:root {
  --bg: #090a0f;
  --surface: #0f1118;
  --text: #f7f7fb;
  --muted: #a9adbb;
  --line: rgba(255, 255, 255, 0.1);
  --purple: #8b5cf6;
  --light: #c4b5fd;
  --page: min(860px, calc(100% - 40px));
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 85% 3%, rgba(139, 92, 246, 0.14), transparent 26rem), var(--bg);
  font: 400 16px/1.75 "Inter", sans-serif;
}

a { color: var(--light); }
a:focus-visible { outline: 3px solid #67e8f9; outline-offset: 4px; }

.header,
main,
footer {
  width: var(--page);
  margin: auto;
}

.header {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font: 800 15px/1 "Manrope", sans-serif;
  letter-spacing: -0.02em;
}

.brand img { border-radius: 50%; }
.brand strong { color: var(--light); }
.back { color: var(--muted); font-size: 13px; text-decoration: none; }
.back:hover { color: #fff; }

main { padding: 72px 0 96px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--light);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Manrope", sans-serif;
  line-height: 1.2;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  letter-spacing: -0.05em;
}

.updated { color: var(--muted); font-size: 12px; }
.intro { max-width: 720px; color: var(--muted); font-size: 17px; }

article {
  margin-top: 48px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}

section + section {
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

h2 { margin: 0 0 12px; font-size: 20px; letter-spacing: -0.02em; }
p,
li { color: var(--muted); }
ul { padding-left: 22px; }
li + li { margin-top: 8px; }

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
  color: #8e89a3;
  font-size: 11px;
}

footer nav { display: flex; gap: 18px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: #fff; }
.footer-credit { min-height: 40px; display: inline-flex; align-items: center; gap: 9px; margin-top: 5px; color: #8f94a5; text-decoration: none; }
.footer-credit:hover { opacity: 0.82; }
.footer-credit img { width: 102px; height: 24px; }

@media (max-width: 640px) {
  :root { --page: min(calc(100% - 32px), 860px); }
  main { padding-top: 52px; }
  article { padding: 24px; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}