.stereo-guide h1 { font-size: clamp(2.2rem, 4.6vw, 3.65rem); line-height: 1.08; }
.stereo-guide .article-answer { margin-top: 1.4rem; }
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 1.7rem 0; }
.case-card { border: 1px solid var(--line); background: var(--panel); border-radius: 16px; padding: 22px 18px; min-width: 0; }
.case-card .case-label { margin: 0 0 14px; font-size: .76rem; color: var(--muted); }
.case-card h3 { font-size: 1.65rem; margin: 0; color: var(--ink); }
.case-card .case-count { font-size: 3rem; line-height: 1.15; font-weight: 750; color: var(--accent); margin: 20px 0 12px; font-variant-numeric: tabular-nums; }
.case-count span { display: block; font-size: .85rem; font-weight: 500; margin-top: .35rem; }
.case-card p { font-size: .94rem; }
.case-card .case-rms { margin-bottom: 0; font-size: .8rem; font-variant-numeric: tabular-nums; }
.cancellation { border-color: #caab73; }
.cancellation .case-count { color: #edcb8a; }
.sum-formula { padding: 24px; border-left: 3px solid var(--accent); background: var(--panel); font-size: clamp(1.1rem, 3vw, 1.55rem); font-variant-numeric: tabular-nums; color: var(--ink); }
.diagnostic-note { border: 1px solid #caab73; background: var(--panel); border-radius: 12px; padding: 22px; line-height: 1.65; color: var(--ink); }
.stereo-guide code { overflow-wrap: anywhere; }
.stereo-guide a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 3px; }
.skip-article { position: absolute; left: 16px; top: -100px; z-index: 100; padding: 12px 18px; background: var(--panel); color: var(--ink); }
.skip-article:focus { top: 12px; }
@media (max-width: 620px) {
  .case-grid { grid-template-columns: 1fr; }
  .case-card { padding: 20px; }
  .case-card .case-count { font-size: 2.5rem; }
  .stereo-guide h1 { font-size: 2.2rem; }
}
@media (prefers-reduced-motion: reduce) {
  .stereo-guide *, .stereo-guide *::before, .stereo-guide *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}