:root {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #fafafa;
  --card: #fff;
  --border: #ddd;
  --accent: #2b6cb0;
  --accent-bg: #ebf2fa;
  --highlight: #fff7cc;
  --highlight-border: #e6c84c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

h1 { margin: 0 0 .25rem; font-size: 1.6rem; }
h2 { margin: 1.5rem 0 .5rem; font-size: 1.25rem; }
.sub { color: var(--muted); margin: 0 0 1rem; }

.progress {
  display: flex;
  gap: .5rem;
  padding: 0;
  margin: 0 0 1.5rem;
  list-style: none;
  font-size: .85rem;
  color: var(--muted);
}
.progress li {
  flex: 1;
  padding: .4rem .6rem;
  border-top: 3px solid var(--border);
  text-align: center;
}
.progress li.active {
  color: var(--accent);
  border-top-color: var(--accent);
  font-weight: 600;
}
.progress li.done {
  color: var(--fg);
  border-top-color: var(--accent);
}

.page {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.25rem 1rem;
}

/* ---------- Days (page 1) ---------- */
.day-row {
  display: grid;
  grid-template-columns: 7em 1fr;
  align-items: center;
  padding: .5rem 0;
  border-bottom: 1px solid var(--border);
}
.day-row:last-child { border-bottom: 0; }
.day-row .label { font-weight: 600; }
.day-row .opts {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.day-row label {
  display: inline-flex;
  gap: .35rem;
  align-items: center;
  cursor: pointer;
}

/* ---------- Checkgrid (pages 2 & 3) ---------- */
.checkgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .35rem .75rem;
  margin: .5rem 0 1rem;
}
.checkgrid label {
  display: flex;
  gap: .5rem;
  align-items: flex-start;
  padding: .45rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}
.checkgrid label:hover { background: var(--accent-bg); }
.checkgrid input[type=checkbox] { margin-top: .2rem; }
.checkgrid label.highlight {
  background: var(--highlight);
  border-color: var(--highlight-border);
}

.other {
  display: block;
  margin-top: .5rem;
  font-size: .95rem;
}
.other input {
  display: block;
  width: 100%;
  margin-top: .25rem;
  padding: .45rem .6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.25rem;
}
.nav button {
  font: inherit;
  padding: .55rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}
.nav .next,
.nav #submit-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.nav button:disabled { opacity: .5; cursor: not-allowed; }

.done, .error { text-align: center; padding: 2rem 1.25rem; }
.error h2 { color: #b00020; }