Çözüldü Siteye navbar ekleyince sayfa bozuluyor

*{
  margin: 0;
  padding: 0;
  font-family: "montserrat",sans-serif;
  box-sizing: border-box;
}
body{
  background: #f1f1f1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
 .contact-info{
  display: flex;
  width: 100%;
  max-width: 1200px;
  align-items: center;
  justify-content: center;
  padding: 0 a;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}


.card{
  background: #2f3542;
  padding: 0 20px;
  margin: 0 10px;
  width: calc(33% - 20px);
  height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #fff;
  cursor: pointer;
}

.card a{
    text-decoration: none;
    color: #fff;
}

.card-icon{
  font-size: 28px;
  background: #ff6348;
  width: 60px;
  height: 60px;
  text-align: center;
  line-height: 60px !important;
  border-radius: 50%;
  transition: 0.3s linear;
}

.card:hover .card-icon{
  background: none;
  color: #ff6348;
  transform: scale(1.6);
}

.card p{
  margin-top: 20px;
  font-weight: 300;
  letter-spacing: 2px;
  max-height: 0;
  opacity: 0;
  transition: 0.3s linear;
}

.card:hover p{
  max-height: 40px;
  opacity: 1;
}

nav{
  display: flex;
    height: 80px;
    width: 100%;
    background: #ddd;
    align-items: center;
    justify-content: space-between;
    padding: 0 50px 0 100px;
    flex-wrap: wrap;
}
nav .logo{
  color: #012E40;
  font-size: 35px;
  font-weight: 600;
}
nav .logo span{
    color: #015958;
}
nav ul{
  display: flex;
  flex-wrap: wrap;
  list-style: none;
}
nav ul li{
  margin: 0 5px;
}
nav ul li a{
  color: #111;
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
  padding: 8px 15px;
  border-radius: 5px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
}
nav ul li a.active,
nav ul li a:hover{
  color: #111;
  background: #fff;
}
nav .menu-btn i{
  color: #000;
  font-size: 22px;
  cursor: pointer;
  display: none;
}
input[type="checkbox"]{
  display: none;
}