:root {
  color-scheme: light dark;
  --page: #F6F3EA; --surface: #FFFFFF; --raised: #F8F7F1;
  --primary: #14352B; --secondary: #2F6B54; --accent: #E8A33D;
  --wash: #F8E7C6; --border: #D6D9CF; --text: #17211D; --muted: #55625B;
  --on-accent: #14352B; --on-primary: #FFFFFF; --control-border: #78847B;
  --glow: rgb(232 163 61 / 15%); --green-glow: rgb(47 107 84 / 8%);
  --shadow: 0 24px 64px rgb(20 53 43 / 12%), 0 3px 8px rgb(20 53 43 / 7%);
  --small-shadow: 0 5px 16px rgb(20 53 43 / 8%); --sheen: rgb(255 255 255 / 55%);
  --overlay-scrim: rgb(14 23 19 / 75%);
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --heading: ui-rounded, "Arial Rounded MT Bold", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --content-max: 1120px; --reading-max: 760px; --gutter: clamp(20px, 4vw, 44px);
  --header-height: 88px; --space-1: 8px; --space-2: 16px; --space-3: 24px;
  --space-4: 32px; --space-5: 48px; --space-6: 64px; --space-7: 96px;
  --section-space: clamp(var(--space-6), 8vw, var(--space-7));
  --title-size: clamp(42px, 6vw, 72px); --heading-size: clamp(30px, 4vw, 46px);
  --subheading-size: clamp(20px, 2.3vw, 25px); --button-height: 48px;
  --hero-size: clamp(64px, 8vw, 108px); --scene-size: clamp(40px, 6vw, 72px);
  --panel-heading-size: 28px; --drawing-heading-size: 20px; --note-heading-size: 23px;
  --sample-button-height: 40px;
  --radius: 16px; --popup-width: 420px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #0E1713; --surface: #15231D; --raised: #1D3128;
    --primary: #EEF1E9; --secondary: #5FB58F; --accent: #F2B04A;
    --wash: #2E2A1A; --border: #2C3D35; --text: #EEF1E9; --muted: #A9B6AC;
    --control-border: #819A8B; --on-primary: #0E1713;
    --glow: rgb(242 176 74 / 9%); --green-glow: rgb(95 181 143 / 9%);
    --shadow: 0 24px 64px rgb(0 0 0 / 30%), 0 1px 0 rgb(169 182 172 / 12%) inset;
    --small-shadow: 0 5px 16px rgb(0 0 0 / 20%); --sheen: rgb(255 255 255 / 28%);
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + var(--space-3)); }
body { margin: 0; background: var(--page); color: var(--text); font: 17px/1.65 var(--font); }
[hidden] { display: none !important; }
::selection { color: var(--on-accent); background: var(--accent); }
a { color: var(--secondary); text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
button, input, textarea, select { font: inherit; }
button, select { cursor: pointer; }
button { color: inherit; }
button:disabled { cursor: default; opacity: .5; }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; }
figure { margin: 0; }
h1, h2, h3, h4, p { margin: 0 0 var(--space-2); }
h1, h2, h3, h4 { font-family: var(--heading); color: var(--primary); line-height: 1.12; letter-spacing: -.03em; }
h1 { font-size: var(--title-size); } h2 { font-size: var(--heading-size); }
h3 { font-size: var(--subheading-size); } h4 { font-size: 18px; }
p:last-child { margin-bottom: 0; }
code, kbd { font-family: var(--mono); overflow-wrap: anywhere; }
mark { color: var(--text); background: var(--wash); padding: .1em .25em; box-decoration-break: clone; }
strong, b { font-weight: 650; }
:focus-visible { outline: 3px solid var(--secondary); outline-offset: 5px; }
.wrap { width: calc(100% - var(--gutter) * 2); max-width: var(--content-max); margin-inline: auto; }
.wrap > *, .split-layout > *, .section-heading > *, .wide-workspace > * { min-width: 0; }
.reading { width: 100%; max-width: var(--reading-max); margin-inline: auto; }
.band { padding-block: var(--section-space); }
.small { font-size: 13px; line-height: 1.55; } .muted { color: var(--muted); }
.lead { font-size: clamp(18px, 2vw, 21px); line-height: 1.65; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip { position: fixed; top: var(--space-2); left: var(--gutter); z-index: 20; padding: var(--space-2); color: var(--text); background: var(--surface); transform: translateY(-200%); }
.skip:focus { transform: none; }
.site-head { position: sticky; z-index: 10; top: 0; border-bottom: 1px solid var(--border); background: var(--page); }
.head-inner { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.brand { flex-shrink: 0; display: inline-block; } .brand img { width: 172px; display: block; transition: transform .25s cubic-bezier(.3,1.6,.5,1), filter .25s ease; }
.brand:hover img, .brand:focus-visible img { transform: translateY(-2px) rotate(-1.5deg) scale(1.05); filter: drop-shadow(0 6px 14px var(--amber-glow, rgba(232,163,61,.45))); }
.brand:active img { transform: scale(.98); }
@media (prefers-reduced-motion: reduce) { .brand img { transition: none; } .brand:hover img, .brand:focus-visible img { transform: none; } }
.nav { display: flex; gap: var(--space-4); align-items: center; }
.nav a { padding-block: var(--space-2); color: var(--text); font-size: 15px; text-decoration: none; position: relative; }
.nav a::after { content: ""; position: absolute; height: 3px; bottom: 8px; left: 0; right: 0; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.nav a:hover::after, .nav a:focus-visible::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav-toggle { display: none; width: 46px; height: 46px; border: 1px solid var(--control-border); border-radius: 10px; background: var(--surface); padding: 12px; }
.nav-toggle > span:not(.visually-hidden) { display: block; height: 2px; background: var(--text); margin: 4px 0; }
.page-head { padding-block: var(--space-6); border-bottom: 1px solid var(--border); background: radial-gradient(ellipse at 85% 25%, var(--glow), transparent 65%); }
.page-head h1 { margin-bottom: var(--space-3); }
.page-head .lead { max-width: var(--reading-max); color: var(--muted); }
.section-heading { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: end; margin-bottom: var(--space-5); }
.section-heading p { color: var(--muted); }
.split-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: var(--space-6); }
.section-copy p { margin-top: var(--space-3); }
.margin-note { border-left: 3px solid var(--accent); padding-left: var(--space-3); color: var(--muted); font-size: 15px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; font-weight: 650; }
.arrow { width: 22px; height: 22px; flex-shrink: 0; }
.button { position: relative; isolation: isolate; overflow: hidden; min-height: var(--button-height); display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 12px 22px; border: 1px solid var(--control-border); border-radius: 10px; color: var(--text); background: var(--surface); font-weight: 650; font-size: 15px; line-height: 1.4; text-decoration: none; box-shadow: var(--small-shadow); transition: transform .18s, box-shadow .18s; }
.button::before { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(110deg, transparent 15%, var(--sheen) 45%, transparent 75%); transform: translateX(-125%); transition: transform .55s; }
.button:hover::before, .button:focus-visible::before { transform: translateX(125%); }
.button:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }
.button:active { transform: translateY(1px); box-shadow: none; }
.button-primary { background: var(--accent); color: var(--on-accent); border-color: var(--on-accent); }
.button .app-icon img, .button .button-icon { width: 24px; }
.text-button { border: 0; background: none; color: var(--secondary); padding: 4px 0; text-decoration: underline; text-underline-offset: 4px; font-size: 13px; }
.chip { display: inline-flex; justify-content: center; align-items: center; gap: 8px; border: 1px solid var(--control-border); border-radius: 7px; padding: 6px 11px; font-size: 12px; line-height: 1.4; background: var(--surface); color: var(--text); transition: transform .2s, background .2s; }
.chip:hover:not(:disabled) { transform: translateY(-2px); background: var(--wash); }
.chip[aria-pressed="true"], .chip.selected { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.field label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 6px; }
.field input, .field textarea, .field select { width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--control-border); border-radius: 7px; color: var(--text); background: var(--surface); font-size: 15px; line-height: 1.5; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted); opacity: 1; }
.field textarea { min-height: 150px; resize: vertical; }
.note { padding: var(--space-3); border-left: 3px solid var(--accent); background: var(--wash); font-size: 15px; }
.disclosure, .distribution { font-size: 13px; line-height: 1.65; color: var(--muted); }
.install-status { padding: var(--space-2); border-left: 3px solid var(--secondary); background: var(--surface); font-size: 15px; }
.site-foot { border-top: 1px solid var(--border); background: linear-gradient(150deg, var(--green-glow), transparent 70%), var(--surface); padding-block: var(--space-6); }
.foot-directory { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--space-5); }
.foot-brand img { width: 180px; } .foot-brand p { margin-top: var(--space-3); font-size: 15px; color: var(--muted); }
.foot-col { display: flex; flex-direction: column; align-items: start; gap: 10px; }
.foot-col h2 { font: 650 14px var(--font); letter-spacing: 0; margin-bottom: 6px; }
.foot-col a { color: var(--muted); font-size: 14px; text-decoration: none; }
.foot-col a:hover { color: var(--secondary); text-decoration: underline; }
.foot-copy { font-size: 13px !important; }
.app-icon { display: block; flex-shrink: 0; }
.popup-drawing { width: 100%; max-width: var(--popup-width); margin-inline: auto; border: 1px solid var(--border); border-radius: var(--radius); background: linear-gradient(145deg, var(--green-glow), transparent 35%), var(--surface); box-shadow: var(--shadow); overflow: hidden; transition: transform .3s; font-size: 13px; line-height: 1.5; }
.popup-drawing:hover { transform: translateY(-4px); }
.popup-head { padding: 14px 18px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--border); }
.popup-head > div { display: flex; flex-direction: column; } .popup-head strong { font-size: 16px; }
.popup-head div > span { color: var(--muted); font-size: 11px; } .expand-mark { margin-left: auto; color: var(--secondary); font-size: 24px; text-decoration: none; }
.mock-back { width: 18px; color: var(--secondary); flex-shrink: 0; }
.popup-body { padding: 18px; } .popup-body h3 { font-size: var(--drawing-heading-size); margin-bottom: 10px; }
.popup-tabs { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--border); background: var(--raised); }
.popup-tabs > * { font-size: 11px; padding: 12px 4px; text-align: center; text-decoration: none; color: var(--muted); }
.popup-tabs .selected { box-shadow: inset 0 3px var(--accent); color: var(--text); font-weight: 650; }
.mock-keyword { padding: 12px; border-radius: 8px; background: var(--wash); margin-bottom: 12px; }
.mock-keyword > span, .mock-preview > span { display: block; font-size: 11px; color: var(--muted); margin-bottom: 5px; }
.mock-keyword > strong { font-size: 18px; }
.mock-preview { background: var(--raised); border: 1px solid var(--border); border-radius: 8px; padding: 12px; margin-bottom: 14px; }
.mock-preview code { display: block; font-size: 12px; }
.mock-time, .mock-chips, .mock-reorder { display: flex; flex-wrap: wrap; gap: 6px; margin-block: 10px; }
.mock-time > span, .mock-chips > span, .mock-reorder > span { display: inline-block; border: 1px solid var(--border); border-radius: 6px; padding: 5px 8px; font-size: 11px; transition: transform .2s; }
.mock-chips > span:hover { transform: rotate(-3deg) translateY(-2px); }
.mock-time .selected { background: var(--primary); color: var(--on-primary); }
.mock-row { display: flex; gap: 8px; justify-content: space-between; align-items: center; margin-block: 12px; font-size: 12px; }
.mock-label { font-size: 11px; font-weight: 650; margin-top: 12px; }
.mock-input { display: block; min-width: 0; padding: 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--raised); font-size: 12px; }
.mock-row .mock-input { flex: 1; } .mock-small-action { font-size: 11px; color: var(--secondary); }
.mock-action { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 10px; background: var(--accent); color: var(--on-accent); border-radius: 7px; margin-top: 15px; font-weight: 650; }
.mock-preset { padding-block: 14px; border-bottom: 1px solid var(--border); }
.mock-preset > strong { display: block; margin-bottom: 8px; }
.mock-preset > div { display: flex; align-items: center; gap: 16px; color: var(--secondary); font-size: 11px; }
.mock-filter-list { list-style: none; padding: 0; margin: 0; }
.mock-filter { padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px; margin-block: 12px; background: var(--surface); box-shadow: var(--small-shadow); transition: transform .2s, border-color .2s; }
.mock-filter:hover { transform: translateY(-3px); border-color: var(--control-border); } .mock-filter .mock-row { margin: 0 0 8px; }
.mock-switch { position: relative; flex-shrink: 0; width: 36px; height: 24px; border-radius: 20px; border: 1px solid var(--control-border); background: var(--raised); }
.mock-switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: var(--muted); transition: transform .18s; }
.mock-switch[aria-checked="true"], .mock-switch.on { background: var(--secondary); }
.mock-switch[aria-checked="true"]::after, .mock-switch.on::after { background: var(--surface); transform: translateX(12px); }
.sample-status { padding-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.browser-drawing { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow); font-size: 13px; }
.browser-tab { display: flex; gap: 24px; align-items: center; padding: 12px 16px; background: var(--raised); border-bottom: 1px solid var(--border); color: var(--muted); font-size: 11px; }
.window-dots { display: inline-flex; gap: 5px; } .window-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--control-border); }
.browser-toolbar { display: flex; gap: 14px; align-items: center; padding: 9px 16px; border-bottom: 1px solid var(--border); }
.browser-address { flex: 1; min-width: 0; padding: 5px 10px; background: var(--raised); border: 1px solid var(--border); border-radius: 5px; font-family: var(--mono); font-size: 11px; }
.wide-workspace { display: grid; grid-template-columns: 1.3fr 1fr; padding: var(--space-4); gap: var(--space-4); }
.wide-side { padding-left: var(--space-4); border-left: 1px solid var(--border); }
.wide-side h3 { font-size: 18px; margin-top: var(--space-3); } .wide-side h3:first-child { margin-top: 0; }
figcaption { margin-top: var(--space-2); color: var(--muted); font-size: 12px; line-height: 1.65; }
.closing-band { background: var(--wash); border-top: 1px solid var(--border); padding-block: var(--space-6); }
.closing-inner { display: flex; justify-content: space-between; gap: var(--space-4); align-items: center; }
.closing-inner h2 { font-size: var(--heading-size); } .closing-inner p { color: var(--muted); } .closing-inner .button { flex-shrink: 0; }
@keyframes arrive { from { opacity: .65; transform: translateY(16px); } to { opacity: 1; transform: none; } }
/* The observer only adds an entrance animation. Failed scripts never hide content. */
.arrived { animation: arrive .65s both; animation-delay: var(--reveal-delay, 0ms); }
@media (max-width: 760px) {
  :root { --header-height: 72px; }
  .head-inner { flex-wrap: wrap; gap: 0; } .brand img { width: 148px; }
  .nav { width: 100%; justify-content: space-between; gap: 12px; } .nav a { font-size: 13px; }
  .nav-ready .nav-toggle { display: block; } .nav-ready .nav { display: none; padding-bottom: var(--space-2); } .nav-ready .nav.is-open { display: flex; }
  .section-heading, .split-layout { grid-template-columns: 1fr; gap: var(--space-4); }
  .foot-directory { grid-template-columns: repeat(3, 1fr); gap: var(--space-4); } .foot-brand { grid-column: 1 / -1; }
  .closing-inner { align-items: start; flex-direction: column; } .page-head { padding-block: var(--space-5); }
  .wide-workspace { grid-template-columns: 1fr; padding: var(--space-3); }
  .wide-side { padding: var(--space-3) 0 0; border-left: 0; border-top: 1px solid var(--border); }
}
@media (max-width: 420px) { .foot-directory { gap: var(--space-2); } .button { padding-inline: 16px; } .foot-col a { font-size: 13px; } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; }
  .button:hover, .popup-drawing:hover, .chip:hover:not(:disabled), .mock-filter:hover, .mock-chips > span:hover { transform: none; }
  .button::before { display: none; }
}