:root {
  font-family: -apple-system, BlinkMacSystemFont, Inter, sans-serif;
  color: #1c232d;
  background: #f6f7f9;
  scroll-padding-top: 80px;
}
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.55; }
header {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #ffffffed;
  border-bottom: 1px solid #dee1e6;
}
.bar, main { max-width: 1080px; margin: auto; padding-inline: clamp(16px, 4vw, 46px); }
.bar, nav, .actions { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.bar { min-height: 60px; }
a { color: #005abc; }
nav a, .brand { color: #283241; text-decoration: none; }
nav a:hover, .brand:hover { text-decoration: underline; }
.brand { font-weight: 750; }
main { padding-block: 28px 60px; }
h1, h2 { margin: 0; line-height: 1.18; letter-spacing: -.035em; }
h1 { font-size: clamp(34px, 5.5vw, 60px); }
h2 { font-size: clamp(21px, 2.5vw, 29px); }
.intro { margin: 8px 0 20px; color: #46556a; }
.cabinet { overflow: hidden; border-radius: 14px; background: white; border: 1px solid #d6dbe2; }
iframe { width: 100%; display: block; aspect-ratio: 16/9; border: 0; background: #10121a; }
iframe:fullscreen { width: 100vw; height: 100vh; }
.actions { padding: 10px 14px; font-size: 14px; }
button { font: inherit; color: #fff; background: #005abc; border: 0; padding: 7px 14px; border-radius: 8px; cursor: pointer; }
.details { margin-top: 30px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 36px; }
ol { padding-left: 1.4rem; }
li + li { margin-top: 5px; }
@media(max-width: 640px) {
  nav, .bar { gap: 12px; font-size: 14px; }
  iframe { aspect-ratio: 4/3; }
  .details { grid-template-columns: 1fr; gap: 16px; }
}

:root { color-scheme: dark; background: #101a22; color: #eef7f5; }
header { background: #111d26f5; border-color: #354651; }
.brand, nav a { color: #e1efef; }
.brand { letter-spacing: .025em; }
main { padding-top: clamp(24px, 4vw, 44px); }
h1 { font-family: "Space Mono", ui-monospace, monospace; letter-spacing: -.075em; }
h1 span { color: #80e3dc; }
.intro, .details p { color: #c0cfd4; }
.cabinet { background: #192a33; border-color: #46616c; box-shadow: 0 12px 40px #07101566; }
iframe { aspect-ratio: 4/3; max-height: 70vh; }
.actions a { color: #acebe4; }
.actions button { background: #a2eee0; color: #132b2a; font-weight: 650; }
.details { margin-bottom: 20px; grid-template-columns: 1fr 1fr; gap: 30px; }
.details section { border-top: 2px solid #57747b; padding-top: 16px; }
.details section:last-child { border-color: #69cfc8; }
details { border-bottom: 1px solid #314450; padding: 10px 0; }
summary { cursor: pointer; }
kbd { display: inline-block; background: #203641; padding: 1px 5px; border: 1px solid #46606b; border-radius: 4px; }
@media(max-width:640px){ .details {grid-template-columns:1fr;} .actions {gap:8px;} }