:root {
  --font-mono: ui-monospace, monospace;
  --radius: 6px;
  --color-bg: #0c0c0e;
  --color-white: 255 255 255;
  --color-surface: rgb(var(--color-white) / 0.04);
  --color-border: rgb(var(--color-white) / 0.1);
  --color-text: #d4d4d8;
  --color-text-bright: #fafafa;
  --color-error: #f87171;
}

body {
  font-family: var(--font-mono);
  background: var(--color-bg);
  color: var(--color-text);
}

a { color: #93c5fd; }
a:visited { color: #f0abfc; }

main {
  width: min(100% - 2rem, 75rem);
  margin-inline: auto;
  padding-block: clamp(1.5rem, 5vw, 3.75rem);
}

select {
  font-family: var(--font-mono);
  background: var(--color-surface);
  color: var(--color-text-bright);
  border: 1px solid var(--color-border);
}

#controls select {
  padding: 0.25rem;
  border-radius: var(--radius);
}

.layout {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) 1fr;
  gap: 1rem;
  padding-block: clamp(1rem, 3vw, 2rem);
}

#previews {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  #previews {
    grid-template-columns: 1fr;
  }
}

.preview {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-height: 15rem;
}

.preview .title {
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem;
}

.preview pre {
  padding: 0.75rem;
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.5;
}

.preview-line {
  opacity: 0.5;
}

.preview-line.active {
  opacity: 1;
  color: var(--color-text-bright);
}

.preview-line.error {
  opacity: 1;
  color: var(--color-error);
}