h1,
h2,
h3,
h4,
h5,
h6,
pre,
p {
  margin: 0 0 0.5em 0;
}
h3 {
  margin-top: 3rem;
}

html {
  font-size: 62.5%;
  color: #666;
}
body {
  margin: 0 auto;
  padding: 6rem 0 10rem;
  max-width: 1024px;
  width: 95%;
  font-size: 1.6rem;
}
header p {
  text-align: right;
}
img {
  margin: 0 auto;
  width: 100%;
  object-fit: cover;
}
ul {
  list-style-type: none;
}
li {
  margin-bottom: 0.25em;
}
input.ex-tab {
  margin-left: 3em;
}
main {
  width: 95%;
  margin: 0 auto;
}
label {
  display: inline-block;
  width: 6em;
  text-align: right;
}
fieldset {
  margin: 3rem 0;
  border: 1px dotted #666;
}
fieldset#porsonal span {
  font-size: small;
  color: red;
  margin-left: 0.5rem;
}
legend {
  font-size: 2rem;
  font-weight: bold;
}
input[type="text"] {
  font-size: 1.6rem;
  padding: 0.3rem;
  width: 20em;
}
fieldset.ex p {
  display: flex;
  flex-wrap: wrap;
}
fieldset.ex span {
  padding: 0 0.5rem;
}
p.selecter {
  padding: 1em;
  border: 1px dotted #333;
  border-radius: 0.3rem;
}
section#ex3-code pre {
  padding: 1em;
  margin-bottom: 3rem;
  border: 1px solid #ccc;
  border-radius: 7px;
  background-color: #eee;
}

p#submit_btn {
  text-align: center;
}
p#submit_btn input[type="submit"] {
  padding: 0.5rem 5rem;
  background-color: #ccc;
  border-color: #eee3;
  border-radius: 0.5rem;
  transition: 0.3s;
}
p#confirm_btn {
  margin: 1em 0;
  text-align: center;
}
p#confirm_btn label {
  color: red;
  width: initial;
}
p#submit_btn input[type="submit"]:hover {
  background-color: orange;
  border-color: #eee6;
  color: white;
  cursor: pointer;
}
main#compleat h2 {
  text-align: center;
  margin: 20rem;
}
footer {
  margin-top: 10rem;
  text-align: center;
}