/* ---- tokens ------------------------------------------------------------ */
:root {
  color-scheme: dark light;

  --bg: #0f1117;
  --bg-panel: #161a23;
  --fg: #e6e8ee;
  --fg-muted: #a0a7b8;
  --accent: #5eead4;
  --border: #262c3a;

  --wrap: 68rem;
  --radius: 0.75rem;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfbfd;
    --bg-panel: #ffffff;
    --fg: #171a21;
    --fg-muted: #565e70;
    --accent: #0d9488;
    --border: #e3e6ed;
  }
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 0.35rem;
  padding: 0.1em 0.35em;
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem;
  z-index: 10;
  padding: 0.5rem 0.85rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ---- header ------------------------------------------------------------ */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 5;
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}
.brand-mark { font-family: var(--font-mono); color: var(--accent); }

.nav {
  display: flex;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav a { color: var(--fg-muted); text-decoration: none; }
.nav a:hover, .nav a:focus-visible { color: var(--fg); }

/* ---- content ----------------------------------------------------------- */
.hero { padding-block: clamp(3rem, 8vw, 6rem) 2rem; }

h1 {
  font-size: clamp(2.1rem, 1.4rem + 3.2vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}
h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.8vw, 1.9rem);
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
}
h3 { font-size: 1.1rem; margin: 0 0 0.4rem; }

.accent { color: var(--accent); }

.lede {
  max-width: 48ch;
  color: var(--fg-muted);
  font-size: 1.125em;
  margin: 0 0 1.75rem;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0; }

.button {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transition: transform 120ms ease, opacity 120ms ease;
}
.button:hover { transform: translateY(-1px); opacity: 0.92; }
.button-ghost { background: transparent; color: var(--accent); }

.panel { padding-block: 2.5rem; border-top: 1px solid var(--border); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}
.card {
  padding: 1.25rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.card p { color: var(--fg-muted); margin: 0; }

/* ---- footer ------------------------------------------------------------ */
.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.site-footer .wrap { padding-block: 1.5rem; }