:root {
  --bg: #0e1116;
  --surface: #171c26;
  --surface-hover: #212836;
  --text: #e6e9ef;
  --muted: #8a93a6;
  --accent: #4f8cff;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at 20% -10%, #1c2536, var(--bg) 60%);
  color: var(--text);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

h1 {
  font-size: clamp(1.8rem, 1rem + 3vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
}

#uv-form {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

#uv-address {
  flex: 1;
  padding: 0.85rem 1.1rem;
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid #2a3242;
  border-radius: var(--radius);
  outline: none;
}

#uv-address:focus {
  border-color: var(--accent);
}

#uv-form button {
  padding: 0 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.9rem;
}

.card {
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: center;
  color: var(--text);
  background: var(--surface);
  border: 1px solid #2a3242;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease;
}

.card:hover {
  background: var(--surface-hover);
  transform: translateY(-3px);
}