html {
  font-size: 16px;
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
  background: #f5f6f8;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
  box-shadow: 0 0 0 0.1rem #fff, 0 0 0 0.25rem #2f6fed;
}

.converter {
  width: min(760px, 100%);
  margin: 48px auto;
  padding: 32px;
  background: #fff;
  border: 1px solid #d9dde5;
  border-radius: 8px;
}

.converter__header {
  margin-bottom: 28px;
}

.converter__header h1 {
  margin: 0 0 10px;
  font-size: 32px;
  font-weight: 700;
}

.converter__header p {
  max-width: 620px;
  margin: 0;
  color: #596171;
}

.converter__form {
  display: grid;
  gap: 14px;
}

.converter__form .btn {
  justify-self: start;
  min-width: 180px;
}

.converter__rules {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
  color: #4d5668;
}

.converter__rules strong {
  margin-right: 4px;
}

.converter__rules span {
  padding: 4px 8px;
  border: 1px solid #d9dde5;
  border-radius: 6px;
  background: #fafbfc;
}