style.css

body {
  font-family: Arial, sans-serif;
  font-size: 14px;
  width: 80%;
  margin: 10px auto;
}

h2 {
  margin: 0.5em 0;
}

section.letter {
  font-size: 22px;
  font-family: "Dancing Script", cursiv;
  color: #09093c;
  background-color: #f8f0ce;
  line-height: 52px;
  padding: 10px 20px;
  margin: 20px auto;
  box-shadow: 0 0 1px 0px #000, 1px 1px 3px 0 #000;
  /*transform: rotate(-1deg);*/
}

section.letter p {
  margin: 0;
}

section.letter.print {
  background-color: #fff;
}

input, textarea {
  border: none;
  border-bottom: solid 1px currentcolor;
  font-family: "Dancing Script", cursiv;
  font-size: 22px;
  padding: 0 10px;
  background-color: transparent;
}

input.short{
  width: 5em;
}

input.long{
  width: 14em;
}

input[type=number]{
  width:3em;
}

button {
  padding: 8px 2px;
  box-sizing: border-box;
  width: 36px;
  height: 36px;
  border-radius: 5px;
  background-color: rgba(218, 132, 48, 0.44);
  box-shadow: inset 0   0   0px 2px rgb(231,177,82),
                    1px 1px 0px     rgba(0, 0, 0, 0.54);
  border: none;
}

button:hover {
  box-shadow: inset 0 0 0px 2px rgb(231,177,82),
                    1px 1px 0px rgba(0, 0, 0, 0.54),
              inset 0px 0px 10px rgba(0, 0, 0, 0.25);
}

button:active {
  box-shadow: inset 0 0 0px 2px rgb(231,177,82),
                    1px 1px 0px rgba(0, 0, 0, 0.54),
              inset 0px 0px 10px rgba(0, 0, 0, 0.5);
}

button.wide{
  width: 60px;
}

button.very-wide{
  width: 120px;
}

button svg {
   width: 20px;
   height: 20px;
 }

 button span {
   display: none;
 }

@media screen and (max-width: 720px){
  body{
    width: 95%;
  }
}