:root {
  color-scheme: dark;
  --bg: #171918;
  --panel: #222523;
  --panel-strong: #2b302d;
  --text: #f0f2ee;
  --muted: #aab0a8;
  --line: #3a403b;
  --accent: #c4d64f;
  --accent-2: #68b8d8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(104, 184, 216, 0.18), transparent 32rem),
    linear-gradient(135deg, #171918 0%, #202421 55%, #191b1a 100%);
  color: var(--text);
  font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(23, 25, 24, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  letter-spacing: 0;
}

nav {
  display: flex;
  gap: 0.5rem;
}

nav a {
  min-width: 5.5rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 0.45rem;
  color: var(--muted);
  text-align: center;
  font-weight: 700;
}

nav a[aria-current="page"] {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4.5rem) 0;
}

.hero {
  max-width: 44rem;
  margin-bottom: 2rem;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.intro {
  max-width: 34rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.group {
  margin-top: 2.5rem;
}

h2 {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 0.8rem;
}

.tile {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-height: 5.8rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(34, 37, 35, 0.86);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.22);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.tile:hover,
.tile:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: var(--panel-strong);
  outline: none;
}

.tile.accent {
  border-color: rgba(196, 214, 79, 0.55);
}

.icon {
  display: grid;
  flex: 0 0 2.7rem;
  width: 2.7rem;
  height: 2.7rem;
  place-items: center;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #141614;
  font-weight: 900;
}

strong,
small {
  display: block;
}

strong {
  font-size: 1rem;
}

small {
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 560px) {
  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  nav a {
    flex: 1;
  }

  .tile {
    min-height: 5.2rem;
  }
}