/* research.css — layout for the lab's research pages (one column: question → numbers → charts → table → source).
   Loaded after ui.css. Single dark look, same black + bronze world as the rest of the site.
   Series colors were validated for the #050505 surface (all pairs, CVD ΔE ≥ 10) on the first net-buying page. */
:root{color-scheme:dark;--grid:#191919;--s-1:#C2873F;--s-2:#d55181;--s-3:#3987e5;--s-ind:var(--s-1);--s-ins:var(--s-2);--s-for:var(--s-3);--mute:var(--mut)}
html[lang=ko] body{word-break:keep-all;overflow-wrap:break-word}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px 72px}
@media(max-width:560px){.wrap{padding:0 16px 56px}}
.brand .mark{color:#120e09}
main{display:grid;gap:48px;padding-top:28px}
main>header{max-width:760px}
h1{font-size:clamp(28px,4.6vw,42px);line-height:1.15;letter-spacing:-.03em;margin:0 0 12px;font-weight:700;text-wrap:balance}
h2{font-size:19px;margin:0 0 6px;letter-spacing:-.015em;font-weight:650;text-wrap:balance}
.lede{color:var(--ink-2);max-width:64ch;margin:0;font-size:16px}
.sub{color:var(--mut);font-size:14px;margin:0 0 14px;max-width:72ch}
.kicker{color:var(--bronze-hi);font-weight:600;font-size:13.5px;margin-bottom:8px}
.meta{margin-top:14px;font-size:13px;color:var(--dim)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
.stat{background:var(--surface);padding:16px 18px;display:grid;gap:2px;align-content:start}
.stat .v{font-size:26px;font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .l{font-size:13px;color:var(--ink-2)}
.stat .n{font-size:12.5px;color:var(--mut)}
.chart{position:relative;min-width:0}
.chart svg{display:block;width:100%;height:auto;overflow:visible}
.chart text{fill:var(--mut);font:12px var(--font);font-variant-numeric:tabular-nums}
.chart .lab{fill:var(--ink-2);font-weight:500}
.chart .note-t{fill:var(--dim);font-size:11.5px}
.tip{position:absolute;pointer-events:none;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:13px;line-height:1.5;min-width:160px;font-variant-numeric:tabular-nums;box-shadow:0 6px 20px rgba(0,0,0,.45);z-index:2}
.tip b{display:block;font-weight:600;margin-bottom:2px}
.tip .r{display:flex;justify-content:space-between;gap:14px;color:var(--ink-2)}
.tip .sw{display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:6px;vertical-align:1px}
.legend{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13.5px;color:var(--ink-2);margin:0 0 10px}
.legend span::before{content:"";display:inline-block;width:14px;height:3px;border-radius:2px;background:var(--c);margin-right:7px;vertical-align:4px}
.live{font-size:13px;color:var(--ink-2);min-height:1.6em;margin-top:6px;font-variant-numeric:tabular-nums}
.read{border-left:2px solid var(--bronze-line);padding:2px 0 2px 14px;margin:14px 0 0;color:var(--ink-2);font-size:14.5px;max-width:72ch}
.read b{color:var(--ink)}
details{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface)}
summary{cursor:pointer;padding:12px 16px;font-weight:600}
summary:focus-visible,.chart svg:focus-visible{outline:2px solid var(--bronze);outline-offset:3px;border-radius:6px}
.tbl{overflow-x:auto;padding:0 16px 14px}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;font-size:14px}
th,td{padding:7px 10px;text-align:right;border-bottom:1px solid var(--grid);white-space:nowrap}
th:first-child,td:first-child{text-align:left}
th{color:var(--mut);font-weight:500}
td.neg{color:var(--ink-2)}
.note{display:grid;gap:10px;color:var(--ink-2);font-size:14px;max-width:72ch}
.note p{margin:0}
.note b{color:var(--ink)}
.note code{overflow-wrap:anywhere;word-break:break-all}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.checks li{display:flex;gap:8px;align-items:baseline}
.checks li::before{content:"✓";color:var(--good);font-weight:700;flex:none}
.checks li.fail::before{content:"✗";color:var(--bad)}
.tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.btn.sm{padding:7px 12px;font-size:13.5px}
.limits{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);padding:16px 18px;display:grid;gap:8px;max-width:760px}
.limits h2{font-size:16px;margin:0}
.limits ul{margin:0;padding-left:18px;color:var(--ink-2);font-size:14px;display:grid;gap:6px}
.next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
@media(max-width:760px){.next{grid-template-columns:1fr}}
.next a{display:block;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);padding:16px 18px;color:var(--ink);transition:border-color .15s,background .15s}
.next a:hover{border-color:var(--bronze-line);background:var(--surface-2);text-decoration:none}
.next .k{font-size:12.5px;color:var(--bronze-hi);font-weight:600}
.next .t{font-size:16px;font-weight:650;margin-top:2px}
.next .d{font-size:13.5px;color:var(--mut);margin-top:4px}