body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #0f172a, #1e3a8a);
  color: #fff;
  min-height: 100vh;
  overflow-x: hidden;
}

.auth-container {
  background: #fff;
  color: #000;
  border-radius: 20px;
  overflow: hidden;
  max-width: 960px;
  margin: 4rem auto;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.auth-left {
  background: url('https://images.unsplash.com/photo-1605296867304-46d5465a13f1?auto=format&fit=crop&w=800&q=80') no-repeat center center;
  background-size: cover;
  color: #fff;
  padding: 3rem 2rem;
}

.auth-left h2 {
  font-weight: 700;
}

.auth-tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.auth-tabs label {
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-bottom: 3px solid transparent;
}

input[type="radio"] {
  display: none;
}

input#tab-login:checked ~ .tab-login,
input#tab-signup:checked ~ .tab-signup,
input#tab-forgot:checked ~ .tab-forgot {
  display: block;
}

.auth-tabs label:hover,
input#tab-login:checked ~ .tabs label[for="tab-login"],
input#tab-signup:checked ~ .tabs label[for="tab-signup"],
input#tab-forgot:checked ~ .tabs label[for="tab-forgot"] {
  border-bottom: 3px solid #fd0d0d;
}

.tab-content {
  display: none;
  padding-top: 1rem;
}

.form-control, .btn {
  border-radius: 10px;
}

@media (max-width: 768px) {
  .auth-left {
    display: none;
  }
}
.go-back-btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 30px;
  background: linear-gradient(to right, #8a1e1e, #eb2525);
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.go-back-btn:hover {
  background: linear-gradient(to right, #eb2525, #af1e1e);
  transform: translateY(-2px);
  text-decoration: none;
}