:root {
  color-scheme: light dark;
  --paper: #f6f4ef;
  --surface: #fffefb;
  --ink: #1d1d1b;
  --muted: #5c5b55;
  --line: #d9d6cc;
  --wall: #1d1d1b;
  --accent: #c83f25;
  --accent-ink: #ffffff;
  --accent-soft: #f8ddd5;
  --band: #ece9e0;
  --deep: #1d1d1b;
  --deep-ink: #f6f4ef;
  --deep-muted: #bdbab0;
  --deep-link: #ff9d87;
  --sans: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --display: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171716;
    --surface: #20201e;
    --ink: #f1efe8;
    --muted: #b1aea4;
    --line: #3b3a36;
    --wall: #f1efe8;
    --accent: #ef6a4e;
    --accent-ink: #1d1d1b;
    --accent-soft: #4a2820;
    --band: #1f1f1d;
    --deep: #0f0f0e;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.6 var(--sans); }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; margin: 0; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.5rem, 5.4vw, 4.1rem); font-weight: 600; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); font-weight: 600; margin-bottom: 40px; }
h3 { font-size: 1.2rem; font-weight: 600; }
.wrap { width: min(1160px, 100%); margin-inline: auto; padding-inline: 24px; }
section.wrap { padding-block: 88px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--surface); padding: 8px 12px; }

.top { position: sticky; top: 0; z-index: 5; background: var(--paper); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; text-decoration: none; }
.brand img { background: #fff; border-radius: 3px; }
.top nav { display: flex; gap: 24px; font-size: 0.94rem; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--ink); }

.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: 56px; align-items: center; padding-block: 72px 88px; }
.eyebrow { font: 500 0.8rem/1.4 var(--mono); color: var(--accent); margin: 0 0 20px; }
.lead { font-size: 1.16rem; color: var(--muted); margin: 24px 0 32px; max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-block; padding: 12px 20px; border: 1.5px solid var(--ink); border-radius: 3px; font-weight: 600; font-size: 0.98rem; text-decoration: none; background: transparent; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(0.92); background: var(--accent); color: var(--accent-ink); }

.demo { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 16px; min-width: 0; }
.demo-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; font: 500 0.8rem/1.4 var(--mono); color: var(--muted); }
.reset { font: inherit; color: inherit; background: none; border: 0; padding: 4px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.profiles { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; min-height: 36px; }
.profile { font: 500 0.88rem/1 var(--sans); color: var(--ink); background: transparent; padding: 10px 12px; border: 1px solid var(--line); border-radius: 3px; cursor: pointer; }
.profile[aria-checked="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
#plan { width: 100%; height: auto; }
.room { fill: transparent; transition: fill .15s; }
.js .room { cursor: pointer; }
.js .room:hover { fill: var(--accent-soft); }
.room.done { fill: var(--accent-soft); }
.room:focus-visible { outline: none; stroke: var(--accent); stroke-width: 3; }
.walls path { fill: none; stroke: var(--wall); stroke-width: 8; stroke-linecap: square; pointer-events: none; }
.doors path { fill: none; stroke: var(--wall); stroke-width: 1.5; pointer-events: none; }
.tag { pointer-events: none; }
.tag rect { fill: var(--surface); stroke: var(--accent); stroke-width: 1.5; }
.tag .name { font: 600 15px var(--sans); fill: var(--ink); text-anchor: middle; }
.tag .meta { font: 400 11px var(--mono); fill: var(--muted); text-anchor: middle; }
.demo-status { font: 400 0.8rem/1.45 var(--mono); color: var(--muted); margin: 10px 0 0; min-height: 2.9em; }

.band { background: var(--band); padding-block: 88px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.step-no { font: 500 0.82rem var(--mono); color: var(--accent); display: block; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 2px solid var(--ink); }
.steps p { color: var(--muted); margin: 10px 0 0; }

.specs { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 56px; }
.specs div { padding: 20px 0; border-top: 1px solid var(--line); }
.specs dt { font-weight: 600; }
.specs dd { margin: 4px 0 0; color: var(--muted); }

.band.dark { background: var(--deep); color: var(--deep-ink); }
.band.dark a { color: var(--deep-link); }
.split { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 72px; align-items: center; }
.split h2 { margin-bottom: 20px; }
.split p { color: var(--deep-muted); max-width: 36em; margin: 0 0 12px; }
.offline { border-left: 2px solid var(--deep-link); padding-left: 24px; }
.offline p { margin: 0; }
.offline .big { font: 600 clamp(2.6rem, 5vw, 3.6rem)/1.1 var(--display); color: var(--deep-ink); margin-bottom: 8px; }

.get-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card { display: flex; flex-direction: column; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 24px; }
.card p, .card ul { color: var(--muted); margin: 10px 0 20px; flex: 1; }
.card ul { padding-left: 20px; }

.foot { border-top: 1px solid var(--line); padding-block: 32px; font-size: 0.92rem; }
.title-block { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1.5px solid var(--ink); }
.title-block > div { padding: 10px 14px; border-right: 1px solid var(--line); overflow-wrap: anywhere; }
.title-block > div:last-child { border-right: 0; }
.title-block span { display: block; font: 400 0.7rem/1.5 var(--mono); color: var(--muted); }
.fine { color: var(--muted); font-size: 0.84rem; margin: 16px 0 0; }

.doc { width: min(760px, 100%); margin-inline: auto; padding: 56px 24px 88px; }
.doc h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 8px; }
.doc h2 { font-size: 1.3rem; margin: 36px 0 8px; }
.doc .updated { font: 400 0.84rem var(--mono); color: var(--muted); margin: 0 0 32px; }
.doc p { margin: 0 0 14px; }
.doc p, .doc ul, .doc ol { overflow-wrap: anywhere; }
.doc h3 { margin: 24px 0 6px; }
.doc li { margin-bottom: 6px; }
.doc code { font: 400 0.84em var(--mono); }
.doc .eyebrow { margin-bottom: 12px; }
.doc .intro { font-size: 1.16rem; color: var(--muted); margin: 12px 0 0; }
.doc .card { margin: 32px 0; }
.doc .card h2 { margin: 0 0 8px; }
.doc .card .mail { font-size: 1.25rem; flex: none; margin: 0; }
.tip { background: var(--surface); border-left: 3px solid var(--accent); padding: 12px 16px; margin: 20px 0; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 4px; margin-bottom: 10px; }
.faq summary { padding: 12px 16px; font-weight: 600; cursor: pointer; }
.faq details > :not(summary) { margin-inline: 16px; }
.faq details > ul { padding-left: 20px; }
.faq details > :last-child { margin-bottom: 16px; }

@media (max-width: 900px) {
  .title-block { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .title-block > div { border-bottom: 1px solid var(--line); }
  .title-block > div:last-child { grid-column: span 2; }
  .hero, .split { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .hero { padding-block: 48px 64px; }
  .steps, .get-grid { grid-template-columns: minmax(0, 1fr); }
  section.wrap, .band { padding-block: 64px; }
}
@media (max-width: 640px) {
  .wrap { padding-inline: 16px; }
  .doc { padding-inline: 16px; }
  .specs { grid-template-columns: minmax(0, 1fr); }
  .title-block { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .title-block > div:nth-child(3) { grid-column: span 2; }
  .title-block > div:last-child { grid-column: auto; }
  .top nav { gap: 14px; font-size: 0.86rem; }
  .brand span { display: none; }
  .tag .name { font-size: 18px; }
  .tag .meta { font-size: 12px; }
}
@media (max-width: 420px) {
  .top nav .optional { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .room { transition: none; }
}