style.css

body {
    font-family: Sans-serif, Arial;
  }
  
  nav {
    height: 15vh;
    display: flex;
    justify-content: space-between;
  }
  
  ul {
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    width: 30vw;
  }
  section.options-menu {
    display: flex;
  }
  /*images*/
  
  section.image-menu {
    display: flex;
    align-items: center;
  }
  
  img.green-logo {
    height: 10vh;
    margin-left: 30px;
  }
  
  img.concert {
    width: 100%;
  }
  
  /* Container holding the image and the text */
  .container-concert {
    position: relative;
    text-align: center;
    color: white;
  }
  .centered {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  .centered h1 {
    font-size: 3em;
  }
  .centered h2 {
    font-size: 1.5em;
    opacity: 0.6;
  }
  
  /*section white*/
  
  section.white {
    display: flex;
    align-items: center;
    justify-content: space-around;
  }
  
  .speaker {
    width: 25%;
  }
  
  .wave {
    width: 25%;
  }
  
  .device {
    width: 25%;
  }
  section.white img {
    width: 40%;
  }
  
  section.white > div {
    display: flex;
    align-items: center;
    flex-direction: column;
  }
  
  h2.what {
    font-size: 1.5em;
    text-align: center;
    text-decoration: underline;
    text-decoration-color: #1ab26b;
  }
  
  section.white h3 {
    color: #15b07c;
  }
  
  section.white p {
    text-align: center;
  }
  /*footer*/
  
  footer {
    background-color: #1ab26b;
    display: flex;
    justify-content: space-around;
    align-items: center;
  }
  
  section.text-green {
    height: 80vh;
  }
  
  .text-green {
    width: 30%;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    justify-content: space-evenly;
  }
  
  .text-green h2 {
    text-decoration: underline;
  }
  
  img.white-logo {
    height: 5em;
  }
  
  img.screenshot {
    height: 30em;
  }