html,
body {
  overflow-x: hidden;
}

main {
  display: block;
}

.bg-soft {
  background: var(--color-bg-soft);
}

.bg-blue {
  background: var(--color-bg-blue);
}

.bg-dark {
  background: var(--color-black);
  color: var(--color-white);
}

.stack {
  display: flex;
  flex-direction: column;
}

.section-head {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.section-head--tight {
  margin-bottom: 8px;
}