:root {
  --bg: #fff;
  --ink: #111;
  --muted: #666;
  --line: #e2e2e2;
  --soft: #f5f4f2;
  --accent: #000;
  --on-accent: #fff;
  --danger: #b3261e;
  --ok: #1d6b3a;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Prompt, "Sukhumvit Set", Thonburi, sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.5;
}
.brand { text-align: center; padding: 24px 16px 8px; }
.brand img { display: block; margin: 0 auto 6px; height: auto; }
.brand p { margin: 0; color: var(--muted); font-size: 14px; }
main { max-width: 480px; margin: 0 auto; padding: 8px 16px calc(32px + env(safe-area-inset-bottom)); }
h1 { font-size: 24px; font-weight: 400; margin: 12px 0 16px; }
.category { font-size: 13px; font-weight: 400; color: var(--muted); margin: 24px 0 10px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.steps { display: flex; gap: 4px; margin: 8px 0 4px; }
.steps span { flex: 1; height: 3px; background: var(--line); }
.steps span.on { background: var(--accent); }
.back { background: none; border: 0; padding: 8px 0; font: inherit; font-size: 14px; color: var(--muted); cursor: pointer; }
.option {
  display: block; width: 100%; text-align: left; background: var(--bg); color: var(--ink);
  border: 1px solid var(--line); padding: 14px 16px; margin-bottom: 10px; font: inherit; cursor: pointer; min-height: 48px;
}
.option:hover, .option:focus-visible { border-color: var(--accent); }
.option strong { display: block; font-weight: 400; }
.option small { color: var(--muted); font-size: 13px; }
.days { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 8px; }
.day {
  background: var(--bg); color: var(--ink); border: 1px solid var(--line); padding: 8px 2px; font: inherit;
  font-size: 13px; text-align: center; cursor: pointer; min-height: 56px;
}
.day b { display: block; font-size: 17px; font-weight: 400; }
.day[disabled] { color: #aaa; background: var(--soft); cursor: not-allowed; }
.day.on, .slot.on { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.pager { display: flex; justify-content: space-between; margin-bottom: 16px; }
.pager button { background: none; border: 0; font: inherit; font-size: 14px; color: var(--ink); padding: 8px 0; cursor: pointer; }
.pager button[disabled] { color: #bbb; cursor: default; }
.slots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.slot { background: var(--bg); color: var(--ink); border: 1px solid var(--line); padding: 12px 0; font: inherit; cursor: pointer; }
label { display: block; font-size: 14px; margin: 14px 0 4px; }
input, textarea {
  width: 100%; border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  padding: 12px; font: inherit; font-size: 16px; border-radius: 0;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.btn {
  display: block; width: 100%; background: var(--accent); color: var(--on-accent); border: 0; padding: 15px;
  font: inherit; font-weight: 400; letter-spacing: .03em; margin-top: 20px; cursor: pointer; text-align: center; text-decoration: none;
}
.btn[disabled] { opacity: .5; cursor: wait; }
.btn.ghost { background: var(--bg); color: var(--ink); border: 1px solid var(--ink); }
.summary { background: var(--soft); padding: 14px 16px; margin: 16px 0; font-size: 14px; }
.summary div { display: flex; justify-content: space-between; gap: 16px; padding: 3px 0; }
.summary span:first-child { color: var(--muted); flex-shrink: 0; }
.summary span:last-child { text-align: right; }
.error { color: var(--danger); font-size: 14px; margin-top: 12px; }
.qr { display: block; width: min(280px, 100%); margin: 12px auto; border: 1px solid var(--line); background: #fff; }
.count { font-size: 22px; text-align: center; margin: 4px 0; font-variant-numeric: tabular-nums; }
.done { color: var(--ok); }
.demo { background: #fff4d6; padding: 8px 12px; font-size: 13px; margin-bottom: 12px; }
.check { display: flex; gap: 8px; align-items: flex-start; }
.check input { width: 18px; height: 18px; flex-shrink: 0; margin: 2px 0 0; }
.summary .btn { margin-top: 12px; }
.loginline { background: none; border: 0; padding: 6px 0 14px; font: inherit; font-size: 13px; color: var(--muted); text-decoration: underline; cursor: pointer; }