.rbdh-desktop,.rbdh-desktop *{box-sizing:border-box}.rbdh-desktop{--rbdh-accent:#075985;--rbdh-accent-strong:#0c4a6e;--rbdh-border:#cbd5e1;--rbdh-muted:#475569;--rbdh-surface:#fff;--rbdh-surface-soft:#f8fafc;--rbdh-text:#172033;max-width:72rem;margin:2rem auto;padding:clamp(1.1rem, 3vw, 2.25rem);border:1px solid var(--rbdh-border);border-radius:1rem;background:var(--rbdh-surface-soft);box-shadow:0 1rem 2.5rem rgb(15 23 42 / .08);color:var(--rbdh-text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}.rbdh-desktop h2,.rbdh-desktop h3,.rbdh-desktop h4,.rbdh-desktop p{margin-top:0}.rbdh-desktop h2{margin-bottom:.55rem;font-size:clamp(1.5rem, 3vw, 2rem);line-height:1.2;letter-spacing:-.02em}.rbdh-desktop__intro,.rbdh-desktop__hint,.rbdh-result__note{color:var(--rbdh-muted)}.rbdh-desktop__intro{max-width:52rem;margin-bottom:.4rem}.rbdh-desktop__required-note{margin-bottom:1.5rem;color:var(--rbdh-muted);font-size:.82rem}.rbdh-desktop__grid,.rbdh-result__columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem}.rbdh-desktop__section{display:flex;flex-direction:column;gap:1.2rem;min-width:0;padding:clamp(1.1rem, 2.5vw, 1.5rem);border:1px solid var(--rbdh-border);border-radius:.9rem;background:var(--rbdh-surface);box-shadow:0 .4rem 1.2rem rgb(15 23 42 / .045)}.rbdh-desktop__section legend{padding:0 .4rem;color:var(--rbdh-accent-strong);font-size:1.12rem;font-weight:750}.rbdh-desktop__field{min-width:0}.rbdh-desktop__label{display:block;margin-top:0;margin-bottom:.35rem;font-weight:650;line-height:1.35}.rbdh-desktop__unit{color:var(--rbdh-muted);font-weight:450}.rbdh-desktop input[type="number"],.rbdh-desktop select{display:block;width:100%;min-height:2.75rem;padding:.62rem .75rem;border:1px solid #94a3b8;border-radius:.55rem;background:var(--rbdh-surface);color:var(--rbdh-text);font:inherit}.rbdh-desktop input[type="number"]:focus,.rbdh-desktop select:focus,.rbdh-desktop button:focus-visible,.rbdh-desktop__analysis:focus-visible{outline:3px solid rgb(2 132 199 / .35);outline-offset:2px;border-color:var(--rbdh-accent)}.rbdh-desktop__hint{display:block;margin-top:.38rem;font-size:.84rem;line-height:1.4}.rbdh-desktop__recommendation{margin:-.35rem 0 0;padding:.65rem .75rem;border-left:3px solid #38bdf8;background:#f0f9ff;color:#0c4a6e;font-size:.9rem}.rbdh-desktop__actions{display:flex;align-items:center;flex-direction:column;gap:.65rem;margin:2rem 0 0;padding:1.35rem;border:1px solid #bae6fd;border-radius:.9rem;background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%);text-align:center}.rbdh-desktop__actions p{max-width:38rem;margin:0;color:var(--rbdh-muted);font-size:.82rem}.rbdh-desktop__submit{width:min(100%, 24rem);min-height:3.25rem;padding:.78rem 1.75rem;border:2px solid var(--rbdh-accent);border-radius:.65rem;background:var(--rbdh-accent);box-shadow:0 .45rem 1rem rgb(7 89 133 / .18);color:#fff;cursor:pointer;font:inherit;font-weight:750;letter-spacing:.01em;transition:background-color 150ms ease,border-color 150ms ease,box-shadow 150ms ease,transform 150ms ease}.rbdh-desktop__submit:hover:not(:disabled){border-color:var(--rbdh-accent-strong);background:var(--rbdh-accent-strong);box-shadow:0 .6rem 1.2rem rgb(7 89 133 / .24);transform:translateY(-1px)}.rbdh-desktop__submit:disabled{cursor:wait;opacity:.7}.rbdh-desktop__status:not(:empty),.rbdh-desktop__analysis:not(:empty),.rbdh-desktop__history{margin-top:1.5rem}.rbdh-desktop__status:not(:empty){padding:.75rem 1rem;border-left:4px solid #0284c7;background:#f0f9ff}.rbdh-desktop__status[role="alert"]{border-left-color:#b91c1c;background:#fef2f2;color:#7f1d1d}.rbdh-desktop__status p:last-child,.rbdh-desktop__status ul:last-child{margin-bottom:0}.rbdh-result,.rbdh-desktop__history{padding:clamp(1rem, 3vw, 1.5rem);border:1px solid var(--rbdh-border);border-radius:.75rem;background:var(--rbdh-surface)}.rbdh-result{border-top:.4rem solid #64748b}.rbdh-result--repair{border-top-color:#15803d}.rbdh-result--replace{border-top-color:#0369a1}.rbdh-result--tie{border-top-color:#a16207}.rbdh-result__decision{max-width:52rem;font-size:clamp(1.08rem, 2vw, 1.25rem);font-weight:750;line-height:1.4}.rbdh-result__metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem;margin-top:1.15rem}.rbdh-result__metrics>div{display:flex;flex-direction:column;gap:.2rem;padding:.9rem 1rem;border:1px solid var(--rbdh-border);border-radius:.65rem;background:var(--rbdh-surface-soft)}.rbdh-result__metrics span{color:var(--rbdh-muted);font-size:.8rem}.rbdh-result__metrics strong{font-size:1.15rem;font-variant-numeric:tabular-nums}.rbdh-result__columns{margin-top:1.25rem}.rbdh-result__columns>div{padding:1.15rem;border-radius:.6rem;background:var(--rbdh-surface-soft)}.rbdh-result__columns ul{padding-left:1.25rem}.rbdh-result__formula{margin-bottom:0;padding:.7rem;border-left:3px solid var(--rbdh-accent);background:#e0f2fe;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem;overflow-wrap:anywhere}.rbdh-result__note{margin-top:1.25rem;margin-bottom:0;font-size:.88rem}.rbdh-desktop__history-heading{display:flex;align-items:center;justify-content:space-between;gap:1rem}.rbdh-desktop__history-heading h3{margin-bottom:0}.rbdh-desktop__clear{padding:0;border:0;background:#fff0;color:var(--rbdh-accent);cursor:pointer;font:inherit;text-decoration:underline;text-underline-offset:.15em}.rbdh-desktop__history-table{margin-top:1rem;overflow-x:auto;-webkit-overflow-scrolling:touch}.rbdh-desktop__history table{width:100%;min-width:44rem;border-collapse:collapse;font-size:.88rem}.rbdh-desktop__history th,.rbdh-desktop__history td{padding:.6rem;border:1px solid var(--rbdh-border);text-align:left;vertical-align:top}.rbdh-desktop__history thead th{background:#e2e8f0}.rbdh-desktop__history tbody tr:nth-child(even){background:var(--rbdh-surface-soft)}.rbdh-desktop [hidden]{display:none!important}@media (max-width:45rem){.rbdh-desktop__grid,.rbdh-result__columns,.rbdh-result__metrics{grid-template-columns:1fr}.rbdh-desktop{margin-block:1rem;border-radius:.65rem}.rbdh-desktop__history-heading{align-items:flex-start;flex-direction:column}.rbdh-desktop__actions{padding:1rem}}@media (prefers-reduced-motion:reduce){.rbdh-desktop *,.rbdh-desktop *::before,.rbdh-desktop *::after{scroll-behavior:auto!important}}@media (forced-colors:active){.rbdh-desktop__submit,.rbdh-result,.rbdh-desktop__status:not(:empty){border:2px solid CanvasText}}