:root {
  --bg: #0d1117;
  --bg-elev: #161b22;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --border: #30363d;
  --accent: #4ade80;
  --accent-hover: #22c55e;
  --code-bg: #161b22;
  --link: #79c0ff;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--accent);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--fg);
}

/* hero */

.hero {
  border-bottom: 1px solid var(--border);
  padding: 3rem 0 3rem;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(74, 222, 128, 0.08), transparent 70%),
    var(--bg);
}

.hero-mark {
  font-size: 3rem;
  line-height: 1;
  margin: 0 0 0.5rem;
  filter: drop-shadow(0 4px 12px rgba(74, 222, 128, 0.25));
}

.hero h1 {
  font-size: 3.5rem;
  margin: 0 0 1rem;
  letter-spacing: -0.04em;
  color: var(--accent);
  font-weight: 700;
}

.hero .tagline {
  font-size: 1.2rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}

.ctas {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.cta {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elev);
  color: var(--fg);
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.cta:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.cta.primary {
  background: var(--accent);
  color: #0d1117;
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(74, 222, 128, 0.18);
}
.cta.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(74, 222, 128, 0.28);
}

.hero .meta {
  color: var(--fg-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* main sections */

main {
  padding: 3rem 0 4rem;
}

section {
  margin-bottom: 3.5rem;
}

h2 {
  font-size: 1.6rem;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.1rem;
  margin: 2rem 0 0.75rem;
  color: var(--fg-muted);
  font-weight: 600;
}

p { margin: 0 0 1rem; }

p.note {
  font-size: 0.9rem;
  color: var(--fg-muted);
  border-left: 2px solid var(--border);
  padding: 0.25rem 0 0.25rem 1rem;
  margin: 1rem 0;
}

/* features list */

ul.features {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

ul.features li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.85rem 1.1rem;
}

ul.features strong {
  color: var(--accent);
  font-weight: 600;
}

/* tables */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1rem;
  font-size: 0.95rem;
}

th, td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--fg-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

td:last-child, th:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

tbody tr:hover {
  background: var(--bg-elev);
}

/* lists */

main ul:not(.features) {
  padding-left: 1.5rem;
}
main ul:not(.features) li {
  margin-bottom: 0.4rem;
}

/* footer */

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

footer p { margin: 0.25rem 0; }

/* mobile */

@media (max-width: 600px) {
  .hero { padding: 2.5rem 0 2rem; }
  .hero-mark { font-size: 2.25rem; }
  .hero h1 { font-size: 2.5rem; }
  .hero .tagline { font-size: 1.05rem; }
  pre { font-size: 0.8rem; padding: 0.75rem 1rem; }
  table { font-size: 0.85rem; }
  th, td { padding: 0.4rem 0.5rem; }
}