: 120px; object-fit: cover; border-radius: 4px; display: block; }
.card h4 { font-family: var(--font-display); font-size: 18px; margin: 0 0 8px; letter-spacing: .04em; color: var(--brand); }
.card p { font-size: 15px; color: var(--ink); }
.card p + p { margin-top: 8px; }
.card .more { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 700; }
@media (max-width: 420px) {
  .card { grid-template-columns: 1fr; }
  .card img { width: 100%; height: 160px; }
}

/* 会社概要 */
.philosophy { background: var(--brand-soft); border-left: 4px solid var(--brand); padding: 28px 32px; border-radius: 0 6px 6px 0; display: grid; gap: 12px; margin-bottom: 56px; }
.philosophy h3 { font-size: 15px; letter-spacing: .12em; color: var(--brand); }
.philosophy p.main { font-family: var(--font-display); font-size: clamp(17px, 2.2vw, 21px); font-weight: 700; line-height: 1.8; }
.philosophy p.note { font-size: 13px; color: var(--muted); }
.company-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 48px; }
@media (max-width: 860px) { .company-grid { grid-template-columns: 1fr; } }
.sub-title { font-size: 18px; font-weight: 700; letter-spacing: .06em; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.sub-title::before { content: ""; width: 10px; height: 10px; background: var(--accent); }
.spec { margin: 0; display: grid; grid-template-columns: 7.5em minmax(0, 1fr); border-top: 1px solid var(--line); }
.spec dt, .spec dd { margin: 0; padding: 14px 4px; border-bottom: 1px solid var(--line); font-size: 15px; }
.spec dt { color: var(--muted); font-weight: 500; }
.spec dd { font-variant-numeric: tabular-nums; }
.timeline { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--line); display: grid; gap: 20px; }
.timeline li { position: relative; padding-left: 22px; }
.timeline li::before { content: ""; position: absolute; left: -7px; top: 9px; width: 12px; height: 12px; border-radius: 50%; background: var(--surface); border: 2px solid var(--brand); }
.timeline time { display: block; font-family: var(--font-mono); font-size: 13px; color: var(--brand); letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.timeline p { font-size: 15px; }
.access { margin-top: 48px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: stretch; }
@media (max-width: 760px) { .access { grid-template-columns: 1fr; } }
.access-info { display: grid; gap: 10px; align-content: start; }
.access-info ul { margin: 0; padding-left: 1.2em; }
.map { border: 1px solid var(--line); border-radius: 6px; overflow: hidden; min-height: 260px; }
.map iframe { display: block; width: 100%; height: 100%; min-height: 260px; border: 0; }

/* 採用情報 */
.recruit-lead { display: grid; gap: 6px; margin-bottom: 36px; }
.recruit-lead p:first-child { font-family: var(--font-display); font-size: clamp(20px, 3vw, 26px); font-weight: 700; letter-spacing: .04em; }
.recruit-lead p:last-child { color: var(--muted); }
.jobs { display: flex; flex-wrap: wrap; gap: 10px; }
.job { display: inline-block; padding: 4px 14px; border: 1px solid var(--brand); border-radius: 999px; color: var(--brand); font-weight: 700; font-size: 14px; }
.recruit-box { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 8px 32px; }
@media (max-width: 560px) {
  .recruit-box { padding: 4px 16px; }
  .spec { grid-template-columns: 1fr; }
  .spec dt { border-bottom: 0; padding-bottom: 0; }
}
.apply { margin-top: 32px; display: grid; gap: 8px; padding: 24px 28px; border-radius: 6px; background: var(--brand-soft); }
.apply strong { font-family: var(--font-display); color: var(--brand); font-size: 17px; }

/* フッター */
.site-footer { background: var(--brand-soft); color: var(--ink); padding-block: 48px 28px; border-top: 4px solid var(--sky); }
.site-footer .wrap { display: grid; gap: 28px; }
.foot-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; }
.foot-info { font-size: 14px; line-height: 1.9; }
.foot-info .logo { margin-bottom: 4px; }
.foot-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 22px; }
.foot-nav a { color: var(--brand); font-size: 14px; text-decoration: none; }
.foot-nav a:hover { text-decoration: underline; }
.copy { font-family: var(--font-mono); font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 20px; }

.to-top {
  position: fixed; right: calc(16px + env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  width: 44px; height: 44px; border-radius: 50%; background: var(--brand); color: var(--bg);
  display: grid; place-items: center; text-decoration: none; font-size: 18px; z-index: 15;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}