body {
  font-family: "Roboto", sans-serif;
}
.space {
  padding-left: 50px;
  padding-right: 50px;
}
/*********header***************/
header,
footer {
  background-color: rgba(0, 0, 0, 0.764);
  color: white;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header .burger {
  display: none;
}
ul {
  display: flex;
  justify-content: flex-end;
  gap: 15px;
  margin-right: 25px;
}
nav ul li a {
  text-decoration: none;
  color: white;
}
/********Titres*************/
h2 {
  font-size: 24px;
  margin-top: 15px;
  margin-bottom: 20px;
  font-weight: bold;
}
section[id="partie1"] h2 {
  margin-top: 50px;
}
section[id="partie2"] h2 {
  margin-top: 20px;
  margin-bottom: 20px;
}
h3 {
  font-size: 20px;
  margin-bottom: 10px;
  font-weight: bold;
}
/*************articles/*************/
.flex {
  display: flex;
  flex-direction: row;
  gap: 20px;
}
article a {
  display: inline-block;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  background-color: rgb(25, 165, 241);
  padding: 10px;
  text-transform: uppercase;
}
a[href="https://google.com"]
{
  color: rgb(53, 44, 33);
}
article {
  border: 1px solid black;
  width: 50%;
}
article img {
  width: 100%;
}
.content {
  padding: 5%;
}
/************les parties*************/
section[id="partie2"] {
  background-color: black;
  padding-top: 20px;
  padding-bottom: 20px;
  margin-top: 50px;
}
section[id="partie2"] * {
  background-color: black;
  color: white;
  margin-bottom: 0px;
}
section[id="partie3"] h1 {
  text-align: left;
}
section[id="partie3"] iframe {
  width: 100%;
  height: 700px;
}
section[id="partie1"] p,
section[id="partie2"] {
  margin-bottom: 50px;
}
/*************footer*************/
footer {
  background-color: rgba(0, 0, 0, 0.764);
  color: white;
  text-align: center;
  padding-top: 35px;
  padding-bottom: 35px;
  margin-top: 100px;
}
/*********responsive***************/
@media screen and (max-width: 720px) {
  body {
    text-align: justify;
  }
  .flex {
    flex-direction: column;
    align-items: center;
  }
  article {
    width: 100%;
  }
  section[id="partie3"] iframe {
    width: 100%;
    height: 300px;
  }
  div[class="espace"] p {
    margin-bottom: 30px;
  }
  article a {
    margin-bottom: 5px;
  }
  .space {
    padding-left: 15px;
    padding-right: 15px;
  }
  header .burger {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  header .burger .line {
    width: 30px;
    height: 3px;
    background-color: white;
    margin-right: 15px;
  }
  ul {
    display: none;
  }
  footer {
    margin-top: 40px;
  }
}