* {
    margin: 0;
    padding: 0;
    color:white;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
}
header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding:20px;
  padding-top: 40px;
  font-weight: 400;
  position: relative;
  z-index: 20; /* sit above overlays */
}
.nav-toggle {
  /* hide visually but keep accessible */
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  border: 0 !important;
  clip: rect(0 0 0 0) !important;
  overflow: hidden !important;
}
nav {
  position: relative;
  display: flex;
  justify-content: center;
  z-index: 30; /* ensure links are clickable above overlays */
}

nav a {
    padding:0px 20px;
    text-decoration: none;
    font-size: 1rem;
}
nav a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.main button {
    position: absolute;
    right:0;
    
    padding:8px 25px;
    font-size: 14px;
    font-weight: 500;
}
.blue
{
    display: inline-block;
    width: 150px;
    background-color: rgba(0, 217, 255, 0.753);
    border:1px solid rgba(0, 217, 255, 0.753);
    border-radius: 10px;
    padding: 1.5vh 2vh;
    font-size: 1rem;
    font-weight: 600;
    margin: 6vh 0vh;
}
.blue:hover{
    background-color:rgba(0, 217, 255, 0);
    transition: 1.5s ease-in-out;
}

footer {
    background-color: rgba(100, 99, 99, 0.963);
    text-align: center;
    margin: 0 auto;
    padding: 10px 0;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  cursor: pointer;
  position: relative;
  z-index: 40; /* ensure hamburger is on top */
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background-color: #fff;
  height: 3px;
  width: 25px;
  border-radius: 3px;
  position: relative;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-label span::before {
  top: -8px;
}

.nav-toggle-label span::after {
  top: 8px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }
  header {
    justify-content: flex-start;
  }
  nav {
    position: absolute;
    top: 60px;
    left: 0;
    background-color: #93999e82;
    width: 100%;
    flex-direction: column;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease-in-out;
    z-index: 10;
  }

  nav a {
    text-align: center;
    padding: 10px 0;
  }

  /* Show menu when checked */
  .nav-toggle:checked + .nav-toggle-label + nav {
    max-height: 500px; /* enough to show all links */
  }
  .nav-toggle-label{
    overflow:visible !important;
  }
  .main button {
    position: absolute;
    right: 0;
    top:20px;
    margin: 10px !important;
    padding:8px 25px;
    font-size: 14px;
    font-weight: 500;
}
}