:root {
  --bg: #0f1216;
  --bg-elevated: #161b22;
  --panel: #1a1f26;
  --border: #2a313a;
  --text: #e8ecf0;
  --muted: #9aa3ad;
  --accent: #3d9a6a;
  --accent-soft: rgba(61, 154, 106, 0.14);
  --link: #6bc495;
  --link-hover: #8fd6b0;
  --radius: 12px;
  --max: 42rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(61, 154, 106, 0.18), transparent),
    var(--bg);
  color: var(--text);
  font-family: "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--link-hover);
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 18, 22, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header-inner,
.site-footer-inner,
.page {
  max-width: calc(var(--max) + 2rem);
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.brand-mark {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 6px;
  background: linear-gradient(145deg, #4db87e, #2f7a53);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--link);
}

.page {
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}

.hero {
  margin-bottom: 2rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero .lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

.meta {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

@media (min-width: 560px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  display: block;
  padding: 1.25rem 1.35rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  background: var(--bg-elevated);
  color: inherit;
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  color: var(--link);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

section {
  margin-bottom: 2rem;
}

section h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

section h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
}

section p,
section ul {
  margin: 0 0 0.85rem;
  color: var(--text);
}

section ul {
  padding-left: 1.25rem;
}

section li {
  margin-bottom: 0.4rem;
}

section li::marker {
  color: var(--accent);
}

.note {
  margin: 1.25rem 0;
  padding: 1rem 1.15rem;
  background: var(--accent-soft);
  border: 1px solid rgba(61, 154, 106, 0.35);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
}

.note strong {
  color: var(--link);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--link);
}