:root {
  --bg: #0b0b0c;
  --surface: #141416;
  --text: #e9e9ec;
  --text-secondary: #b2b2b8;
  --text-tertiary: #7a7a82;
  --accent: #5fc4d4;
  --border: #25252a;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
  margin-bottom: 40px;
}

header .brand {
  display: inline-block;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
}

header .brand:hover {
  color: var(--accent);
}

h1 {
  font-size: 32px;
  font-weight: 700;
  margin: 24px 0 8px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 48px 0 16px;
  line-height: 1.3;
  letter-spacing: -0.005em;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text);
}

p, ul, ol {
  margin: 0 0 16px;
  color: var(--text-secondary);
}

ul, ol {
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
}

li > strong {
  color: var(--text);
  font-weight: 600;
}

a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-word;
}

a:hover {
  text-decoration: underline;
}

strong {
  color: var(--text);
  font-weight: 600;
}

.meta {
  color: var(--text-tertiary);
  font-size: 14px;
  margin: 0;
}

.meta + .meta {
  margin-top: 4px;
}

.lead {
  font-size: 17px;
  color: var(--text);
  margin: 24px 0 32px;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-tertiary);
}

footer a {
  margin-right: 16px;
}

.contact-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 16px;
}

.contact-block p {
  margin: 4px 0;
  color: var(--text);
}

@media (max-width: 600px) {
  main {
    padding: 32px 18px 64px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 19px;
    margin: 36px 0 12px;
  }

  body {
    font-size: 15px;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --surface: #f7f7f8;
    --text: #18181b;
    --text-secondary: #3f3f46;
    --text-tertiary: #71717a;
    --border: #e4e4e7;
    --accent: #0891b2;
  }
}