/* Sakaguchi Architecture Lab — モノトーン基調(黒・白・グレー)に、差し色の金を少しだけ */
:root {
  --bg: #0b0b0c;
  --bg-2: #121214;
  --panel: #16161a;
  --line: #26262b;
  --line-2: #34343a;
  --text: #f3f3f4;
  --muted: #9b9ba3;
  --dim: #6c6c74;
  --gold: #f5c451;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--gold); color: #000; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ヘッダー */
.top { position: sticky; top: 0; z-index: 10; background: rgba(11, 11, 12, 0.78); backdrop-filter: saturate(140%) blur(12px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.02em; font-size: 15px; }
.brand img { width: 34px; height: 37px; }
.nav { margin-left: auto; display: flex; gap: 28px; font-size: 13px; letter-spacing: 0.04em; }
.nav a { color: var(--muted); text-decoration: none; transition: color 0.15s; }
.nav a:hover { color: var(--text); }
.lang { color: var(--muted); font-size: 12px; letter-spacing: 0.08em; text-decoration: none; border: 1px solid var(--line-2); border-radius: 999px; padding: 3px 12px; transition: color 0.15s, border-color 0.15s; }
.lang:hover { color: var(--text); border-color: var(--text); }

/* ヒーロー: 大きな文字と細い線 */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(255, 255, 255, 0.07), transparent 60%),
    linear-gradient(var(--bg), var(--bg));
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
  pointer-events: none;
}
.hero .wrap { position: relative; padding-top: 120px; padding-bottom: 104px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--gold); }
.hero h1 { margin: 28px 0 0; font-size: clamp(34px, 6vw, 72px); line-height: 1.16; letter-spacing: -0.02em; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--text); opacity: 0.55; }
.hero h1 .nb { display: inline-block; }
.hero p.lead { margin: 30px 0 0; max-width: 620px; color: var(--muted); font-size: clamp(15px, 1.5vw, 17px); }
.hero .actions { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 12px; }
.meta { margin: 72px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; list-style: none; }
.meta li { font-size: 14px; color: var(--text); }
.meta span { display: block; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); margin-bottom: 4px; }

/* ボタン */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 14px; letter-spacing: 0.02em; text-decoration: none; transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s; }
.btn:hover { transform: translateY(-1px); }
.btn .arrow { transition: transform 0.15s; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-gold, .btn-dark { background: var(--text); color: #0b0b0c; }
.btn-gold:hover, .btn-dark:hover { background: #fff; }
.btn-ghost, .btn-line, .linkedin { border: 1px solid var(--line-2); color: var(--text); background: transparent; }
.btn-ghost:hover, .btn-line:hover, .linkedin:hover { border-color: var(--text); }

/* セクション共通 */
section { padding: 120px 0; border-bottom: 1px solid var(--line); }
section.soft { background: var(--bg-2); }
.sec-label { display: inline-flex; align-items: center; gap: 12px; font-size: 12px; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); }
.sec-label b { color: var(--gold); font-weight: 600; }
h2 { margin: 14px 0 0; font-size: clamp(28px, 3.6vw, 44px); line-height: 1.25; letter-spacing: -0.02em; font-weight: 800; }
.sec-lead { margin: 18px 0 0; color: var(--muted); max-width: 680px; }

/* プロダクト */
.product { margin-top: 56px; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 28px; padding: 56px; position: relative; overflow: hidden; }
.product::after { content: ""; position: absolute; right: -120px; top: -120px; width: 360px; height: 360px; border-radius: 50%; background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 65%); pointer-events: none; }
.product-head { display: flex; align-items: center; gap: 18px; }
.product-head img { width: 64px; height: 64px; border-radius: 15px; box-shadow: 0 0 0 1px var(--line-2); }
.product-head h3 { margin: 0; font-size: 24px; letter-spacing: -0.01em; }
.product-head .sub { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.product p { color: #cfcfd4; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; padding: 0; list-style: none; }
.tags li { font-size: 12px; letter-spacing: 0.04em; border: 1px solid var(--line-2); border-radius: 999px; padding: 4px 12px; color: var(--muted); }
.product .actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }
.shots { display: flex; gap: 16px; justify-content: center; position: relative; z-index: 1; }
.shots img { width: 46%; max-width: 210px; border-radius: 24px; border: 5px solid #000; box-shadow: 0 0 0 1px var(--line-2), 0 30px 60px rgba(0, 0, 0, 0.55); }
.shots img:last-child { margin-top: 44px; }
.coming { margin-top: 20px; border: 1px dashed var(--line-2); border-radius: 18px; padding: 22px 28px; color: var(--muted); font-size: 14.5px; }
.coming strong { color: var(--text); font-weight: 600; }

/* 考え方 */
.values { margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-2); }
.value { padding: 32px 32px 8px 0; }
.value + .value { padding-left: 32px; border-left: 1px solid var(--line); }
.value .num { font-size: 12px; font-weight: 600; letter-spacing: 0.18em; color: var(--gold); }
.value h3 { margin: 14px 0 0; font-size: 19px; letter-spacing: -0.01em; }
.value p { margin: 10px 0 0; font-size: 14.5px; color: var(--muted); }

/* 運営者 */
.about { margin-top: 56px; display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 64px; align-items: start; }
.about dl { margin: 0; display: grid; grid-template-columns: 7.5em 1fr; font-size: 15px; border-top: 1px solid var(--line-2); }
.about dt, .about dd { padding: 16px 0; border-bottom: 1px solid var(--line); margin: 0; }
.about dt { color: var(--dim); font-size: 13px; letter-spacing: 0.06em; }
.about dd a { text-decoration: none; border-bottom: 1px solid var(--line-2); }
.about dd a:hover { border-color: var(--text); }
.about .bio { margin: 0; color: #cfcfd4; font-size: 16px; }
.about .actions { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }

/* お問い合わせ */
.contact { text-align: left; }
.contact .mail { display: inline-block; margin-top: 30px; font-size: clamp(20px, 3.4vw, 40px); font-weight: 700; letter-spacing: -0.01em; color: var(--text); text-decoration: none; border-bottom: 2px solid var(--gold); padding-bottom: 4px; word-break: break-all; }
.contact .mail:hover { color: #fff; }
.contact .note { margin-top: 16px; color: var(--dim); font-size: 13px; }
.contact .sec-lead { margin-left: 0 !important; }

/* フッター */
footer { padding: 32px 0 40px; font-size: 12.5px; color: var(--dim); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); }
footer .copy { margin-right: auto; letter-spacing: 0.04em; }

@media (max-width: 860px) {
  .nav { display: none; }
  .lang { margin-left: auto; }
  .brand { font-size: 14px; }
  .hero .wrap { padding-top: 80px; padding-bottom: 72px; }
  .meta { grid-template-columns: 1fr; gap: 14px; margin-top: 52px; }
  section { padding: 80px 0; }
  .product { grid-template-columns: 1fr; padding: 28px; gap: 36px; border-radius: 22px; }
  .values { grid-template-columns: 1fr; }
  .value, .value + .value { padding: 26px 0 18px; border-left: 0; border-bottom: 1px solid var(--line); }
  .about { grid-template-columns: 1fr; gap: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .btn .arrow { transition: none; }
}