* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

a {
  color: unset;
}

.index-title {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 20px;
  margin-left: 5px;
  color: black;
}

.hero-content {
  display: flex;
  flex-direction: row;
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  max-height: 100vh;
}

.code {
  border-radius: 4px;
  background: rgb(237, 237, 235);
  color: #ff5400;
  font-weight: 400;
  font-size: 0.9rem;
  padding: 2px;
  font-family: 'IBM Plex Mono', monospace;
}

.paragraph {
  margin-bottom: 40px;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  font-weight: 300;
}

h3 {
  font-size: 2rem;
  font-weight: bold;
}

h4 {
  margin-top: 10px;
  font-weight: 700;
}
.index {
  font-size: 14px;
  color: #4b4b4b;
  position: absolute;
  top: 20px;
  left: 0;
  overflow: hidden;
  max-height: calc(100vh - 140px);

  -ms-overflow-style: none; /* for Internet Explorer, Edge */
  scrollbar-width: none; /* for Firefox */
}

.index::-webkit-scrollbar {
  display: none; /* for Chrome, Safari, and Opera */
}

.row {
  display: flex;
  flex-direction: column;
}

.main-list-text {
  margin-left: 10px;
}

.content {
  padding-left: 100px;
  padding-right: 10px;
  font-size: 17px;
  position: absolute;
  right: 0;
  top: 20px;
  width: 750px;
  overflow: scroll;
  height: calc(100vh - 140px);
}

.main-list {
  display: flex;
  flex-direction: column;
}

.main-list-element {
  padding: 0px 7px;
  min-width: 220px;
  border-radius: 5px;
  display: flex;
  flex-direction: row;
  align-items: center;
  cursor: pointer;
}

/* second list will appear when i click the main element*/

.second-list {
  height: 0;
  opacity: 0;
  pointer-events: none;
  list-style: none;
  padding: 0px 0 10px 20px;
}

.arrow {
  opacity: 0.5;
}

.second-list-active {
  height: auto;
  opacity: 1;
  pointer-events: all;
}

.rotate {
  transform: rotate(90deg);
  opacity: 1;
}

.second-list-element {
  padding: 5px 7px;
  border-radius: 5px;
  display: flex;
  flex-direction: row;
  align-items: center;
  cursor: pointer;
}

.img-1 {
  height: 350px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.img1-container {
  height: 400px;
}

.img2-container {
  height: 350px;
}

img {
  height: 350px;
}

.img3-container {
  position: relative;
  height: 350px;
}

.img-3 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.img4-container {
  position: relative;
  height: 350px;
}
.img-4 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.img5-container {
  position: relative;
  height: 350px;
}
.img-5 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.img-6 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  height: 170px;
}

.img6-container {
  margin-top: 20px;
  position: relative;
  height: 170px;
  margin-bottom: 20px;
}

.img7-container {
  position: relative;
  height: 350px;
  margin-bottom: 30px;
}

.img8-container {
  position: relative;
  margin-bottom: 30px;
  height: 750px;
}

.img-8 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  height: 100%;
}

.img-7 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.img9-container {
  margin-top: 30px;
  position: relative;
  height: 350px;
  margin-bottom: 30px;
}

.img-9 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.img10-container {
  position: relative;
  height: 350px;
  margin-bottom: 30px;
}

.img-10 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
}

.img11-container {
  margin-top: 20px;
  margin-bottom: 30px;
  position: relative;
  height: 200px;
}

.img-11 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  height: 100%;
}
.home-arrow {
  font-size: 2rem;
  color: #848484;
  border-radius: 25px;
  padding: 10px;
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  nav {
    padding: 10px;
  }
  body {
    overflow-x: hidden;
  }

  .index {
    display: none;
  }

  .hero-content {
    max-width: 100%;
    position: relative;
  }

  .content {
    font-size: 1rem;
    max-width: 400px;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 40px;
    overflow-x: hidden;
  }
}

.underline {
  text-decoration: underline;
}