#stair-room{--sr-ink:#283e43;--sr-line:#d3dfdc;--sr-accent:#ad4c39;color:var(--sr-ink);font:1rem/1.55 system-ui,sans-serif;max-width:1120px;margin:auto;padding:12px 0}#stair-room *{box-sizing:border-box}#stair-room [hidden]{display:none!important}#stair-room h2,#stair-room h3,#stair-room h4{line-height:1.25;margin:0 0 14px;color:var(--sr-ink)}#stair-room h2{font-size:clamp(1.7rem,4vw,2.6rem);max-width:24ch}#stair-room p{margin:0 0 16px}#stair-room header{margin-bottom:24px}#stair-room button,#stair-room input,#stair-room select{font:inherit}#stair-room button{cursor:pointer;border:1px solid var(--sr-line);background:#fff;color:var(--sr-ink);border-radius:12px;padding:12px 16px;min-height:44px;text-align:left}#stair-room button:disabled{opacity:.5;cursor:default}#stair-room button:focus-visible,#stair-room input:focus-visible,#stair-room select:focus-visible,#stair-room summary:focus-visible{outline:3px solid #3d809a;outline-offset:3px}#stair-room button[aria-pressed=true]{border-color:var(--sr-accent);box-shadow:inset 0 0 0 1px var(--sr-accent);background:#fff8f1}.sr-presets,.sr-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:24px}.sr-presets small,.sr-options small,.sr-options span{display:block;line-height:1.4;margin-top:8px}.sr-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 16px;margin:16px 0 24px}.sr-field{display:grid;grid-template-rows:subgrid;grid-row:span 3;gap:8px;min-width:0}.sr-field label{font-weight:650;line-height:1.35}.sr-field small{font-size:.83rem;line-height:1.4;color:#566e73}.sr-field input,.sr-field select{width:100%;min-width:0;border:1px solid #9fb5b8;border-radius:9px;background:#fff;padding:11px;min-height:48px;color:var(--sr-ink)}#stair-room details{border-top:1px solid var(--sr-line);padding-top:16px;margin:0 0 24px}#stair-room summary{cursor:pointer;font-weight:650;padding:8px 0}.sr-options{margin-top:24px}.sr-options strong{display:block}.sr-options span{font-weight:700}.sr-answer{border-left:5px solid #7d9b82;background:#f4f7ef;border-radius:0 14px 14px 0;padding:22px 24px;margin:20px 0}.sr-answer.sr-attention{border-color:#b3654e;background:#fff4ee}.sr-fit{font-size:1.15rem;font-weight:700}.sr-diagrams{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-bottom:24px}.sr-diagrams figure{margin:0;border:1px solid var(--sr-line);border-radius:16px;padding:14px;background:#fcfdfb;min-width:0}.sr-diagrams svg{display:block;width:100%;height:auto}.sr-diagrams figcaption{font-size:.85rem;line-height:1.45;margin-top:12px;color:#566e73}.sr-room{fill:#e4eff4;stroke:#4c6b7c;stroke-width:2;stroke-dasharray:5 3}.sr-flight,.sr-profile{fill:#f3e3cd;stroke:#70513b;stroke-width:1.5}.sr-landing{fill:#d1dfc9;stroke:#526344;stroke-width:1.5}.sr-step-line{stroke:#70513b;stroke-width:1;opacity:.7}.sr-direction{stroke:#923e2e;stroke-width:2;fill:none}.sr-slab{fill:#75858a;opacity:.8}.sr-clearance{stroke:#ad4c39;stroke-width:3;stroke-dasharray:4 2}.sr-point{fill:#ad4c39}.sr-diagrams svg text{fill:#283e43;font:13px system-ui,sans-serif}.sr-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:20px 0 24px}.sr-metrics div{padding:16px;background:#f3f6f5;border-radius:12px}.sr-metrics dt{font-size:.85rem}.sr-metrics dd{font-size:1.15rem;font-weight:700;margin:8px 0 0}.sr-head-answer{background:#f3f6f5;padding:20px;border-radius:12px;margin:20px 0}.sr-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}#sr-feedback{color:#486667;font-size:.9rem}#sr-error{padding:16px;border-left:4px solid #ad4c39;background:#fff4ee}#sr-copytext{width:100%;min-height:200px;padding:12px;font:inherit}.sr-boundary{font-size:.9rem;color:#566e73}.sr-ceiling-label{display:flex;gap:12px;align-items:center;margin:20px 0}#sr-ceiling{width:22px;height:22px;flex:none}.sr-notes{border-top:1px solid var(--sr-line);padding-top:24px;margin-top:28px}.sr-toolbar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center}.sr-toolbar button{margin-top:22px}
@media(max-width:840px){.sr-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.sr-diagrams{grid-template-columns:1fr}.sr-diagrams figure{max-width:600px;width:100%;margin:auto}.sr-presets,.sr-options{grid-template-columns:1fr}.sr-options{gap:8px}.sr-options button{display:grid;grid-template-columns:1fr auto;gap:4px 12px}.sr-options small{grid-column:1/-1}.sr-options span{margin-top:0}.sr-metrics{grid-template-columns:1fr}}
@media(max-width:460px){.sr-fields{grid-template-columns:1fr}.sr-toolbar{grid-template-columns:1fr}.sr-toolbar button{margin-top:0}.sr-answer{padding:18px}.sr-diagrams figure{padding:8px}.sr-options button{display:block}.sr-options span{margin-top:8px}}
#stair-room select{appearance:none;-webkit-appearance:none;min-height:48px;padding:11px 34px 11px 11px;border:1px solid #9fb5b8;border-radius:9px;background:#fff;color:var(--sr-ink);background-image:linear-gradient(45deg,transparent 50%,#486667 50%),linear-gradient(135deg,#486667 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat}.sr-toolbar>.sr-field{grid-column:1;grid-row:1/span 3}.sr-toolbar>button{grid-column:2;grid-row:2;margin:0;align-self:stretch}
@media(max-width:460px){.sr-toolbar>button{grid-column:1;grid-row:4}}
.sr-head-answer.sr-low{background:#fff4ee;border-left:4px solid #ad4c39}

#calculator-rating[hidden]{display:none!important}