/* Prereasoner — FormFacade-derived design system (shared by index + dimension) */
:root{
  --brand:#3f1aca; --brand-deep:#2d128d; --accent:#f47b25;
  --grad:linear-gradient(135deg,#9683f5 0%,#8170ee 55%,#6f57e8 100%);
  --ink:#fff; --ink-dim:rgba(255,255,255,.80); --ink-faint:rgba(255,255,255,.50);
  --card-ink:#1e1340; --card-ink-dim:#5b4a8f; --card-line:rgba(63,26,202,.10);
  --disp:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--disp);background:var(--grad);color:var(--ink);min-height:100vh;-webkit-font-smoothing:antialiased}
.screen{position:fixed;inset:0;display:flex;flex-direction:column;overflow:hidden}
/* header */
.hdr{flex:0 0 64px;display:flex;align-items:center;padding:0 36px;z-index:6}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff}
.brand:hover{opacity:.92}
.brand .logo{height:32px;width:auto;display:block}
.brand span{font-size:22px;font-weight:600;letter-spacing:-.4px;color:#fff}  /* FormFacade wordmark: Inter semibold */
.spacer{flex:1}
.ghost{all:unset;cursor:pointer;padding:9px 22px;font-size:12px;font-weight:600;letter-spacing:1.6px;text-transform:uppercase;color:#fff;border:1.5px solid rgba(255,255,255,.85);border-radius:9999px;transition:background .16s}
.ghost:hover{background:rgba(255,255,255,.12)}
/* input screen */
.center{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;padding:0 40px 40px;text-align:center;min-height:0}
.h1{font-size:clamp(38px,5vw,72px);font-weight:300;line-height:1.05;letter-spacing:-1.6px;max-width:920px;text-wrap:balance}
.sub{font-size:18px;color:var(--ink-dim);max-width:560px;line-height:1.5}
.promptcard{width:min(660px,100%);background:#fff;border-radius:12px;box-shadow:0 12px 36px rgba(40,12,140,.20)}
.promptcard textarea{width:100%;border:none;outline:none;padding:20px 22px;background:transparent;color:var(--card-ink);font-family:var(--mono);font-size:14px;line-height:1.55;resize:vertical;min-height:120px;border-radius:12px}
.cta{all:unset;cursor:pointer;margin-top:6px;padding:18px 50px;background:var(--brand);color:#fff;font-size:13px;font-weight:700;letter-spacing:2.4px;text-transform:uppercase;border-radius:9999px;box-shadow:0 10px 28px rgba(40,12,140,.35),inset 0 -2px 0 rgba(0,0,0,.12);display:inline-flex;align-items:center;gap:12px;transition:transform .18s,box-shadow .18s}
.cta:hover{transform:translateY(-1px);box-shadow:0 14px 34px rgba(40,12,140,.42),inset 0 -2px 0 rgba(0,0,0,.12)}
.cta[disabled]{opacity:.55;cursor:default;transform:none}
.err{color:#ffd9d0;font-family:var(--mono);font-size:12.5px;min-height:16px}
/* prompt + CSV attachment (Claude-style chip) */
.promptcard .qbox{width:100%;border:none;outline:none;padding:18px 20px 8px;background:transparent;color:var(--card-ink);font-family:var(--disp);font-size:16px;line-height:1.5;resize:none;min-height:58px;border-radius:12px 12px 0 0}
.attachbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 14px 14px;border-top:1px solid #efeafa}
.attachbtn{all:unset;cursor:pointer;display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border:1.5px dashed #c9bff0;border-radius:9999px;color:var(--brand);font-size:12.5px;font-weight:600;font-family:var(--disp)}
.attachbtn:hover{background:#f3effd;border-style:solid}
.attachbtn svg{width:15px;height:15px}
.chip{display:inline-flex;align-items:center;gap:9px;padding:8px 10px 8px 12px;background:#f3effd;border:1px solid #ddd4f5;border-radius:10px;color:var(--card-ink);font-family:var(--mono);font-size:12px;max-width:100%}
.chip .ic{width:26px;height:26px;border-radius:6px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;flex:0 0 auto}
.chip .meta{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.chip .nm{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:240px}
.chip .sz{color:var(--card-ink-dim);font-size:10.5px}
.chip .x{all:unset;cursor:pointer;color:var(--card-ink-dim);font-size:16px;padding:0 4px;line-height:1}
.chip .x:hover{color:#d33}
.promptcard.drag{outline:2px dashed var(--brand);outline-offset:3px}
.hint{font-size:12px;color:var(--ink-faint);font-family:var(--mono);align-self:flex-start}
/* upload widget (CSV drop-zone) */
.dropzone{width:min(560px,100%);background:#fff;border-radius:16px;border:2px dashed #cfc4f3;cursor:pointer;
  padding:40px 28px;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;
  box-shadow:0 12px 36px rgba(40,12,140,.18);transition:border-color .16s,background .16s,transform .16s}
.dropzone:hover{border-color:var(--brand);background:#faf9ff}
.dropzone.drag{border-color:var(--brand);border-style:solid;background:#f3effd;transform:translateY(-2px)}
.dropzone .upic{width:54px;height:54px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff}
.dropzone .upic svg{width:26px;height:26px}
.dz-title{font-size:18px;font-weight:600;color:var(--card-ink)}
.dz-sub{font-size:13px;color:var(--card-ink-dim);font-family:var(--mono)}
.dz-browse{color:var(--brand);font-weight:600;text-decoration:underline}
.filecard{width:min(560px,100%);background:#fff;border-radius:16px;box-shadow:0 12px 36px rgba(40,12,140,.18);padding:16px;display:flex;align-items:center;gap:13px}
.filecard .ic{width:42px;height:42px;border-radius:9px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;flex:0 0 auto}
.filecard .meta{flex:1;min-width:0}.filecard .nm{font-family:var(--mono);font-size:13.5px;font-weight:600;color:var(--card-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.filecard .sz{font-family:var(--mono);font-size:11.5px;color:var(--card-ink-dim);margin-top:2px}
.filecard .x{all:unset;cursor:pointer;color:var(--card-ink-dim);font-size:18px;padding:0 6px}.filecard .x:hover{color:#d33}
/* landing — responsive two-column hero (formfacade.com-style) */
.page{min-height:100vh;display:flex;flex-direction:column}
.hero{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:24px 40px 56px;display:flex;align-items:center;gap:56px}
.hero-left{flex:1.1 1 0;max-width:640px;display:flex;flex-direction:column;align-items:flex-start;gap:24px}
/* match formfacade.com hero headline: Inter 500 (medium), ~44px, -1px tracking */
.hero-left .h1{font-size:clamp(32px,3.4vw,44px);font-weight:500;line-height:1.3;letter-spacing:-1px;text-align:left;text-wrap:normal}
.hero-left .promptcard{width:100%}
.hero-left .err{align-self:stretch;text-align:left}
.hero-right{flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0}
.papers{width:100%;max-width:460px;aspect-ratio:440/560;border:0;display:block}
@media(max-width:880px){
  .hero{flex-direction:column;gap:30px;padding:12px 24px 40px;align-items:center}
  .hero-left{max-width:560px;align-items:center}
  .hero-left .h1{text-align:center}
  .papers{max-width:300px}
}
/* analysis screen */
.stage{flex:0 0 auto;padding:14px 36px 4px;text-align:center}
.badge{font-family:var(--mono);font-size:11px;letter-spacing:5px;color:var(--ink-dim);text-transform:uppercase}
.cap{font-size:16px;color:var(--ink-dim);margin-top:6px}
.gridwrap{flex:1;min-height:0;overflow:auto;padding:8px 36px 16px;display:flex;justify-content:center}
.gridcard{background:#fff;border-radius:14px;box-shadow:0 18px 50px rgba(40,12,140,.28);overflow:hidden;max-width:100%;align-self:flex-start}
table.sheet{border-collapse:separate;border-spacing:0}
.sheet th,.sheet td{border-right:1px solid #efeafa;border-bottom:1px solid #efeafa;padding:9px 12px;vertical-align:top;text-align:left}
.sheet th{background:#f3effd;color:var(--brand);font-weight:600;font-size:12px;font-family:var(--mono);letter-spacing:.3px}
.sheet th.corner{width:36px}
.sheet td.rn{background:#faf9ff;color:#b3acce;text-align:center;font-family:var(--mono);font-size:12px;width:36px}
.val{font-family:var(--mono);font-size:13px;color:var(--card-ink)}
.tags{margin-top:6px;min-height:16px;display:flex;flex-wrap:wrap;gap:4px}
.tag{border-radius:9999px;padding:2px 9px;font-family:var(--mono);font-size:10.5px;font-weight:600;color:#fff;transition:opacity .3s,transform .3s}
.sheet tr.filterrow td{background:#f6f3fe;border-bottom:2px solid #ddd4f5;padding:6px 12px}
/* per-cell pills: NSM meaning (orange, category emoji + prime) + datatype (color by abstract type) */
.cp{margin-top:6px;display:flex;flex-wrap:wrap;gap:5px;align-items:center;min-height:18px}
.primebadge,.dtbadge{border-radius:9999px;padding:3px 11px;font-family:var(--mono);font-size:11px;font-weight:600;color:#fff;text-transform:lowercase;letter-spacing:.2px;white-space:nowrap}
.primebadge{background:#f47b25}    /* NSM — category emoji + prime — orange (accent) */
/* .dtbadge background is set inline per most-abstract type (date/fraction/number) */
/* controls */
.controls{flex:0 0 78px;display:flex;align-items:center;gap:20px;padding:0 36px;z-index:5}
.playbtn{all:unset;cursor:pointer;width:48px;height:48px;border-radius:50%;background:#fff;color:var(--brand);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(40,12,140,.30);transition:transform .16s}
.playbtn:hover{transform:scale(1.06)}
.stepbtn{all:unset;cursor:pointer;color:#fff;opacity:.85;font-size:18px;padding:0 4px}
.scrub{flex:1;height:30px;position:relative;cursor:pointer;display:flex;align-items:center}
.track{width:100%;height:5px;background:rgba(255,255,255,.22);border-radius:9999px;position:relative}
.fill{position:absolute;left:0;top:0;height:100%;background:#fff;border-radius:9999px}
.knob{position:absolute;top:50%;width:15px;height:15px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.2);transform:translate(-50%,-50%)}
.ticks{position:absolute;inset:0;display:flex;justify-content:space-between;align-items:center;pointer-events:none}
.tick{width:2px;height:2px;border-radius:50%;background:rgba(255,255,255,.45)}
.lcount{font-family:var(--mono);font-size:12px;color:#fff;min-width:108px;text-align:right}
.foot{flex:0 0 auto;padding:0 36px 12px;text-align:center;color:var(--ink-faint);font-size:11px}