body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: url('https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D') center/cover;
  position: relative;
}

body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
  position: relative;
  z-index: 1;
}

.auth-box {
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.1);
  text-align: center;
  animation: fadeInUp 0.5s ease-in-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.auth-box h2 {
  margin-bottom: 20px;
  color: var(--primary);
}

.auth-switch {
  margin-top: 20px;
}

.auth-switch a {
  color: var(--primary);
  font-weight: bold;
}

.btn.full {
  width: 100%;
  text-align: center;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: white;
  padding: 12px 30px;
  border-radius: 50px;
  display: inline-block;
  margin-top: 10px;
  border: none;
  cursor: pointer;
  transition: background 0.3s ease;
}

.btn.full:hover {
  background: linear-gradient(90deg, #e64a00, #ff8c32);
}