:root {
  --brand: #f28a2c;
  --brand-dark: #d96f12;
  --text: #1f2328;
  --muted: #59636e;
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #e2e5e9;
}
@media (prefers-color-scheme: dark) {
  :root { --text: #e6edf3; --muted: #9198a1; --bg: #0d1117; --surface: #161b22; --border: #30363d; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--brand-dark); }
.container { max-width: 880px; margin: 0 auto; padding: 0 20px; }

header.site { border-bottom: 1px solid var(--border); }
header.site .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
header.site .logo { font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none; letter-spacing: 0.02em; }
header.site .logo span { color: var(--brand); }
header.site nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 0.95rem; }

.hero { padding: 72px 0 56px; }
.hero h1 { font-size: 2rem; line-height: 1.4; margin: 0 0 16px; }
.nb { display: inline-block; }  /* 句読点の直後でだけ折り返させる */
.hero p { color: var(--muted); margin: 0; max-width: 640px; }

section { padding: 40px 0; }
section h2 { font-size: 1.3rem; margin: 0 0 20px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card {
  display: flex; gap: 16px; align-items: center;
  padding: 20px; border: 1px solid var(--border); border-radius: 16px;
  background: var(--surface); color: var(--text); text-decoration: none;
}
.card:hover { border-color: var(--brand); }
.card img { width: 72px; height: 72px; border-radius: 16px; }
.card .name { font-weight: 700; }
.card .desc { color: var(--muted); font-size: 0.9rem; }

.app-head { display: flex; gap: 24px; align-items: center; padding: 56px 0 24px; }
.app-head img { width: 112px; height: 112px; border-radius: 24px; }
.app-head h1 { margin: 0; font-size: 1.6rem; line-height: 1.4; }
.app-head p { margin: 4px 0 0; color: var(--muted); }
.badge {
  display: inline-block; margin-top: 12px; padding: 8px 18px; border-radius: 999px;
  background: var(--brand); color: #fff; text-decoration: none; font-weight: 700; font-size: 0.95rem;
}
.badge.disabled { background: var(--border); color: var(--muted); }
ul.features { padding-left: 1.2em; }
ul.links { list-style: none; padding: 0; }
ul.links li { margin: 6px 0; }

footer.site { border-top: 1px solid var(--border); margin-top: 48px; padding: 24px 0 40px; color: var(--muted); font-size: 0.85rem; }
footer.site a { color: var(--muted); }

/* サポートページ */
.faq-app { display: flex; align-items: center; gap: 10px; font-size: 1rem; margin: 8px 0 12px; }
.faq-app img { width: 28px; height: 28px; border-radius: 7px; }
details { border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 8px 0; background: var(--surface); }
details summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 0; }
.note { color: var(--muted); font-size: 0.85rem; }

.form { display: grid; gap: 18px; max-width: 560px; }
.form label { display: grid; gap: 6px; font-weight: 600; font-size: 0.95rem; }
.form fieldset { border: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.form legend { font-weight: 600; font-size: 0.95rem; margin-bottom: 6px; }
.form .radio { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.form input[type=text], .form input[type=email], .form select, .form textarea {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; width: 100%;
}
.form textarea { resize: vertical; }
.form button { border: none; cursor: pointer; justify-self: start; }
.form button:disabled { opacity: 0.6; cursor: default; }
.form-result.ok { color: #1a7f37; }
.form-result.error { color: #cf222e; }

@media (max-width: 480px) { .hero h1 { font-size: 1.55rem; } }

/* プライバシーポリシー */
.policy { max-width: 720px; padding-top: 48px; }
.policy h1 { font-size: 1.6rem; margin: 0 0 8px; }
.policy h2 { font-size: 1.15rem; margin: 2em 0 0.6em; padding-bottom: 4px; border-bottom: 1px solid var(--border); }
.policy ul { padding-left: 1.4em; }
.policy li > ul { margin: 4px 0; }