* {
  box-sizing: border-box;
}

body {
  background: #111827;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #1f2937;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 0 25px rgba(0,0,0,0.3);
  width: 90%;
  max-width: 400px;
  text-align: center;
}

h2 {
  margin-bottom: 20px;
}

input[type="url"] {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  font-size: 16px;
  margin-top: 10px;
}

button {
  margin-top: 15px;
  padding: 12px 25px;
  border: none;
  background-color: #3b82f6;
  color: white;
  font-size: 16px;
  border-radius: 10px;
  cursor: pointer;
  width: 100%;
}

button:hover {
  background-color: #2563eb;
}

a {
  color: #3b82f6;
  text-decoration: none;
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

#continuar {
  display: none;
  margin-top: 20px;
}