:root {
  color-scheme: dark;
  --bg: #07080d;
  --panel: rgba(17, 19, 31, 0.78);
  --line: rgba(255, 255, 255, 0.12);
  --muted: #a0a5b7;
  --text: #f4f5fb;
  --violet: #c3b2ff;
  --cyan: #6fe8e0;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(123, 82, 255, 0.19), transparent 30rem),
    radial-gradient(circle at 100% 70%, rgba(34, 205, 196, 0.09), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.shell {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(195, 178, 255, 0.55);
  border-radius: 10px;
  color: var(--violet);
  font-size: 10px;
  letter-spacing: -0.08em;
}

nav { display: inline-flex; gap: 16px; color: var(--muted); font-size: 11px; }
nav a { text-underline-offset: 3px; }
nav a:hover, nav a:focus-visible { color: var(--cyan); }

main { padding-top: clamp(54px, 9vw, 96px); }

.eyebrow {
  margin: 0 0 18px;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  letter-spacing: -0.075em;
  line-height: 0.95;
}

.intro {
  max-width: 710px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.7vw, 1.2rem);
  line-height: 1.75;
}

.updated { margin-top: 17px; color: #777d92; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }

.card {
  margin-top: 48px;
  padding: clamp(24px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.26);
}

section + section { margin-top: 42px; }

h2 { margin: 0 0 14px; color: var(--violet); font-size: 1.18rem; letter-spacing: -0.02em; }
h3 { margin: 25px 0 9px; font-size: 0.96rem; }
p, li { color: var(--muted); font-size: 0.98rem; line-height: 1.78; }
ul { margin: 10px 0 0; padding-left: 1.25rem; }
li + li { margin-top: 7px; }
strong { color: var(--text); }
code { padding: 2px 5px; border: 1px solid var(--line); border-radius: 5px; color: var(--cyan); font-size: 0.9em; }

.contact {
  display: inline-flex;
  margin-top: 8px;
  color: var(--cyan);
  text-underline-offset: 4px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 28px;
  color: #71768a;
  font-size: 10px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  text-transform: uppercase;
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 980px); padding-top: 18px; }
  .topbar, footer { align-items: flex-start; flex-direction: column; }
  nav { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }