/* =========================
   HAMBURGER MENU SYSTEM
========================= */

/* Base nav styling */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;

  background-color: #ffffff;

  padding: 10px 20px;

  position: fixed;
  top: 0;

  width: 100%;

  box-sizing: border-box;
  z-index: 10;
}

.nav-brand {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1101;
}

.spinning-logo-container {
  display: inline-block;
  margin-right: 15px;
  position: relative;
  top: 2px;
}

.spinning-logo {
  width: 24px;
  height: 24px;
  animation: spin 3s linear infinite;
  object-fit: contain;
}

/* Logo */
.logo {
  font-size: 20px;
  color: rgb(0, 0, 0);
  font-family: Helvetica, sans-serif;
  text-decoration: none;
  z-index: 1101;
}

.logo:hover {
  color: rgb(0, 0, 0);
}

/* Desktop nav */
nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 20px;
}

nav ul li a {
  color: black;
  font-family: Helvetica, sans-serif;
  font-size: 12px;
  opacity: 1;
  text-decoration: none;
}

nav ul li a:hover {
  text-shadow: 0 0 4px #fff, 0 0 8px #fff;
}

.portfolio-nav-item {
  position: relative;
}

.portfolio-parent-link {
  color: black;
}

.portfolio-subnav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
  left: 0;
  margin: 0;
  opacity: 0;
  padding: 7px 0 0;
  pointer-events: none;
  position: absolute;
  top: 100%;
  transition: opacity 0.2s ease;
}

.portfolio-subnav li {
  margin-left: 0;
}

.portfolio-subnav li a {
  color: black;
}

.portfolio-nav-item:hover .portfolio-parent-link,
.portfolio-nav-item:focus-within .portfolio-parent-link {
  color: #cccccc;
}

.portfolio-nav-item:hover .portfolio-subnav,
.portfolio-nav-item:focus-within .portfolio-subnav {
  opacity: 1;
  pointer-events: auto;
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  margin-left: auto;
  position: relative;
  z-index: 1100;
}

.hamburger .line {
  width: 20px;
  height: 2px;
  background-color: rgb(0, 0, 0);
  margin: 5px 0;
  transition: transform 0.3s ease;
  position: relative;
}

/* =========================
   MOBILE
========================= */

@media (max-width: 600px) {

  .hamburger {
    display: flex;
  }

  nav ul {
    display: flex;

    flex-direction: column;

    position: fixed;

    align-items: flex-end;
    text-align: right;

    top: 0;
    left: 0;

    width: 100vw;
    height: 100vh;

    background-color: rgb(255, 255, 255);

    padding-top: 100px;
    padding-right: 20px;

    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    z-index: 1000;
  }

  .nav-links li {
    margin-bottom: 5px;
  }

  .nav-links li a {
    font-size: 18px;
  }

  .nav-links .portfolio-nav-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
  }

  .nav-links .portfolio-nav-item:hover .portfolio-parent-link,
  .nav-links .portfolio-nav-item:focus-within .portfolio-parent-link {
    color: black;
  }

  .nav-links .portfolio-subnav li a,
  .nav-links .portfolio-nav-item:hover .portfolio-subnav li a,
  .nav-links .portfolio-nav-item:focus-within .portfolio-subnav li a {
    color: #cccccc;
  }

  .nav-links .portfolio-subnav {
    align-items: flex-end;
    background-color: transparent;
    height: auto;
    margin-top: 5px;
    opacity: 1;
    padding: 0;
    pointer-events: auto;
    position: static;
    transition: none;
    width: auto;
  }

  .nav-links .portfolio-subnav li {
    margin-bottom: 0;
  }

  #menu-toggle:checked ~ .nav-links {
    opacity: 1;
    pointer-events: auto;
  }

  /* OPEN ANIMATION */

  #menu-toggle:checked + .hamburger .line:nth-child(1) {
    animation: drop-rotate-down 0.5s forwards;
  }

  #menu-toggle:checked + .hamburger .line:nth-child(2) {
    animation: drop-rotate-up 0.5s forwards;
  }

  /* CLOSE ANIMATION */

  #menu-toggle:not(:checked) + .hamburger .line:nth-child(1) {
    animation: drop-rotate-down-reverse 0.5s forwards;
  }

  #menu-toggle:not(:checked) + .hamburger .line:nth-child(2) {
    animation: drop-rotate-up-reverse 0.5s forwards;
  }
}

/* =========================
   KEYFRAMES
========================= */

@keyframes drop-rotate-down {

  0% {
    transform: translateY(0) rotate(0);
  }

  50% {
    transform: translateY(6px) rotate(0);
  }

  100% {
    transform: translateY(6px) rotate(45deg);
  }
}

@keyframes drop-rotate-up {

  0% {
    transform: translateY(0) rotate(0);
  }

  50% {
    transform: translateY(-6px) rotate(0);
  }

  100% {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@keyframes drop-rotate-down-reverse {

  0% {
    transform: translateY(6px) rotate(45deg);
  }

  50% {
    transform: translateY(6px) rotate(0);
  }

  100% {
    transform: translateY(0) rotate(0);
  }
}

@keyframes drop-rotate-up-reverse {

  0% {
    transform: translateY(-6px) rotate(-45deg);
  }

  50% {
    transform: translateY(-6px) rotate(0);
  }

  100% {
    transform: translateY(0) rotate(0);
  }
}

@keyframes spin {

  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}