:root {
  --bg: #0e1116;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --good: #3fb950;
  --bad: #f85149;
  --warn: #d29922;
  --panel: #161b22;
  --panel-2: #1c232c;
  --border: #30363d;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px; line-height: 1.5;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header h1 {
  font-size: 1.75rem;
  margin: 0 0 0.25rem;
  letter-spacing: -0.01em;
}

.lede {
  margin: 0 0 1rem;
  color: var(--muted);
}

.lede code {
  background: var(--panel);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.warning {
  background: rgba(210, 153, 34, 0.12);
  border: 1px solid rgba(210, 153, 34, 0.4);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 0 0 2rem;
  font-size: 0.92rem;
  color: #f0d384;
}

.warning strong { color: #ffe5a3; }

a { color: var(--accent); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.panel h2 {
  font-size: 1.1rem;
  margin: 0 0 1rem;
  color: var(--fg);
}

.row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 0.75rem;
}

.row label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.row label.grow { flex: 1; min-width: 200px; }

.block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

button {
  font: inherit;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #0d1117;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
}

button:hover {
  filter: brightness(1.1);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select, input[type="text"], textarea {
  font: inherit;
  font-size: 0.95rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--fg);
  border-radius: 6px;
  width: 100%;
}

textarea {
  resize: vertical;
  min-height: 4em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

input[type="text"][readonly], textarea[readonly] {
  background: var(--bg);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.output {
  margin-top: 0.5rem;
}

.status {
  font-size: 0.9rem;
  padding: 0.4rem 0;
}

.status.ok    { color: var(--good); }
.status.error { color: var(--bad); }

footer {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

footer code {
  background: var(--panel);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}