:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --border: #2a2e37;
  --text: #e6e8ec;
  --muted: #9aa0a8;
  --accent: #4f8cff;
  --ok: #2ecc71;
  --warn: #f1c40f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
.app { max-width: 760px; margin: 0 auto; padding: 24px 20px 60px; }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
h1 { font-size: 1.35rem; margin: 0; }
.status { color: var(--muted); font-size: 0.85rem; min-height: 1.2em; }
.question-card { background: var(--card); padding: 20px 24px; border-radius: 14px; margin: 20px 0; border: 1px solid var(--border); }
.q-num { color: var(--accent); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
#question { font-size: 1.25rem; margin: 8px 0 0; font-weight: 600; }
.answer-area textarea {
  width: 100%; min-height: 170px; background: var(--card); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px;
  font-size: 1rem; font-family: inherit; resize: vertical; line-height: 1.5;
}
.answer-area textarea:focus { outline: none; border-color: var(--accent); }
.row { margin-top: 12px; }
button.primary {
  background: var(--accent); color: #fff; border: none; padding: 11px 20px;
  border-radius: 9px; font-size: 1rem; font-weight: 600; cursor: pointer;
}
button.primary:disabled { opacity: 0.45; cursor: default; }
.feedback, .notes { background: var(--card); padding: 16px 20px; border-radius: 14px; margin-top: 16px; border: 1px solid var(--border); }
.feedback .score { font-size: 1.05rem; }
.feedback ul { padding-left: 20px; margin: 6px 0 0; }
.feedback li { margin: 4px 0; }
.actions { margin-top: 16px; }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
.notes pre { white-space: pre-wrap; background: #10131a; padding: 12px 14px; border-radius: 8px; font-size: 0.85rem; border: 1px solid var(--border); overflow-x: auto; }
.hidden { display: none; }