.fit-tool{color-scheme:light;--ink:#352b29;--muted:#675c55;--line:#e3d9cb;--paper:#f7f2ea;--accent:#854b3b;--warm:#eee0ce}.fit-tool *{box-sizing:border-box}.fit-tool{margin-left:auto;margin-right:auto;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.fit-tool a{color:#6b392e;text-underline-offset:4px}.fit-tool a:focus-visible,.fit-tool button:focus-visible,.fit-tool input:focus-visible,.fit-tool select:focus-visible,.fit-tool textarea:focus-visible{outline:3px solid #bd7659;outline-offset:3px}.fit-tool h1,.fit-tool h2,.fit-tool h3{line-height:1.16;letter-spacing:-.035em}.fit-tool h1{font-size:clamp(36px,5.7vw,66px);max-width:820px;margin:12px 0 20px}.fit-tool h2{font-size:clamp(25px,3vw,34px);margin:0 0 16px}.fit-tool h3{font-size:19px;margin:0 0 9px}.fit-tool .eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:700}.fit-tool .intro{max-width:760px;color:var(--muted);font-size:19px;margin:0 0 34px}.fit-tool .layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,.8fr);gap:24px;align-items:start}.fit-tool .panel{background:#fffdfa;border:1px solid var(--line);border-radius:12px;padding:clamp(20px,3vw,32px)}.fit-tool .panel+section{margin-top:22px}.fit-tool form fieldset{margin:0 0 20px;padding:0;border:0}.fit-tool legend{font-weight:700;margin-bottom:10px}.fit-tool label{display:block;font-weight:600;font-size:14px}.fit-tool input,.fit-tool select,.fit-tool textarea,.fit-tool button{font:inherit}.fit-tool input,.fit-tool select,.fit-tool textarea{display:block;width:100%;min-width:0;border:1px solid #b7a99a;border-radius:6px;background:white;padding:10px;margin-top:5px;color:var(--ink)}.fit-tool .unit{max-width:170px;margin-bottom:22px}.fit-tool .dimensions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.fit-tool .help{color:var(--muted);font-size:14px;margin:7px 0 0}.fit-tool .gap{max-width:240px}.fit-tool .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.fit-tool button,.fit-tool .button{border:1px solid var(--accent);border-radius:6px;padding:10px 17px;background:var(--accent);color:white;font-weight:650;cursor:pointer;text-decoration:none}.fit-tool .secondary{background:transparent;color:var(--accent)}.fit-tool #result{margin-top:22px;padding:18px;background:#f4ece2;border-radius:8px}.fit-tool #result h2{font-size:22px}.fit-tool #result p:last-child{margin-bottom:0}.fit-tool .aside p,.fit-tool .aside li{color:var(--muted)}.fit-tool .aside ol{padding-left:22px}.fit-tool .aside li{padding-bottom:8px}.fit-tool .note{padding:16px 18px;border-left:3px solid #be8d6f;background:var(--warm);margin:24px 0}.fit-tool .guide{margin-top:48px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.fit-tool .guide article{border-top:2px solid #c7a58c;padding-top:18px}.fit-tool .guide p{color:var(--muted)}@media(max-width:720px){.fit-tool .layout,.fit-tool .guide{grid-template-columns:1fr}.fit-tool .guide{gap:12px;margin-top:36px}.fit-tool .dimensions{gap:8px}}@media(max-width:360px){.fit-tool .dimensions{grid-template-columns:1fr}}