/* ExamCheck — Blueprint UI. Tokens and measurements from the Claude Design handoff
   (design_handoff_examcheck/README.md). No border radius anywhere except alert dots. */
:root{
  --sheet:#071c30; --ink:#f0f7fc; --ink2:#a8c4d6; --ink3:#7fa5bd; --ink4:#5d829a;
  --hair:rgba(214,236,255,.35); --amber:#e0a83c; --on-amber:#0a1a26; --alert:#e2726d; --pos:#6fc08e;
  --g-fine:rgba(214,236,255,.055); --g-major:rgba(214,236,255,.12); --g-spot:rgba(140,205,255,.40);
  --sans:"IBM Plex Sans Condensed",system-ui,sans-serif; --mono:"IBM Plex Mono",ui-monospace,monospace;
}
body.vellum{
  --sheet:#eceee8; --g-fine:rgba(20,70,105,.11); --g-major:rgba(20,70,105,.19); --g-spot:rgba(16,90,140,.42);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--sheet);color:var(--ink);font-family:var(--sans);min-height:100vh;overflow-x:hidden}
a{color:#8fc2e6;text-decoration:none}a:hover{color:#cfe6f5}
input,select,button{font-family:inherit}
button{cursor:pointer}
[hidden]{display:none!important}
::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#1a3a54}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- the grid: the signature of the design ---------- */
.grid{position:fixed;inset:0;pointer-events:none;z-index:0}
.grid-fine,.grid-spot{background-image:linear-gradient(var(--g-fine) 1px,transparent 1px),linear-gradient(90deg,var(--g-fine) 1px,transparent 1px);background-size:26px 26px}
.grid-fine{-webkit-mask-image:radial-gradient(ellipse 78% 68% at 50% 42%,#000 42%,transparent 100%);mask-image:radial-gradient(ellipse 78% 68% at 50% 42%,#000 42%,transparent 100%)}
.grid-major{background-image:linear-gradient(var(--g-major) 1px,transparent 1px),linear-gradient(90deg,var(--g-major) 1px,transparent 1px);background-size:156px 156px;-webkit-mask-image:radial-gradient(ellipse 72% 62% at 50% 42%,#000 24%,transparent 94%);mask-image:radial-gradient(ellipse 72% 62% at 50% 42%,#000 24%,transparent 94%)}
.grid-spot{background-image:linear-gradient(var(--g-spot) 1px,transparent 1px),linear-gradient(90deg,var(--g-spot) 1px,transparent 1px);opacity:0;transition:opacity .35s ease}
.halo{background:var(--sheet);box-shadow:0 0 26px 15px var(--sheet)}

.page{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:20px 26px 30px;display:flex;flex-direction:column;gap:20px}
.mono{font-family:var(--mono)}
.lbl{font:500 9px var(--mono);letter-spacing:1.9px;text-transform:uppercase}

/* ---------- masthead ---------- */
.mast{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;color:#e6f1f8}
.logo:hover{color:#fff}
.logo-mark{width:26px;height:26px;border:1px solid rgba(214,236,255,.55);display:flex;align-items:center;justify-content:center;font:600 9px var(--mono);color:#dce9f2}
.logo-word{font:700 15px/1 var(--sans);letter-spacing:1px}
.logo-word span{opacity:.45;font-weight:400}
.mast-tools{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.search{display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(214,236,255,.3);padding:0 3px 4px;width:280px}
.search input{flex:1;min-width:0;background:transparent;border:none;outline:none;color:#dfeaf2;font:400 11.5px var(--mono)}
.search input::placeholder{color:#5d829a}
.seg{display:flex;border:1px solid rgba(214,236,255,.28)}
.seg button{padding:6px 14px;border:none;background:transparent;color:#8fb2c8;font:600 9.5px var(--mono);letter-spacing:1.3px}
.seg button+button{border-left:1px solid rgba(214,236,255,.28)}
.seg button[aria-pressed="true"]{background:var(--amber);color:var(--on-amber)}

/* ---------- state chips ---------- */
.chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px}
.chip{flex:none;padding:4px 11px;border:1px solid rgba(214,236,255,.28);background:transparent;color:var(--ink2);font:600 9px var(--mono);letter-spacing:1.1px;white-space:nowrap}
.chip[aria-pressed="true"]{background:var(--amber);border-color:var(--amber);color:var(--on-amber)}

/* ---------- hero ---------- */
.hero{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.hero .lbl{color:var(--amber);margin-bottom:7px}
.hero h1.lbl{margin:0 0 7px;font-weight:500}
.hero .hl{margin:0;font:600 33px/1.05 var(--sans);color:#eaf3fa;letter-spacing:-.3px;max-width:340px}
.intro{font:400 12.5px/1.6 var(--sans);color:#8fb0c6;max-width:760px;margin:14px 0 4px}
.intro a{color:#cfe3f1}
.intro b{color:#eaf3fa;font-weight:600}
.counters{display:flex;gap:22px}
.counter .k{font:500 8px var(--mono);color:var(--ink4);letter-spacing:1.2px}
.counter .v{font:600 16px var(--sans)}
.counter .v.red{color:var(--alert)}.counter .v.amb{color:var(--amber)}.counter .v.ink{color:#dfeaf2}

/* ---------- tabs ---------- */
.tabs{display:flex;border-bottom:1px solid rgba(214,236,255,.25)}
.tab{padding:9px 18px;background:transparent;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;font:600 10px var(--mono);letter-spacing:1.4px;color:var(--ink4)}
.tab[aria-selected="true"]{color:var(--amber);border-bottom-color:var(--amber)}
.tab .short{display:none}

/* ---------- axis (timeline) ---------- */
.axis{position:relative;padding-left:74px}
.axis::before{content:"";position:absolute;left:56px;top:8px;bottom:8px;width:1px;background:linear-gradient(to bottom,transparent,rgba(214,236,255,.42) 7%,rgba(214,236,255,.42) 93%,transparent)}
.axis-list{display:flex;flex-direction:column;gap:26px;margin:0;padding:0;list-style:none}
.node{position:relative}
.tick{position:absolute;left:-74px;top:1px;width:44px;text-align:right;font:600 10.5px/1.25 var(--mono);color:var(--ink2)}
.tick small{display:block;font-weight:400;font-size:8.5px;opacity:.75}
.leader{position:absolute;left:-22px;top:6px;width:22px;height:1px;background:rgba(214,236,255,.42)}
.dot{position:absolute;left:-21px;top:2px;width:8px;height:8px;border:1px solid rgba(214,236,255,.5);background:var(--sheet)}
.node.is-closing .dot{border-color:var(--amber);background:var(--amber)}
.node.is-alert .tick{color:var(--alert)}
.node.is-alert .leader{background:rgba(226,114,109,.6)}
.node.is-alert .dot{border-color:var(--alert);border-radius:50%;background:var(--sheet)}
.node-body{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}
.node-main{flex:1;min-width:0;color:inherit;display:block}
.node-main:hover{color:inherit}
.node-main:hover .node-title{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.node-title{font:700 20px/1.2 var(--sans);color:var(--ink);margin:0}
.node.is-struck .node-title{text-decoration:line-through;text-decoration-color:rgba(226,114,109,.85)}
.meta{font:400 10.5px/1.5 var(--mono);color:var(--ink3);margin-top:3px}
.dim{display:flex;align-items:center;gap:9px;margin-top:10px;max-width:470px}
.dim-l,.dim-r{font:600 8px var(--mono);letter-spacing:1.1px;white-space:nowrap;color:var(--amber)}
.dim-r{color:#eaf3fa}
.dim-r s{opacity:.7;margin-right:4px}
.dim-r .rev{color:var(--pos)}
.dim-bar{flex:1;position:relative;height:8px;min-width:40px}
.dim-bar i{position:absolute;display:block}
.dim-bar .rule{top:3px;left:0;right:0;height:1px;background:rgba(214,236,255,.28)}
.dim-bar .t0{top:0;left:0;width:1px;height:8px;background:currentColor}
.dim-bar .fill{top:3px;left:0;width:0;height:1px;background:var(--amber)}
.dim-bar .t1{top:0;right:0;width:1px;height:8px;background:#eaf3fa}
.node.is-revised .dim-bar .rule{background:linear-gradient(90deg,rgba(214,236,255,.28) 70%,transparent 70%),repeating-linear-gradient(90deg,var(--alert) 0 4px,transparent 4px 7px)}
.badges{display:flex;gap:6px;margin-top:9px;flex-wrap:wrap}
.badge{padding:3px 8px;border:1px solid rgba(214,236,255,.25);color:var(--ink2);font:600 8px var(--mono);letter-spacing:1.1px;text-transform:uppercase}
.note{margin-top:10px;border-left:1px solid var(--alert);padding:2px 0 2px 11px;max-width:520px}
.note-l{font:600 8.5px var(--mono);color:var(--alert);letter-spacing:1.3px;text-transform:uppercase}
.note-b{font:400 12px/1.5 var(--sans);color:#dfeaf2;margin-top:3px}
.node-act{display:flex;gap:7px;flex-shrink:0}
.open-btn{padding:6px 11px;border:1px solid var(--hair);font:600 9px var(--mono);color:#dfeaf2;letter-spacing:1.1px}
.save{width:26px;height:26px;border:1px solid var(--hair);background:transparent;display:flex;align-items:center;justify-content:center;padding:0;color:var(--ink2)}
.save svg{fill:none;stroke:currentColor}
.save[aria-pressed="true"]{border-color:var(--amber);color:var(--amber)}
.save[aria-pressed="true"] svg{fill:var(--amber)}

/* colour states set by app.js */
.c-red{color:var(--alert)!important}.c-amb{color:var(--amber)!important}.c-pos{color:var(--pos)!important}
.c-past{color:#6f93aa!important}.c-blue{color:#8fc2e6!important}.c-ink{color:var(--ink2)!important}
.b-red{border-color:rgba(226,114,109,.6)!important}.b-amb{border-color:rgba(224,168,60,.6)!important}
.b-pos{border-color:rgba(111,192,142,.55)!important}.b-blue{border-color:rgba(143,194,230,.6)!important}

/* ---------- index plates ---------- */
.plates{display:grid;grid-template-columns:repeat(3,1fr);gap:26px 22px;margin:0;padding:0;list-style:none}
.plate{position:relative;border:1px solid var(--hair)}
.plate.is-alert{border-color:rgba(226,114,109,.55)}
.fig{position:absolute;top:-8px;left:12px;padding:0 6px;background:var(--sheet);font:600 9px var(--mono);color:var(--amber);letter-spacing:1.6px;text-transform:uppercase}
.plate.is-alert .fig{color:var(--alert)}
.plate-in{padding:16px 15px 13px;display:flex;flex-direction:column;gap:11px}
.plate-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.plate-head a{color:inherit;display:block}
.plate-title{font:700 18px/1.15 var(--sans);color:var(--ink);margin:0}
.plate-head a:hover .plate-title{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.plate .save{width:24px;height:24px;flex-shrink:0}
.plate-alert{border:1px solid rgba(226,114,109,.45);padding:9px 10px;display:flex;flex-direction:column;gap:4px}
.plate-alert .note-b{font-size:11.5px;margin:0}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(214,236,255,.22)}
.pair>div{background:var(--sheet);padding:8px 9px}
.pair .k{font:500 8.5px var(--mono);color:var(--ink4);letter-spacing:1.2px}
.pair .v{font:600 13.5px/1.2 var(--sans);color:#eaf3fa;margin-top:2px}
.plate-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;border-top:1px dashed rgba(214,236,255,.25);padding-top:9px}
.scope{font:400 9px var(--mono);color:var(--ink4);letter-spacing:.8px;text-transform:uppercase;text-align:right}

.empty{padding:46px 0;text-align:center}
.empty b{display:block;font:600 15px var(--sans);color:#8fb2c8}
.empty span{display:block;font:400 11px var(--mono);color:var(--ink4);margin-top:6px}

.foot{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:10px 26px 40px;font:400 9px/1.7 var(--mono);color:#3f5f76;letter-spacing:1.2px;text-transform:uppercase;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.foot a{color:#5d829a}
.toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:5;padding:7px 12px;background:var(--sheet);border:1px solid var(--hair);font:600 9px var(--mono);letter-spacing:1.3px;color:var(--ink2);text-transform:uppercase}
.toast:empty{display:none}

/* ---------- sheet (exam detail, vellum) ---------- */
body.vellum{color:#123047}
body.vellum a{color:#1f5f86}
.crumb{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.crumb a{font:600 9.5px var(--mono);letter-spacing:1.3px;text-transform:uppercase}
.crumb .r{font:400 9px var(--mono);color:#7d8f9c;letter-spacing:1.2px;text-transform:uppercase}
.s-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap;border-bottom:1px solid #123047;padding-bottom:13px}
.s-org{font:500 9px var(--mono);color:#5c7c92;letter-spacing:1.9px;margin-bottom:6px;text-transform:uppercase}
.s-title{margin:0;font:700 40px/1.02 var(--sans);color:#0e2a3f;letter-spacing:-.5px}
.s-sub{font:400 12px/1.5 var(--mono);color:#4d6d84;margin-top:6px}
.s-btns{display:flex;flex-wrap:wrap}
.s-btns a,.s-btns button{padding:9px 15px;border:1px solid rgba(18,48,71,.4);background:transparent;color:#123047;font:600 9.5px var(--mono);letter-spacing:1.3px;text-transform:uppercase}
.s-btns>*+*{border-left:none!important}
body.vellum .s-btns a.primary{background:#123047;border-color:#123047;color:#eceee8}
.s-btns button[aria-pressed="true"]{background:#123047;color:#eceee8}
.s-alert{border:1px solid rgba(168,69,47,.5);padding:13px 15px;background:rgba(168,69,47,.06)}
.s-alert .l{font:600 9px var(--mono);color:#a8452f;letter-spacing:1.4px;text-transform:uppercase}
.s-alert .b{font:400 13px/1.55 var(--sans);color:#2d4a5e;margin-top:5px}
.s-alert .n{font:600 11.5px/1.5 var(--mono);color:#a8452f;margin-top:7px;border-top:1px dashed rgba(168,69,47,.4);padding-top:6px}
.s-cols{display:flex;gap:30px;align-items:flex-start;flex-wrap:wrap}
.s-main{flex:1;min-width:300px;display:flex;flex-direction:column;gap:22px}
.s-side{width:330px;display:flex;flex-direction:column;gap:16px}
.s-h{font:600 8.5px var(--mono);color:#5c7c92;letter-spacing:1.5px;margin:0 0 12px;text-transform:uppercase}
.ms{position:relative;padding-left:74px;display:flex;flex-direction:column;gap:14px;margin:0;list-style:none}
.ms::before{content:"";position:absolute;left:58px;top:5px;bottom:5px;width:1px;background:rgba(18,48,71,.4)}
.ms li{position:relative;font:500 13px var(--sans);color:#123047}
.ms .d{position:absolute;left:-74px;top:0;width:48px;text-align:right;font:600 9.5px var(--mono);color:inherit}
.ms .ld{position:absolute;left:-17px;top:5px;width:17px;height:1px;background:currentColor}
.ms .nd{position:absolute;left:-16px;top:2px;width:7px;height:7px;border:1px solid currentColor;background:#eceee8}
.ms .tent{font:500 8.5px var(--mono);letter-spacing:1px;color:#7d8f9c;margin-left:6px}
.ms li.live{color:#a8452f;font-weight:600}.ms li.live .nd{background:#a8452f}
.ms li.rev{color:#1d6b47;font-weight:600}
.ms li.done{color:#7d8f9c}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(18,48,71,.25);border:1px solid rgba(18,48,71,.25)}
.stats>div{background:#eceee8;padding:10px 12px}
.stats .k{font:500 8px var(--mono);color:#5c7c92;letter-spacing:1.2px}
.stats .v{font:600 14px var(--sans);color:#123047;margin-top:3px;text-transform:uppercase}
.v.k-red{color:#a8452f}.v.k-pos{color:#1d6b47}.v.k-amb{color:#8a5a12}
.spec{display:grid;grid-template-columns:150px 1fr;gap:14px;padding:9px 0;border-bottom:1px dashed rgba(18,48,71,.25)}
.spec .k{font:400 10px var(--mono);color:#5c7c92;letter-spacing:.8px;text-transform:uppercase}
.spec .v{font:400 12.5px/1.5 var(--sans);color:#123047;overflow-wrap:anywhere}
.qa{padding:10px 0;border-bottom:1px dashed rgba(18,48,71,.25)}
.qa h3{margin:0 0 4px;font:600 13px/1.35 var(--sans);color:#123047}
.qa p{margin:0;font:400 12.5px/1.55 var(--sans);color:#2a4a60}
.box{border:1px solid #123047;padding:15px 16px}
.box.soft{border-color:rgba(18,48,71,.4);padding:13px 14px}
.box-h{display:flex;justify-content:space-between;align-items:baseline;padding-bottom:9px;border-bottom:1px solid rgba(18,48,71,.3);font:600 9px var(--mono);color:#123047;letter-spacing:1.5px}
.box-h span{font-weight:400;color:#7d8f9c;letter-spacing:0}
.fields{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.fields label{display:block;font:500 8.5px var(--mono);color:#5c7c92;letter-spacing:1.3px;margin-bottom:4px}
.fields input,.fields select{width:100%;background:transparent;border:none;border-bottom:1px solid #123047;outline:none;padding:0 0 5px;color:#0e2a3f;font:600 16px var(--sans);border-radius:0}
.fields select{font-size:15px}
.fields input:focus,.fields select:focus{border-bottom-color:#1f5f86;border-bottom-width:2px;padding-bottom:4px}
.go{width:100%;margin-top:14px;padding:9px 0;background:#123047;color:#eceee8;border:none;font:600 9.5px var(--mono);letter-spacing:1.3px}
.verdict{margin-top:13px;border:1px solid #123047;padding:11px 12px}
.verdict.pass{border-color:#1d6b47}.verdict.fail{border-color:#a8452f}
.verdict .h{font:600 10px var(--mono);letter-spacing:1.2px}
.verdict.pass .h{color:#1d6b47}.verdict.fail .h{color:#a8452f}
.verdict .b{font:400 12px/1.5 var(--sans);color:#2d4a5e;margin-top:4px}
.verdict .row{display:flex;justify-content:space-between;gap:8px;border-top:1px dashed rgba(18,48,71,.25);padding-top:5px;margin-top:5px;font:400 10px var(--mono);color:#5c7c92}
.verdict .row b{font-weight:600}
.verdict .row b.ok{color:#1d6b47}.verdict .row b.no{color:#a8452f}
.src-list{margin:11px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}
.src-list li{font:400 12px/1.45 var(--sans);overflow-wrap:anywhere}
.src-list .k{display:block;font:500 8.5px var(--mono);color:#5c7c92;letter-spacing:1.2px;text-transform:uppercase}
.disc{font:400 9px/1.6 var(--mono);color:#7d8f9c}
body.vellum .foot,body.vellum .foot a{color:#7d8f9c}
body.vellum .toast{border-color:rgba(18,48,71,.4);color:#123047}

/* ---------- prose page (about) ---------- */
.prose{max-width:680px;font:400 15px/1.65 var(--sans);color:#dfeaf2}
.prose h1{font:600 33px/1.1 var(--sans);color:#eaf3fa;margin:0 0 6px}
.prose h2{font:600 9px var(--mono);letter-spacing:1.9px;color:var(--amber);text-transform:uppercase;margin:26px 0 6px}
.prose p{margin:0 0 12px}

/* ---------- responsive: ≥1024 two-column; below, tabs move to a bottom bar ---------- */
@media (max-width:1023px){
  .tabs{position:fixed;left:0;right:0;bottom:0;z-index:4;background:var(--sheet);border-bottom:none;border-top:1px solid rgba(214,236,255,.25)}
  .tab{flex:1;padding:14px 0;border-bottom:none;border-top:2px solid transparent;margin:-1px 0 0;font-size:9px;letter-spacing:1.2px}
  .tab[aria-selected="true"]{border-top-color:var(--amber)}
  .tab .long{display:none}.tab .short{display:inline}
  body.home{padding-bottom:52px}
  body.home .toast{bottom:64px}
  .plates{grid-template-columns:repeat(2,1fr)}
  .s-side{width:100%}
}
@media (max-width:640px){
  .page{padding:16px 16px 24px;gap:18px}
  .foot{padding:10px 16px 30px}
  .search{width:100%;order:2}
  .mast-tools{width:100%}
  .hero .hl{font-size:25px;text-wrap:balance}
  .axis{padding-left:52px}
  .axis::before{left:38px}
  .tick{left:-52px;width:30px}
  .leader{left:-16px;width:16px}
  .dot{left:-15px}
  .node-title{font-size:17px}
  .open-btn{display:none}
  .plates{grid-template-columns:1fr}
  .s-title{font-size:30px}
  .stats{grid-template-columns:1fr 1fr}
  .s-main{min-width:0}
  .spec{grid-template-columns:110px 1fr}
}