html, body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #5f72be, #9b23ea);
  color: #fff;
  min-height: 100vh;
  height: auto;
  overflow-x: hidden;
}

body {
  padding: 40px 20px;
  box-sizing: border-box;
}

.main-container {
  width: 100%;
  max-width: 450px;
  margin: 0 auto;
  padding: 20px;
  margin-top: 100px;
  margin-bottom: 100px;
}

.register-box {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 30px;
  border-radius: 15px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.register-box h2 {
  text-align: center;
  margin-bottom: 25px;
  font-weight: 600;
}

.btn-login {
  background-color: #ffc107;
  color: #000;
  font-weight: 600;
  width: 100%;
}

.btn-login:hover {
  background-color: #e0a800;
}

.back-link {
  color: #fff;
  font-size: 0.9rem;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}