/* ============================================================================
   vsi-kit.css — the shared VSI component kit
   Tokens inherited from VSI_How_I_Work_With_AI_v6_0a.html via tokens.css v1.0b.
   The reading surface is paper by deliberate decision: dark is worse than paper
   for long prose and the primary reader is 83. Colour means something here —
   verdigris = solid evidence, brass = the one live accent, signal = weak or
   contested — so it is not themed away. One kit, consumed by every VSI site.
   ============================================================================ */

:root{
  --paper:#ECEEE7; --paper-raised:#F4F6F0; --paper-sunk:#E4E7DE;
  --ink:#1B2A2E; --ink-soft:#3D4C4E; --ink-faint:#6B7876;
  --rule:#C9CEC2;
  --verdigris:#1F6F5C; --verdigris-deep:#154E41;
  --signal:#A63A2E;
  --brass:#B08239; --brass-deep:#8A6526;
  --canvas:#12161F; --canvas-lift:#1A2030; --canvas-edge:#2B3346;
  --canvas-ink:#F4F6FA;

  --tint-verd:#E4EFEA; --tint-brass:#F2E9D6; --tint-signal:#F2E0DC;

  --f-serif:Georgia,"Times New Roman",serif;
  --f-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --f-mono:"SFMono-Regular",Menlo,Consolas,monospace;
  --shadow:0 1px 2px rgba(27,42,46,.05),0 10px 26px rgba(27,42,46,.06);
  --shadow-lift:0 2px 6px rgba(27,42,46,.08),0 18px 40px rgba(27,42,46,.10);
  --wrap:60rem; --measure:38rem;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-serif);font-size:1.08rem;line-height:1.62;-webkit-font-smoothing:antialiased}
.vsi-wrap{max-width:var(--wrap);margin:0 auto;padding-inline:20px}
.vsi-measure{max-width:var(--measure)}
h1,h2,h3,h4{font-family:var(--f-serif);line-height:1.16;font-weight:600;letter-spacing:-.005em;text-wrap:balance}
a{color:var(--verdigris-deep)}
.eyebrow{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint)}

/* dim-the-lights: a reading-comfort dimmer, not a dark theme */
#vsi-dim{position:fixed;inset:0;background:#0d1416;pointer-events:none;opacity:0;
  transition:opacity .3s;z-index:60;mix-blend-mode:multiply}
body.dimmed #vsi-dim{opacity:.34}

/* -------- top navigation (the thing that was missing) -------- */
.vsi-nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;
  background:rgba(236,238,231,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule)}
.vsi-nav-inner{max-width:var(--wrap);margin:0 auto;padding:.55rem 20px;
  display:flex;align-items:center;gap:1rem}
.vsi-brand{font-family:var(--f-serif);font-weight:600;font-size:1rem;white-space:nowrap;
  text-decoration:none;color:var(--ink)}
.vsi-brand small{display:block;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-faint);font-weight:400}
.vsi-nav-links{margin-left:auto;display:flex;gap:.15rem;flex-wrap:wrap;align-items:center}
.vsi-nav-links a{font-family:var(--f-sans);font-size:.82rem;color:var(--ink-soft);
  text-decoration:none;padding:.35em .6em;border-radius:7px;white-space:nowrap}
.vsi-nav-links a:hover{background:var(--paper-sunk);color:var(--ink)}
.vsi-nav-links a[aria-current="true"]{color:var(--verdigris-deep);box-shadow:inset 0 -2px 0 var(--brass)}
.vsi-dim-btn{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.04em;cursor:pointer;
  background:transparent;border:1px solid var(--rule);border-radius:20px;padding:.35em .7em;color:var(--ink-soft)}
.vsi-dim-btn:hover{border-color:var(--brass)}
.vsi-menu-toggle{display:none}
@media (max-width:640px){
  .vsi-nav-links{position:fixed;inset:auto 0 0 0;top:0;background:var(--paper);
    flex-direction:column;align-items:stretch;gap:0;padding:4rem 20px 2rem;
    transform:translateX(100%);transition:transform .25s;overflow:auto}
  .vsi-nav-links.open{transform:none}
  .vsi-nav-links a{font-size:1.05rem;padding:.7em .4em;border-bottom:1px solid var(--rule)}
  .vsi-menu-toggle{display:inline-flex;margin-left:auto;font-family:var(--f-mono);font-size:.72rem;
    background:transparent;border:1px solid var(--rule);border-radius:8px;padding:.4em .7em;cursor:pointer;color:var(--ink);z-index:50}
}

/* -------- hero -------- */
.vsi-hero{position:relative;border-bottom:1px solid var(--rule);overflow:hidden}
.vsi-hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(130% 90% at 15% -20%,rgba(176,130,57,.16),transparent 55%);pointer-events:none}
.vsi-hero-inner{position:relative;padding-block:clamp(2.8rem,8vw,5rem) clamp(1.6rem,4vw,2.4rem)}
.vsi-lead{font-size:clamp(2.1rem,6vw,3.5rem);line-height:1.08;margin:.5rem 0 .1rem;max-width:18ch}
.vsi-lead .amp{color:var(--brass)}
.vsi-participation{font-size:clamp(1.15rem,2.6vw,1.4rem);color:var(--ink-soft);max-width:34rem;margin:1rem 0 0}
.vsi-participation b{color:var(--ink);font-weight:600}
.vsi-hero-meta{margin-top:1.6rem;font-family:var(--f-mono);font-size:.74rem;letter-spacing:.04em;color:var(--ink-faint)}

/* -------- section scaffolding -------- */
.vsi-section{padding-block:clamp(2.2rem,5vw,3.4rem);scroll-margin-top:4rem;border-bottom:1px solid var(--rule)}
.vsi-kicker{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-deep);margin:0 0 .5rem}
.vsi-h2{font-size:clamp(1.5rem,4vw,2.1rem);margin:0 0 .3em}
.vsi-sub{color:var(--ink-soft);max-width:42rem;margin:0 0 1.5rem}

/* -------- state chips + always-visible legend (spec §2) -------- */
.vsi-chip{display:inline-flex;align-items:center;gap:.4em;font-family:var(--f-mono);
  font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600;
  padding:.24em .6em;border-radius:20px;border:1px solid;white-space:nowrap}
.vsi-chip::before{content:"";width:.5em;height:.5em;border-radius:50%;background:currentColor}
.vsi-chip[data-state="live"]{color:var(--verdigris-deep);background:var(--tint-verd);border-color:var(--verdigris)}
.vsi-chip[data-state="alpha"]{color:var(--brass-deep);background:var(--tint-brass);border-color:var(--brass)}
.vsi-chip[data-state="specified"]{color:var(--ink-soft);background:var(--paper-sunk);border-color:var(--rule)}
.vsi-chip[data-state="named"]{color:var(--ink-faint);background:transparent;border-color:var(--rule)}
.vsi-legend{display:flex;flex-wrap:wrap;gap:.6rem 1.1rem;padding:1rem 1.1rem;
  background:var(--paper-raised);border:1px solid var(--rule);border-radius:12px;margin-bottom:1.6rem}
.vsi-legend div{display:flex;gap:.5rem;align-items:baseline;font-size:.9rem;color:var(--ink-soft);flex:1 1 13rem}
.vsi-legend b{color:var(--ink)}

/* -------- campus: rooms -------- */
.vsi-campus{display:grid;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:1rem}
.vsi-room{background:var(--paper-raised);border:1px solid var(--rule);border-radius:14px;
  padding:1.1rem 1.15rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.5rem;
  border-top:3px solid var(--rule);transition:transform .14s,box-shadow .14s}
.vsi-room[data-state="live"]{border-top-color:var(--verdigris)}
.vsi-room[data-state="alpha"]{border-top-color:var(--brass)}
.vsi-room[data-state="specified"]{border-top-color:var(--ink-faint)}
.vsi-room[data-state="named"]{border-top-color:var(--rule)}
.vsi-room:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
.vsi-room h3{font-size:1.15rem;margin:0;display:flex;justify-content:space-between;gap:.6rem;align-items:baseline}
.vsi-room p{margin:0;font-size:.96rem;color:var(--ink-soft)}
.vsi-room .inside{font-family:var(--f-mono);font-size:.72rem;color:var(--ink-faint);letter-spacing:.02em}
.vsi-room a.enter{margin-top:auto;font-family:var(--f-sans);font-size:.86rem;font-weight:600;
  color:var(--verdigris-deep);text-decoration:none}
.vsi-room a.enter:hover{text-decoration:underline}
.vsi-room a.enter[aria-disabled="true"]{color:var(--ink-faint);cursor:default;pointer-events:none;font-weight:400}

/* -------- ClaimCard: no claim renders without grade + provenance (spec §7.2,§13) -------- */
.vsi-claim{border:1px solid var(--rule);border-left:3px solid var(--verdigris);border-radius:10px;
  background:var(--paper-raised);padding:.85rem 1rem;margin:1rem 0}
.vsi-claim[data-grade="c"],.vsi-claim[data-grade="contested"]{border-left-color:var(--signal)}
.vsi-claim[data-grade="pending"]{border-left-color:var(--brass)}
.vsi-claim .claim-text{font-size:1.02rem;margin:0 0 .5rem}
.vsi-claim .claim-meta{display:flex;flex-wrap:wrap;gap:.5rem .9rem;align-items:center;
  font-family:var(--f-mono);font-size:.7rem;color:var(--ink-faint)}
.vsi-grade{font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:.15em .5em;border-radius:5px}
.vsi-grade[data-g="a"],.vsi-grade[data-g="b"]{color:var(--verdigris-deep);background:var(--tint-verd)}
.vsi-grade[data-g="c"],.vsi-grade[data-g="contested"]{color:var(--signal);background:var(--tint-signal)}
.vsi-grade[data-g="pending"]{color:var(--brass-deep);background:var(--tint-brass)}
.vsi-prov a{color:var(--ink-soft)}

/* -------- layered deep dive -------- */
.vsi-dd-card{background:var(--paper-raised);border:1px solid var(--rule);border-radius:12px;padding:1rem 1.1rem;margin:0 0 1rem}
.vsi-dd-card h3{font-size:1.12rem;margin:0 0 .2em}
.vsi-dd-plain{margin:.4rem 0 .2rem}
.vsi-dd-btn{display:inline-flex;align-items:center;gap:.4rem;margin:.6rem .5rem 0 0;
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.02em;cursor:pointer;
  background:transparent;color:var(--verdigris-deep);border:1px solid var(--rule);border-radius:20px;padding:.4em .8em;transition:.14s}
.vsi-dd-btn:hover{border-color:var(--verdigris)}
.vsi-dd-btn[aria-expanded="true"]{background:var(--verdigris);color:#fff;border-color:var(--verdigris)}
.vsi-dd-btn .chev{transition:transform .2s}
.vsi-dd-btn[aria-expanded="true"] .chev{transform:rotate(90deg)}
.vsi-dd-layer{display:none;border-top:1px dashed var(--rule);margin-top:.8rem;padding-top:.8rem}
.vsi-dd-layer.open{display:block;animation:vsiFade .26s ease}
.vsi-dd-layer h4{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);margin:0 0 .4rem}
.vsi-formula{font-family:var(--f-mono);font-size:.88rem;background:var(--paper-sunk);border:1px solid var(--rule);
  border-radius:7px;padding:.65rem .8rem;margin:.3rem 0;overflow-x:auto;color:var(--verdigris-deep)}
@keyframes vsiFade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* -------- moderated interview (Boolean-gated, client-side) -------- */
.vsi-iv{background:var(--paper-raised);border:1px solid var(--rule);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.vsi-iv-top{display:flex;justify-content:space-between;align-items:center;gap:.8rem;flex-wrap:wrap;
  padding:1rem 1.15rem;border-bottom:1px solid var(--rule)}
.vsi-iv-who{display:flex;gap:.7rem;align-items:center}
.vsi-iv-dot{width:34px;height:34px;border-radius:50%;background:radial-gradient(140% 140% at 30% 20%,var(--brass),var(--verdigris))}
.vsi-iv-who b{display:block;font-size:1rem}.vsi-iv-who span{font-size:.78rem;color:var(--ink-faint)}
.vsi-iv-prog{font-family:var(--f-mono);font-size:.68rem;color:var(--ink-faint);letter-spacing:.05em}
.vsi-iv-stage{padding:1.2rem 1.15rem 1.3rem}
.vsi-iv-q{font-size:1.2rem;line-height:1.28;margin:0 0 .3rem;text-wrap:balance}
.vsi-iv-hint{color:var(--ink-soft);font-size:.92rem;margin:0 0 1rem}
.vsi-iv-opts{display:flex;flex-direction:column;gap:.55rem}
.vsi-iv-opt{text-align:left;font-family:var(--f-serif);font-size:1rem;color:var(--ink);background:var(--paper);
  border:1px solid var(--rule);border-radius:10px;padding:.75rem .9rem;cursor:pointer;transition:.14s;line-height:1.35}
.vsi-iv-opt:hover{border-color:var(--verdigris);transform:translateY(-1px);box-shadow:var(--shadow)}
.vsi-iv-opt .mini{display:block;font-size:.8rem;color:var(--ink-faint);margin-top:.15rem}
.vsi-banner{border-radius:10px;padding:.8rem .95rem;margin:0 0 1rem;font-size:.94rem;border:1px solid}
.vsi-banner[data-tone="calm"]{background:var(--tint-verd);border-color:var(--verdigris)}
.vsi-banner[data-tone="caution"]{background:var(--tint-brass);border-color:var(--brass)}
.vsi-banner[data-tone="stop"]{background:var(--tint-signal);border-color:var(--signal)}
.vsi-note{font-family:var(--f-mono);font-size:.84rem;line-height:1.55;background:var(--paper-sunk);
  border:1px solid var(--rule);border-left:3px solid var(--verdigris);border-radius:7px;padding:.85rem 1rem;margin:.3rem 0 1rem;white-space:pre-wrap}
.vsi-flags{list-style:none;padding:0;margin:.2rem 0 1rem;display:flex;flex-direction:column;gap:.45rem}
.vsi-flags li{display:flex;gap:.6rem;align-items:flex-start;font-size:.94rem}
.vsi-flags .ic{font-family:var(--f-mono);font-weight:700;flex:0 0 auto}
.vsi-flags .g{color:var(--verdigris)} .vsi-flags .a{color:var(--brass-deep)} .vsi-flags .r{color:var(--signal)}

/* -------- buttons -------- */
.vsi-btn{font-family:var(--f-mono);font-size:.76rem;letter-spacing:.04em;cursor:pointer;border-radius:22px;
  padding:.55em .95em;border:1px solid var(--rule);background:transparent;color:var(--ink);transition:.14s}
.vsi-btn:hover{border-color:var(--verdigris)}
.vsi-btn.primary{background:var(--verdigris);color:#fff;border-color:var(--verdigris)}
.vsi-btn.primary:hover{background:var(--verdigris-deep)}
.vsi-row{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:.5rem}

/* -------- the question box (Alpha 1, spec §5.1 §6) -------- */
.vsi-ask{background:var(--paper-raised);border:1px solid var(--rule);border-radius:16px;box-shadow:var(--shadow);padding:1.2rem 1.2rem 1.3rem}
.vsi-ask textarea{width:100%;font-family:var(--f-serif);font-size:1.05rem;line-height:1.5;color:var(--ink);
  background:var(--paper);border:1px solid var(--rule);border-radius:10px;padding:.8rem .9rem;resize:vertical;min-height:5.5rem}
.vsi-ask textarea:focus{outline:2px solid var(--verdigris);outline-offset:1px}
.vsi-consent{list-style:none;padding:0;margin:1rem 0 .3rem;display:flex;flex-direction:column;gap:.6rem}
.vsi-consent li{display:flex;gap:.6rem;align-items:flex-start}
.vsi-consent label{font-size:.96rem;color:var(--ink);line-height:1.4}
.vsi-consent input[type=checkbox]{width:1.15rem;height:1.15rem;margin-top:.15rem;accent-color:var(--verdigris);flex:0 0 auto}
.vsi-consent .subtle{display:block;font-size:.8rem;color:var(--ink-faint)}
.vsi-email{margin:.4rem 0 0 1.75rem;display:none}
.vsi-email.show{display:block}
.vsi-email input{font-family:var(--f-sans);font-size:.95rem;padding:.5rem .7rem;border:1px solid var(--rule);border-radius:8px;width:min(20rem,100%);background:var(--paper)}
.vsi-ask-foot{font-size:.9rem;color:var(--ink-soft);margin:.9rem 0 0}
.vsi-ask-note{font-family:var(--f-mono);font-size:.68rem;color:var(--ink-faint);margin-top:.7rem;letter-spacing:.02em}

/* -------- routing / help tags (spec §4.1) -------- */
.vsi-route{display:inline-block;font-family:var(--f-mono);font-size:.64rem;letter-spacing:.06em;text-transform:uppercase;
  padding:.2em .55em;border-radius:5px;background:var(--tint-signal);color:var(--signal);border:1px solid var(--signal)}

/* -------- footer -------- */
.vsi-footer{padding-block:2.4rem 3rem;color:var(--ink-faint);font-size:.86rem}
.vsi-footer .badge{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--verdigris-deep)}
.vsi-footer a{color:var(--ink-soft)}
.vsi-tablewrap{overflow-x:auto;border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow)}
table.vsi{border-collapse:collapse;width:100%;min-width:30rem;font-size:.95rem}
table.vsi th,table.vsi td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--rule);vertical-align:top}
table.vsi thead th{background:var(--paper-sunk);font-family:var(--f-mono);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft)}
table.vsi tbody tr:last-child td{border-bottom:none}