:root {
  color-scheme: dark;
  --bg: #111418;
  --card: #1c2128;
  --text: #e6e8eb;
  --muted: #8b949e;
  --accent: #3fb950;
  --error: #f85149;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}

nav {
  position: sticky;
  top: 0;
  display: flex;
  background: var(--card);
  padding-top: env(safe-area-inset-top);
  z-index: 1;
}

nav button {
  flex: 1;
  padding: 14px 0;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 16px;
}

nav button.active { color: var(--text); border-color: var(--accent); }

main { padding: 16px; max-width: 640px; margin: 0 auto; }

.list { display: grid; gap: 10px; }

.list button, .primary {
  width: 100%;
  padding: 16px;
  border: 0;
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 17px;
  text-align: left;
}

.primary { background: var(--accent); color: #000; font-weight: 600; text-align: center; margin-top: 12px; }
.primary:disabled { opacity: 0.5; }

.link { background: none; border: 0; color: var(--accent); padding: 8px 0; font-size: 16px; }

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--card);
  padding: 12px;
  border-radius: 10px;
  font: 14px/1.5 ui-monospace, Menlo, Consolas, monospace;
}

label { display: block; margin: 10px 0; color: var(--muted); font-size: 14px; }
.row { display: flex; gap: 10px; }
.row label { flex: 1; }

input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 12px;
  border: 1px solid #30363d;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

textarea { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 15px; line-height: 1.5; min-height: 45vh; resize: vertical; field-sizing: content; }

.hint { color: var(--muted); font-size: 13px; }

#status { padding: 10px 12px; border-radius: 8px; background: var(--card); }
#last { color: var(--muted); }
#status.ok { color: var(--accent); }
#status.error { color: var(--error); }