:root {
  --bg: #0b0e14;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ebf1;
  --muted: #9aa3b2;
  --dim: #5f6878;
  --accent: #5eead4;
  --accent-2: #a78bfa;
  --glow-a: rgba(45, 212, 191, 0.22);
  --glow-b: rgba(139, 92, 246, 0.18);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7f9;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-hover: #ffffff;
    --border: rgba(15, 23, 42, 0.08);
    --text: #0f172a;
    --muted: #4b5565;
    --dim: #8a93a3;
    --accent: #0d9488;
    --accent-2: #7c3aed;
    --glow-a: rgba(45, 212, 191, 0.25);
    --glow-b: rgba(139, 92, 246, 0.16);
  }
}

* { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Soft northern-lights glow behind the top of the page */
.aurora {
  position: fixed;
  inset: -20vh -10vw auto -10vw;
  height: 75vh;
  z-index: -1;
  background:
    radial-gradient(40% 60% at 25% 40%, var(--glow-a), transparent 70%),
    radial-gradient(35% 55% at 75% 30%, var(--glow-b), transparent 70%);
  filter: blur(40px);
  animation: drift 18s ease-in-out infinite alternate;
}

@keyframes drift {
  to { transform: translate3d(3vw, 2vh, 0) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
  .aurora { animation: none; }
}

.top, main, footer {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
}

.mark {
  font: 700 15px/1 "Space Grotesk", sans-serif;
  letter-spacing: 0.08em;
  color: var(--text);
  text-decoration: none;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

nav { display: flex; gap: 24px; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

nav a:hover { color: var(--text); }

main { flex: 1; }

.hero { padding: 120px 0 88px; }

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

h1 {
  font: 700 clamp(44px, 8vw, 88px)/0.98 "Space Grotesk", sans-serif;
  letter-spacing: -0.035em;
  background: linear-gradient(120deg, var(--text) 40%, var(--accent) 75%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  max-width: 540px;
  margin-top: 28px;
  font-size: 18px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-bottom: 96px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(12px);
  scroll-margin-top: 24px;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.card:hover {
  background: var(--surface-hover);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  transform: translateY(-2px);
}

.card-head { display: flex; align-items: center; gap: 12px; }

.icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
}

.icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

h2 { font: 600 20px/1.2 "Space Grotesk", sans-serif; }

.card p { color: var(--muted); font-size: 15px; flex: 1; }

.soon {
  align-self: flex-start;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--dim);
  padding: 5px 10px;
  border: 1px dashed var(--border);
  border-radius: 999px;
}

footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 28px;
  padding-bottom: 36px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

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

/* A whole card that is a link (e.g. Apper -> library) */
.card-link { color: inherit; text-decoration: none; cursor: pointer; }

.open {
  align-self: flex-start;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  transition: transform 0.15s;
}

.open::after { content: " →"; }

.card-link:hover .open { transform: translateX(3px); }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .top, main, footer { padding-left: 16px; padding-right: 16px; }
  nav { gap: 16px; }
  .hero { padding: 72px 0 56px; }
  .lede { font-size: 16px; }
}