/* reserve.css — independent, mobile-first */

:root{
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;

  --primary: #0f766e;
  --primary-weak: #e7f6f4;

  --shadow: 0 6px 18px rgba(0,0,0,.06);
  --radius: 16px;
  --container: 960px;
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a{ color: inherit; text-decoration: none; }

.container{
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-header{
  position: sticky;
  top: 0;
  background: rgba(246,247,249,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 12px;
}

.brand__name{ font-weight: 700; letter-spacing: .02em; }
.brand__sub{ font-size: 12px; color: var(--muted); margin-top: 2px; }

.hero{
  padding: 22px 0 10px;
}

.badge{
  display: inline-block;
  background: #fee2e2;
  color: #991b1b;
  font-weight: 700;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
}

h1{
  font-size: 24px;
  line-height: 1.2;
  margin: 10px 0 10px;
}

.lead{
  margin: 0 0 14px;
  color: #111827;
}

.info-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 14px 0 10px;
}

.card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px;
  box-shadow: var(--shadow);
}

.card h2{
  font-size: 16px;
  margin: 0 0 8px;
}

.big{
  font-size: 16px;
  margin: 0 0 8px;
}

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

.list{
  margin: 0;
  padding-left: 18px;
  color: #111827;
}
.list li{ margin: 6px 0; }

.cta{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 14px 0 0;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.btn--primary{
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow);
}

.btn--secondary{
  background: var(--primary-weak);
  color: var(--primary);
  border-color: #bfe9e4;
}

.btn--ghost{
  background: transparent;
  color: var(--text);
  border-color: var(--line);
  height: 40px;
  padding: 0 10px;
}

.section{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin: 14px 0;
  box-shadow: var(--shadow);
}

.section h2{
  font-size: 18px;
  margin: 0 0 8px;
}

.qa{
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fff;
  margin: 10px 0;
}

.qa summary{
  cursor: pointer;
  font-weight: 700;
}

.qa__body{
  margin-top: 10px;
  color: #111827;
}

.site-footer{
  margin: 18px 0 28px;
  color: var(--muted);
}

.footer-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.footer-title{ font-weight: 700; color: var(--text); }
.footer-actions{ display: flex; gap: 10px; flex-wrap: wrap; }

copyright{ display:none; }
.copyright{
  font-size: 12px;
  padding-top: 8px;
}

/* Tablet+ */
@media (min-width: 768px){
  h1{ font-size: 32px; }
  .info-grid{ grid-template-columns: 1fr 1fr; }
  .cta{ grid-template-columns: 1fr 1fr; }
  .footer-grid{ grid-template-columns: 1fr auto; align-items: center; }
}