:root {
  --science-ink: #172033;
  --science-muted: #607086;
  --science-line: #d8e1eb;
  --science-blue: #155eef;
  --science-teal: #0f8a70;
  --science-amber: #b45309;
  --science-red: #c2414b;
  --science-surface: #ffffff;
  --science-soft: #f5f8fc;
  --science-radius: 8px;
  --science-shadow: 0 6px 18px rgba(23, 32, 51, .06);
  --science-motion: 180ms ease;
}

.adaptive-strip {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(240px, 1.25fr) auto;
  align-items: center;
  gap: 18px;
  margin: 14px 0;
  padding: 18px 20px;
  border-top: 3px solid var(--science-teal);
  border-bottom: 1px solid var(--science-line);
  background: #f2fbf8;
}
.adaptive-strip small,
.knowledge-section>header small,
.exam-prediction small,
.guardian-report small {
  color: var(--science-teal);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .14em;
}
.adaptive-strip h2 { margin: 4px 0; color: var(--science-ink); font-size: 18px; }
.adaptive-strip p { margin: 0; color: var(--science-muted); font-size: 11px; }
.adaptive-reasons { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.adaptive-reasons span { min-width: 0; padding: 8px; border-left: 3px solid #67bca8; background: #fff; color: var(--science-muted); font-size: 10px; }
.adaptive-reasons b { display: block; overflow: hidden; color: var(--science-ink); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.adaptive-strip>a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 15px;
  border-radius: 6px;
  background: var(--science-teal);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.knowledge-section { margin: 24px 0 18px; }
.knowledge-section>header { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.knowledge-section>header h2 { margin: 3px 0 0; color: var(--science-ink); font-size: 20px; }
.knowledge-section>header>span { color: var(--science-muted); font-size: 10px; }
.knowledge-map { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 8px; }
.knowledge-node { position: relative; min-width: 0; padding: 14px; border: 1px solid var(--science-line); border-radius: var(--science-radius); background: var(--science-surface); box-shadow: var(--science-shadow); }
.knowledge-node.mastered { border-top: 3px solid var(--science-teal); }
.knowledge-node.developing { border-top: 3px solid var(--science-blue); }
.knowledge-node.weak { border-top: 3px solid var(--science-red); }
.knowledge-node.unmeasured { border-top: 3px solid #94a3b8; }
.knowledge-node-head { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; align-items: start; gap: 8px; }
.knowledge-node-head>span { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 6px; background: #eaf1fa; color: #23476e; font-size: 11px; font-weight: 800; }
.knowledge-node-head h3 { margin: 0; overflow-wrap: anywhere; color: var(--science-ink); font-size: 13px; }
.knowledge-node-head small { display: block; margin-top: 2px; color: var(--science-muted); font-size: 9px; }
.knowledge-node-head b { padding: 3px 6px; border-radius: 4px; background: var(--science-soft); color: var(--science-muted); font-size: 9px; white-space: nowrap; }
.knowledge-meter { height: 6px; margin: 12px 0 7px; overflow: hidden; border-radius: 3px; background: #e5eaf0; }
.knowledge-meter i { display: block; height: 100%; background: linear-gradient(90deg, var(--science-blue), var(--science-teal)); }
.knowledge-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.knowledge-meta strong { color: var(--science-ink); font-size: 17px; }
.knowledge-meta span { color: var(--science-muted); font-size: 9px; text-align: right; }
.knowledge-topics { display: flex; flex-wrap: wrap; gap: 4px; min-height: 20px; margin-top: 8px; }
.knowledge-topics span { padding: 2px 5px; border: 1px solid #dce5ef; border-radius: 4px; color: #52657a; font-size: 8px; }
.knowledge-node>a { display: block; margin-top: 9px; color: var(--science-blue); font-size: 10px; font-weight: 800; text-align: right; }

.mode-card.adaptive { margin: 12px 0; border: 1px solid #99d8ca; background: #f1fbf8; }
.mode-card.adaptive .mc-icon { background: var(--science-teal); color: #fff; }
.adaptive-card-count { margin-left: auto; padding: 4px 7px; border-radius: 4px; background: #d8f3ec; color: #0b6a58; font-size: 10px; font-weight: 800; white-space: nowrap; }

.practice-resume-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 0 0 14px; padding: 16px 18px; border-left: 4px solid var(--science-blue); background: #f3f7ff; color: var(--science-ink); }
.practice-resume-card small { color: var(--science-blue); font-size: 9px; font-weight: 800; }
.practice-resume-card h2 { margin: 4px 0; font-size: 17px; }
.practice-resume-card p { margin: 0; color: var(--science-muted); font-size: 11px; }
.practice-resume-card>div:last-child { display: flex; gap: 6px; }
.practice-resume-card a, .practice-resume-card button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 11px; border: 1px solid #b7c7da; border-radius: 6px; background: #fff; color: #29435f; font-size: 11px; font-weight: 800; cursor: pointer; }
.practice-resume-card a { border-color: var(--science-blue); background: var(--science-blue); color: #fff; }

.exam-prediction { display: grid; grid-template-columns: minmax(160px, .8fr) 1.4fr; gap: 16px; margin-bottom: 14px; padding: 17px 18px; border-left: 4px solid var(--science-teal); background: #f3faf8; }
.exam-prediction h2 { margin: 4px 0 2px; color: var(--science-ink); font-size: 20px; }
.exam-prediction p { margin: 0; color: var(--science-muted); font-size: 10px; line-height: 1.6; }
.prediction-range { display: flex; align-items: center; justify-content: center; gap: 10px; }
.prediction-range strong { color: var(--science-ink); font-size: 32px; font-variant-numeric: tabular-nums; }
.prediction-range span { color: var(--science-muted); font-size: 11px; }
.prediction-sample { display: flex; justify-content: center; gap: 12px; margin-top: 6px; color: var(--science-muted); font-size: 9px; }

.guardian-report { margin: 24px 0; padding: 20px 0; border-top: 3px solid #23476e; border-bottom: 1px solid var(--science-line); color: var(--science-ink); }
.guardian-report-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.guardian-report h2 { margin: 4px 0; font-size: 20px; }
.guardian-report-head p { margin: 0; color: var(--science-muted); font-size: 11px; }
.guardian-report-actions { display: flex; gap: 6px; }
.guardian-report-actions button { min-height: 38px; padding: 0 12px; border: 1px solid #b9c7d6; border-radius: 6px; background: #fff; color: #29435f; font-weight: 800; cursor: pointer; }
.guardian-report-actions button:first-of-type { border-color: #23476e; background: #23476e; color: #fff; }
.guardian-report-actions select { min-height: 38px; max-width: 130px; border: 1px solid #b9c7d6; border-radius: 6px; background: #fff; padding: 0 8px; color: #29435f; font-weight: 700; }
.guardian-report-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 16px; border-top: 1px solid var(--science-line); border-bottom: 1px solid var(--science-line); }
.guardian-report-grid div { padding: 13px 8px; border-right: 1px solid var(--science-line); text-align: center; }
.guardian-report-grid div:last-child { border-right: 0; }
.guardian-report-grid strong { display: block; font-size: 21px; }
.guardian-report-grid span { color: var(--science-muted); font-size: 10px; }
.guardian-report-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 16px; }
.guardian-report-detail h3 { margin: 0 0 7px; font-size: 13px; }
.guardian-report-detail p { margin: 5px 0; color: var(--science-muted); font-size: 11px; }
.guardian-report-detail b { color: var(--science-ink); }
.guardian-report-note { margin: 14px 0 0; color: var(--science-muted); font-size: 9px; }

.english-audio-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 9px 0 2px; padding-top: 8px; border-top: 1px solid #e2e8f0; }
.english-audio-tools button { display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 10px; border: 1px solid #b9c9da; border-radius: 6px; background: #fff; color: #29435f; font-size: 11px; font-weight: 800; cursor: pointer; }
.english-audio-tools button.active { border-color: var(--science-red); background: #fff1f2; color: #a52d3b; }
.english-audio-tools button:disabled { opacity: .45; cursor: not-allowed; }
.english-audio-status { min-width: 90px; color: var(--science-muted); font-size: 10px; }

.math-step-feedback { margin: 12px 0; padding: 13px 14px; border-left: 4px solid var(--science-teal); background: #f2fbf8; color: #285147; font-size: 12px; text-align: left; }
.math-step-feedback.warning { border-left-color: var(--science-amber); background: #fff8eb; color: #7c4512; }
.math-step-feedback strong { display: block; margin-bottom: 3px; color: inherit; }
.math-step-feedback ul { margin: 6px 0 0; padding-left: 18px; }
.math-work-input { min-height: 118px; line-height: 1.7; }

@media (max-width: 700px) {
  .adaptive-strip { grid-template-columns: 1fr; gap: 12px; padding: 15px 13px; }
  .adaptive-reasons { grid-template-columns: 1fr; }
  .adaptive-strip>a { width: 100%; }
  .knowledge-map { grid-template-columns: 1fr; }
  .exam-prediction { grid-template-columns: 1fr; }
  .guardian-report-head { flex-direction: column; }
  .guardian-report-actions { width: 100%; }
  .guardian-report-actions button { flex: 1; }
  .guardian-report-grid { grid-template-columns: 1fr 1fr; }
  .guardian-report-grid div:nth-child(2) { border-right: 0; }
  .guardian-report-grid div:nth-child(-n+2) { border-bottom: 1px solid var(--science-line); }
  .guardian-report-detail { grid-template-columns: 1fr; gap: 8px; }
  .practice-resume-card { align-items: flex-start; flex-direction: column; }
  .practice-resume-card>div:last-child { width: 100%; }
  .practice-resume-card a, .practice-resume-card button { flex: 1; }
}

@media print {
  body * { visibility: hidden !important; }
  .guardian-report, .guardian-report * { visibility: visible !important; }
  .guardian-report { position: absolute; inset: 0 auto auto 0; width: 100%; margin: 0; border-top-color: #000; }
  .guardian-report-actions { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .knowledge-node, .adaptive-strip, .english-audio-tools button { transition: none; }
}