/* ========== Page Style ========== */
body {
  font: 18px 'DM Serif Text', serif;
  color: #fff;
  background: #123159;
  width: 1200px;
  margin: 0 auto;
  padding: 0;
  line-height: 1.6;
}

/* ========== Header & Logo ========== */
#header {
  display: flex;
  align-items: center;
  padding: 20px 0;
}

#logo {
  width: 120px;
  height: auto;
  display: block;
}

/* ========== Hero Banner ========== */
#top-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ========== Navigation ========== */
#navbar {
  background: #163A59;
  padding: 10px 0;
  text-align: center;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list li {
  display: inline-block;
  margin: 0 20px;
}

.nav-list a {
  font: 18px 'DM Serif Text', serif;
  color: #fff;
  text-decoration: none;
  padding: 6px 12px;
}

.nav-list a:hover {
  background: #2477BF;
  border-radius: 4px;
}

/* ========== Main Web Page Content ========== */
main {
  padding: 20px;
  margin-bottom: 40px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* Main Heading */
.centered-content {
  text-align: center;
  margin-bottom: 50px;
}

.main-heading {
  font: bold 24px 'DM Serif Text', serif;
  color: #fff;
  margin-bottom: 24px;
}

.centered-content p {
  margin: 20px 0;
  font: 18px 'DM Serif Text', serif;
}

/* Sub Heading */
.sub-heading {
  font: bold 22px 'DM Serif Text', serif;
  margin: 40px 0 20px;
  text-align: center;
  color: #fff;
}

/* Email Quick Links */
.sub-nav {
  list-style: none;
  padding: 0;
  margin-bottom: 40px;
  text-align: center;
}

.sub-nav li {
  display: inline-block;
  margin: 0 15px;
}

.sub-nav a {
  color: #2477BF;
  font-weight: bold;
  text-decoration: none;
  font-size: 18px;
}

.sub-nav a:hover {
  text-decoration: underline;
}

/* Product Columns */
.product-columns {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.product {
  width: 30%;
  background: #163A59;
  padding: 20px;
  text-align: center;
  color: #fff;
  border-radius: 8px;
}

.product p {
  font: 18px 'DM Serif Text', serif;
  margin-bottom: 12px;
}

.product img {
  width: 100%;
  height: auto;
  margin: 12px 0;
  border-radius: 4px;
  cursor: pointer;
}

/* Email Button Link */
.quick-link {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 14px;
  background: #2477BF;
  color: #fff;
  font: bold 16px 'DM Serif Text', serif;
  text-decoration: none;
  border-radius: 4px;
}

.quick-link:hover {
  background: #1c5fa2;
}

/* ========== Footer ========== */
footer {
  background: #163A59;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  font: 16px 'DM Serif Text', serif;
}

/* ========== Responsive Design ========== */

/* Viewport width fluid */
body {
  max-width: 100%;
  width: auto;
  padding-left: 10px;
  padding-right: 10px;
}

/* Media Query for tablets and small desktops (768px and below) */
@media screen and (max-width: 768px) {
  body {
    font-size: 16px;
  }

  #navbar {
    padding: 8px 0;
  }

  .nav-list li {
    margin: 0 12px;
  }

  .nav-list a {
    font-size: 16px;
    padding: 5px 10px;
  }

  main {
    padding: 15px;
  }

  .product-columns {
    flex-direction: column;
    gap: 30px;
  }

  .product {
    width: 100%;
  }

  .main-heading {
    font-size: 22px;
  }

  .sub-heading {
    font-size: 20px;
    margin: 30px 0 15px;
  }
}

/* Media Query for mobile phones (480px and below) */
@media screen and (max-width: 480px) {
  body {
    font-size: 14px;
    padding-left: 8px;
    padding-right: 8px;
  }

  #logo {
    width: 90px;
  }

  #navbar {
    padding: 6px 0;
  }

  .nav-list li {
    display: block;
    margin: 8px 0;
  }

  .nav-list a {
    font-size: 14px;
    padding: 8px 12px;
    display: block;
  }

  .product-columns {
    flex-direction: column;
    gap: 20px;
  }

  .product {
    width: 100%;
    padding: 15px;
  }

  .main-heading {
    font-size: 20px;
  }

  .sub-heading {
    font-size: 18px;
    margin: 20px 0 10px;
  }

  .quick-link {
    font-size: 14px;
    padding: 8px 12px;
  }
}