/* style.css */
:root{
  --bg: #f6f2ea;        /* ベージュ */
  --paper: #fbf8f2;     /* もう少し明るい紙色 */
  --ink: #2a2a2a;       /* 文字 */
  --muted: #6b6b6b;     /* 補助文字 */
  --line: rgba(42,42,42,.10);
  --accent: #2f6f6a;    /* ほんのり青緑（差し色） */
  --shadow: 0 10px 30px rgba(0,0,0,.06);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  color:var(--ink);
  background:
    radial-gradient(1200px 800px at 15% 10%, rgba(47,111,106,.10), transparent 60%),
    radial-gradient(900px 700px at 90% 15%, rgba(0,0,0,.06), transparent 55%),
    linear-gradient(0deg, var(--bg), var(--bg));
  font-family: system-ui, -apple-system, "Noto Sans JP", "Hiragino Kaku Gothic ProN",
               "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
}

.wrap{
  width:min(980px, 92vw);
  margin:0 auto;
}

.hero{
  padding: 56px 0 28px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--ink);
}

.brand-mark{
  width:34px; height:34px;
  display:grid; place-items:center;
  border:1px solid var(--line);
  background: rgba(251,248,242,.65);
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0,0,0,.05);
}

.brand-name{
  font-weight: 650;
  letter-spacing: .02em;
}

.headline{
  margin: 18px 0 8px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  letter-spacing: .01em;
}

.sub{
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 46em;
}

.cta{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 10px 0 18px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(251,248,242,.65);
  color: var(--ink);
  text-decoration:none;
  box-shadow: 0 10px 24px rgba(0,0,0,.05);
  transition: transform .06s ease, filter .18s ease;
}
.btn:hover{ filter: brightness(0.98); transform: translateY(-1px); }

.btn.primary{
  background: linear-gradient(135deg, rgba(47,111,106,.15), rgba(47,111,106,.08));
  border-color: rgba(47,111,106,.25);
}

.chips{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.chip{
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(251,248,242,.70);
  color: rgba(42,42,42,.85);
}

.card{
  background: rgba(251,248,242,.70);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.card h2{
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: .02em;
}

.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.links a{
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.links a:hover{ text-decoration: underline; }

.muted{ color: var(--muted); font-size: 13px; margin: 10px 0 0; }

.footer{
  display:flex;
  gap: 10px;
  align-items:center;
  justify-content:center;
  color: rgba(42,42,42,.70);
  padding: 26px 0 40px;
  font-size: 13px;
}
.footer a{ color: rgba(42,42,42,.70); text-decoration:none; }
.footer a:hover{ text-decoration: underline; }
.dot{ opacity:.5; }

.br{ display:none; }

@media (max-width: 780px){
  .grid{ grid-template-columns: 1fr; }
  .br{ display:inline; }
}