.fd-app{width:min(var(--max),calc(100% - 32px));margin:0 auto 2rem;display:grid;gap:1rem;font-variant-numeric:tabular-nums}.fd-app *{box-sizing:border-box}.fd-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(280px,1fr);gap:1rem;align-items:start}.fd-app .panel-line{padding:1.2rem;min-width:0}.fd-app h2{font-size:1.2rem;line-height:1.4;margin:.25rem 0 1rem}.fd-app p,.fd-app li{line-height:1.75;color:var(--muted)}.fd-heading{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem}.fd-badge{color:var(--green);font-size:.73rem;align-self:start}.fd-app canvas{width:100%;height:auto;display:block;background:#061013;border:1px solid var(--line)}.fd-app :focus-visible{outline:2px solid var(--cyan);outline-offset:3px}.fd-help{font-size:.82rem}.fd-controls label{display:block;margin:.9rem 0 .35rem}.fd-controls label>span{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.4rem;font-size:.85rem}.fd-controls input,.fd-controls select{width:100%;min-height:44px;accent-color:var(--cyan);font:inherit}.fd-controls input[type=number],.fd-controls select{background:#0a1517;color:var(--text);border:1px solid var(--line);padding:.5rem}.fd-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem;margin-top:1rem}.fd-app button,.fd-app #fdDownload{min-height:44px;border:1px solid var(--line);background:rgba(120,246,231,.05);color:var(--text);padding:.65rem;cursor:pointer;font:inherit;font-size:.82rem}.fd-app button:hover{border-color:var(--cyan);color:var(--cyan)}.fd-app button:disabled{opacity:.4;cursor:default}.fd-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.65rem;margin:1rem 0 0}.fd-metrics div{border-top:1px solid var(--line);padding-top:.5rem;min-width:0}.fd-metrics dt{font-size:.75rem;color:var(--muted)}.fd-metrics dd{margin:.3rem 0;font-size:1.05rem;color:var(--cyan);overflow-wrap:anywhere}.fd-lower{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.fd-app pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:.8rem;color:var(--muted);max-width:100%}.fd-app summary{min-height:44px;padding:.75rem;cursor:pointer}.fd-app #fdDownload{display:inline-flex;align-items:center;margin-top:.5rem}.fd-app [hidden]{display:none!important}.fd-formula{font-family:monospace;overflow-wrap:anywhere;line-height:1.8;color:var(--cyan);font-size:.85rem}.fd-route{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;color:var(--green);font-size:.8rem}.fd-app a{overflow-wrap:anywhere}.page-fresnel-diffraction-observatory .lab-hero h1{font-size:clamp(1.9rem,4vw,3.15rem);margin-top:8px}@media(max-width:820px){.fd-layout,.fd-lower{grid-template-columns:1fr}}@media(max-width:620px){.fd-app{width:calc(100% - 22px)}.fd-app .panel-line{padding:.85rem}.fd-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.fd-app h2{font-size:1.08rem}.fd-app canvas{min-height:0}}
