* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(to right, #e0f7fa, #ffffff);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 20px;
}

form {
  background: white;
  padding: 40px 30px;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

form h2 {
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: #333;
}

input[type="url"] {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 6px;
  transition: border-color 0.3s;
}

input[type="url"]:focus {
  border-color: #0078d7;
  outline: none;
}

button {
  background: #0078d7;
  color: white;
  font-size: 1rem;
  padding: 12px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
  transition: background 0.3s;
}

button:hover {
  background: #005ea1;
}

.note {
  margin-top: 15px;
  font-size: 0.9rem;
  color: #777;
}

footer {
  background-color: #0078d7;
  color: white;
  text-align: center;
  padding: 15px 0;
  font-size: 1rem;
  font-weight: 500;
  box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.2);
}