:root {
  color-scheme: dark;
  --bg: #070909;
  --panel: #101616;
  --text: #eef3ef;
  --muted: #a8b4ae;
  --line: #293433;
  --accent: #e63d32;
  --lcd: #9fcfca;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0%, rgba(159, 207, 202, 0.16), transparent 34rem),
    var(--bg);
  line-height: 1.55;
}

.page {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 38px;
}

.mark {
  width: 48px;
  height: 48px;
  border-radius: 15px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.24), transparent 42%),
    linear-gradient(135deg, var(--lcd), #5c9792);
  border: 3px solid #121919;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.12);
  position: relative;
}

.mark::before {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  top: 8px;
  bottom: 8px;
  border-left: 5px solid #0d2424;
  border-right: 5px solid #0d2424;
  transform: skewX(-12deg);
}

.mark::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 9px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
}

.brand h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  letter-spacing: 0;
}

.brand p {
  margin: 6px 0 0;
  color: var(--muted);
}

nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

a {
  color: var(--lcd);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

nav a {
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  background: rgba(255, 255, 255, 0.04);
}

main {
  background: rgba(16, 22, 22, 0.86);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: clamp(20px, 4vw, 34px);
}

h2 {
  margin: 28px 0 10px;
  font-size: 22px;
}

h2:first-child {
  margin-top: 0;
}

p,
li {
  color: var(--muted);
}

ul {
  padding-left: 22px;
}

.callout {
  border-left: 4px solid var(--accent);
  padding: 12px 14px;
  background: rgba(230, 61, 50, 0.08);
  border-radius: 8px;
}

footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
}