:root {
  --bg: #f3efe6;
  --bg-2: #e7e0d2;
  --ink: #1c2420;
  --muted: #5d6a63;
  --line: #c9c0b0;
  --accent: #1f6f5b;
  --accent-2: #0f3f34;
  --danger: #8b2e2e;
  --ok: #1f5b3a;
  --card: rgba(255, 252, 246, 0.92);
  --shadow: 0 18px 40px rgba(28, 36, 32, 0.08);
  --radius: 18px;
  --font: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  --display: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #dfe9e2 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #efe4d2 0%, transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  min-height: 100vh;
  line-height: 1.55;
}

a { color: var(--accent-2); }
.wrap { width: min(920px, calc(100% - 2rem)); margin: 0 auto; }
.muted { color: var(--muted); }
.brand, .brand-mark {
  font-family: var(--display);
  letter-spacing: 0.04em;
}

.public-shell {
  width: min(720px, calc(100% - 1.5rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}
.public-header { margin-bottom: 1.5rem; }
.public-header .brand-mark {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
  color: var(--accent-2);
}
.public-header h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 600;
}
.lede { margin: 0.6rem 0 0; color: var(--muted); max-width: 32em; }

.calendar-panel, .day-panel, .panel, .auth-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.15rem 1.25rem;
  margin-bottom: 1rem;
}

.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.cal-nav h2 {
  margin: 0;
  font-size: 1.15rem;
  font-family: var(--display);
}

.weekday-row, .month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
}
.weekday-row {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}
.day-cell {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 12px;
  min-height: 3.1rem;
  padding: 0.35rem 0.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0.2rem;
  cursor: pointer;
  color: inherit;
  font: inherit;
}
.day-cell:disabled { opacity: 0.35; cursor: default; }
.day-cell .num { font-weight: 600; font-size: 0.95rem; }
.day-cell.busy { background: rgba(31, 111, 91, 0.12); border-color: rgba(31, 111, 91, 0.25); }
.day-cell.selected { outline: 2px solid var(--accent); background: rgba(31, 111, 91, 0.18); }
.day-cell.today .num { color: var(--accent); }
.dot {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--accent);
}

.status-banner {
  margin-bottom: 0.8rem;
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  background: #f7e8c8;
  color: #5a4418;
  font-size: 0.92rem;
}
.status-banner.error { background: #f3d9d9; color: #6d2525; }
.status-banner.ok { display: none; }

.slot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}
.slot-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 12px;
  background: rgba(31, 111, 91, 0.08);
  border: 1px solid rgba(31, 111, 91, 0.16);
}
.slot-list .time {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.slot-list .label { color: var(--muted); font-size: 0.92rem; }

.public-footer {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fffdf8;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font: inherit;
  cursor: pointer;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #f7fff9;
}
.btn.danger {
  background: #fff;
  border-color: #d7a3a3;
  color: var(--danger);
}
.btn.ghost { background: transparent; }
.btn.small { padding: 0.3rem 0.7rem; font-size: 0.85rem; }
.btn:hover { filter: brightness(0.98); }

.admin-top {
  border-bottom: 1px solid var(--line);
  background: rgba(255,252,246,0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.admin-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 0;
}
.admin-top .brand {
  text-decoration: none;
  color: var(--accent-2);
  font-size: 1.15rem;
}
.admin main.wrap, body.admin .wrap { padding-bottom: 3rem; }
.admin-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin: 1.4rem 0 1rem;
}
.admin-head h1, .panel h2, .auth-card h1 {
  font-family: var(--display);
  margin: 0 0 0.35rem;
}
.stack { display: grid; gap: 0.85rem; margin-top: 0.8rem; }
.stack.narrow { max-width: 360px; }
label { display: grid; gap: 0.35rem; font-size: 0.92rem; }
input[type="text"], input[type="password"], input[type="email"], input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  background: #fff;
}
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.8rem;
}
.kv { display: grid; gap: 0.45rem; margin: 0; }
.kv > div { display: grid; grid-template-columns: 7rem 1fr; gap: 0.5rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.code-block {
  display: block;
  overflow-x: auto;
  background: #1c2420;
  color: #e8f2ec;
  padding: 0.8rem 0.9rem;
  border-radius: 12px;
  font-size: 0.82rem;
  margin: 0.6rem 0 1rem;
}
.check-list { list-style: none; padding: 0; margin: 0.8rem 0; display: grid; gap: 0.45rem; }
.check-list label { display: flex; gap: 0.55rem; align-items: center; grid-template-columns: none; }
.check-list .provider {
  display: inline-block;
  min-width: 3.6rem;
  font-size: 0.75rem;
  color: var(--accent-2);
  text-transform: uppercase;
}
.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin-top: 0.8rem; }
.table th, .table td { border-bottom: 1px solid var(--line); padding: 0.55rem 0.35rem; text-align: left; vertical-align: top; }
.table.compact { font-size: 0.82rem; }
.alert {
  padding: 0.8rem 0.95rem;
  border-radius: 12px;
  margin: 1rem 0;
}
.alert.success { background: #dff0e5; color: var(--ok); }
.alert.error { background: #f3d9d9; color: var(--danger); }
.auth-card { width: min(420px, calc(100% - 2rem)); margin: 3rem auto; }

@media (max-width: 560px) {
  .day-cell { min-height: 2.7rem; }
  .kv > div { grid-template-columns: 1fr; }
  .admin-head { flex-direction: column; }
}