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var(--line);color:var(--ink-soft);align-items:center;gap:12px;padding:12px 14px;font-size:.9rem;display:flex}.traffic-item:last-child{border-bottom:none}.traffic-item .dot{border-radius:50%;flex:none;width:14px;height:14px;box-shadow:inset 0 0 0 1px #00000014}.traffic-item .dot.red{background:#c62828}.traffic-item .dot.amber{background:#f9a825}.traffic-item .dot.green{background:#2e7d32}.traffic-item .dot.off{background:#cfd8d4}.study-callout{border-left:3px solid var(--brand);color:var(--ink-soft);margin:0;padding:0 0 0 12px;font-size:.92rem;line-height:1.5}.rule-board{border:1px solid var(--line);background:#fff;border-radius:12px;gap:0;margin:0;padding:0;list-style:none;display:grid;overflow:hidden}.rule-board-item{border-bottom:1px solid var(--line);grid-template-columns:40px 1fr;align-items:start;gap:12px;padding:14px;display:grid}.rule-board-item:last-child{border-bottom:none}.rule-board-n{font-variant-numeric:tabular-nums;color:var(--brand-dark);padding-top:2px;font-size:.82rem;font-weight:800}.rule-board-item strong{color:var(--ink);margin-bottom:4px;font-size:.98rem;display:block}.rule-board-item p{color:var(--ink-soft);margin:0;font-size:.9rem;line-height:1.45}.study-footer{border-top:1px solid var(--line);gap:10px;margin-top:4px;padding-top:8px;display:grid}.study-footer-meta{color:var(--muted);text-align:center;font-size:.88rem}@media (width<=480px){.ref-row{grid-template-columns:minmax(92px,36%) 1fr;gap:10px;padding:10px 12px}.sign-type{grid-template-columns:44px 1fr;padding:12px}}