:root {
  --primary-color: #1a2980;
  --secondary-color: #26d0ce;
  --background-color: #f4f4f4;
  --white: #ffffff;
  --error-color: #ff4444;
  --body__bg--1: #1a2a40;
  --body__bg--2: #26a0a6;
  --navbar__bg--3: rgba(26, 41, 128, 0.8);
  --navbar__bg--4: rgba(38, 208, 206, 0.8);
  --signup__box__shadow--5: rgba(0, 0, 0, 0.1);
  --form__border--6: #ddd;
  --google__bg--7: #db4437;
  --google__txt--8: white;
  --github__bg--9: #333;
  --footer__bg--10: #1a2980;
  --footer__bg--11: #26d0ce;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Arial", sans-serif;
  background-color: var(--background-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  line-height: 1.6;
  padding: 20px;
  background: linear-gradient(135deg, var(--body__bg--1), var(--body__bg--2));
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(
    to right,
    var(--navbar__bg--3),
    var(--navbar__bg--4)
  );
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  z-index: 1000;
}

.navbar .brand {
  color: var(--white);
  font-size: 24px;
  font-weight: bold;
}

.navbar-links a {
  color: var(--white);
  text-decoration: none;
  margin-left: 15px;
  transition: color 0.3s ease;
}

.navbar-links a:hover {
  color: var(--secondary-color);
}

.signup-container {
  background-color: var(--white);
  border-radius: 10px;
  box-shadow: 0 4px 6px var(--signup__box__shadow--5);
  width: 100%;
  max-width: 450px;
  padding: 30px;
  margin-top: 80px;
}

.signup-container h2 {
  text-align: center;
  color: var(--primary-color);
  margin-bottom: 25px;
}

.form-group {
  margin-bottom: 15px;
  position: relative;
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--form__border--6);
  border-radius: 6px;
  transition: border-color 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group .error-message {
  color: var(--error-color);
  font-size: 0.8em;
  position: absolute;
  bottom: -20px;
  left: 0;
  display: none;
}

.form-group.error input {
  border-color: var(--error-color);
}

.form-group.error .error-message {
  display: block;
}

.signup-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.signup-btn:hover {
  background-color: var(--secondary-color);
}

.social-login {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}

.social-btn {
  width: 48%;
  padding: 10px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.google-btn {
  background-color: var(--google__bg--7);
  color: var(--google__txt--8);
}

.github-btn {
  background-color: var(--github__bg--9);
  color: var(--google__txt--8);
}

.login-link {
  text-align: center;
  margin-top: 20px;
}

.login-link a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(
    to right,
    var(--footer__bg--10),
    var(--footer__bg--11)
  );
  color: var(--white);
  text-align: center;
  padding: 10px 0;
}

@media (max-width: 600px) {
  .signup-container {
    width: 100%;
    padding: 20px;
  }

  .social-login {
    flex-direction: column;
  }

  .social-btn {
    width: 100%;
    margin-bottom: 10px;
  }
}