:root {
  --bg: #f6fbff;
  --surface: #ffffff;
  --text: #10233d;
  --muted: #4e6a8c;
  --line: #d9e8f5;
  --accent: #1a7fd6;
  --accent-strong: #1565c0;
  --tint: #e3f2ff;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1722;
    --surface: #16212f;
    --text: #e8f1fb;
    --muted: #9db3cc;
    --line: #26364a;
    --accent: #5bb8f5;
    --accent-strong: #8ed0ff;
    --tint: #18324d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); }
a:hover { color: var(--accent-strong); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
header.site .wrap { display: flex; align-items: center; gap: 12px; height: 64px; }
header.site img { width: 32px; height: 32px; }
header.site .brand { font-weight: 700; font-size: 19px; color: var(--text); text-decoration: none; margin-right: auto; }
header.site nav { display: flex; gap: 20px; font-size: 15px; }
header.site nav a { color: var(--muted); text-decoration: none; }
header.site nav a:hover { color: var(--text); }

.hero {
  background: linear-gradient(160deg, #eef9ff 0%, #cdebff 55%, #a5d9ff 100%);
  color: #10233d;
  padding: 64px 0 48px;
}
.hero .wrap { display: grid; grid-template-columns: 1fr 1.25fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
.hero p.lead { font-size: 19px; color: #2a4466; margin: 0 0 28px; }
.hero .meta { font-size: 14px; color: #4e6a8c; margin-top: 12px; }
/* The hero stays light in dark mode, so its button keeps the deep blue. */
.hero .button { background: #1a7fd6; color: #fff; }
.hero .button:hover { background: #1565c0; }
.hero img.shot { width: 100%; border-radius: 14px; box-shadow: 0 24px 48px rgba(10, 60, 120, 0.25); }

.button {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px; border-radius: 12px; font-weight: 600; font-size: 17px;
  background: var(--accent); color: #fff; text-decoration: none;
  box-shadow: 0 6px 16px rgba(26, 127, 214, 0.3);
}
.button:hover { background: var(--accent-strong); color: #fff; }
.button.secondary { background: var(--surface); color: var(--accent); box-shadow: none; border: 1px solid var(--line); }
.button.disabled { background: var(--tint); color: var(--muted); box-shadow: none; pointer-events: none; }

section { padding: 56px 0; }
section + section { border-top: 1px solid var(--line); }
section h2 { font-size: 30px; letter-spacing: -0.01em; margin: 0 0 8px; }
section p.sub { color: var(--muted); margin: 0 0 28px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.steps div { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.steps div::before {
  counter-increment: step; content: counter(step);
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 10px;
}
.steps h3 { margin: 0 0 6px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.features div { padding: 4px 0; }
.features h3 { margin: 0 0 4px; font-size: 18px; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }

.browsers { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.note { font-size: 15px; color: var(--muted); }

main.doc { max-width: 760px; margin: 0 auto; padding: 48px 16px 64px; }
main.doc h1 { font-size: 36px; letter-spacing: -0.01em; margin: 0 0 4px; }
main.doc h2 { font-size: 22px; margin: 32px 0 8px; }
main.doc .updated { color: var(--muted); margin: 0 0 24px; }
main.doc li { margin-bottom: 6px; }
code { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--tint); padding: 2px 6px; border-radius: 6px; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 20px; }
footer.site a { color: var(--muted); }

@media (max-width: 800px) {
  .hero .wrap, .steps, .features { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  header.site nav { gap: 14px; font-size: 14px; }
}

@media (max-width: 600px) {
  header.site .wrap { height: auto; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; row-gap: 6px; }
  header.site nav { width: 100%; flex-wrap: wrap; }
  .hero { padding: 40px 0 32px; }
  section { padding: 40px 0; }
}