:root {
  --background: rgba(85, 214, 170, 0.85);
}

*,
*::after,
*:before {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  list-style: none;
}

body {
  background-color: #222;
  font-family: sans-serif;
  font-weight: 400;
}

.content {
  height: 200vh;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0)),
    url("./bg.jpg") no-repeat center / cover;
  background-blend-mode: multiply;
  display: grid;
  place-items: center;
}

/* navigation styles start here */

header {
  background: var(--background);
  text-align: center;
  position: fixed;
  width: 100%;
  z-index: 999;
  padding: 1em 0;
}

#nav-toggle {
  display: none;
}

.nav-toggle-label {
  position: absolute;
  top: 0;
  left: 0;
  margin-left: 1em;
  height: 100%;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background-color: #fff;
  height: 2px;
  width: 2em;
  border-radius: 2px;
  position: relative;
}

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

.nav-toggle-label span::before {
  bottom: 10px;
}

.nav-toggle-label span::after {
  top: 10px;
}

nav {
  position: absolute;
  text-align: left;
  top: 100%;
  left: 0;
  background-color: var(--background);
  width: 100%;
  transform: scale(1, 0);
  transform-origin: top;
  transition: transform 0.5s ease-in-out;
}

nav li {
  padding-bottom: 1em;
  padding-left: 1em;
}

nav a {
  text-decoration: none;
  color: #fff;
  font-size: 1.2rem;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 150ms ease-in-out;
  display: block;
  height: 100%;
}

nav ul {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

nav li:hover {
  background-color: rgba(0, 214, 170, 0.85);
}

nav li:hover a {
  color: #000;
}

#nav-toggle:checked ~ nav {
  display: block;
  transform: scale(1, 1);
}

#nav-toggle:checked ~ nav a {
  opacity: 1;
  transition: opacity 250ms ease-in-out 250ms;
}