HTML:
<footer id="footer">
  <div class="container">

    <!-- Contact Details -->
    <div class="footer-section contact-details">
      <h3>Contact</h3>
      <p>Email: <a href="mailto:[email protected]" >[email protected]</a></p>
      <p>Phone: 0912 345 6789</p>
    </div>

    <!-- Social Media -->
    <div class="footer-section social-media">
      <h3>Follow Us</h3>
      <div class="social-icons">
        <a href="https://www.facebook.com/sample" target="_blank" class="rimart-link">
          <i class="fab fa-facebook"></i><span>Facebook</span>
        </a>
        <a href="https://www.instagram.com/sample" target="_blank"><i class="fab fa-instagram"></i>Instagram</a>
        <a href="https://www.linkedin.com/in/sample" target="_blank"><i class="fab fa-linkedin"></i>linkedin</a>
      </div>
    </div>

    <!-- Newsletter -->
    <div class="footer-section newsletter">
      <h3>Newsletter</h3>
      <form>
        <input type="email" placeholder="Enter your email" required>
        <button type="submit">Subscribe</button>
      </form>
    </div>

  </div>
</footer>






CSS:
#footer {
    background: var(--dark-color);
    color: var(--white-color);
    padding: 25px 0 15px;
    position: sticky;
    bottom: 0;
    z-index: 1000;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
  }

  #footer .container {
    max-width: var(--site-max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    background: transparent;
    box-shadow: none;
  }

  .footer-section {
    flex: 1;
    padding: 0 15px;
  }

  .footer-section h3 {
    margin-bottom: 15px;
    color: var(--tertiary-color);
    font-size: 1.2rem;

  }

  .footer-section p,
  .footer-section a {
    color: var(--white-color);
    font-size: 14px;
    margin-bottom: 8px;
    display: block;
  }

  .footer-section a:hover {
    color: var(--tertiary-color);
  }

  .social-icons a {
    display: inline-flex;
    align-items: center;
    margin-right: 15px;
    transition: transform 0.3s ease;
  }

  .social-icons a:hover {
    transform: translateY(-2px);
  }

  .social-icons i {
    margin-right: 5px;
    font-size: 18px;
  }

  .newsletter form {
    display: flex;
    margin-top: 10px;
  }

  .newsletter input {
    padding: 10px;
    border: none;
    border-radius: 4px 0 0 4px;
    width: 200px;
    font-size: 14px;
  }

  .newsletter button {
    padding: 10px 15px;
    background: var(--tertiary-color);
    color: var(--dark-color);
    border-radius: 0 4px 4px 0;
    font-weight: var(--font-weight-medium);
    transition: background 0.3s ease;
  }

  .newsletter button:hover {
    background: #ffd700;
  }

  /* Copyright */
  .copyright {
    text-align: center;
    padding: 15px 0 0;
    margin-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 12px;
    color: var(--medium-gray-color);
  }