body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, sans-serif;
  background: #10141f;
  color: #ffffff;
}

main {
  width: min(900px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
}

h1 {
  text-align: center;
  font-size: 3rem;
  margin: 0 0 1.5rem;
}

input {
  display: block;
  width: min(400px, 100%);
  margin: 0 auto 2rem;
  padding: 0.8rem 1rem;
  border: 1px solid #2a3550;
  border-radius: 999px;
  background: #171d2b;
  color: white;
  font-size: 1rem;
}

#links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.8rem;
}

.link-card {
  display: block;
  padding: 1.2rem;
  border-radius: 0.8rem;
  background: #171d2b;
  color: #66c0f4;
  text-align: center;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 700;
}

.link-card:hover,
.link-card:focus {
  background: #20283a;
}

.error {
  color: #ff7b7b;
  text-align: center;
}