:root{color-scheme:dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#17191D;color:#FFFFFF;font-synthesis:none}*{box-sizing:border-box}body{margin:0}main{max-width:700px;margin:auto;padding:32px 20px 24px}.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:850;letter-spacing:2px}.mark{display:grid;place-items:center;background:#2E6F91;color:#FFFFFF;width:32px;height:32px;border-radius:8px;letter-spacing:-2px}.tag{margin-left:auto;font-size:10px;letter-spacing:1.4px;color:#B5BCC5}h1{font-size:clamp(28px,6vw,40px);letter-spacing:-1.5px;margin:30px 0 8px;line-height:1.1}.intro{color:#B5BCC5;margin:0 0 25px}nav{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;background:#292B30;padding:5px;border:1px solid #454A52;border-radius:13px;margin-bottom:16px}button,input,select{font:inherit}button{cursor:pointer;min-height:44px;border:0;border-radius:8px;background:transparent;color:#B5BCC5}nav button{font-size:13px;font-weight:650;padding:8px 4px}nav button[aria-pressed=true]{background:#2E6F91;color:#FFFFFF}button:hover{background:#353A42}nav button[aria-pressed=true]:hover{background:#367FA5}:focus-visible{outline:3px solid #2E6F91;outline-offset:3px}.panel{background:#292B30;border:1px solid #454A52;border-radius:18px;padding:24px}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}h2{margin:0;font-size:19px}.text-button{font-size:13px;color:#FFFFFF;padding:0 12px}.fields{display:grid;grid-template-columns:minmax(0,1fr) 115px;gap:12px}label{display:block;font-size:12px;color:#B5BCC5;margin-bottom:8px}input,select{width:100%;min-height:56px;border:1px solid #606975;border-radius:9px;background:#17191D;color:#FFFFFF;padding:12px;font-size:21px}select{font-size:17px}input::placeholder{font-size:16px;color:#B5BCC5}.hint,#precision{color:#B5BCC5;font-size:12px;line-height:1.6;margin:10px 0}.error{font-size:13px;color:#ffb3a6;margin:8px 0}.error:empty{display:none}.result{margin-top:20px;background:#292B30;border:1px solid #2E6F91;border-radius:12px;padding:20px;overflow-wrap:anywhere}.eyebrow{font-size:10px;color:#B5BCC5;font-weight:700;letter-spacing:1.6px}.result output{font-size:clamp(30px,7vw,44px);font-weight:650;letter-spacing:-1px;line-height:1.5;font-variant-numeric:tabular-nums}#result-unit{color:#FFFFFF;font-size:21px}#precision{margin:3px 0 0;font-size:11px}.swap{margin-top:12px;width:100%;border:1px solid #606975;font-size:18px}.swap span{font-size:13px;margin-left:5px}.wrench{border-top:1px solid #454A52;margin-top:24px;padding-top:22px}h3{margin:0;font-size:15px}.sizes{display:flex;flex-wrap:wrap;gap:7px;margin:14px 0}.sizes button{background:#292B30;border:1px solid #606975;font-size:13px;padding:8px 12px;color:#FFFFFF}.sizes button:hover{background:#353A42}#nearest{font-size:14px;line-height:1.6;color:#FFFFFF}.caveat{color:#B5BCC5;font-size:12px;line-height:1.7;margin-bottom:0}.caveat strong{color:#FFFFFF}footer{display:flex;justify-content:center;align-items:center;gap:7px;font-size:11px;color:#B5BCC5;margin-top:20px}.dot{width:6px;height:6px;border-radius:50%;background:#2E6F91}[hidden]{display:none!important}@media(max-width:380px){main{padding:20px 12px}.panel{padding:16px}.tag{font-size:8px;letter-spacing:.5px}nav button{font-size:11px}.fields{grid-template-columns:minmax(0,1fr) 100px}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s}}