UPDATE.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700;800;900&display=swap');
*
{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins' ,sans-serif;
}
body
{
  background: #293241;
  padding: 0 10px;
}
.box 
{
  max-width: 850px;
  width: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  background: #ee6c4d;
  border-radius: 25px;
  margin: 20px auto;
  box-shadow: 1px 1px 2px rgba(0,0,0,0.125);
  padding: 30px;
}

.box .title
{
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 25px;
  color: #293241;
  text-transform: uppercase;
  text-align: center;
}

.box .form
{
  width: 100%;
}

.box .form .inputfield
{
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.box .form .inputfield label
{
  width: 200px;
  color: #fff;
  margin-right: 10px;
  font-size: 18px;
}

.box .form .inputfield .input,
.box .form .inputfield .textarea
{
  width: 100%;
  outline: none;
  border: 1px solid #2b2d42;
  font-size: 15px;
  padding: 8px 10px;
  border-radius: 3px;
  transition: all 0.3s ease;
}

.box .form .inputfield .textarea
{
  width: 100%;
  height: 150px;
  resize: none;
}

.box .form .inputfield .input:focus,
.box .form .inputfield .textarea:focus,
.box .form .inputfield .custom_select select:focus
{
  border: 1px solid #e63946;
}

.box .form .inputfield p
{
  font-size: 14px;
  padding-left: 25px;
  color: #fff;
} 
.box .form .inputfield .check
{
  width: 15px;
  height: 15px;
  position: relative;
  padding-left: 300px;
  display: block;
  cursor: pointer;
}
.box .form .inputfield .check input[type="checkbox"]
{
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}
.box .form .inputfield .check .checkmark
{
  width: 15px;
  height: 15px;
  border: 1px solid #293241;
  display: block;
  position: relative;
}
.box .form .inputfield .check .checkmark:before
{
  content: "";
  position: absolute;
  top: 1px;
  left: 2px;
  width: 5px;
  height: 2px;
  border: 2px solid;
  border-color: transparent transparent #fff #fff;
  transform: rotate(-45deg);
  display: none;
}
.box .form .inputfield .check input[type="checkbox"]:checked ~ .checkmark
{
  background: #293241;
}

.box .form .inputfield .check input[type="checkbox"]:checked ~ .checkmark:before
{
  display: block;
}

.box .form .inputfield .btn
{
  border: 0;
  background: none;
  display: block;
  margin: 20px auto;
  text-align: center;
  border: 2px solid #000;
  padding: 14px 40px;
  outline: none;
  color: white;
  border-radius: 24px;
  transition: 0.25px;
  cursor: pointer;
}

.box .form .inputfield .btn:hover
{
  background: #293241;
}

.box .form .inputfield:last-child
{
  margin-bottom: 0;
}

@media (max-width:420px) {
  .box .form .inputfield{
    flex-direction: column;
    align-items: flex-start;
  }
  .box .form .inputfield label{
    margin-bottom: 5px;
  }
  .box .form .inputfield.terms{
    flex-direction: row;
  }
}