:root {
  --white: #ffffff;
  --s50: #fafaf9;
  --s100: #f5f5f4;
  --s200: #e7e5e4;
  --s300: #d6d3d1;
  --s400: #a8a29e;
  --s500: #78716c;
  --s600: #57534e;
  --s700: #44403c;
  --s900: #1c1917;
  --err: #b42318;
  --ok: #166534;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--white);
  color: var(--s900);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, ul, dl, dd { margin: 0; }
ul { padding: 0; list-style: none; }

.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--s100);
}
.nav-in {
  max-width: 72rem; margin: 0 auto; padding: 1rem;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1rem;
}
.brand { font-size: 1rem; font-weight: 500; letter-spacing: -0.025em; white-space: nowrap; transition: color .15s; }
.brand:hover { color: var(--s600); }
.nav-links { display: flex; align-items: center; gap: 0.875rem; font-size: 0.875rem; color: var(--s500); }
.nav-links a { transition: color .15s; padding: 2px 0; }
.nav-links a:hover { color: var(--s900); }

.site-foot { margin-top: 2rem; border-top: 1px solid var(--s100); padding: 1.5rem 0; }
.foot-in {
  max-width: 72rem; margin: 0 auto; padding: 0 1rem;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.875rem; color: var(--s500);
}
.foot-links { display: flex; align-items: center; gap: 1rem; }
.foot-links a { transition: color .15s; }
.foot-links a:hover { color: var(--s700); }

main { flex: 1 0 auto; width: 100%; }
.page { max-width: 48rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
.eyebrow {
  font-size: 0.875rem; font-weight: 500; color: var(--s500);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem;
}
h1 { font-size: 1.875rem; line-height: 1.2; font-weight: 300; margin-bottom: 1.25rem; }
.lead { font-size: 1.125rem; font-weight: 300; line-height: 1.625; color: var(--s500); max-width: 36rem; }
.head { margin-bottom: 2.5rem; }
h2 { font-size: 1.25rem; font-weight: 400; line-height: 1.3; margin-bottom: 1rem; }
h2:focus { outline: none; }
h3 { font-size: 1rem; font-weight: 500; margin-bottom: 0.5rem; }
.muted { color: var(--s500); }
.small { font-size: 0.875rem; }

.panel { border: 1px solid var(--s200); padding: 1.5rem; margin-bottom: 1.5rem; background: var(--white); }

.types { display: grid; gap: 1rem; grid-template-columns: 1fr; }
.type-btn {
  display: block; width: 100%; text-align: left; background: var(--white);
  border: 1px solid var(--s200); padding: 1.5rem; cursor: pointer;
  transition: border-color .15s;
}
.type-btn:hover { border-color: var(--s900); }
.type-btn .eyebrow { margin-bottom: 0.75rem; }
.type-btn .t { display: block; font-size: 1.125rem; color: var(--s900); }
.type-btn .go { display: block; margin-top: 0.75rem; color: var(--s500); }
.type-btn:hover .go { color: var(--s700); }

button { font: inherit; color: inherit; cursor: pointer; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 44px; padding: 0.75rem 1.5rem;
  background: var(--s900); color: var(--white); border: 1px solid var(--s900);
  font-size: 0.9375rem; font-weight: 500; transition: background-color .15s;
}
.btn:hover:not(:disabled) { background: var(--s700); border-color: var(--s700); }
.btn:disabled { background: var(--s200); border-color: var(--s200); color: var(--s500); cursor: not-allowed; pointer-events: none; }
.btn.ghost { background: var(--white); color: var(--s900); border-color: var(--s300); }
.btn.ghost:hover:not(:disabled) { background: var(--white); border-color: var(--s900); }
.btn.danger { background: var(--white); color: var(--err); border-color: var(--err); }
.btn.danger:hover:not(:disabled) { background: #fef3f2; border-color: var(--err); }
.link {
  background: none; border: none; padding: 0; min-height: 0; font: inherit;
  color: var(--s900); text-decoration: underline; text-underline-offset: 3px;
}
.link:hover { color: var(--s600); }
:focus-visible { outline: 2px solid var(--s900); outline-offset: 2px; }

.row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: 1rem; }

.layout { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.cal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.cal-head h3 { margin: 0; font-weight: 500; }
.cal-nav {
  width: 44px; height: 44px; padding: 0; background: var(--white);
  border: 1px solid var(--s200); font-size: 1.125rem; line-height: 1; transition: border-color .15s;
}
.cal-nav:hover:not(:disabled) { border-color: var(--s900); }
.cal-nav:disabled { color: var(--s300); cursor: not-allowed; }
.grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.dow { text-align: center; font-size: 0.75rem; font-weight: 500; letter-spacing: 0.05em; color: var(--s500); padding: 6px 0; text-transform: uppercase; }
.day {
  aspect-ratio: 1 / 1; min-height: 40px; padding: 0; background: none; border: 1px solid transparent;
  font-size: 0.9375rem; color: var(--s400); cursor: default;
}
.day.has { background: var(--s100); color: var(--s900); font-weight: 500; cursor: pointer; }
.day.has:hover { border-color: var(--s900); }
.day.today:not(.has) { border-color: var(--s200); }
.day.sel { background: var(--s900); color: var(--white); border-color: var(--s900); }
.times { display: grid; gap: 0.5rem; grid-template-columns: repeat(2, 1fr); max-height: 22rem; overflow-y: auto; padding: 2px; }
.time-btn {
  min-height: 44px; padding: 0.5rem; background: var(--white); border: 1px solid var(--s300);
  font-size: 0.9375rem; font-weight: 500; transition: border-color .15s, background-color .15s;
}
.time-btn:hover { border-color: var(--s900); background: var(--s50); }

label, .lbl { display: block; font-size: 0.875rem; font-weight: 500; color: var(--s700); margin: 1.25rem 0 0.375rem; }
input[type=text], input[type=email], input[type=date], input[type=time], textarea, select {
  width: 100%; min-height: 44px; padding: 0.625rem 0.75rem; font: inherit; color: var(--s900);
  background: var(--white); border: 1px solid var(--s300); border-radius: 0;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--s900); outline-offset: 0; border-color: var(--s900); }
textarea { min-height: 6rem; resize: vertical; }
select { width: auto; max-width: 100%; }
.hint { font-size: 0.875rem; color: var(--s500); margin-top: 0.375rem; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.err { color: var(--err); font-size: 0.9375rem; margin-top: 0.75rem; min-height: 1.4em; }
.ok { color: var(--ok); font-weight: 500; }

.check { display: flex; align-items: flex-start; gap: 0.75rem; margin: 1.5rem 0 0; font-weight: 400; color: var(--s700); font-size: 0.9375rem; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; flex: none; accent-color: var(--s900); }

.btn-wrap { position: relative; display: inline-block; }
.btn-wrap[data-disabled="true"] { cursor: not-allowed; }
.tip {
  position: absolute; left: 0; bottom: calc(100% + 8px); z-index: 20; width: max-content; max-width: min(18rem, 80vw);
  background: var(--s900); color: var(--white); font-size: 0.875rem; line-height: 1.4; padding: 0.5rem 0.75rem;
  visibility: hidden; opacity: 0; transition: opacity .12s; pointer-events: none;
}
.tip::after { content: ""; position: absolute; left: 1.25rem; top: 100%; border: 6px solid transparent; border-top-color: var(--s900); }
.btn-wrap[data-disabled="true"]:hover .tip,
.btn-wrap[data-disabled="true"]:focus .tip,
.btn-wrap.show .tip { visibility: visible; opacity: 1; }
.btn-wrap[data-disabled="true"]:focus { outline: 2px solid var(--s900); outline-offset: 2px; }

dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1.5rem; margin: 1rem 0 1.5rem; }
dl.facts dt { color: var(--s500); font-size: 0.875rem; padding-top: 2px; }
dl.facts dd { font-weight: 500; word-break: break-word; }

.tzbar { margin-bottom: 1.5rem; }
.tzbar label { margin-top: 0; }

.expand { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--s100); color: var(--s500); }
.expand-form { margin-top: 1.5rem; padding: 1.5rem; border: 1px solid var(--s200); background: var(--s50); }
.opt-row { display: grid; gap: 0.5rem; grid-template-columns: 1fr; align-items: end; margin-bottom: 0.75rem; }
.opt-row .opt-label { margin: 0 0 0.25rem; }
.opt-row .opt-err { color: var(--err); font-size: 0.875rem; min-height: 1.25em; }
.invitees li { display: flex; gap: 0.75rem; align-items: center; padding: 0.25rem 0; word-break: break-all; }
.mt-05 { margin-top: 0.5rem; }
.mt-1 { margin-top: 1rem; }
.mt-15 { margin-top: 1.5rem; }
label.plain { margin: 0; font-weight: 400; font-size: 0.9375rem; }
.block { margin: 1.5rem 0; }
[hidden] { display: none !important; }

@media (min-width: 640px) {
  .types { grid-template-columns: repeat(3, 1fr); }
  .layout { grid-template-columns: 1.15fr 1fr; }
  .times { grid-template-columns: 1fr; }
  .opt-row { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 768px) {
  .nav-in { padding: 1.25rem 2rem; }
  .brand { font-size: 1.125rem; }
  .nav-links { gap: 2.5rem; font-size: 1rem; }
  .foot-in { padding: 0 2rem; font-size: 1rem; }
  .foot-links { gap: 1.5rem; }
  .page { padding: 4rem 2rem 6rem; }
  h1 { font-size: 3rem; }
  .lead { font-size: 1.25rem; }
  .panel { padding: 2rem; }
}
@media (max-width: 399px) {
  .nav-links { gap: 0.75rem; font-size: 0.8125rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

.grow { flex: 1 1 14rem; }
.time-btn.pad { padding: 0.5rem 1rem; }