style.css

/*! normalize.css v8.0.0, minified, line broken */
button,hr,input{overflow:visible}progress,sub,sup{vertical-align:baseline}[type=
checkbox],[type=radio],legend{box-sizing:border-box;padding:0}html{line-height:
1.15;-webkit-text-size-adjust:100%}body{margin:0}h1{font-size:2em;margin:.67em 0
}hr{box-sizing:content-box;height:0}code,kbd,pre,samp{font-family:monospace,
monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom
:none;text-decoration:underline;text-decoration:underline dotted}b,strong{
font-weight:bolder}small{font-size:80%}sub,sup{font-size:75%;line-height:0;
position:relative}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,
input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:
1.15;margin:0}button,select{text-transform:none}[type=button],[type=reset],[type
=submit],button{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=
reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button
::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[
type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{
outline:ButtonText dotted 1px}fieldset{padding:.35em .75em .625em}legend{color:
inherit;display:table;max-width:100%;white-space:normal}textarea{overflow:auto}[
type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button
{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[
type=search]::-webkit-search-decoration{-webkit-appearance:none}
::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{
display:block}summary{display:list-item}[hidden],template{display:none}

body {
  font: 16px / 1.5 'Helvetica Neue';
  margin: 3vh 0;
}

button {
  width: 4rem;
}

form {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 1rem;
  margin: 3vh 3vw;
  min-width: 15vw;
}

h1 {
  text-align: center;
}

h2 {
  color: green;
  margin: 0;
}

main {
  align-items: flex-start;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

textarea {
  resize: vertical;
  border-color: #ddd;
}