:root {
  --canvas: #f6f4f0;
  --card: #ffffff;
  --ink: #16161a;
  --text2: #6e6c72;
  --text3: #a3a1a8;
  --line: #e8e5df;
  --chip: #efece6;
  --accent: #ff6a2b;
  --accent-ink: #b8400d;
  --accent-soft: #fff0e8;
  --good: #1f9d57;
  --bad: #c9373c;
  --radius: 18px;
  --focus: 0 0 0 3px rgba(255, 106, 43, 0.45);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0c0c10;
    --card: #1b1b21;
    --ink: #f4f2ee;
    --text2: #9c9aa2;
    --text3: #6a6870;
    --line: #2a2a31;
    --chip: #26262c;
    --accent-ink: #ffb36b;
    --accent-soft: #3a2116;
    --good: #34c17a;
    --bad: #ff6b70;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  display: grid;
  gap: 16px;
}

.intro, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text2);
  margin: 0 0 12px;
}

.brand::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ffb36b);
}

h1 { font-size: 26px; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 18px; margin: 0 0 12px; }

.facts { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.facts li { background: var(--chip); border-radius: 999px; padding: 4px 12px; font-size: 14px; color: var(--text2); }
.desc { color: var(--text2); margin: 14px 0 0; white-space: pre-line; }
.muted { color: var(--text2); font-size: 14px; }

.month-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.month-head h2 { margin: 0; text-transform: capitalize; }

.icon-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  font-size: 18px; cursor: pointer;
}
.icon-btn:disabled { opacity: 0.35; cursor: default; }

.grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; text-align: center; }
.grid .dow { font-size: 12px; color: var(--text3); padding: 4px 0; text-transform: uppercase; }

.day {
  aspect-ratio: 1;
  min-height: 40px;
  border: 0; border-radius: 50%;
  background: transparent; color: var(--text3);
  font: inherit; font-size: 15px;
  cursor: default;
}
.day.available { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; cursor: pointer; }
.day.available:hover { filter: brightness(0.97); }
.day[aria-pressed="true"] { background: var(--accent); color: #fff; }
.day.today { text-decoration: underline; text-underline-offset: 3px; }

.tz { margin: 12px 0 0; font-size: 13px; color: var(--text2); }

.slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin-top: 8px; }

.slot {
  border: 1px solid var(--accent); border-radius: 12px;
  background: var(--card); color: var(--accent-ink);
  padding: 10px 8px; font: inherit; font-weight: 600; cursor: pointer;
  display: grid; gap: 2px;
}
.slot small { font-weight: 400; color: var(--text2); font-size: 12px; }
.slot:hover { background: var(--accent-soft); }

form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
label .opt { font-weight: 400; color: var(--text2); }

input, textarea, select {
  font: inherit; font-weight: 400; color: var(--ink);
  background: var(--canvas); border: 1px solid var(--line); border-radius: 12px;
  padding: 11px 12px; width: 100%;
}
textarea { min-height: 96px; resize: vertical; }

.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.primary, .secondary, .danger {
  font: inherit; font-weight: 600; border-radius: 12px; padding: 12px 18px; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.primary { background: var(--accent); color: #fff; border: 0; }
.primary:disabled { opacity: 0.6; cursor: progress; }
.secondary { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.danger { background: var(--card); color: var(--bad); border: 1px solid var(--bad); }
.link { background: none; border: 0; padding: 0; color: var(--accent-ink); font: inherit; cursor: pointer; text-decoration: underline; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }

.summary { background: var(--chip); border-radius: 12px; padding: 12px 14px; display: grid; gap: 2px; }
.summary strong { font-size: 16px; }

.notice { border-radius: 12px; padding: 10px 12px; font-size: 14px; }
.notice.error { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
.notice.ok { background: color-mix(in srgb, var(--good) 14%, transparent); color: var(--good); }

.done-mark {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--accent); color: #fff; display: grid; place-items: center;
  font-size: 28px; margin-bottom: 12px;
}

:focus-visible { outline: none; box-shadow: var(--focus); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }

@media (min-width: 760px) {
  .shell { grid-template-columns: 300px 1fr; align-items: start; padding-top: 48px; }
  .intro { position: sticky; top: 24px; }
  .picker { display: grid; grid-template-columns: minmax(280px, 1fr) minmax(200px, 0.8fr); gap: 24px; }
}

@media (prefers-reduced-motion: no-preference) {
  .panel > * { animation: fade 160ms ease-out; }
  @keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
}