:root{--bg:#07142a;--panel:#0b1d3a;--line:#1d3a66;--ink:#eaf4ff;--muted:#86a3c9;--cyan:#6fd3ff;--accent:#ff9a3c}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:14px/1.4 "IBM Plex Sans Condensed","DejaVu Sans",system-ui,sans-serif}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 18px;border-bottom:1px solid var(--line);background:linear-gradient(90deg,#0a1a33,#0c2244)}
.kicker{display:block;font-size:11px;letter-spacing:.14em;color:var(--muted)}
h1{margin:0;font-size:20px;letter-spacing:.04em}
h2{margin:0 0 8px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-weight:600}
.tabs{display:flex;gap:4px}
.tabs .tab,.list button,.btn{font:inherit;color:var(--ink);background:#0e2547;border:1px solid var(--line);border-radius:6px;padding:7px 12px;cursor:pointer;text-decoration:none;display:inline-block}
.tabs .tab.on,.list button.on{background:#14386b;border-color:var(--cyan);box-shadow:inset 0 0 0 1px var(--cyan)}
.tabs .tab:hover,.list button:hover{border-color:var(--cyan)}
.layout{display:grid;grid-template-columns:290px 1fr;height:calc(100% - 59px)}
.side{border-right:1px solid var(--line);background:var(--panel);padding:16px;overflow:auto;display:flex;flex-direction:column;gap:18px}
.list{display:flex;flex-direction:column;gap:6px}
.list button{text-align:left;display:flex;flex-direction:column;padding:8px 12px;width:100%}
.list button small{color:var(--muted);font-size:12px}
.info dl{display:grid;grid-template-columns:auto 1fr;gap:4px 10px;margin:0}
.info dt{color:var(--muted)}
.info dd{margin:0;font-family:"IBM Plex Mono","DejaVu Sans Mono",monospace;font-size:13px;color:var(--cyan)}
.info p{margin:0 0 10px;color:var(--ink);font-size:13px}
.tools{display:flex;flex-direction:column;gap:8px}
.chk{display:flex;gap:8px;align-items:center;color:var(--ink);cursor:pointer}
.help{margin:auto 0 0;color:var(--muted);font-size:12px}
.stage{position:relative;min-height:0;overflow:auto;padding:16px;background:
  linear-gradient(180deg,rgba(13,40,80,.25),transparent 120px),
  repeating-linear-gradient(0deg,transparent,transparent 23px,rgba(29,58,102,.18) 24px),
  repeating-linear-gradient(90deg,transparent,transparent 23px,rgba(29,58,102,.18) 24px),
  #07142a}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;min-height:100%}
.col{display:flex;flex-direction:column;gap:10px;min-width:0}
.colhead{display:flex;flex-direction:column;gap:2px}
.badge{display:inline-block;align-self:flex-start;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:4px 9px;border-radius:4px;border:1px solid var(--line);background:#0e2547}
.badge.from-plan{color:var(--cyan);border-color:#2a5f9a}
.badge.from-3d{color:var(--accent);border-color:#5a3a1c}
.sub{color:var(--muted);font-size:12px}
.frame{margin:0;background:#0a1a33;border:1px solid var(--line);border-radius:8px;overflow:hidden;aspect-ratio:1/1;display:grid;place-items:center}
.frame img{width:100%;height:100%;object-fit:contain;cursor:zoom-in;background:#c8c8c8}
.source{margin:0;display:grid;grid-template-columns:1fr;gap:6px}
.source[hidden],body.hide-sources .source{display:none}
.source figcaption{color:var(--muted);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.source img{width:100%;max-height:160px;object-fit:contain;background:#0a1a33;border:1px dashed var(--line);border-radius:6px;padding:6px;cursor:zoom-in}
.grid{display:flex;flex-direction:column;gap:28px}
.grid-block h3{margin:0 0 10px;font-size:15px;letter-spacing:.06em}
.grid-block .pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid-block .pair .frame{aspect-ratio:1/1}
.lightbox{border:1px solid var(--line);background:#07142a;color:var(--ink);padding:16px;max-width:min(96vw,1100px);border-radius:10px}
.lightbox::backdrop{background:rgba(3,10,22,.78)}
.lightbox img{max-width:100%;max-height:80vh;display:block;margin:0 auto;background:#c8c8c8}
.lightbox .close{position:absolute;top:8px;right:10px;background:#0e2547;border:1px solid var(--line);color:var(--ink);border-radius:6px;padding:4px 10px;cursor:pointer}
.lightbox p{margin:10px 0 0;color:var(--muted);text-align:center;font-size:13px}
@media (max-width:980px){
  .layout{grid-template-columns:1fr;grid-template-rows:auto 1fr;height:auto;min-height:calc(100% - 59px)}
  .side{border-right:0;border-bottom:1px solid var(--line)}
  .compare,.grid-block .pair{grid-template-columns:1fr}
  .top{flex-wrap:wrap}
}