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var(--line-2);font-weight:600}.seg input:focus-visible + label{outline:2px solid var(--accent);outline-offset:1px}.check{display:flex;gap:10px;align-items:center;min-height:48px;font-size:15px;color:var(--ink);cursor:pointer}.check input{width:20px;height:20px;accent-color:var(--accent)}.presets{display:flex;flex-wrap:wrap;gap:6px}.presets .chip{padding:3px 10px;font-size:13px}.rows{display:grid;gap:8px}.row{display:grid;grid-template-columns:var(--cols);gap:8px;align-items:center}.row-head span{font-size:12.5px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.row .cell input,.row .cell select{min-height:44px !important;padding:8px 10px !important;font-size:15px !important}.row-del{width:36px;height:36px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--muted);font-size:20px;line-height:1;cursor:pointer}.row-del:hover:not(:disabled){color:var(--bad);border-color:var(--bad)}.row-del:disabled{opacity:.35;cursor:default}.add-row{justify-self:start;margin-top:4px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}.actions .primary{min-width:160px}.res-primary{display:flex;flex-direction:column;gap:4px;padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line-2)}.res-primary + .res-primary{margin-top:-4px}.res-label{font-size:13px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}.res-value{font:700 clamp(1.9rem,1.4rem + 2vw,2.7rem)/1.1 var(--f-display);letter-spacing:-0.02em;color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.res-value.long{font-size:clamp(1.35rem,1.1rem + 1vw,1.75rem);line-height:1.25}.res-value small{font-size:.5em;font-weight:600;color:var(--muted);letter-spacing:0}.res-sub{color:var(--ink-2);font-size:14.5px}.res-list{margin:0 0 16px;display:grid}.res-list>div{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:9px 0;border-bottom:1px dashed var(--line-2)}.res-list dt{color:var(--ink-2);font-size:14.5px}.res-list dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;min-width:0}.badge{display:block;margin:0 0 16px;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:500;line-height:1.45}.badge-ok{background:var(--ok-soft);color:var(--ok)}.badge-warn{background:var(--warn-soft);color:var(--warn)}.badge-bad{background:var(--bad-soft);color:var(--bad)}.badge-info{background:var(--accent-soft);color:var(--accent-ink)}.split{margin:4px 0 18px}.split-bar{display:flex;height:12px;border-radius:6px;overflow:hidden;background:var(--line);gap:2px}.split-key{list-style:none;padding:0;margin:10px 0 0;display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13.5px;color:var(--ink-2)}.split-key b{font-weight:600;color:var(--ink)}.dot{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}.seg-0{background:var(--c1)}.seg-1{background:var(--c2)}.seg-2{background:var(--c3)}.seg-3{background:var(--c4)}.seg-4{background:var(--c5)}.scale{margin:0 0 18px}.scale-track{position:relative;display:flex;height:10px;border-radius:5px;overflow:visible;gap:2px}.band{display:block;height:100%}.band:first-child{border-radius:5px 0 0 5px}.band:last-of-type{border-radius:0 5px 5px 0}.band-ok{background:var(--ok)}.band-warn{background:var(--c2)}.band-bad{background:var(--bad)}.scale-pin{position:absolute;top:-5px;width:4px;height:20px;margin-left:-2px;border-radius:2px;background:var(--ink);box-shadow:0 0 0 2px var(--surface)}.scale-labels{display:flex;margin-top:8px;font-size:12px;color:var(--muted)}.scale-labels span{text-align:center}.steps{margin:0 0 14px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:4px 16px 8px}.steps summary{cursor:pointer;padding:10px 0;font-weight:600;font-size:14.5px;color:var(--ink)}.steps .tape{counter-reset:st}.steps .tape li{display:block;padding:8px 0 8px 26px;position:relative;overflow-wrap:anywhere}.steps .tape li::before{counter-increment:st;content:counter(st);position:absolute;left:0;top:8px;color:var(--muted);font-size:12px}.steps .tape li:last-child{border-bottom:0}.steps .tape b{color:var(--accent-ink);font-weight:500}.res-note{font-size:13.5px;color:var(--muted);margin:0 0 12px}.res-empty{display:grid;place-items:center;min-height:220px;text-align:center;color:var(--muted);border:1.5px dashed var(--line-2);border-radius:12px;padding:24px}.res-empty p{margin:0;max-width:30ch}.res-error{padding:16px;border-radius:10px;background:var(--bad-soft);color:var(--bad);font-size:15px}.res-error strong{display:block;margin-bottom:4px}.copy-res{margin-left:-10px}.result-extra:empty{display:none}.extra{margin-top:28px}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);max-height:520px}.table-wrap table{width:100%;border-collapse:collapse;font-size:14.5px;font-variant-numeric:tabular-nums}.table-wrap th,.table-wrap td{padding:10px 14px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}.table-wrap thead th{position:sticky;top:0;background:var(--surface-2);font-weight:600;z-index:1}.table-wrap th:first-child{text-align:left;font-weight:500}.table-wrap tbody tr:nth-child(even){background:var(--surface)}.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:56px;align-items:start;margin-top:52px}.side{position:sticky;top:92px;border:1px solid var(--line);border-radius:var(--r-lg);padding:20px}.side-h{font:600 15px/1.3 var(--f-body);letter-spacing:0;margin-bottom:10px}.side-list{list-style:none;padding:0;margin:0 0 12px}.side-list a{display:flex;align-items:center;gap:10px;padding:8px 0;font-size:14.5px;color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--line)}.side-list a:hover{color:var(--accent-ink)}.side-list .ic{width:18px;height:18px;color:var(--accent)}.related{margin-top:52px}.cat-guide{margin-top:40px}.widget-card{padding:28px}.kc{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:28px;align-items:start}.kc-sci{grid-template-columns:minmax(0,560px) minmax(0,1fr)}.kc-screen{grid-column:1;background:var(--paper);border:1px solid var(--line-2);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:6px}.kc-mode{align-self:flex-start}.kc-mode label{padding:4px 12px;font-size:13px}.kc-input{border:0;background:transparent;color:var(--ink);text-align:right;font:500 1.35rem/1.3 var(--f-mono);padding:4px 0;width:100%;min-width:0}.kc-input:focus{outline:none}.kc-out{text-align:right;font:700 2.2rem/1.15 var(--f-display);color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere;min-height:1.2em}.kc-out.err{font:500 15px/1.4 var(--f-body);color:var(--bad)}.kc-keys{grid-column:1;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.kc-fn{grid-template-columns:repeat(5,1fr)}.k{min-height:56px;border-radius:12px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font:500 1.2rem/1 var(--f-body);cursor:pointer;transition:background .12s,transform .06s;touch-action:manipulation}.k:hover{background:var(--surface)}.k:active{transform:scale(.97)}.k-sci{min-height:46px;font-size:.98rem;background:var(--surface);color:var(--ink-2)}.k-fn{background:var(--surface-2);color:var(--ink-2)}.k-op{background:var(--accent-soft);color:var(--accent-ink);font-size:1.4rem}.k-eq{background:var(--accent);color:var(--on-accent);border-color:var(--accent);font-size:1.4rem}.k-eq:hover{background:var(--accent-ink)}.kc-hist-wrap{grid-column:2;grid-row:1 / span 3;border:1px solid var(--line);border-radius:14px;padding:16px 18px;min-height:100%}.kc-hist{list-style:none;padding:0;margin:0;font-family:var(--f-mono);font-size:14px}.kc-hist li{border-bottom:1px dashed var(--line)}.kc-hist .link{width:100%;display:flex;justify-content:space-between;gap:12px;padding:8px 0;border:0;background:none;color:var(--ink-2);font:inherit;cursor:pointer;text-align:left}.kc-hist .link span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.kc-hist .link b{color:var(--ink);font-weight:500;white-space:nowrap}.kc-hist .link:hover b{color:var(--accent-ink)}.kc-hist .muted{padding:8px 0;font-family:var(--f-body);border:0}.dir-search{max-width:460px;margin-top:18px}.dir{columns:2 380px;column-gap:40px;margin-bottom:40px}.dir-sec{break-inside:avoid;margin-bottom:34px}.dir-sec h2{font-size:1.25rem}.dir-sec h2 a{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.dir-sec h2 .ic{color:var(--accent)}.dir-sec 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a{color:var(--ink-2);text-decoration:none;font-size:15px}.site-footer ul a:hover{color:var(--accent-ink);text-decoration:underline}.foot-base{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}.foot-base p{margin:0}@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:36px;padding-block:44px 40px}.tape-card{max-width:460px;transform:none}.guide-grid,.calc-layout{grid-template-columns:1fr;gap:32px}.promise,.side{position:static}.calc-grid{grid-template-columns:1fr}.calc-out{border-left:0;border-top:1px solid var(--line)}.result{position:static}.kc,.kc-sci{grid-template-columns:1fr}.kc-hist-wrap{grid-column:1;grid-row:auto}.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1 / -1}}@media (max-width:560px){body{font-size:15.5px}.calc-in,.calc-out,.widget-card{padding:20px 16px}.fields{grid-template-columns:1fr}.field.small{grid-column:auto}.actions .btn{flex:1}.sec{padding-block:40px}.k{min-height:52px}.kc-fn{grid-template-columns:repeat(5,1fr);gap:6px}.k-sci{font-size:.88rem;min-height:42px}.foot-grid{grid-template-columns:1fr}.row{gap:6px}.row .cell input,.row .cell select{padding:8px 8px !important;font-size:14.5px !important}.seg label{padding:7px 11px;font-size:14px}.search-lg input{height:54px}.search-lg .kbd{display:none}}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important}}.field .affixed .affix.pre + input{padding-left:34px}.field .affixed:has(.suf) input{padding-right:76px}.prose .faq-q,.faq .faq-q{margin:0}.cat-all{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:12px;background:var(--accent-soft);border:1px dashed var(--accent);border-radius:var(--r-lg);padding:22px}.cat-all p{margin:0;color:var(--ink-2)}.row .cell select{padding-right:24px !important;background-position:calc(100% - 13px) 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a[aria-current]{color:var(--accent-ink)}@media (max-width:1180px){.lang>summary span{display:none}.lang>summary{padding:0;width:42px;justify-content:center}}.sysfont{--f-display:system-ui,-apple-system,"Segoe UI","Noto Sans",sans-serif;--f-body:system-ui,-apple-system,"Segoe UI","Noto Sans",sans-serif}.sysfont h1,.sysfont h2,.sysfont h3{letter-spacing:0}.sysfont .eyebrow,.sysfont .res-label,.sysfont .foot-h,.sysfont .row-head span{text-transform:none;letter-spacing:0}:lang(ar),:lang(ur){--f-display:"Segoe UI",Tahoma,"Noto Naskh Arabic","Noto Sans Arabic",system-ui,sans-serif;--f-body:"Segoe UI",Tahoma,"Noto Naskh Arabic","Noto Sans Arabic",system-ui,sans-serif}:lang(ur) body{line-height:1.9}:lang(ja) body,:lang(zh) body{line-break:strict;word-break:normal;overflow-wrap:anywhere}[dir="rtl"] .lang-menu{right:auto;left:0}[dir="rtl"] .hdr-tools{margin-left:0;margin-right:auto}[dir="rtl"] .search .s-ic{left:auto;right:12px}[dir="rtl"] .search input{padding:0 38px 0 12px}[dir="rtl"] .search-lg .s-ic{right:18px}[dir="rtl"] .search-lg input{padding-left:48px;padding-right:52px}[dir="rtl"] .search-lg .kbd{right:auto;left:14px}[dir="rtl"] .affix.pre{left:auto;right:0}[dir="rtl"] .affix.suf{right:auto;left:0}[dir="rtl"] .field .affixed .affix.pre + input{padding-left:14px;padding-right:34px}[dir="rtl"] .field .affixed:has(.suf) input{padding-right:14px;padding-left:76px}[dir="rtl"] .field select{padding-right:14px;padding-left:38px;background-position:19px 21px,14px 21px}[dir="rtl"] .row .cell select{padding-right:10px !important;padding-left:24px !important;background-position:13px 19px,8px 19px}[dir="rtl"] .calc-out{border-left:0;border-right:1px solid var(--line)}[dir="rtl"] .howto li{padding-left:0;padding-right:42px}[dir="rtl"] .howto li::before{left:auto;right:0}[dir="rtl"] .examples li{border-left:0;border-right:3px solid var(--accent);border-radius:10px 0 0 10px}[dir="rtl"] .faq summary{padding:16px 0 16px 32px}[dir="rtl"] .faq 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var(--f-body);color:var(--ink);letter-spacing:0}.fhead .help{margin:4px 0 0}.share{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin:16px 0;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.share-label{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink)}.share-label svg{width:18px;height:18px}.share-btns{display:flex;flex-wrap:wrap;gap:8px}.share-btns .btn{text-decoration:none}.share-inc{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);flex-basis:100%}.share-msg{margin:0;font-size:14px;flex-basis:100%;min-height:0}.share-msg:empty{display:none}.share-msg.ok{color:var(--ok)}.share-msg.err{color:var(--bad)}.share-msg.warn{color:var(--warn)}.share-manual{width:100%;min-height:64px;flex-basis:100%;font:400 13px/1.4 var(--f-mono,monospace);padding:8px;border:1px solid var(--line-2);border-radius:8px;background:var(--bg);color:var(--ink)}@media 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var(--f-body)}.post-d{font-size:14.5px;color:var(--ink-2)}.post-meta{font-size:13.5px;color:var(--muted);margin-top:auto;padding-top:6px}.post{max-width:760px;margin:0 auto}.post-head h1{margin-bottom:12px}.post-head .post-meta{margin:12px 0 0;padding:0}.post-cover{margin:24px 0 28px}.post-cover img{display:block;width:100%;height:auto;border-radius:var(--r);border:1px solid var(--line)}.post-body{max-width:none;font-size:1.04rem}.post-body .formula-line{padding:12px 16px;border-left:3px solid var(--accent);background:var(--surface);border-radius:0 10px 10px 0;color:var(--ink);overflow-x:auto}.post-body .note{font-size:14px;color:var(--muted)}.tbl{width:100%;border-collapse:collapse;margin:1em 0 1.2em;font-size:15px;display:block;overflow-x:auto}.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}.tbl th{font-weight:600;color:var(--ink);background:var(--surface)}.tbl td{color:var(--ink-2)}.post-cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:22px 0;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}.post-cta-b{display:flex;flex-direction:column;gap:2px;flex:1 1 220px;min-width:0}.post-cta-b b{color:var(--ink)}.post-cta-b span{font-size:14.5px;color:var(--ink-2)}.post-cta .btn{text-decoration:none}.post .disclaimer{margin-top:28px}.side-guides{margin-top:22px}.nav .nav-blog a{display:flex;align-items:center;gap:5px;color:var(--accent-ink);font-weight:600}.nav .nav-blog .ic{width:16px;height:16px}.foot-h a{color:inherit;text-decoration:none}@media (min-width:1181px){.nav .nav-blog{margin-left:4px;padding-left:6px;border-left:1px solid var(--line)}}.site-footer .foot-social{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0;padding:0}.site-footer .foot-social a{display:inline-block;padding:6px 12px;border:1px solid var(--line-2);border-radius:99px;font-size:13.5px;color:var(--ink-2);text-decoration:none}.site-footer .foot-social a:hover{text-decoration:none;border-color:var(--accent);color:var(--accent-ink)}.foot-legal{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0 0 12px !important}.foot-legal a{color:var(--ink-2);text-decoration:none}.foot-legal a:hover{color:var(--accent-ink)}.foot-grid:has(>:nth-child(4):last-child){grid-template-columns:1.3fr 1fr 1fr 1fr}.foot-grid:has(>:nth-child(3):last-child){grid-template-columns:1.3fr 1fr 1fr}.foot-grid:has(>:nth-child(2):last-child){grid-template-columns:1.3fr 1fr}.foot-grid:has(>:only-child){grid-template-columns:1fr}