body {
  font-family: 'El Messiri';
  margin: 0;
  padding: 0;
  background-image: linear-gradient(135deg, rgba(255, 255, 255, .50) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .50) 50%, rgba(255, 255, 255, .50) 75%, transparent 75%, transparent);
  background-size: 200px 200px;
}
h1 {
  font: bold 25px 'El Messiri';
}
h4 {
  font: bold 16px 'El Messiri';
}
label {font-size: 20px;}
.main {
  border: 1px solid #999;
  border-radius: 20px;
  width: 90%;
  margin: 0 auto;
  text-align: center;
}
.main h2 {
  background-color: #FFFFFF;
  color: #000;
  padding: 10px;
  margin-top: auto;
  border-radius: 20px 20px 0px 0px;
}
.main h3 {
  background-color: #FFFFFF;
  color: #000;
  padding: 10px;
  margin-top: auto;
}
.main3, p {
    justify-content: center;
    text-align: center;

}
.mark {
  background-color: #f7fc82;
  padding: 0px 15px;
}
.dor {
  width: 150px;
  font-size: 14pt;
  border-radius: 7px;
}
.res {
  display: inline-flex;
  width: 100%;
  font-size: 20px;
}
.res p {
  width: 33%;
}
.H1 ul {
  list-style: none;
  padding: 10px;
  display: inline-flex;
}
.btn-calc, .btn-clear {
  background-color: #e58660;
  width: 140px;
  padding: 10px;
  margin: 0 0 0 5px;
  border-radius: 5px;
  color:#FFF;
}

.t1 {
  display: inline-block;
  border-radius: 4px;
  background-color: #cc15cd;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 16px;
  padding: 8px;
  width: 25%;
  transition: all 0.5s;
  margin: 0 0 0 10px;
  text-decoration: none;
}

.theme-toggle {
  text-align: center;
}
@media screen and (max-width: 700px) {
  .res {
    display: inline-block;
    width: 100%;
  }
  .res p {
    width: 100%;
  }
  .H1 ul {
    list-style: none;
    padding: 10px;
    display: inline-flex;
  }
  .H1 ul li {
    background-color: #e58660;
    width: 100px;
    padding: 10px;
    margin: 0 0 0 5px;
    border-radius: 5px;
    color: #FFF;
  }
}