/* -------------------------------------------------------------
 * wavde.github.io: minimal, fast, dark-first with light fallback.
 * ------------------------------------------------------------- */

/* --- Design tokens --- */
:root {
  --bg: #0b0f17;
  --bg-elev: #121826;
  --bg-card: #131a2a;
  --border: #23304a;
  --border-strong: #32406a;
  --text: #e9eef9;
  --muted: #97a3bb;
  --accent: #7aa7ff;
  --accent-2: #b28cff;

  --max-width: 1040px;
  --radius: 12px;
  --radius-sm: 8px;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --ease: cubic-bezier(.2, .6, .2, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfcfe;
    --bg-elev: #ffffff;
    --bg-card: #ffffff;
    --border: #e4e9f2;
    --border-strong: #cdd4e2;
    --text: #0b0f17;
    --muted: #596275;
    --accent: #2552c9;
    --accent-2: #7a44d1;
  }
}

* { box-sizing: border-box; }
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

html { scroll-behavior: smooth; scroll-padding-top: 24px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-thickness: 1.5px; text-underline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 12px;
  border-radius: 0 0 6px 0;
  z-index: 1000;
}
.skip:focus { left: 0; top: 0; }

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

/* --- Hero --- */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 60% 80% at 85% -10%, rgba(122, 167, 255, 0.18), transparent 60%),
    radial-gradient(ellipse 50% 70% at 10% 0%, rgba(178, 140, 255, 0.14), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 80px;
  overflow: hidden;
}

nav[aria-label="Primary"] {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
}
nav .brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
  letter-spacing: 1px;
}
nav .brand:hover { text-decoration: none; }
nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0; padding: 0;
}
nav a {
  color: var(--muted);
  font-size: 14.5px;
  transition: color .15s var(--ease);
}
nav a:hover { color: var(--text); text-decoration: none; }
nav .nav-ext { color: var(--text); }

.hero-content {
  padding: 60px 0 0;
  max-width: 780px;
}
.eyebrow {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin: 0 0 20px;
}
.hero-content h1 {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  font-weight: 600;
}
.lede {
  font-size: 19px;
  color: var(--muted);
  max-width: 680px;
  margin: 0 0 32px;
}
.lede a { color: var(--text); border-bottom: 1px solid var(--border-strong); }
.lede a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform .1s var(--ease), background .15s var(--ease), border-color .15s var(--ease);
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary {
  background: var(--accent);
  color: #fff;
}
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Proof strip */
.proof {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 40px;
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--border);
  max-width: 600px;
}
.proof > div { margin: 0; }
.proof dt {
  font-size: 28px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin: 0;
}
.proof dd {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.35;
}

/* --- Sections --- */
main section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}
main section:last-of-type { border-bottom: 0; }

.section-head { margin-bottom: 32px; }
h2 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--text);
}
.section-sub {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* --- Project grid --- */
.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .15s var(--ease), transform .15s var(--ease);
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}
.card h3 {
  margin: 0;
  font-size: 16.5px;
  font-family: var(--mono);
  font-weight: 600;
  line-height: 1.3;
}
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); text-decoration: none; }
.card-body {
  color: var(--muted);
  font-size: 14.5px;
  margin: 0 0 16px;
  flex: 1;
}
.card code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--bg-elev);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text);
}

.pill {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  letter-spacing: 0.3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.pill-outline {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border-strong);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tag-row li {
  font-family: var(--mono);
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--muted);
}

/* --- Posts list --- */
.posts {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
  counter-reset: none;
}
.posts li {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color .15s var(--ease);
}
.posts li:hover { border-color: var(--border-strong); }
.posts li a {
  font-weight: 600;
  color: var(--text);
  font-size: 15.5px;
  line-height: 1.4;
}
.posts li a:hover { color: var(--accent); text-decoration: none; }
.posts li p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* --- Links list --- */
.links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.links li a {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  background: var(--bg-card);
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.links li a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* --- Footer --- */
footer {
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }

/* --- Responsive --- */
@media (max-width: 640px) {
  nav ul { gap: 16px; }
  nav .nav-ext { display: none; }
  .hero-content { padding: 40px 0 0; }
  .hero { padding-bottom: 60px; }
  main section { padding: 56px 0; }
  .proof { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .proof dt { font-size: 24px; }
  .proof dd { font-size: 12px; }
  .card { padding: 20px; }
}

@media print {
  nav, footer, .cta-row, .proof, .skip { display: none; }
  body { background: #fff; color: #000; }
  .hero { background: none; padding: 20px 0; border: 0; }
  .card, .posts li { break-inside: avoid; }
  a { color: #000; text-decoration: underline; }
}