:root {
  --bg: #0b0b0c;
  --bg-high: #141416;
  --surface: #1a1a1d;
  --outline: #2a2a2f;
  --text: #f4f2ef;
  --muted: #a9a9b1;
  --primary: #ff7a1f;
  --primary-soft: #ff7a1f1f;
  --shadow: 0 24px 80px -20px rgba(255, 122, 31, 0.18),
            0 2px 8px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 700px at 12% -6%, #24140a 0%, var(--bg) 52%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
               Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 31, 0.35);
  transition: border-color 140ms ease, color 140ms ease;
}

a:hover { border-color: var(--primary); color: #ffae7f; }

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 72px 28px 120px;
}

.hero {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 36px;
}

.logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background:
    radial-gradient(120% 120% at 30% 25%, #ffd9bc 0%, #ff8b3f 45%, #8e2c00 100%);
  box-shadow: var(--shadow);
  flex-shrink: 0;
  display: grid;
  place-items: center;
  color: #201006;
  font-weight: 800;
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
               monospace;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.brand {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
               monospace;
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin: 8px 0 0;
}

h1 .accent {
  color: var(--primary);
}

.updated {
  margin-top: 18px;
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
               monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.intro {
  margin-top: 28px;
  padding: 22px 24px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--outline);
}

.intro p { margin: 0; color: var(--muted); }

h2 {
  margin: 56px 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--outline);
  font-size: 20px;
  letter-spacing: -0.01em;
  font-weight: 700;
}

h3 {
  margin: 28px 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

p, li { color: #dcdbd6; }

ul, ol { padding-left: 22px; }
ul li, ol li { margin: 6px 0; }

.callout {
  margin: 20px 0;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid rgba(255, 122, 31, 0.3);
  background: var(--primary-soft);
  color: #f7cba7;
  font-size: 14px;
}

.callout strong { color: var(--primary); letter-spacing: 0.04em; }

.footer {
  margin-top: 72px;
  padding-top: 24px;
  border-top: 1px solid var(--outline);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.footer a { color: var(--muted); border-bottom-color: transparent; }
.footer a:hover { color: var(--primary); }

.toc {
  margin-top: 28px;
  padding: 20px 24px;
  border-radius: 16px;
  background: var(--bg-high);
  border: 1px solid var(--outline);
}

.toc-title {
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
               monospace;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

.toc ol { margin: 0; padding-left: 20px; }
.toc ol li { margin: 4px 0; }
.toc ol li a { border: none; }

@media (max-width: 520px) {
  .container { padding: 52px 20px 100px; }
  h1 { font-size: 32px; }
  h2 { font-size: 18px; margin-top: 42px; }
}