.contact{
  max-width: 640px;
  margin-left: calc(50% - 280px);
  padding: 160px 20px;
}

.contact h2{
  font-size: 18px;
  margin-bottom: 24px;
}

.form-intro{
  font-size: 13px;
  line-height: 1.7;
  opacity: .7;
  margin-bottom: 64px;
}

form{
  display: flex;
  flex-direction: column;
  gap: 48px;
}

label, legend{
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

select, input, textarea{
  font-size: 14px;
  border: none;
  border-bottom: 1px solid #ccc;
  padding: 6px 0;
  background: transparent;
}

select:focus,
input:focus,
textarea:focus{
  outline: none;
  border-color: #666;
}

fieldset{
  border: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

fieldset label{
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

button{
  align-self: flex-start;
  background: none;
  border: none;
  font-size: 14px;
  cursor: pointer;
  opacity: .6;
}

button:hover{
  opacity: 1;
}

/* Contact 視認性を1段階アップ */
.contact h2{ font-size: 20px; }          /* 18 → 20 */
.form-intro{ font-size: 15px; }          /* 13 → 15 */
label, legend{ font-size: 14px; }        /* 12 → 14 */
select, input, textarea{ font-size: 16px; } /* 14 → 16 */
button{ font-size: 16px; }               /* 14 → 16 */