:root {
  --bg: #f3f5f9;
  --card: #ffffff;
  --ink: #0d1b34;
  --muted: #55627a;
  --line: #d9dfeb;
  --accent: #1a5cff;
  --accent-hover: #0f49d6;
  --on-accent: #ffffff;
  --code-bg: #0d1b34;
  --code-ink: #d6e2ff;
  --code-dim: #7d8db0;
  --code-ok: #5fd39a;
  --code-hl: #7fb0ff;
  --inline-code: #e6ebf6;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: ui-sans-serif, system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a1222;
    --card: #101b31;
    --ink: #e6ecfa;
    --muted: #93a1bd;
    --line: #1f2d49;
    --accent: #4d85ff;
    --accent-hover: #74a0ff;
    --on-accent: #06122b;
    --code-bg: #060c18;
    --inline-code: #17233d;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
code { font-family: var(--mono); font-size: .88em; background: var(--inline-code); padding: .1em .4em; border-radius: 5px; }

.top, main, footer { width: min(1040px, 100% - 40px); margin-inline: auto; }

.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.brand img { border-radius: 9px; }
.top nav { display: flex; gap: 22px; font-size: 15px; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover { color: var(--ink); }

.hero { padding: 40px 0 36px; max-width: 760px; }
.eyebrow { font: 600 12px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 18px; }
h1 { font: 500 clamp(34px, 5vw, 52px)/1.1 var(--serif); letter-spacing: -.015em; margin: 0 0 20px; text-wrap: balance; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.fine { font-size: 13px; color: var(--muted); margin: 18px 0 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 20px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  font: 600 15px/1 var(--sans); text-decoration: none; cursor: pointer;
  transition: background .15s, border-color .15s, transform .15s;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }


.demo-wrap { padding: 0 0 56px; }
.demo { margin: 0; border-radius: 14px; overflow: hidden; background: #0a0a0b; border: 1px solid var(--line); box-shadow: 0 18px 40px -24px rgba(13, 27, 52, .6); }
.demo iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; }
.center { text-align: center; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 26px; }
.cols p { margin: 0; color: var(--muted); font-size: 15px; }
.block { padding: 56px 0; border-top: 1px solid var(--line); }
h2 { font: 500 30px/1.2 var(--serif); letter-spacing: -.01em; margin: 0 0 8px; }
h3 { font: 600 17px/1.3 var(--sans); margin: 0 0 6px; }
.sub { color: var(--muted); margin: 0 0 26px; max-width: 38em; }
.ext-title { font: 500 22px/1.2 var(--serif); margin: 44px 0 6px; }

.files { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--card); overflow: hidden; }
.files li { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 22px; }
.files li + li { border-top: 1px solid var(--line); }
.files .what-file p { margin: 4px 0 8px; color: var(--muted); font-size: 15px; max-width: 40em; }
.files .what-file code { color: var(--muted); }
.files strong { font-size: 17px; }
.files .btn { flex: none; min-width: 130px; }
.tag { display: inline-block; margin-left: 10px; padding: 2px 9px; border-radius: 99px; font: 600 11px/1.6 var(--mono); letter-spacing: .04em; text-transform: uppercase; background: var(--accent); color: var(--on-accent); vertical-align: 2px; }
.tag[hidden] { display: none; }
.tag.soon { background: var(--inline-code); color: var(--muted); }
.files li.mine { background: color-mix(in srgb, var(--accent) 7%, var(--card)); }

.more { margin: 18px 0 0; color: var(--muted); font-size: 15px; }
.more a { color: var(--accent); text-underline-offset: 3px; }
.sep { margin: 0 8px; color: var(--line); }

.steps { list-style: none; counter-reset: step; margin: 30px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.steps li { counter-increment: step; }
.steps li::before { content: counter(step); display: block; font: 400 54px/1 var(--serif); color: var(--accent); margin-bottom: 10px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }

.notes dl { margin: 26px 0 0; display: grid; grid-template-columns: 220px 1fr; gap: 22px 32px; }
.notes dt { font-weight: 600; }
.notes dd { margin: 0; color: var(--muted); }

footer { padding: 36px 0 56px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { text-underline-offset: 3px; }
footer .fine { margin-top: 10px; }

@media (max-width: 820px) {
  .hero { padding-top: 20px; }
  .cols { grid-template-columns: 1fr; gap: 22px; }
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .notes dl { grid-template-columns: 1fr; gap: 4px; }
  .notes dd { margin-bottom: 14px; }
  .files li { flex-direction: column; align-items: stretch; gap: 14px; }
  .files .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  
  .btn { transition: none; }
}