body {
  font-family: Arial, sans-serif;
  background: #f5f6fa;
  text-align: center;
  margin: 0;
  padding: 0;
}

.top-card {
  margin-top: 30px;
}

.top-card a {
  background: #2ecc71;
  color: white;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 16px;
  display: inline-block;
}

.card {
  width: 350px;
  margin: 30px auto;
  border-radius: 15px;
  overflow: hidden;
  background: white;
  box-shadow: 0px 4px 15px rgba(0,0,0,0.2);
}

.card-header {
  padding: 25px;
  color: white;
  background: linear-gradient(to right, #ff4fd8, #4a6cf7);
}

.card-header h1 {
  margin: 0;
}

.card-body {
  padding: 20px;
}

input, select {
  width: 90%;
  padding: 12px;
  margin: 12px 0;
  border-radius: 10px;
  border: 1px solid #ddd;
  font-size: 15px;
}

button {
  width: 90%;
  padding: 12px;
  margin-top: 15px;
  border: none;
  border-radius: 10px;
  background: #27ae60;
  color: white;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #219150;
}

.popup {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
}

.popup-box {
  background: white;
  width: 320px;
  padding: 25px;
  border-radius: 15px;
  margin: 150px auto;
}

.close-btn {
  background: #e74c3c;
}