:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #7ee787;
  --link: #79c0ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

header {
  padding: 2rem 1.5rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.4rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--accent);
}

.caret { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

header p { margin: 0.4rem auto; max-width: 46rem; color: var(--muted); }
.links a { color: var(--link); text-decoration: none; }
.links a:hover { text-decoration: underline; }

.badge {
  font-size: 0.85rem;
  vertical-align: middle;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
  text-decoration: none;
  font-family: ui-monospace, monospace;
}
.badge:hover { border-color: var(--accent); }

#examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  padding: 0.5rem 1.5rem 0;
  max-width: 1400px;
  margin: 0 auto;
}

.chip {
  font: 0.85rem ui-monospace, monospace;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  cursor: pointer;
}
.chip:hover { border-color: var(--link); }
.chip.active { border-color: var(--accent); color: var(--accent); }

.blurb {
  text-align: center;
  max-width: 46rem;
  margin: 0.5rem auto 0;
  padding: 0 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  min-height: 1.2rem;
}

.pane h2 button {
  float: right;
  font: 0.8rem ui-monospace, monospace;
  color: var(--link);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.15rem 0.6rem;
  cursor: pointer;
}
.pane h2 button:hover { border-color: var(--link); }

main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 1rem 1.5rem 3rem;
  max-width: 1400px;
  margin: 0 auto;
}

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

.pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
}

.pane h2 { margin: 0 0 0.2rem; font-size: 1.05rem; }
.hint { margin: 0 0 0.6rem; color: var(--muted); font-size: 0.85rem; }

textarea, .out {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0b0f14;
  color: var(--fg);
  padding: 0.7rem;
  width: 100%;
}

textarea { height: 16rem; resize: vertical; outline: none; }
textarea:focus { border-color: var(--accent); }

.out {
  margin: 0.6rem 0 0;
  white-space: pre-wrap;
  overflow-x: auto;
  min-height: 8rem;
  flex: 1;
}
.out.error { color: #ff7b72; }

footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  padding: 0.4rem 1rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  font-family: ui-monospace, monospace;
}