* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  min-height: 100%;
}

body {
  width: 100%;
  background: #000;
  color: #fff;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  padding: 2rem;
}

input,
button,
textarea {
  font: inherit;
  width: 100%;
  background: #000;
  color: #fff;
  border: 1px solid #fff;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
}

.mark {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 1rem;
}

.subline {
  margin-bottom: 0.4rem;
  color: #fff;
}

.block {
  margin-top: 2rem;
}

h1 {
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 1rem;
}

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.field {
  display: block;
  margin-bottom: 1rem;
}

.field span {
  display: block;
  margin-bottom: 0.5rem;
}

.inline {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
  align-items: center;
}

input,
button {
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
}

textarea {
  min-height: 18rem;
  padding: 0.75rem;
  resize: vertical;
  line-height: 1.4;
}

button {
  width: auto;
  cursor: pointer;
}

.indicator {
  display: inline-block;
  min-height: 1rem;
  color: #fff;
}

.indicator.is-error {
  text-decoration: underline;
}

.is-error {
  color: #fff;
  text-decoration: underline;
}

@media (max-width: 900px) {
  body {
    padding: 1rem;
  }

  .columns,
  .inline {
    grid-template-columns: 1fr;
  }
}