* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
}

.topbar {
  padding: 24px 16px 16px;
  text-align: center;
  background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
  border-bottom: 1px solid #30363d;
}

.topbar h1 { margin: 0; font-size: 1.5rem; font-weight: 600; }
.topbar .sub { margin: 4px 0 0; font-size: 0.85rem; color: #8b949e; }

main { max-width: 820px; margin: 0 auto; padding: 16px; }

.input-section, .output-section, .about {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

#example {
  background: #0d1117;
  border: 1px solid #30363d;
  color: #c9d1d9;
  border-radius: 6px;
  padding: 5px 10px;
  font-family: inherit;
  font-size: 0.85rem;
  flex: 1 1 200px;
  max-width: 360px;
}

.lang-toggle { display: flex; gap: 4px; }

.lang-toggle .lang {
  background: #21262d;
  border: 1px solid #30363d;
  color: #8b949e;
  border-radius: 6px;
  padding: 5px 14px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
}

.lang-toggle .lang.active { background: #1f6feb; border-color: #1f6feb; color: #fff; }

#sql {
  width: 100%;
  background: #0d1117;
  border: 1px solid #30363d;
  color: #c9d1d9;
  border-radius: 6px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  resize: vertical;
}

.summary {
  font-size: 1rem;
  font-weight: 600;
  color: #ffd33d;
  margin-bottom: 12px;
}

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0;
}

.steps li {
  counter-increment: step;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid #1c2331;
}

.steps li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #1f6feb;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: ui-monospace, monospace;
}

.steps .clause {
  display: inline-block;
  font-family: ui-monospace, monospace;
  font-size: 0.7rem;
  color: #79c0ff;
  background: #1c2331;
  padding: 1px 7px;
  border-radius: 3px;
  margin-right: 8px;
  vertical-align: middle;
}

.steps .text { font-size: 0.92rem; }

.error {
  color: #ff7b72;
  background: #3d1418;
  border: 1px solid #f85149;
  border-radius: 6px;
  padding: 10px 12px;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
}

.about h2 { margin-top: 0; font-size: 1.05rem; }
.about p { font-size: 0.9rem; }
.about code {
  font-family: ui-monospace, monospace;
  font-size: 0.85em;
  background: #21262d;
  padding: 1px 5px;
  border-radius: 3px;
}
.order-flow { font-size: 0.85rem; }
.dim { color: #8b949e; font-size: 0.85rem; }
.about a { color: #58a6ff; }

footer {
  border-top: 1px solid #30363d;
  padding: 16px;
  text-align: center;
  font-size: 0.85rem;
  color: #8b949e;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 820px;
  margin: 24px auto 0;
}

footer a { color: #58a6ff; }