body {
  margin: 0;
  background-color: #111;
  color: white;
  font-family: Arial, sans-serif;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 50px;
  flex-wrap: wrap;
}

.logo img {
  height: 150px;
  max-width: 100%;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
  padding: 0;
  margin: 0;
}

nav ul li a {
  text-decoration: none;
  color: #00aaff;
  font-weight: bold;
}

.auth-buttons {
  display: flex;
  gap: 10px;
}

.register-btn, .login-btn {
  border: 1px solid #00aaff;
  padding: 5px 15px;
  color: #00aaff;
  border-radius: 5px;
  text-decoration: none;
  font-size: 14px;
}

main {
  max-width: 400px;
  margin: 80px auto;
  padding: 0 20px;
  text-align: center;
}

h1 {
  font-size: 20px;
  margin-bottom: 30px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  text-align: left;
}

label {
  font-size: 14px;
  color: #00aaff;
}

input {
  background-color: #111;
  border: 1px solid #444;
  padding: 10px;
  color: white;
  outline: none;
  border-radius: 5px;
}

button {
  background: linear-gradient(to right, #a100ff, #0077ff);
  border: none;
  padding: 10px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  border-radius: 5px;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: center;
    padding: 15px 20px;
  }

  nav ul {
    flex-direction: column;
    gap: 15px;
    align-items: center;
  }

  .auth-buttons {
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
  }

  main {
    margin: 40px auto;
    padding: 0 15px;
  }

  h1 {
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  nav ul {
    gap: 10px;
  }

  .register-btn, .login-btn {
    font-size: 14px;
    padding: 6px 15px;
  }

  input, button {
    font-size: 14px;
    padding: 8px;
  }

  h1 {
    font-size: 16px;
  }
}