body {
  background: linear-gradient(to right, #fff, #fbeaea);
  min-height: 100vh;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
}

.header {
  width: 100%;
  padding: 20px 0;
  background: linear-gradient(to right, #990000, #ff6666);
  color: white;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.header img {
  max-height: 200px;
  width: auto;
  margin: 0 auto 1px;
  display: block;
}

form {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 520px;
  margin: 40px auto;
  box-sizing: border-box;
}

form h2 {
  text-align: center;
  margin-bottom: 30px;
  color: #cc0000;
}

form label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  color: #b30000;
}

form input {
  width: 100%;
  padding: 14px;
  border: 2px solid #ffd6d6;
  border-radius: 8px;
  margin-bottom: 20px;
  box-sizing: border-box;
  transition: 0.3s;
}

form input:focus {
  border-color: #ff4d4d;
}

form button {
  width: 100%;
  padding: 14px;
  background: linear-gradient(to right, #e60000, #ff6666);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(230, 0, 0, 0.3);
  transition: all 0.3s ease;
}

form button:hover {
  filter: brightness(1.1);
}

/* Éxito */
.card {
  background: #fff;
  padding: 36px 32px;
  border-radius: 18px;
  box-shadow: 0 12px 40px rgba(200, 0, 0, 0.1);
  text-align: center;
  max-width: 95vw;
  width: 340px;
  border-top: 6px solid #cc0000;
  margin: auto;
}

.card h2 {
  color: #b30000;
  margin-bottom: 16px;
  font-size: 2rem;
}

.card p {
  color: #222;
  font-size: 1.1rem;
  margin-bottom: 26px;
}

.card .check {
  font-size: 52px;
  color: #1dbb5f;
  margin-bottom: 18px;
  display: block;
}

.card a {
  background: linear-gradient(to right, #e60000, #ff6666);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 36px;
  font-size: 1rem;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 2px 12px rgba(200, 0, 0, 0.09);
  transition: filter 0.18s;
  display: inline-block;
}

.card a:hover {
  filter: brightness(1.07);
}