*, *::after, *::before {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  display: flex;
  overflow-x: hidden;
  color: black;
}

html, body {
  height: 100%;
}

:root {
  --bar-width: 60px;
  --bar-height: 8px;
  --hamburger-gap: 6px;
  --foreground: #333;
  --background: white;
  --hamburger-margin: 8px;
  --animation-timing: 200ms ease-in-out;
  --hamburger-height: calc(var(--bar-height) * 3 + var(--hamburger-gap) * 2);
  --link-color: #fff;
  --link-hover-color: #ccc;
  --link-background: #444;
  --link-hover-background: #666;
  --sidebar-width: 250px;
}

.hamburger-menu {
  --x-width: calc(var(--hamburger-height) * 1.41421356237);

  display: flex;
  flex-direction: column;
  gap: var(--hamburger-gap);
  width: max-content;
  position: absolute;
  top: var(--hamburger-margin);
  left: var(--hamburger-margin);
  z-index: 2;
  cursor: pointer;
}

.hamburger-menu:has(input:checked) {
  --foreground: white;
  --background: #333;
}

.hamburger-menu:has(input:focus-visible)::before,
.hamburger-menu:has(input:focus-visible)::after,
.hamburger-menu input:focus-visible {
  border: 1px solid var(--background);
  box-shadow: 0 0 0 1px var(--foreground);
}

.hamburger-menu::before,
.hamburger-menu::after,
.hamburger-menu input {
  content: "";
  width: var(--bar-width);
  height: var(--bar-height);
  background-color: var(--foreground);
  border-radius: 9999px;
  transform-origin: left center;
  transition: opacity var(--animation-timing), width var(--animation-timing),
    rotate var(--animation-timing), translate var(--animation-timing),
    background-color var(--animation-timing);
}

.hamburger-menu input {
  appearance: none;
  padding: 0;
  margin: 0;
  outline: none;
  pointer-events: none;
}

.hamburger-menu:has(input:checked)::before {
  rotate: 45deg;
  width: var(--x-width);
  translate: 0 calc(var(--bar-height) / -2);
}

.hamburger-menu:has(input:checked)::after {
  rotate: -45deg;
  width: var(--x-width);
  translate: 0 calc(var(--bar-height) / 2);
}

.hamburger-menu input:checked {
  opacity: 0;
  width: 0;
}

.sidebar {
  transition: transform var(--animation-timing);
  transform: translateX(-100%);
  padding: 0.5rem 1rem;
  padding-top: calc(var(--hamburger-height) + var(--hamburger-margin) + 1rem);
  background-color: var(--foreground);
  color: var(--background);
  width: var(--sidebar-width);
  min-height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
}

.hamburger-menu:has(input:checked) + .sidebar {
  transform: translateX(0);
}

.sidebar nav a {
  display: block;
  color: var(--link-color);
  background-color: var(--link-background);
  padding: 0.75rem 1rem;
  margin: 0.5rem 0;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color var(--animation-timing), color var(--animation-timing);
}

.sidebar nav a:hover {
  background-color: var(--link-hover-background);
  color: var(--link-hover-color);
}

.content {
  flex-grow: 1;
  margin-left: calc(var(--hamburger-margin) + var(--hamburger-height));
  padding: 2rem;
  transition: margin-left var(--animation-timing);
}

#menu-toggle:checked ~ .content {
  margin-left: calc(var(--sidebar-width) + var(--hamburger-margin) + var(--hamburger-height));
}

main {
  margin-left: calc(var(--hamburger-height) + var(--hamburger-margin) + 1rem);
}

.slideshow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.slide {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.fade {
  animation: fadeEffect 15s infinite;
}

@keyframes fadeEffect {
  0% { opacity: 1; }
  33% { opacity: 1; }
  66% { opacity: 0; }
  100% { opacity: 0; }
}

.slideshow .slide:nth-child(1) {
  animation-delay: 0s;
}

.slideshow .slide:nth-child(2) {
  animation-delay: 5s;
}

.slideshow .slide:nth-child(3) {
  animation-delay: 10s;
}

.welcome-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100vw;
  position: absolute;
  top: 0;
  left: 0;
  color: white;
}
@media only screen and (max-width: 768px) {
  .hamburger-menu {
      top: 10px;
      left: 10px;
  }

  .sidebar {
      width: 200px;
      min-height: calc(100vh - 40px);
      padding-top: 1rem;
  }

  .content {
      padding: 1rem;
  }

  main {
      margin-left: 10px;
  }

  .content main {
      margin-bottom: 50px;
  }

  .welcome-screen {
      height: auto;
  }
}


.slideshow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.slide {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.fade {
  animation: fadeEffect 15s infinite;
}

@keyframes fadeEffect {
  0% { opacity: 1; }
  33% { opacity: 1; }
  66% { opacity: 0; }
  100% { opacity: 0; }
}

.slideshow .slide:nth-child(1) {
  animation-delay: 0s;
}

.slideshow .slide:nth-child(2) {
  animation-delay: 5s;
}

.slideshow .slide:nth-child(3) {
  animation-delay: 10s;
}

.welcome-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100vw;
  position: absolute;
  top: 0;
  left: 0;
  color: white;
}