:root {
  --bg: #11161c;
  --panel: #1a2129;
  --text: #e8edf2;
  --muted: #9aa7b4;
  --line: #2b3642;
  --accent: #3d8fd1;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.45 "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.top, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 20px;
  color: var(--muted);
}
.shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 40px;
}
.eyebrow { color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; font-size: 12px; }
h1 { font-size: 28px; margin: 8px 0 12px; }
.lede, .hint { color: var(--muted); }
.modes { display: flex; gap: 8px; margin: 24px 0; }
.mode, #ask-submit, .choice {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
}
.mode.is-active, #ask-submit { background: var(--accent); border-color: var(--accent); }
#ask-submit:disabled { opacity: 0.6; cursor: wait; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
label { display: block; margin-bottom: 8px; }
textarea {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  margin-bottom: 12px;
}
.choices { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.result { margin-top: 16px; white-space: pre-wrap; }
.source { color: var(--muted); font-size: 14px; margin-top: 8px; }
.warn { color: #e2c37a; }
h2 { font-size: 18px; }