/* ─── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }

/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --green:         #76b900;
  --green-light:   #eaf3d0;
  --green-dark:    #4a7400;

  --surface-page:  #ffffff;
  --surface-card:  #f8f8f6;
  --surface-code:  #f2f2ef;

  --text-primary:   #111110;
  --text-secondary: #555552;
  --text-muted:     #8a8a86;
  --text-link:      #185fa5;

  --border:         rgba(0, 0, 0, 0.09);
  --border-strong:  rgba(0, 0, 0, 0.16);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;

  --max-width: 1080px;
  --pad-x: 1.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-page:  #0e0e0d;
    --surface-card:  #1a1a18;
    --surface-code:  #222220;

    --text-primary:   #f0eeea;
    --text-secondary: #a8a8a2;
    --text-muted:     #666660;
    --text-link:      #6ab0f5;

    --border:         rgba(255, 255, 255, 0.08);
    --border-strong:  rgba(255, 255, 255, 0.14);

    --green-light:   #1e2e06;
    --green-dark:    #a8d84a;
  }
}

/* ─── Base ───────────────────────────────────────────────────────────────── */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
}

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

/* ─── Layout ─────────────────────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section {
  padding: 3rem 0;
  border-bottom: 0.5px solid var(--border);
}
.section:last-child { border-bottom: none; }

.section-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ─── Nav ────────────────────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-page);
  border-bottom: 0.5px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 52px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 14px;
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo svg { width: 22px; height: 22px; }

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
  flex: 1;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0 0.875rem;
  height: 52px;
  display: flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text-primary);
  border-bottom-color: var(--green);
}

.nav-gh {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 5px 12px;
  border: 0.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.nav-gh:hover { background: var(--surface-card); text-decoration: none; color: var(--text-primary); }
.nav-gh i { font-size: 16px; }

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  padding: 4rem 0 3.5rem;
  border-bottom: 0.5px solid var(--border);
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  max-width: 640px;
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 560px;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 99px;
  border: 0.5px solid var(--border-strong);
  color: var(--text-secondary);
  background: var(--surface-card);
}

/* ─── Cards shared ───────────────────────────────────────────────────────── */
.card {
  background: var(--surface-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.125rem 1.25rem;
  transition: border-color 0.15s;
}
.card:hover { border-color: var(--border-strong); }

/* ─── Library grid ───────────────────────────────────────────────────────── */
.lib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.lib-card { display: flex; flex-direction: column; }

.lib-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  margin-bottom: 0.75rem;
  flex-shrink: 0;
}

.lib-name {
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 5px;
}

.lib-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}

.lib-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  margin-top: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  align-self: flex-start;
}

/* ─── Two-column cards ───────────────────────────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 600px) { .two-col { grid-template-columns: 1fr; } }

.big-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.big-card-title i { font-size: 16px; color: var(--text-link); }

.big-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.repo-row {
  display: flex;
  align-items: center;
  padding: 6px 0;
  border-top: 0.5px solid var(--border);
  gap: 8px;
}

.repo-name {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-link);
  flex: 1;
}

.repo-stars {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 3px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-family: var(--font-sans);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  border: 0.5px solid var(--border-strong);
  color: var(--text-primary);
  background: var(--surface-page);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.btn:hover { background: var(--surface-card); text-decoration: none; }
.btn i { font-size: 14px; }

/* ─── Kit section ────────────────────────────────────────────────────────── */
.kit-card {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

@media (max-width: 600px) { .kit-card { flex-direction: column; } }

.kit-content { flex: 1; }

.kit-snippet {
  min-width: 200px;
  background: var(--surface-code);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  flex-shrink: 0;
}

.kit-snippet-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.kit-snippet code {
  display: block;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  line-height: 2;
}

.kit-snippet code .cmd { color: var(--green-dark); }

@media (prefers-color-scheme: dark) {
  .kit-snippet code .cmd { color: #a8d84a; }
}

/* ─── Learning grid ──────────────────────────────────────────────────────── */
.learn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.learn-card { display: flex; flex-direction: column; }

.learn-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.learn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.learn-name {
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.learn-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}

.learn-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 0.5px solid var(--border);
}

.learn-stars {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
}
.learn-stars i { font-size: 12px; }

.learn-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-link);
  text-decoration: none;
}
.learn-link:hover { text-decoration: underline; }
.learn-link i { font-size: 11px; }

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 0.5px solid var(--border);
  padding: 2rem 0;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}

.footer-links a {
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--text-secondary); }

/* ─── Utility ────────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .lib-grid { grid-template-columns: 1fr 1fr; }
  .learn-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}