body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(120deg, #213448, #2c587d);
  padding: 0;
}

.nav-container {
  background-color: #fff;
  padding: 15px 0;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.nav-links a {
  margin: 0 12px;
  color: #213448;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #2c587d;
  text-decoration: underline;
}

.signup-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 15px;
}

.signup-card {
  background: #fff;
  padding: 40px 30px;
  max-width: 900px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.signup-card h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #213448;
}

form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 30px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 500;
  margin-bottom: 6px;
  color: #333;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea {
  padding: 12px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
}

textarea {
  resize: vertical;
}

.form-group.full {
  grid-column: span 2;
}

button {
  grid-column: span 2;
  padding: 12px;
  background: #213448;
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #2a4d6b;
}

.login-link {
  grid-column: span 2;
  text-align: center;
  font-size: 14px;
  margin-top: 10px;
}

.login-link a {
  color: #213448;
  font-weight: 500;
  text-decoration: none;
}

.login-link a:hover {
  text-decoration: underline;
}

@media screen and (max-width: 768px) {
  form {
    grid-template-columns: 1fr;
  }

  .form-group.full,
  button,
  .login-link {
    grid-column: span 1;
  }
}