:root {
  color-scheme: dark;
  --bg: #0d1117;
  --fg: #c9d1d9;
  --muted: #6e7681;
  --panel: #161b22;
  --border: #30363d;
  --accent: #1f6feb;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, sans-serif;
  font-size: 14px;
  line-height: 1.45;
}

.hdr {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.hdr h1 {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}
.subtitle {
  color: var(--muted);
  font-size: 13px;
}
.subtitle code,
.input-controls code,
.footer code {
  background: rgba(110, 118, 129, 0.18);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
}
.repo-link {
  margin-left: auto;
  color: var(--accent);
  text-decoration: none;
}
.repo-link:hover { text-decoration: underline; }

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 420px) 1fr;
  height: calc(100vh - 56px - 36px); /* header + footer */
  min-height: 500px;
}

@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(220px, 40vh) 1fr;
    height: auto;
  }
}

.input-pane {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--panel);
  min-height: 0;
}

.input-controls {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  align-items: end;
}

.input-controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.input-controls select,
.input-controls button {
  padding: 5px 10px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
}
.input-controls button {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  align-self: end;
}
.input-controls button.ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.input-controls button:hover { filter: brightness(1.15); }
.input-controls button:disabled { opacity: 0.55; cursor: progress; }

#input {
  flex: 1;
  min-height: 200px;
  resize: none;
  padding: 12px;
  background: var(--bg);
  color: var(--fg);
  border: none;
  border-bottom: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 12px;
}
#input:focus { outline: none; }

.status {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  background: var(--bg);
  white-space: pre-wrap;
  word-break: break-word;
}
.status.error {
  color: #ff7b72;
}
.status.success {
  color: #56d364;
}

.output-pane {
  overflow: auto;
  padding: 24px;
}

.placeholder {
  color: var(--muted);
  font-style: italic;
  padding: 32px;
  text-align: center;
}

.footer {
  padding: 8px 24px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
}