:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1c1c1c;
  --sub: #6b6b6b;
  --accent: #1a5fff;
  --accent-ink: #ffffff;
  --line: #e4e4e0;
  --danger: #c62828;
  --ok: #1b7a3d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
h1, h2 { font-family: var(--font-head, inherit); }
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
.brand-head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 28px; text-decoration: none;
}
.brand-logo { width: 40px; height: 40px; border-radius: 50%; display: block; }
.brand-word {
  font-family: var(--font-head, inherit); font-weight: 700;
  font-size: 17px; color: var(--ink); letter-spacing: 0.01em;
}
.foot { text-align: center; color: var(--sub); font-size: 13px; padding: 20px; }
.foot a { color: var(--sub); text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.demo-banner {
  background: #fff3cd; color: #6b5200; padding: 10px 16px;
  font-size: 14px; text-align: center; border-bottom: 1px solid #eadfb0;
}
h1 { font-size: 28px; margin: 0 0 6px; }
h2 { font-size: 18px; margin: 0 0 8px; }
.sub { color: var(--sub); margin-top: 0; }
.tz { font-size: 13px; color: var(--sub); }
.back { color: var(--sub); text-decoration: none; font-size: 14px; }
.back:hover { color: var(--ink); }

.cards { display: grid; gap: 14px; margin-top: 24px; }
.card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 18px 20px; text-decoration: none; color: var(--ink);
}
a.card:hover { border-color: var(--accent); }
.card p { color: var(--sub); margin: 4px 0 10px; }
.card .meta { font-size: 13px; color: var(--sub); }
.card.static { margin-top: 20px; }

.days { margin: 20px 0; }
/* One row per work week: columns are Mon..Fri, so Friday always ends a row. */
.days.week-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.day {
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 4px; cursor: pointer; text-align: center; font: inherit;
  color: var(--ink); /* buttons don't inherit color; the generic button rule would paint this accent-ink (white) */
}
.day strong { display: block; font-size: 13px; }
.day .date { display: block; font-size: 12px; margin-top: 2px; }
.day .open { display: block; font-size: 11px; color: var(--sub); margin-top: 4px; }
.day.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

.slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
.slot {
  background: var(--card); border: 1px solid var(--accent); color: var(--accent);
  border-radius: 8px; padding: 10px 6px; cursor: pointer; font: inherit; font-weight: 600;
}
.slot:hover { background: var(--accent); color: var(--accent-ink); }

form label { display: block; margin: 14px 0; font-size: 14px; font-weight: 600; }
form input, form textarea {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; font: inherit; background: var(--card);
  color: var(--ink); /* inputs don't inherit text color; dark themes need this */
}
form input:focus, form textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
.row { display: flex; gap: 10px; margin-top: 18px; }
button {
  font: inherit; font-weight: 600; border: none; border-radius: 8px;
  padding: 12px 20px; cursor: pointer; background: var(--accent); color: var(--accent-ink);
}
button:disabled { opacity: 0.6; cursor: default; }
button.ghost { background: transparent; color: var(--sub); border: 1px solid var(--line); }
button.danger { background: var(--danger); }
.error { color: var(--danger); font-size: 14px; }
.status { font-weight: 700; }
.status.ok { color: var(--ok); }
.status.off { color: var(--sub); }
#loading { color: var(--sub); margin: 20px 0; }