/* =========================
   Navigation Start
========================= */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(51, 51, 51, 0.5);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  color: white;
  padding: 10px 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  flex-wrap: wrap;
}

/* =========================
   Hamburger
========================= */

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-right: 20px;
  z-index: 150;
}

.hamburger .bar,
.hamburger::before,
.hamburger::after {
  content: '';
  display: block;
  width: 30px;
  height: 4px;
  background-color: white;
  margin: 6px 0;
  transition: 0.4s ease;
  border-radius: 2px;
}

.hamburger.is-active::before {
  transform: rotate(-45deg) translate(-8px, 6px);
}

.hamburger.is-active::after {
  transform: rotate(45deg) translate(-8px, -6px);
}

.hamburger.is-active .bar {
  opacity: 0;
}

.header-left {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-width: 0;
}

/* =========================
   Top-level nav layout
========================= */

.primary-nav > ul,
.secondary-nav > ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

nav ul li {
  position: relative;
  margin-right: 20px;
}

/* Timeline navigation spacing */
.primary-nav ul li {
  margin-right: 28px;
}

/* Resource navigation spacing */
.secondary-nav ul li {
  margin-right: 16px;
}

/* Top nav row */
.primary-nav {
  margin-bottom: 8px;
}

/* Lower resource row */
.secondary-nav {
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.429);
}

/* =========================
   Nav link styles
========================= */

.primary-nav a,
.secondary-nav a,
.dropbtn {
  font-family: "Amatic SC", cursive, sans-serif;
  font-weight: 700;
  color: white;
  text-decoration: none;
  cursor: pointer;
  background: none;
  border: none;
  white-space: nowrap;
}

/* Timeline nav */
.primary-nav a,
.primary-nav .dropbtn {
  font-size: 21px;
  letter-spacing: 0.5px;
}

/* Resource nav */
.secondary-nav a {
  font-size: 19px;
  letter-spacing: 0.2px;
  opacity: 0.9;
}

.primary-nav a:hover,
.secondary-nav a:hover,
.dropbtn:hover,
.dropbtn:focus {
  color: red;
  outline: none;
}

.dropdown.open .dropbtn {
  color: red;
}

/* =========================
   Desktop dropdown
========================= */

.dropdown-content {
  position: absolute;
  top: 100%;
  left: 5px;
  display: block;

  list-style: none;
  margin: 0;
  padding: 0;

  background-color: #444;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 6px 14px rgba(0,0,0,0.35);

  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);

  transition:
    opacity 0.4s ease-out,
    transform 0.4s ease-out,
    visibility 0s linear 0.4s;

  width: fit-content;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.dropdown:hover .dropdown-content,
.dropdown.open .dropdown-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-content li {
  display: block;
}

.dropdown-content a {
  display: block;
  width: 100%;
  padding: 6px 8px 6px 8px;
  box-sizing: border-box;
  font-size: 17px;
  color: white;
  text-decoration: none;
  transition: color 0.2s ease;
}

.dropdown-content a:hover {
  color: red;
}

.nav-group-label {
  display: none;
}

/* =========================
   Mobile / Tablet
========================= */

@media (max-width: 1023px) {

  .site-header {
    background-color: rgba(51, 51, 51, 0.4);
    backdrop-filter: blur(2px);
  }

  /* Hamburger */

  .hamburger {
    position: absolute;
    display: block;
    left: 15px;
  }

  /* Slide-out panel */

  .nav-panel {
    position: fixed;
    top: 70px;
    left: 0;
    background-color: rgba(51, 51, 51, 0.95);
    backdrop-filter: blur(2px);
    border-radius: 0 8px 8px 0;
    padding: 10px 15px 10px 15px;
    max-width: 55vw;

    max-height: calc(100vh - 70px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  
    z-index: 99;

    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);

    transition: opacity 1s ease, transform 1s ease, visibility 0s linear 1s;
  }

  body.nav-open .nav-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
    transition: opacity 1s ease, transform 1s ease, visibility 0s linear 0s;
  }

  /* Vertical nav layout */

  .primary-nav > ul,
  .secondary-nav > ul {
    flex-direction: column;
    align-items: flex-start;
    margin: 0;
    padding: 4px;
  }

  .primary-nav > ul {
    gap: 8px;
  }

  .secondary-nav > ul {
    gap: 5px;
  }

  .primary-nav > ul > li,
  .secondary-nav > ul > li {
    width: 100%;
    margin-right: 0;
  }

  /* Mobile nav font sizes */

  .primary-nav a,
  .primary-nav .dropbtn {
    font-size: 19px;
    letter-spacing: 0.4px;
  }

  .secondary-nav a {
    font-size: 18px;
    letter-spacing: 0.15px;
  }

  /* Dropdown button reset */

  .dropdown {
    width: 100%;
  }

  .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
    background: transparent;
    border: 0;
    padding: 0;
    margin: 0;

    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
  }

  /* Mobile dropdown */

  .dropdown-content {
    position: relative;
    top: 0;
    left: 0;

    display: block;
    width: 100%;
    margin: 0;
    padding: 0;

    list-style: none;

    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transform: translateY(-6px);

    background-color: transparent;
    box-shadow: none;

    pointer-events: none;

    transition:
      max-height 0.42s ease-out,
      opacity 0.36s ease-out,
      transform 0.36s ease-out,
      visibility 0s linear 0.36s;
  }

  .dropdown.open .dropdown-content {
    max-height: 500px;
    margin-top: 4px;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);

    background-color: #555;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);

    pointer-events: auto;

    transition:
      max-height 0.42s ease-out,
      opacity 0.36s ease-out,
      transform 0.36s ease-out,
      visibility 0s linear 0s;
  }

  .dropdown-content a {
    font-size: 15px;
    padding: 6px 10px;
  }

  .nav-group-label {
    display: block;
    font-family: Arial, sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    margin: 3px 3px 3px;
  }

  /* .nav-group-label:first-of-type {
    margin-top: 8px;
  } */
}

/* =========================
   Desktop reset
========================= */

@media (min-width: 1024px) {

  .nav-panel {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    transition: none !important;
    position: static;
    background: none;
    padding: 0;
  }

}

/* =========================
   End Navigation
========================= */