:root {
  --bg: #0b0e14;
  --bg-elev: #131822;
  --fg: #e6e9ef;
  --muted: #9aa3b2;
  --accent: #6ee7b7;
  --accent-dim: #14b88a;
  --border: #232a36;
  --max: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Language bar */
.lang-bar {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  padding-top: 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lang-bar a {
  color: var(--muted);
  text-decoration: none;
  padding: 4px 6px;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.lang-bar a:hover { color: var(--fg); }
.lang-bar a[aria-current="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Hero */
.hero {
  padding: 56px 0 64px;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(1200px 400px at 50% -100px, rgba(110, 231, 183, 0.12), transparent 70%);
}
.hero.compact { padding: 36px 0 32px; }

.hero-head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 18px;
}
.hero-head h1 { margin: 0; }
.hero.compact .hero-head { gap: 16px; margin-bottom: 14px; }

.logo {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  background: var(--bg-elev);
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
}
.hero.compact .logo { width: 54px; height: 54px; border-radius: 12px; }

.hero h1 {
  font-size: 56px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  background: linear-gradient(180deg, #ffffff 0%, #b5c0d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero.compact h1 { font-size: 32px; }
.tagline {
  font-size: 22px;
  color: var(--fg);
  margin: 0 0 8px;
}
.sub {
  color: var(--muted);
  margin: 0 0 28px;
  max-width: 620px;
}
.crumb {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 14px;
}
.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover { color: var(--fg); }

.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--accent);
  color: #082019;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background .15s ease, transform .15s ease;
}
.button:hover { background: var(--accent-dim); }
.button.outline {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.button.outline:hover { border-color: var(--accent); color: var(--accent); }

main { padding: 56px 0 80px; }
section + section { margin-top: 56px; }

h2 {
  font-size: 26px;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}
h3 { font-size: 18px; margin: 28px 0 10px; }
p { margin: 0 0 14px; }
ul { margin: 0 0 18px; padding-left: 22px; }
li { margin-bottom: 8px; }
a { color: var(--accent); }
a:hover { color: var(--accent-dim); }

code {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.features li strong { color: var(--accent); }

/* Per-edition build cards on the index page. */
.builds {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}
.build {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.build h3 {
  margin: 0;
  font-size: 17px;
  color: var(--accent);
}
.build p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  flex: 1;
}
.build code {
  font-size: 12px;
  word-break: break-all;
}
.build .button {
  align-self: flex-start;
  padding: 8px 14px;
  font-size: 14px;
}
@media (max-width: 600px) {
  .builds { grid-template-columns: 1fr; }
}

.callout {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
}
.callout h2 { margin-top: 0; }

.prose { max-width: 720px; }
.prose h2 { margin-top: 36px; }
.prose h2:first-of-type { margin-top: 8px; }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 56px;
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); text-decoration: none; margin: 0 4px; }
footer a:hover { color: var(--fg); }

/* Root language picker */
.picker {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
}
.picker-inner {
  max-width: 480px;
  text-align: center;
}
.picker .logo {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin: 0 auto 24px;
  display: block;
}
.picker h1 {
  font-size: 42px;
  margin: 0 0 6px;
  background: linear-gradient(180deg, #ffffff 0%, #b5c0d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.picker .pick-sub { color: var(--muted); margin: 0 0 28px; }
.picker-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.picker-grid a {
  display: block;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elev);
  color: var(--fg);
  text-decoration: none;
  font-weight: 500;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.picker-grid a:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.picker-grid a small {
  display: block;
  color: var(--muted);
  font-weight: 400;
  font-size: 13px;
  margin-top: 2px;
}

@media (max-width: 600px) {
  .hero h1 { font-size: 38px; }
  .hero.compact h1 { font-size: 26px; }
  .tagline { font-size: 18px; }
  .hero-head { flex-direction: row; }
  .logo { width: 64px; height: 64px; }
}