/* ROTOЯ · rotorpuzzle.com — brand colours from the capsule design brief (6 Nov 2026) */
@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("fonts/inter-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 800; font-display: swap; src: url("fonts/inter-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 700; font-display: swap; src: url("fonts/ibm-plex-mono-latin-700-normal.woff2") format("woff2"); }

:root {
  --bg: #0f172a; --bg2: #1e293b; --card: #16213a; --line: #2a3a5a;
  --fg: #e2e8f0; --muted: #b8c9d9; --mark: #ffffff; --accent: #22d3ee; --link: #7dd3fc;
  --glow: 0 0 0.22em rgba(56, 189, 248, 0.45);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff; --bg2: #e6f6ff; --card: #ffffff; --line: #bfe3f5;
    --fg: #0f172a; --muted: #35507a; --mark: #0284c7; --accent: #0369a1; --link: #0369a1;
    --glow: none;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: linear-gradient(135deg, var(--bg), var(--bg2)) fixed;
  color: var(--fg); font: 17px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* The wordmark: ROTO + a mirrored R, tracked wide */
.wordmark { display: inline-flex; gap: 0.7em; font-weight: 800; line-height: 1; color: var(--mark); text-shadow: var(--glow); text-decoration: none; }
.wordmark .r { display: inline-block; transform: scaleX(-1); }
.tagline { display: flex; justify-content: space-between; font-family: "IBM Plex Mono", ui-monospace, monospace; font-weight: 700; color: var(--muted); line-height: 1; }

/* Header on inner pages */
.top { padding: 22px 0; border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.top .wordmark { font-size: 20px; }
.top nav { display: flex; gap: 18px; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--accent); }

/* Home */
.hero { flex: 1; display: flex; align-items: center; padding: 64px 0 48px; }
.lockup { display: inline-flex; flex-direction: column; gap: 22px; }
.hero .wordmark { font-size: clamp(44px, 11vw, 88px); }
.hero .tagline { font-size: clamp(14px, 3.4vw, 27px); }
.lede { font-size: 19px; max-width: 34em; margin: 40px 0 0; }
.platforms { margin: 28px 0 0; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: color-mix(in srgb, var(--card) 70%, transparent); }
.platforms strong { display: block; font-size: 15px; letter-spacing: 0.04em; }
.platforms span { color: var(--muted); font-size: 15px; }
.contact { margin: 28px 0 0; font-size: 15px; color: var(--muted); }

/* Inner pages */
main.doc { flex: 1; padding: 40px 0 56px; }
.doc h1 { font-size: 34px; line-height: 1.15; margin: 0 0 6px; }
.doc .updated { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 13px; color: var(--muted); margin: 0 0 28px; }
.doc h2 { font-size: 21px; margin: 36px 0 8px; }
.doc p, .doc li { max-width: 40em; }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.summary { border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; background: color-mix(in srgb, var(--card) 70%, transparent); }
.doc dl { margin: 0; }
.doc dt { font-weight: 600; margin-top: 18px; }
.doc dd { margin: 4px 0 0; }

/* Footer: company details required for a UK limited company's website */
footer { border-top: 1px solid var(--line); padding: 24px 0 32px; font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; flex-direction: column; gap: 8px; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; font-family: "IBM Plex Mono", ui-monospace, monospace; }
footer nav a { color: var(--muted); }

@media (max-width: 480px) {
  body { font-size: 16px; }
  .doc h1 { font-size: 28px; }
}