/* Research lab shell; existing document and calculator components are preserved. */
:root{--sidebar-width:236px;--header-height:56px;--pad:28px}
html{scroll-padding-top:84px}
body{background-image:none;font-size:16px;padding-bottom:0}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:2px solid var(--gold);outline-offset:4px}.skip:focus{z-index:300}
.lab-sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);z-index:80;background:#090c10;border-right:1px solid var(--line);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.lab-brand-row{display:flex;align-items:flex-start;justify-content:space-between;padding:20px 18px 18px;border-bottom:1px solid #202630;margin:0 0 12px;position:relative}
.lab-brand{display:flex;flex-direction:column;align-items:center;gap:10px;width:100%;min-width:0}
/* Viewport the supplied transparent PNG to its alpha bounds; its pixels stay original. */
.lab-logo-crop{position:relative;display:block;width:100%;max-width:200px;aspect-ratio:5570/2274;overflow:hidden}
.lab-logo-image{position:absolute;width:104.56014363%;max-width:none;height:auto;left:-2.29802513%;top:-78.36411609%;mix-blend-mode:screen}
.lab-brand-caption{display:flex;align-items:center;justify-content:center;gap:8px;line-height:1.5;white-space:nowrap}.lab-brand-caption b{font-size:11px;letter-spacing:.1em;color:#edf1f7}.lab-brand-caption>span{font-size:9px;letter-spacing:.12em;color:#8f9db2;border-left:1px solid #3a3c3e;padding-left:8px}
.lab-navigation{padding:0 12px 20px}.lab-nav-group+.lab-nav-group{margin-top:18px}
.lab-nav-heading{margin:0 10px 6px;font-size:10px;letter-spacing:.16em;font-weight:800;color:#8c9cb3;line-height:20px}
.lab-nav-heading-link{display:flex;justify-content:space-between;align-items:center;gap:6px;min-height:24px}.lab-nav-heading-more{font-size:10px;letter-spacing:0;font-weight:500;color:#8091a9}.lab-nav-heading-link:hover,.lab-nav-heading-link:hover .lab-nav-heading-more,.lab-nav-heading-link[aria-current=page]{color:var(--gold)}
.lab-nav-link{display:flex;align-items:center;gap:10px;min-height:42px;padding:8px 11px;font-size:14px;font-weight:650;line-height:1.5;color:var(--text-2);border:1px solid transparent;border-radius:9px;transition:background .15s,color .15s,border-color .15s,box-shadow .15s}
.lab-nav-link:not([aria-current=page]):hover{background:var(--gold-soft);border-color:rgba(223,177,79,.22);color:var(--gold-focus)}
.lab-nav-link[aria-current=page]{color:var(--gold-ink);background:var(--gold-fill);border-color:#e6bf64;box-shadow:var(--gold-shadow),inset 0 1px 0 rgba(255,245,215,.3);font-weight:800}
.lab-nav-link[aria-current=page]:hover{filter:brightness(1.04)}
.lab-nav-icon{width:18px;flex:none;text-align:center;color:inherit;font-size:16px;line-height:1}
.lab-external{margin-left:auto;font-size:12px;color:var(--muted);opacity:0}.lab-nav-link:hover .lab-external,.lab-nav-link:focus-visible .lab-external{opacity:1}
.lab-nav-all{display:flex;align-items:center;justify-content:space-between;margin:5px 12px 0 40px;padding:5px 0;font-size:12px;color:var(--muted)}.lab-nav-all:hover,.lab-nav-all[aria-current=page]{color:var(--gold)}
.lab-top{position:sticky;top:0;margin-left:var(--sidebar-width);z-index:50;border-bottom:1px solid var(--line);background:rgba(12,15,19,.96);backdrop-filter:blur(12px)}
.lab-top-inner{display:flex;align-items:center;gap:18px;min-height:var(--header-height);padding:0 var(--pad)}
.lab-top-title{flex:none;color:#8e9aaf;font-size:12px;letter-spacing:.08em}.lab-top-current{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:12px;color:var(--muted);border-left:1px solid var(--line);padding-left:18px}
.lab-search-btn{margin-left:auto;display:flex;align-items:center;gap:9px;min-height:36px;color:var(--muted);font-size:12px;padding:0 10px;flex:none;border:1px solid transparent;border-radius:6px}.lab-search-btn:hover{color:var(--text);border-color:var(--line)}.lab-search-btn kbd{padding:0 5px;line-height:18px;font-size:11px;border:1px solid var(--line);border-radius:3px}
.lab-menu-toggle,.lab-menu-close{display:none}.lab-menu-shade{position:fixed;inset:0;z-index:70;background:rgba(0,0,0,.68)}
.lab-content{margin-left:var(--sidebar-width);width:calc(100% - var(--sidebar-width));min-width:0}
/* One sidebar offset, then a constant gutter. No centered fixed-width desktop wrapper. */
.lab-content>.wrap,.lab-content>.foot>.wrap{width:100%;max-width:none;margin:0;padding-inline:var(--pad)}
#main{min-height:calc(100vh - var(--header-height) - 230px);min-width:0}
.lab-hero{margin:0;padding:32px 0 28px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:11px;letter-spacing:.17em;color:var(--gold);font-weight:800;line-height:1.5;margin:0 0 9px}
.lab-hero h1{font-size:clamp(28px,2.5vw,36px);letter-spacing:-.035em;line-height:1.28;margin-bottom:12px;color:#f5f6f8}
.lab-hero .lead{max-width:960px;font-size:16px;line-height:1.75;color:var(--text-2);word-break:keep-all;overflow-wrap:anywhere}
.lab-hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{height:auto;min-height:44px;padding:10px 16px;border-radius:6px;font-size:13px;line-height:1.6}.btn-gold{background:linear-gradient(180deg,#dfb65e,#ba8b38);border-color:#d9ab4e;color:#151007;box-shadow:none}.btn-ghost{background:#141922;border-color:var(--line)}
.lab-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:20px 0 0}.lab-stats>div{display:flex;flex-direction:column;justify-content:center;min-height:78px;padding:13px 16px;background:var(--surface);border:1px solid var(--line);border-radius:7px}.lab-stats dd{margin:0;color:#f5f6f8;font-size:24px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.3;letter-spacing:-.02em}.lab-stats dt{font-size:11px;color:#9cacbf;line-height:1.6;margin-top:5px}
.lab-section{margin:28px 0 0}.lab-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:14px}.lab-section-head .eyebrow{margin-bottom:6px}.lab-section-head h2{font-size:22px;line-height:1.35}.lab-section-note{font-size:12px;color:var(--muted);padding-bottom:2px;text-align:right}
.lab-quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.lab-quick-card{min-width:0;display:flex;flex-direction:column;align-items:flex-start;padding:20px;min-height:164px;border:1px solid var(--line);border-radius:8px;background:linear-gradient(145deg,#151b23,#10151b);transition:border-color .16s,background .16s,transform .16s}.lab-quick-card:hover{border-color:#8c713f;background:#171d26;transform:translateY(-2px)}
.lab-card-label{font-size:11px;letter-spacing:.09em;color:#efbc55;font-weight:800;margin-bottom:10px}.lab-quick-card h3{font-size:19px;line-height:1.4;letter-spacing:-.025em;margin-bottom:7px}.lab-quick-card p{font-size:14px;color:var(--text-2);line-height:1.65;word-break:keep-all;overflow-wrap:anywhere}.lab-card-action{font-size:13px;color:#d4e1f1;margin-top:auto;padding-top:18px}
.lab-research-list{list-style:none;padding:0;margin:0;border:1px solid var(--line);border-radius:7px;overflow:hidden;background:var(--surface)}.lab-research-list li+li{border-top:1px solid var(--line)}.lab-research-list a{display:grid;grid-template-columns:92px minmax(0,1fr) auto 16px;gap:20px;align-items:center;min-height:50px;padding:12px 16px;transition:background .15s}.lab-research-list a:hover{background:#181e27}.lab-research-track{font-size:11px;font-weight:700;color:var(--gold)}.lab-research-title{font-size:14px;font-weight:700;line-height:1.6;overflow-wrap:anywhere}.lab-research-list time{font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted)}.lab-research-arrow{font-size:14px;color:var(--muted)}
.lab-browse-links{display:flex;gap:20px;justify-content:flex-end;flex-wrap:wrap;margin-top:12px;font-size:12px;color:var(--muted)}.lab-browse-links a:hover{color:var(--gold)}
.answers{padding-top:6px}.ans{border-radius:7px;background:var(--surface);padding:18px}.ans::before{display:none}.ans-q{font-size:16px}.ans-lines{font-size:13px}
.card,.notice,.principle,.action,.tool-input,.tool-panel{box-shadow:none}.card::before{display:none}.card:hover{border-color:var(--gold-line);box-shadow:none}
.foot{margin-top:48px;padding:28px 0;color:var(--muted)}.foot-brand{font-size:12px}.foot p,.foot-links{font-size:12px}.foot-legal{font-size:11px}
.page-head{padding-top:36px}.doc{padding-top:32px;max-width:none}.filter{top:60px}.toc{top:84px}
.tool-grid,.tool-grid>*,.doc-body-wrap,.doc-body-wrap>*,.two-col,.two-col>*,.ref-two,.ref-two>*{min-width:0}.in-row,.seg-row{min-width:0}.price input{min-width:0}
@media(min-width:1000px){.doc-body-wrap{grid-template-columns:200px minmax(0,1fr)}}
@media(min-width:1000px) and (max-width:1399px){#p-result .tool-cards{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:900px) and (max-width:1279px){.tool-grid,.tool-grid-3,.two-col,#p-ref .ref-two{grid-template-columns:minmax(0,1fr)}.seg-row-3{display:flex;flex-wrap:wrap}.doc-body-wrap{grid-template-columns:minmax(0,1fr)}.toc{position:static}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.ans-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:1099px){:root{--sidebar-width:220px;--pad:24px}.lab-top-current{display:none}.lab-section-note{display:none}.lab-quick-grid{gap:10px}.lab-quick-card{padding:17px 15px}.lab-quick-card h3{font-size:17px}.lab-research-list a{grid-template-columns:60px minmax(0,1fr) auto;gap:12px}.lab-research-arrow{display:none}}
@media(max-width:899px){:root{--sidebar-width:244px;--pad:24px}.lab-sidebar{visibility:hidden;transform:translateX(-100%);transition:transform .2s,visibility .2s}.lab-sidebar.is-open{visibility:visible;transform:translateX(0)}.lab-top,.lab-content{margin-left:0;width:100%}.lab-top-inner{gap:12px;padding:0 var(--pad)}.lab-menu-toggle,.lab-menu-close{display:grid;place-items:center;min-width:40px;min-height:44px;color:var(--text-2)}.lab-menu-toggle{margin-left:-8px}.lab-menu-close{position:absolute;right:8px;top:4px;font-size:24px;background:#11171e;border-radius:6px;min-width:32px;min-height:32px}.lab-brand-row{padding:34px 22px 18px}.lab-navigation{padding-top:0}.lab-nav-link{min-height:42px}.lab-top-title{font-size:11px;letter-spacing:.05em}.lab-hero{padding-top:28px}.lab-quick-card h3{font-size:17px}.tool-grid,.tool-grid-3{grid-template-columns:minmax(0,1fr)}.seg-row-3{display:flex;flex-wrap:wrap}.lab-research-list a{grid-template-columns:60px minmax(0,1fr) auto}}
@media(max-width:639px){:root{--pad:20px}.lab-top-title span{display:none}.lab-search-btn{padding:0 4px}.lab-search-btn kbd{display:none}.lab-hero{padding:32px 0 26px}.lab-hero h1{font-size:29px;word-break:keep-all}.lab-hero .lead{font-size:14px;line-height:1.8}.lab-hero .eyebrow{font-size:9px;letter-spacing:.12em}.lab-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:20px}.lab-stats>div{min-height:80px;padding:14px}.lab-stats dd{font-size:23px}.lab-section{margin-top:28px}.lab-section-head h2{font-size:21px}.lab-quick-grid{grid-template-columns:minmax(0,1fr)}.lab-quick-card{padding:19px;min-height:0}.lab-quick-card h3{font-size:18px}.lab-quick-card p{font-size:14px}.lab-card-action{padding-top:17px}.lab-research-list a{grid-template-columns:48px minmax(0,1fr);gap:2px 10px;padding:12px 14px}.lab-research-title{font-size:13px}.lab-research-list time{grid-column:2;font-size:10px}.lab-research-track{font-size:10px;align-self:start;padding-top:3px}.lab-browse-links{gap:14px;font-size:11px}.lab-section-head{margin-bottom:13px}.seg-row-3{display:grid;grid-template-columns:minmax(0,1fr)}.in-row .price{min-width:0}.foot-inner{gap:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.lab-sidebar,.lab-top,.lab-menu-shade{display:none}.lab-content{margin-left:0;width:100%}.lab-hero{padding-top:0}}

/* Gold is reserved for the current destination and chosen controls. */
::selection{background:rgba(223,177,79,.32);color:#fff}
.lab-nav-heading,.lab-nav-heading-more,.lab-top-title,.lab-top-current,.lab-stats dt,.lab-brand-caption>span{color:var(--muted)}
.lab-nav-heading-link[aria-current=page]{background:var(--gold-fill);color:var(--gold-ink);border-radius:6px;box-shadow:var(--gold-shadow);padding:4px 8px;margin-inline:2px;font-weight:800}
.lab-nav-heading-link[aria-current=page] .lab-nav-heading-more,.lab-nav-heading-link[aria-current=page]:hover .lab-nav-heading-more{color:var(--gold-ink)}
.lab-top{background:rgba(13,16,19,.96)}
.lab-brand-caption b{color:var(--gold-focus)}
.lab-card-label,.lab-research-track{color:var(--gold)}
.lab-card-action{color:var(--text-2)}
.lab-quick-card{background:linear-gradient(145deg,#191e22,#111619)}
.lab-quick-card:hover,.lab-quick-card:focus-visible{border-color:var(--gold);background:linear-gradient(145deg,#26231b,#171b1e);box-shadow:0 5px 20px rgba(199,148,46,.08)}
.lab-quick-card:hover h3,.lab-quick-card:hover .lab-card-action{color:var(--gold-focus)}
.lab-research-list a:hover{background:rgba(223,177,79,.07)}
.lab-research-list a:hover .lab-research-title,.lab-browse-links a:hover{color:var(--gold-focus)}
.btn-gold{background:var(--gold-fill);color:var(--gold-ink);border-color:#e6bf64;box-shadow:var(--gold-shadow);font-weight:800}
.btn-gold:hover{filter:brightness(1.05);box-shadow:0 6px 22px rgba(199,148,46,.25)}
.btn-ghost,.btn-share{background:var(--surface);border-color:var(--gold-line);color:var(--gold)}
.btn-ghost:hover,.btn-share:hover{background:var(--gold-soft);border-color:var(--gold);color:var(--gold-focus)}
.lab-content .seg-btn:not(:disabled)[aria-checked=false]:hover,.lab-content .chip[aria-pressed=false]:hover,.lab-content .class-tab[aria-selected=false]:hover{background:var(--gold-soft);border-color:var(--gold-line);color:var(--gold-focus)}
.lab-content .seg-btn[aria-checked=true]:not(:disabled),.lab-content .chip[aria-pressed=true],.lab-content .class-tab[aria-selected=true]{background:var(--gold-fill);color:var(--gold-ink);border-color:#e6bf64;box-shadow:0 2px 8px rgba(199,148,46,.15),inset 0 1px 0 rgba(255,245,215,.3);font-weight:800}
.lab-content .class-tab[aria-selected=true] span{color:var(--gold-ink)}
.lab-content .seg-btn[aria-checked=true]:not(:disabled) i{box-shadow:0 0 0 2px rgba(32,23,6,.55)}
.lab-content .seg-btn:disabled{background:var(--surface-2);border-color:var(--line);box-shadow:none}
.lab-search-btn:hover,.lab-menu-toggle:hover,.lab-menu-close:hover{background:var(--gold-soft);color:var(--gold-focus);border-color:var(--gold-line)}
.lab-nav-link:active,.btn:not(:disabled):active,.lab-content .seg-btn:not(:disabled):active{transform:translateY(1px)}
.lab-nav-link:focus-visible,.lab-nav-heading-link:focus-visible,.lab-search-btn:focus-visible,.lab-menu-toggle:focus-visible,.lab-menu-close:focus-visible,.lab-content .btn:focus-visible,.lab-content .seg-btn:focus-visible,.lab-content .chip:focus-visible,.lab-content .class-tab:focus-visible,.lab-content .btn-share:focus-visible{outline:2px solid var(--gold-focus);outline-offset:3px}
.lab-content input:focus-visible,.lab-content select:focus-visible,.lab-content table.edit input:focus-visible{outline:2px solid var(--gold-focus);outline-offset:2px;border-color:var(--gold)}
@media(prefers-reduced-motion:reduce){.lab-nav-link:active,.btn:not(:disabled):active,.lab-content .seg-btn:not(:disabled):active{transform:none}}
@media print{.btn-gold,.lab-content .seg-btn[aria-checked=true]:not(:disabled),.lab-content .chip[aria-pressed=true]{box-shadow:none}}

/* 기준표 — 이미지 카드 (홈) · 목록 카드 썸네일 */
.ref-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.ref-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:7px;overflow:hidden;transition:border-color .15s,transform .15s}
.ref-card:hover{border-color:var(--gold);transform:translateY(-2px)}
.ref-thumb{display:block;aspect-ratio:16/9;background:#0a0d12;border-bottom:1px solid var(--line);overflow:hidden}
.ref-thumb img{width:100%;height:100%;object-fit:cover;object-position:top left;display:block}
.ref-body{display:flex;flex-direction:column;gap:6px;padding:14px 16px 16px}
.ref-title{font-size:15.5px;font-weight:800;line-height:1.45;letter-spacing:-.02em;word-break:keep-all}
.ref-sub{font-size:13px;color:var(--text-2);line-height:1.6;word-break:keep-all}
.ref-meta{font-size:11.5px;font-variant-numeric:tabular-nums}
.card-thumb{display:block;margin:-18px -18px 6px;aspect-ratio:16/9;background:#0a0d12;border-bottom:1px solid var(--line);overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;object-position:top left;display:block}
@media(max-width:1099px){.ref-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:639px){.ref-grid{grid-template-columns:minmax(0,1fr);gap:10px}.ref-title{font-size:15px}}
/* 분해 효율 계산기 */
.tool-table td.ok{color:var(--green);font-weight:800}
#cap td small{display:block;font-size:10.5px;line-height:1.2}

/* Requested site wordmark; preserve the original logo container dimensions. */
.lab-logo-image{width:100%;left:0;top:0;height:100%;object-fit:contain}