:root {
  --background: 36 8% 99%;
  --foreground: 193 52% 15%;
  --card: 48 100% 99%;
  --card-foreground: 193 52% 15%;
  --primary: 184 61% 34%;
  --primary-foreground: 36 8% 99%;
  --primary-hover: 184 66% 25%;
  --muted: 33 20% 94%;
  --muted-foreground: 196 11% 40%;
  --border: 33 20% 80%;
  --ring: 184 61% 34%;
  --radius: 0.5rem;
}

* {
  box-sizing: border-box;
  border-color: hsl(var(--border));
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

main {
  width: 100%;
  max-width: 56rem;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 3rem;
  line-height: 1;
  font-weight: 700;
}

.sub {
  margin: 1rem 0 0;
  font-size: 1.25rem;
  color: hsl(var(--muted-foreground));
}

.tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 2rem 0;
}

.tile {
  padding: 1.5rem;
  background: hsl(var(--card));
  color: hsl(var(--card-foreground));
  border: 1px solid hsl(var(--border) / 0.4);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  transition: border-color 0.15s;
}

.tile:hover {
  border-color: hsl(var(--primary) / 0.5);
}

.tile .icon {
  width: 2rem;
  height: 2rem;
  margin: 0 auto 0.75rem;
  color: hsl(var(--primary));
}

.tile h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.tile p {
  margin: 0;
  font-size: 0.875rem;
  color: hsl(var(--muted-foreground));
}

.foot {
  margin: 0;
  font-size: 0.875rem;
  color: hsl(var(--muted-foreground));
}

@media (min-width: 768px) {
  h1 { font-size: 3.75rem; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .tiles { grid-template-columns: repeat(4, 1fr); }
}