:root {
  color-scheme: dark;
  --ink: #040608;
  --panel: rgba(18, 25, 31, 0.94);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f5fbff;
  --muted: rgba(245, 251, 255, 0.68);
  --signal: #a3afad;
  --grid: rgba(255, 255, 255, 0.035);
  --edge-glow: rgba(163, 175, 173, 0.56);
  --edge-glow-soft: rgba(163, 175, 173, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    var(--ink);
  background-size: 36px 36px;
  color: var(--text);
}

a {
  color: inherit;
}

.shell,
.topbar,
.footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 20px 0;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  text-decoration: none;
  font-weight: 800;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 14px;
}

.nav a {
  text-decoration: none;
}

.hero {
  padding: 74px 0 28px;
}

.eyebrow {
  color: var(--signal);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 12px 0 18px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin: 34px 0 10px;
  font-size: clamp(24px, 3vw, 34px);
}

h3 {
  margin: 22px 0 8px;
  font-size: 20px;
}

p,
li {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.lead {
  max-width: 740px;
  font-size: 20px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 26px 0 50px;
}

.card,
.content {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.card::before,
.content::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  z-index: 0;
  width: 148px;
  height: 92px;
  border-top-left-radius: inherit;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--edge-glow), transparent 78%) left top / 100% 1px no-repeat,
    linear-gradient(180deg, var(--edge-glow), transparent 82%) left top / 1px 100% no-repeat;
  filter: drop-shadow(0 0 10px var(--edge-glow-soft));
  opacity: 0.9;
}

.card::after,
.content::after {
  content: "";
  position: absolute;
  top: -28px;
  left: -28px;
  z-index: 0;
  width: 160px;
  height: 120px;
  pointer-events: none;
  background: radial-gradient(circle at 24px 24px, var(--edge-glow-soft), transparent 62%);
}

.card > *,
.content > * {
  position: relative;
  z-index: 1;
}

.card {
  display: grid;
  gap: 8px;
  padding: 20px;
  text-decoration: none;
}

.card strong {
  font-size: 22px;
}

.card span {
  color: var(--muted);
  line-height: 1.45;
}

.content {
  padding: clamp(22px, 4vw, 36px);
  margin-bottom: 42px;
}

.content :first-child {
  margin-top: 0;
}

.meta {
  display: inline-flex;
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 640px) {
  .topbar,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 48px;
  }
}