header {
      background-color: #006d77;
      color: white;
      padding: 15px 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    header a {
      color: white;
      text-decoration: none;
      font-weight: bold;
    }
.container { max-width: 400px; margin: 5rem auto; background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 0 20px rgba(0,0,0,0.05); }
h1 { text-align: center; color: #0077cc; }
form { display: flex; flex-direction: column; }
label { margin-top: 1rem; font-weight: bold; }
input[type="email"],
input[type="password"] {
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 1rem;
}
button {
  margin-top: 2rem;
  background: #0077cc;
  color: white;
  padding: 0.8rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}
.register-link {
  text-align: center;
  margin-top: 1rem;
}
.register-link a {
  color: #0077cc;
  text-decoration: none;
  font-weight: bold;
}