/* ボドゲ管理太郎の HP（v581・docs/design_domain.md）。アプリと同じ紺・金・クリームの一揃い。
   字は端末の丸ゴシック（iPhone・Mac のヒラギノ丸ゴ）。外のフォントは読まない（よそへ通信しない） */
:root{
  --ground:#0b1638;--ground2:#101f4d;--panel:#14245a;--line:rgba(246,234,214,.14);
  --text:#f6ead6;--muted:#c9bfae;--gold:#e0b36e;--gold-ink:#0b1638;--wine:#8a1538;
  --radius:22px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--text);
  font-family:"Hiragino Maru Gothic ProN","Hiragino Maru Gothic Pro","Zen Maru Gothic","Kosugi Maru","Hiragino Sans","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;
  font-size:17px;line-height:1.8;letter-spacing:.02em}
img{max-width:100%;height:auto;display:block}
a{color:var(--gold)}
a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:8px}
.wrap{max-width:1080px;margin:0 auto;padding-inline:20px}

/* 頭 */
.top{position:sticky;top:0;z-index:5;background:rgba(11,22,56,.88);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.top .logo img{height:34px;width:auto}
.top nav{display:flex;align-items:center;gap:18px;font-size:15px}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover{color:var(--text)}
.top nav a.open{color:var(--gold-ink);background:var(--gold);padding:8px 16px;border-radius:999px;font-weight:700}
@media (max-width:640px){ .top nav a:not(.open){display:none} }

/* ボタン */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-weight:700;border-radius:999px;padding:14px 28px;font-size:18px}
.btn.primary{background:var(--gold);color:var(--gold-ink);box-shadow:0 10px 26px rgba(224,179,110,.25)}
.btn.ghost{border:1.5px solid var(--line);color:var(--text)}
.btns{display:flex;flex-wrap:wrap;gap:12px}

/* 冒頭 */
.hero{position:relative;overflow:hidden;background:
   radial-gradient(700px 520px at 100% 80%,rgba(138,21,56,.55),transparent 62%),
   radial-gradient(600px 420px at 0% 0%,rgba(224,179,110,.14),transparent 60%),
   linear-gradient(170deg,#0f1e4c,#0a1230 75%)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;padding-block:64px 40px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--gold);font-weight:700;font-size:15px;letter-spacing:.08em}
.eyebrow::before{content:"";width:28px;height:3px;border-radius:2px;background:var(--gold)}
.hero h1{font-size:clamp(34px,6vw,58px);line-height:1.25;margin:14px 0 18px;letter-spacing:.01em;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p.lead{color:var(--muted);margin:0 0 26px;max-width:32em}
.hero .note{color:var(--muted);font-size:14px;margin-top:14px}
.phones{position:relative;height:540px}
.phone{position:absolute;width:250px;border-radius:38px;padding:9px;background:linear-gradient(145deg,#2a3150,#05080f 30%,#05080f 75%,#1c2240);box-shadow:0 30px 60px rgba(0,0,0,.55)}
.phone img{border-radius:30px;width:100%}
.phones .a{left:4%;top:40px;transform:rotate(-5deg)}
.phones .b{right:2%;top:0;transform:rotate(4deg)}
@media (max-width:820px){
  .hero .wrap{grid-template-columns:1fr;padding-block:40px 24px}
  .phones{height:min(400px,100vw);max-width:440px;width:100%;margin:0 auto}
  .phone{width:min(210px,49%)}
  .phones .a{left:0;top:30px} .phones .b{right:0}
}

/* 節 */
section{padding-block:64px}
section h2{font-size:clamp(26px,4vw,36px);line-height:1.35;margin:0 0 10px;text-wrap:balance}
section .sub{color:var(--muted);margin:0 0 36px;max-width:36em}
.feature{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:center;padding-block:28px;border-top:1px solid var(--line)}
.feature:first-of-type{border-top:0}
.feature .shot{border-radius:30px;overflow:hidden;padding:8px;background:#05080f;box-shadow:0 20px 44px rgba(0,0,0,.45)}
.feature .shot img{border-radius:23px}
.feature .shot.square{border-radius:18px;padding:6px;background:var(--text)}
.feature .shot.square img{border-radius:12px}
.feature h3{font-size:24px;margin:0 0 8px;line-height:1.45}
.feature h3 small{display:block;color:var(--gold);font-size:14px;letter-spacing:.08em;margin-bottom:4px}
.feature p{margin:0;color:var(--muted)}
@media (max-width:720px){ .feature{grid-template-columns:1fr;gap:20px} .feature .shot{max-width:280px} }

.promise{background:var(--ground2)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card h3{margin:0 0 6px;font-size:19px}
.card p{margin:0;color:var(--muted);font-size:15px}
@media (max-width:820px){ .cards{grid-template-columns:1fr} }

.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;list-style:none;padding:0;margin:0}
.steps li{counter-increment:step;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.steps li::before{content:counter(step);display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--gold);color:var(--gold-ink);font-weight:700;margin-bottom:10px}
.steps h3{margin:0 0 6px;font-size:19px}
.steps p{margin:0;color:var(--muted);font-size:15px}
@media (max-width:820px){ .steps{grid-template-columns:1fr} }

.cta{text-align:center;background:
   radial-gradient(600px 300px at 50% 120%,rgba(138,21,56,.5),transparent 70%),var(--ground)}
.cta .btns{justify-content:center}

/* 文書の頁（規約・ポリシー・更新履歴・質問） */
.doc{max-width:760px;padding-block:48px 72px}
.doc h1{font-size:clamp(28px,5vw,40px);line-height:1.35;margin:0 0 8px}
.doc .meta{color:var(--muted);font-size:14px;margin:0 0 32px}
.doc h2{font-size:20px;margin:36px 0 8px;line-height:1.5}
.doc p{margin:0 0 12px}
.doc .entry{border-top:1px solid var(--line);padding-top:20px;margin-top:20px}
.doc .entry .ver{color:var(--gold);font-size:13px;letter-spacing:.06em}
.doc .entry h2{margin-top:4px}
.doc details{border-top:1px solid var(--line);padding:16px 0}
.doc summary{cursor:pointer;font-weight:700;font-size:18px;line-height:1.6}
.doc details p{color:var(--muted);margin:10px 0 0}
.doc .more{margin-top:24px}

/* 足 */
.foot{border-top:1px solid var(--line);padding-block:36px;color:var(--muted);font-size:14px}
.foot .wrap{display:flex;flex-wrap:wrap;gap:20px 32px;justify-content:space-between;align-items:flex-start}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 20px}
.foot nav a{color:var(--muted)}
.foot .contact a{color:var(--text)}
/* インラインの style は HP の CSP（style-src 'self'）で効かない。ここへ置く（v588・デフの release-v584 回答 申し送り1） */
.foot-logo{height:30px;width:auto;margin-bottom:10px}
section .sub.after-steps{margin:24px 0 0}
.cta .sub{margin-inline:auto}

@media (prefers-reduced-motion:reduce){ *{scroll-behavior:auto!important} }