/* tool.gd unified unit converter v4 — scoped to #uc4 */
#uc4{--uc4-h:340px;font-size:16px}
#uc4 *,#uc4 *::before,#uc4 *::after{box-sizing:border-box}
#uc4 [hidden]{display:none!important}
.uc4-row{display:grid;grid-template-columns:minmax(150px,210px) minmax(0,1fr);gap:12px 14px;align-items:end;max-width:840px}
.uc4-lb{display:block;font-size:14px;font-weight:600;color:var(--text-2);margin:0 0 6px}
#uc4-v{font:16px/1.4 var(--mono);min-height:46px;padding:10px 14px}
.uc4-combo{position:relative;min-width:0}
#uc4-q{display:block;width:100%;min-height:46px;font-size:16px;padding:10px 118px 10px 14px;cursor:pointer;text-overflow:ellipsis}
.uc4-open #uc4-q{cursor:text;padding-right:44px;border-color:var(--brand);box-shadow:var(--ring)}
#uc4-tag{position:absolute;right:42px;top:50%;transform:translateY(-50%);max-width:34%;font-size:13px;line-height:1.5;padding:1px 9px;border-radius:999px;background:var(--brand-soft);color:var(--link);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;pointer-events:none}
.uc4-open #uc4-tag{display:none}
#uc4-chev{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:34px;height:34px;min-height:0;margin:0;padding:0;border:0;border-radius:8px;background:transparent;color:var(--muted);font-size:14px;line-height:34px;text-align:center;cursor:pointer;box-shadow:none}
#uc4-chev:hover{background:var(--surface-3)}
.uc4-open #uc4-chev{transform:translateY(-50%) rotate(180deg)}
#uc4-pop{position:absolute;left:0;top:calc(100% + 6px);z-index:60;width:min(660px,100%);min-width:100%;background:var(--surface);color:var(--text);border:1px solid var(--line-2);border-radius:12px;box-shadow:var(--sh-3);overflow:hidden}
.uc4-cols{display:grid;grid-template-columns:172px minmax(0,1fr);height:var(--uc4-h)}
#uc4-cats,#uc4-units{list-style:none;margin:0;padding:6px;overflow-y:auto;overscroll-behavior:contain;min-width:0}
#uc4-cats{background:var(--surface-2);border-right:1px solid var(--line)}
#uc4-cats li,#uc4-units li{margin:0 0 2px;border-radius:8px;cursor:pointer;line-height:1.35;font-size:15px;-webkit-tap-highlight-color:transparent}
#uc4-cats li{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:9px 10px;color:var(--text-2)}
#uc4-cats li span{min-width:0;overflow-wrap:normal;word-break:normal}
#uc4-cats li:hover{background:var(--surface-3)}
#uc4-cats li[aria-selected=true]{background:var(--surface);color:var(--link);font-weight:650;box-shadow:inset 3px 0 0 var(--brand),var(--sh-1)}
#uc4-cats li[data-cur] span::after{content:'';display:inline-block;width:6px;height:6px;margin-left:6px;border-radius:50%;background:var(--brand);vertical-align:middle}
#uc4-cats em{flex:0 0 auto;font-style:normal;font-size:12px;min-width:20px;text-align:center;padding:0 5px;border-radius:999px;background:var(--surface-3);color:var(--muted)}
#uc4-units li{display:flex;align-items:baseline;gap:10px;padding:9px 10px;color:var(--text)}
#uc4-units li b{flex:0 0 auto;min-width:58px;font-family:var(--mono);font-weight:650;font-size:15px}
#uc4-units li span{min-width:0;color:var(--muted);overflow-wrap:anywhere}
#uc4-units li[aria-selected=true]{background:var(--brand-soft)}
#uc4-units li[aria-selected=true] span{color:var(--text-2)}
#uc4-units li[data-cur]::after{content:'✓';margin-left:auto;padding-left:6px;color:var(--link);font-weight:700}
#uc4-units .uc4-none{cursor:default;color:var(--muted);display:block;padding:14px 10px}
.uc4-foot{margin:0;padding:8px 12px;border-top:1px solid var(--line);font-size:13px;color:var(--faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#uc4 .uc4-title{font-size:17px;margin:22px 0 8px;padding:0;border:0}
.uc4-note{margin:-2px 0 10px;font-size:14px;color:var(--muted)}
#uc4-tb{width:100%;max-width:840px;border-collapse:collapse;font-size:15px;border-radius:var(--r-1);overflow:hidden}
#uc4-tb td{padding:9px 12px;text-align:left;vertical-align:baseline;border-top:1px solid var(--line)}
#uc4-tb tr:first-child td{border-top:0}
#uc4-tb tr[data-v]{cursor:copy;transition:background-color .12s}
#uc4-tb tr[data-v]:nth-child(even){background:var(--surface-2)}
#uc4-tb tr[data-v]:hover{background:var(--brand-soft)}
#uc4-tb tr[data-v]:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
#uc4-tb .uc4-n{width:46%;color:var(--text-2)}
#uc4-tb .uc4-r b{font-family:var(--mono);font-weight:650;color:var(--text);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
#uc4-tb .uc4-sy{color:var(--muted);font-size:14px}
#uc4-tb .uc4-n .uc4-sy{margin-left:2px}
#uc4-tb tr.uc4-src{background:var(--brand-soft)!important;box-shadow:inset 3px 0 0 var(--brand)}
#uc4-tb tr.uc4-src .uc4-n{color:var(--text);font-weight:650}
#uc4-tb tr.uc4-src b{color:var(--link)}
#uc4-tb tr.uc4-sep td{background:transparent;padding:14px 12px 6px;font-size:13px;font-weight:600;color:var(--faint);border-top:0}
#uc4-tb .uc4-ok{margin-left:8px;font-size:13px;color:var(--ok);font-weight:600}
#uc4-tb tr.uc4-copied{background:var(--brand-soft-2)!important}
#uc4-tb .uc4-err{color:var(--err);padding:12px}
.uc4-acts{max-width:840px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;margin-top:12px}
.uc4-acts p{margin:0;font-size:14px;color:var(--muted)}
.uc4-acts button{margin:0}
#uc4-msg{color:var(--err)}
@media(max-width:640px){
 .uc4-row{grid-template-columns:minmax(0,1fr);gap:12px}
 #uc4-pop{width:100%}
 .uc4-cols{grid-template-columns:minmax(112px,38%) minmax(0,1fr)}
 #uc4-cats,#uc4-units{padding:4px}
 #uc4-cats li{flex-wrap:wrap;gap:2px 4px;padding:10px 6px 10px 8px}
 #uc4-cats em{font-size:11px;min-width:18px;padding:0 4px}
 #uc4-units li{flex-wrap:wrap;gap:2px 8px;padding:9px 8px}
 #uc4-units li b{min-width:0}
 #uc4-units li span{flex:1 1 100%;font-size:14px}
 #uc4-units li[data-cur]::after{position:absolute;right:10px}
 #uc4-units li{position:relative;padding-right:24px}
 .uc4-foot{font-size:12px;padding:7px 10px}
 #uc4-tb td{padding:9px 8px}
 #uc4-tb .uc4-n{width:44%}
 #uc4-tb .uc4-n .uc4-sy{display:none}
}
#uc4-tb tr.uc4-tgt{background:var(--brand-soft)!important;box-shadow:inset 3px 0 0 var(--brand),inset 0 0 0 1.5px var(--brand)}
#uc4-tb tr.uc4-tgt .uc4-n{color:var(--text);font-weight:650}
#uc4-tb tr.uc4-tgt b{color:var(--link)}
#uc4-tb tr.uc4-more td{padding:10px 12px;text-align:center;border-top:0}
.uc4-allb{font:inherit;font-size:13px;color:var(--link);background:transparent;border:1px solid var(--line);border-radius:8px;padding:6px 14px;cursor:pointer}
.uc4-allb:hover{background:var(--brand-soft)}
#uc4-tb tr.uc4-xsep .uc4-allb{margin-left:8px;padding:2px 10px;font-size:12px}
#uc4-units li.uc4-grp{list-style:none;padding:10px 12px 4px;font-size:12px;font-weight:600;color:var(--faint);cursor:default;pointer-events:none}

/* t251 sections & sources */
.uc4-unote{margin-top:-4px}.uc4-unote .uc4-un{display:block}.uc4-unote a{color:inherit;text-decoration:underline;text-underline-offset:2px}
#uc4-tb .uc4-rl{margin-left:6px;font-size:12px;color:var(--muted);text-decoration:underline;text-underline-offset:2px;white-space:nowrap}
#uc4-tb span.uc4-rl{text-decoration:none;border-bottom:1px dotted currentColor;cursor:help}
#uc4-tb .uc4-ap{color:var(--muted)}
#uc4-tb tr.uc4-sep .uc4-secd{display:block;margin-top:2px;font-weight:400;font-size:12px;color:var(--muted)}
#uc4-units li .uc4-gb{margin-left:6px;padding:0 5px;border-radius:4px;font-style:normal;font-size:11px;line-height:16px;color:var(--muted);border:1px solid var(--line,rgba(127,127,127,.35));white-space:nowrap;flex:none}
#uc4-units li b{flex:0 1 auto;max-width:58%;overflow-wrap:anywhere}#uc4-units li span{flex:1 1 auto}