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

/* base styles */
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #fafafa;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* header & nav */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
}

.nav-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
}

.nav-list {
  list-style: none;
  display: flex;
  justify-content: center;
}

.nav-list li {
  margin: 0 15px;
}

.nav-link {
  text-decoration: none;
  color: #555;
  font-size: 16px;
  padding: 8px 10px;
  transition: color 0.3s, border-bottom 0.3s;
  border-bottom: 3px solid transparent;
}

.nav-link:hover,
.nav-link.active {
  color: #222;
  border-bottom: 3px solid #4a90e2; /* accent color */
}

/* main content */
.content {
  flex-grow: 1;
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 20px;
}

/* footer */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid #e0e0e0;
  text-align: center;
  padding: 20px 0;
  color: #777;
  font-size: 14px;
}

/* dropdown */
.nav-list li.dropdown {
  position: relative;
}

.nav-list li .dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #ffffff;
  border: 1px solid #e0e0e0;
  list-style: none;
  min-width: 160px;
  z-index: 1000;
}

.nav-list li .dropdown-menu li {
  margin: 0;
}

.nav-list li .dropdown-menu li a {
  display: block;
  padding: 10px 15px;
  font-size: 14px;
  color: #555;
  text-decoration: none;
  border-bottom: 1px solid #eee;
}

.nav-list li .dropdown-menu li a:hover {
  background-color: #f0f0f0;
  color: #222;
}

/* show dropdown on hover */
.nav-list li.dropdown:hover .dropdown-menu {
  display: block;
}