:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #111214;
  --panel-2: #17191d;
  --text: #f4f6f8;
  --muted: #a8b0ba;
  --line: #30343a;
  --cyan: #00daf3;
  --pink: #ff24e4;
  --lime: #cdff13;
}

* {
  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 20% 0%, rgba(0, 218, 243, 0.18), transparent 28rem),
    radial-gradient(circle at 85% 10%, rgba(255, 36, 228, 0.14), transparent 26rem),
    linear-gradient(180deg, #08090b 0%, #050505 100%);
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

.shell,
.doc {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.shell {
  padding: 72px 0;
}

.doc {
  padding: 28px 0 72px;
}

.hero,
.panel,
.doc section,
.doc header {
  border: 1px solid var(--line);
  background: rgba(17, 18, 20, 0.82);
  border-radius: 18px;
}

.hero {
  padding: clamp(32px, 7vw, 72px);
}

.panel,
.doc section,
.doc header {
  margin-top: 18px;
  padding: 24px;
}

.topnav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding: 12px 0;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--lime);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 8vw, 72px);
}

.doc h1 {
  font-size: clamp(30px, 6vw, 54px);
}

h2 {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 20px;
}

p,
ul {
  margin: 0;
}

p + p,
p + ul,
ul + p {
  margin-top: 12px;
}

li + li {
  margin-top: 8px;
}

.lead {
  max-width: 720px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 18px;
}

.meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  font-weight: 700;
}

.button.primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #031012;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: #24272d;
  color: var(--lime);
}

hr {
  margin: 36px 0 18px;
  border: 0;
  border-top: 1px solid var(--line);
}

.english {
  border-color: rgba(255, 36, 228, 0.42);
}

.placeholder {
  color: var(--lime);
  font-weight: 700;
}

@media (max-width: 560px) {
  .shell {
    padding: 32px 0;
  }

  .hero,
  .panel,
  .doc section,
  .doc header {
    border-radius: 14px;
    padding: 18px;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    justify-content: center;
    width: 100%;
  }
}