:root {
  --ink: #15171c;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #1f6feb;
  --bg: #fbfbfd;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
main { max-width: 640px; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
.brand { font-weight: 700; letter-spacing: .12em; text-transform: lowercase; color: var(--accent); margin: 0 0 .5rem; }
h1 { font-size: 1.8rem; margin: 0 0 .4rem; }
.sub { color: var(--muted); margin: 0 0 2rem; }
.muted { color: var(--muted); }
.day { margin-bottom: 1.5rem; }
.day h2 { font-size: 1rem; font-weight: 600; text-transform: capitalize; margin: 0 0 .6rem; }
.times { display: flex; flex-wrap: wrap; gap: .5rem; }
.slot {
  border: 1px solid var(--line); background: #fff; border-radius: 8px;
  padding: .55rem .9rem; font-size: .95rem; cursor: pointer; transition: border-color .15s, color .15s;
}
.slot:hover { border-color: var(--accent); color: var(--accent); }
form { display: grid; gap: 1rem; max-width: 420px; }
label { display: grid; gap: .35rem; font-size: .9rem; color: var(--muted); }
input, textarea {
  font: inherit; color: var(--ink); padding: .6rem .7rem;
  border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
button[type="submit"] {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: .7rem 1rem; font-size: 1rem; font-weight: 600; cursor: pointer;
}
button[type="submit"]:disabled { opacity: .6; cursor: progress; }
.chosen { font-size: .95rem; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; text-decoration: underline; padding: 0; font: inherit; }
.error { color: #b91c1c; }
#done h2 { color: #15803d; }
a { color: var(--accent); }