:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #101828;
  --muted: #667085;
  --line: #eaecf0;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --accent-text: #3730a3;
  --danger: #b42318;
  --radius: 14px;
  color-scheme: light; /* always bright, even if the visitor's device is in dark mode */
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 "Segoe UI", system-ui, -apple-system, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px;
}
.demo-banner {
  background: #fffaeb; color: #93370d; border: 1px solid #fedf89;
  padding: 8px 14px; border-radius: 10px; margin-bottom: 16px; font-size: 13px;
}
.card {
  width: 100%;
  max-width: 1040px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(16, 24, 40, .06);
  display: grid;
  grid-template-columns: 280px 1fr;
  overflow: hidden;
}
.intro { padding: 28px; border-right: 1px solid var(--line); }
.logo { display: block; width: 100%; max-width: 220px; height: auto; margin: 0 0 24px; }
.eyebrow { margin: 0; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }
.intro h1 { margin: 4px 0 4px; font-size: 24px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.facts { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 10px; color: var(--muted); }
.facts li { display: flex; gap: 10px; align-items: flex-start; }
.icon { width: 20px; text-align: center; }
.summary {
  background: var(--accent-soft); color: var(--accent-text);
  border-radius: 10px; padding: 12px 14px; font-weight: 600;
}

.step { padding: 28px; }
#step-pick { display: grid; grid-template-columns: 1fr 240px; gap: 28px; }
#step-pick[hidden], .step[hidden] { display: none; }

.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-head h2 { margin: 0; font-size: 17px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line);
  background: transparent; color: var(--text); font-size: 20px; cursor: pointer;
}
.icon-btn:disabled { opacity: .3; cursor: default; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow span { text-align: center; font-size: 12px; color: var(--muted); padding-bottom: 4px; }
.day {
  aspect-ratio: 1; border: 0; border-radius: 50%; background: transparent;
  color: var(--muted); font: inherit; opacity: .45; cursor: default;
}
.day.available { background: var(--accent-soft); color: var(--accent-text); font-weight: 700; opacity: 1; cursor: pointer; }
.day.available:hover { outline: 2px solid var(--accent); }
.day.selected { background: var(--accent); color: #fff; }
.day.today { text-decoration: underline; text-underline-offset: 3px; }

.people { display: grid; gap: 12px; margin-top: 16px; max-width: 520px; }
.person {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px;
  color: var(--text); text-decoration: none;
}
.person:hover { border-color: var(--accent); background: var(--accent-soft); }
.person b { display: block; font-size: 16px; }
.person small { color: var(--muted); }
.person .go { color: var(--accent); font-weight: 700; font-size: 20px; }

.times h3 { margin: 4px 0 14px; font-size: 15px; }
.slots { display: grid; gap: 8px; max-height: 420px; overflow-y: auto; padding-right: 4px; }
.slot {
  padding: 11px; border-radius: 10px; border: 1px solid var(--accent); background: transparent;
  color: var(--accent-text); font: inherit; font-weight: 600; cursor: pointer;
}
.slot:hover { background: var(--accent-soft); }

form { display: grid; gap: 16px; max-width: 620px; }
form h2 { margin: 0; }
label { display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
input, textarea {
  font: inherit; font-weight: 400; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--card); color: var(--text); width: 100%;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.choice { border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.choice legend { font-weight: 600; font-size: 14px; margin-bottom: 8px; }
.option {
  display: flex; gap: 10px; align-items: flex-start; padding: 14px;
  border: 1px solid var(--line); border-radius: 10px; cursor: pointer; font-weight: 400;
}
.option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.option input { width: auto; margin-top: 4px; accent-color: var(--accent); }
.option b { display: block; }
.option small { color: var(--muted); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.error { color: var(--danger); margin: 0; }
.primary {
  justify-self: start; padding: 12px 22px; border-radius: 10px; border: 0;
  background: var(--accent); color: #fff; font: inherit; font-weight: 700; cursor: pointer;
}
.primary:disabled { opacity: .6; cursor: progress; }
.link-btn { justify-self: start; background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 0; }

.done { text-align: center; max-width: 520px; margin: 24px auto; display: grid; gap: 10px; justify-items: center; }
.tick {
  width: 56px; height: 56px; border-radius: 50%; background: #dcfae6; color: #067647;
  display: grid; place-items: center; font-size: 28px; font-weight: 700;
}
.done h2 { margin: 6px 0 0; }
.done h3 { margin: 18px 0 4px; font-size: 15px; }
.cal-buttons { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.cal-buttons a, .join {
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--line);
  color: var(--text); text-decoration: none; font-weight: 600; font-size: 14px;
}
.cal-buttons a:hover { border-color: var(--accent); }
.join { display: inline-block; background: var(--accent); border-color: var(--accent); color: #fff; margin-top: 6px; }

@media (max-width: 860px) {
  .card { grid-template-columns: 1fr; }
  .intro { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px; }
  .facts { margin: 12px 0 0; }
  #step-pick { grid-template-columns: 1fr; }
  .step { padding: 20px 16px; }
  .slots { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); max-height: none; }
}
@media (max-width: 560px) {
  body { padding: 12px 0; }
  .card { border-radius: 0; border-left: 0; border-right: 0; }
  .row, .choice { grid-template-columns: 1fr; }
}

[hidden] { display: none !important; }