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

body {
  font-family: "Lato Open Sans", Helvetica, Arial, sans-serif;
  padding-top: 35px; /* match fixed header height */
  font-weight: 100;
  line-height: 1.5;
  background-color: #fff;
  color: #000; /* FIX: readable text */
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: #ddd;
  padding: 6px 40px;
  z-index: 1000;
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 13px;
}

.navbar li a {
  text-decoration: none;
  color: #000;
  font-weight: 200;
  font-size: 13px;
  transition: color 0.3s;
}

.navbar li a:hover {
  color: #ccc;
}

.navbar a.active {
  color: #000;
  font-weight: bold;
}

/* Hero */
.hero {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-bottom: 40px; /* FIX: space before footer */
}



/* Hero image */
.air::before {
  content: "";
  display: block;
  width: 100%;
  padding-top: calc(1120 / 1920 * 100%);
  background-image: url("images/Air_About_1920px.jpg");
  background-size: 100% auto;
  background-repeat: no-repeat;
  background-position: top center;
}

/* Hero content */
.air-content {
  position: absolute;
  top: 50%;
  left: 60%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.58);
  padding: 20px 25px;   /* inner spacing */
  padding: 10px;
  border-radius: 10px;
  color: #fff;
}

.air-content h1 {
  font-weight: 200;
  font-size: 15px;
  margin-bottom: 20px;
}

/* Button */
.air-button {
  display: inline-block;
  padding: 5px;
  background-color: transparent; /* FIX */
  color: #fff;
  font-weight: 300; /* FIX */
  text-decoration: none;
  border-radius: 2px;
  transition: background-color 0.3s ease;
}

.air-button:hover {
  background-color: #000;
}

/* Mobile */
@media (max-width: 768px) {
  .center-logo {
    display: block;
    z-index: 10;
  }

  .air-content {
    position: static;
    transform: none;
    background-color: transparent;
    padding: 30px;
    color: #000;
    margin-top: 10px;
    margin-bottom: 10px;
  }

  .air-content h1 {
    color: #000;
  }

  .air-button {
    padding: 8px 14px;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 4px;
  }

  .air-button:hover {
    background-color: #666;
  }
}

/* Footer */
.site-footer {
  background-color: #fff;
  color: #333;
  text-align: center;
  padding: 20px 10px;
  font-size: 11px;
  line-height: 1.5;
  border-top: 1px solid #eee;
}