:root{
  --ground:#F3F5F7; --surface:#FFFFFF; --surface-2:#E9ECEF; --raise:#FFFFFF;
  --line:#D3D9DF; --line-soft:#E3E7EB;
  --text:#172632; --text-2:#405466; --text-3:#617386;
  --accent:#2E6E4F; --accent-2:#20543A; --accent-soft:#E1F0E6;
  --brand:#176A62; --brand-text:#FFFFFF;
  --focus:#2563A8;
  --ok:#1F6F52; --ok-soft:#DEEFE7; --bad:#A8352E; --bad-soft:#F8E2E0;
  --flag:#5B4B9E; --flag-soft:#E9E5F6;
  --shadow:0 1px 2px rgba(20,30,40,.06), 0 8px 24px -12px rgba(20,30,40,.18);
  --shadow-lift:0 2px 4px rgba(20,30,40,.08), 0 18px 40px -18px rgba(20,30,40,.30);
  --r:10px; --content-max:1240px; --display-scale:1;
  --mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  --disp:ui-sans-serif,"Avenir Next",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --body:ui-serif,"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ground:#0E141A; --surface:#161E26; --surface-2:#1D2731; --raise:#1A232C;
    --line:#2C3844; --line-soft:#212C36;
    --text:#EDF2F4; --text-2:#BCC7CD; --text-3:#93A2AA;
    --accent:#79C99B; --accent-2:#A7E3BD; --accent-soft:#173C2A;
    --brand:#77D5C4; --brand-text:#0A211D;
    --focus:#8CC5FF;
    --ok:#54BC90; --ok-soft:#15302A; --bad:#E4796F; --bad-soft:#351F1D;
    --flag:#9B8CDC; --flag-soft:#231E39;
    --shadow:0 1px 2px rgba(0,0,0,.5), 0 8px 24px -12px rgba(0,0,0,.7);
    --shadow-lift:0 2px 4px rgba(0,0,0,.5), 0 18px 40px -18px rgba(0,0,0,.85);
  }
}
:root[data-theme="dark"]{
  --ground:#0E141A; --surface:#161E26; --surface-2:#1D2731; --raise:#1A232C;
  --line:#2C3844; --line-soft:#212C36;
  --text:#EDF2F4; --text-2:#BCC7CD; --text-3:#93A2AA;
  --accent:#79C99B; --accent-2:#A7E3BD; --accent-soft:#173C2A;
  --brand:#77D5C4; --brand-text:#0A211D;
  --focus:#8CC5FF;
  --ok:#54BC90; --ok-soft:#15302A; --bad:#E4796F; --bad-soft:#351F1D;
  --flag:#9B8CDC; --flag-soft:#231E39;
  --shadow:0 1px 2px rgba(0,0,0,.5), 0 8px 24px -12px rgba(0,0,0,.7);
  --shadow-lift:0 2px 4px rgba(0,0,0,.5), 0 18px 40px -18px rgba(0,0,0,.85);
}

*{box-sizing:border-box}
body{
  margin:0; background:var(--ground); color:var(--text);
  font-family:var(--body); font-size:18px; line-height:1.72; letter-spacing:.003em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--disp); text-wrap:balance; margin:0; line-height:1.16; letter-spacing:-.02em}
p{margin:0}
a{color:var(--accent-2)}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:4px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.eyebrow{
  font-family:var(--disp); font-size:11px; font-weight:700; letter-spacing:.08em;
  text-transform:uppercase; color:var(--text-3);
}
.mono{font-family:var(--mono); font-variant-numeric:tabular-nums}
.content-status{
  max-width:var(--content-max); min-height:calc(100vh - 66px); margin:0 auto; padding:clamp(56px,12vh,150px) 22px 90px;
}
.content-status h1{max-width:620px; margin-top:8px; font-size:clamp(30px,4.4vw,46px)}
.content-status p{max-width:560px; margin-top:16px; color:var(--text-2); font-size:18px; line-height:1.68}
.content-status .btn{margin-top:24px}
[data-content-state="loading"] .tabs{opacity:.55; pointer-events:none}
.tab:disabled{opacity:.55; cursor:not-allowed}

/* ---------- top bar ---------- */
.topbar{
  position:sticky; top:0; z-index:60; background:var(--surface);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  max-width:1240px; margin:0 auto; padding:0 22px; height:66px;
  display:flex; align-items:center; gap:18px;
}
.brand{display:flex; align-items:center; gap:12px; min-width:0}
.brand-mark{
  display:inline-flex; align-items:center; gap:1px; padding:9px 11px 8px; border-radius:6px;
  background:var(--brand); color:var(--brand-text); font-family:var(--disp); font-size:23px; font-weight:800;
  letter-spacing:-.055em; line-height:1; white-space:nowrap;
}
.brand-mark span{display:inline-block}
.brand-mark span:nth-child(1){transform:translateY(-1px) rotate(-2deg)}
.brand-mark span:nth-child(2){transform:translateY(1px) rotate(1deg)}
.brand-mark span:nth-child(3){transform:translateY(-.5px) rotate(-1deg)}
.brand-code{
  font-family:var(--mono); font-weight:700; font-size:16px; letter-spacing:.04em; color:var(--text); white-space:nowrap;
}
.brand-sub{font-family:var(--mono); font-size:12px; color:var(--text-3); white-space:nowrap}
.tabs{margin-left:auto; display:flex; gap:2px; background:var(--surface-2); padding:3px; border-radius:8px}
.tab{
  font-family:var(--disp); font-weight:600; font-size:13px; color:var(--text-2);
  background:none; border:0; padding:7px 15px; border-radius:6px; cursor:pointer;
  transition:background .15s, color .15s;
}
.tab:hover{color:var(--text)}
.tab[aria-current="page"]{background:var(--surface); color:var(--text); box-shadow:0 1px 2px rgba(0,0,0,.12)}
.mobile-nav{display:none}
.display-menu{position:relative; flex:none}
.display-menu summary{
  display:flex; align-items:center; height:34px; padding:0 10px; border:1px solid var(--line); border-radius:6px;
  background:var(--surface); color:var(--text-2); font-family:var(--disp); font-size:12px; font-weight:700; cursor:pointer; list-style:none;
}
.display-menu summary::-webkit-details-marker{display:none}
.display-menu summary::after{content:""; width:6px; height:6px; margin:0 0 3px 7px; border-right:1.5px solid currentColor; border-bottom:1.5px solid currentColor; transform:rotate(45deg)}
.display-menu[open] summary{border-color:var(--text-3); color:var(--text)}
.display-panel{
  position:absolute; top:calc(100% + 8px); right:0; z-index:80; width:min(calc(244px * var(--display-scale)), calc(100vw - 28px)); padding:15px;
  border:1px solid var(--line); border-radius:var(--r); background:var(--surface); box-shadow:var(--shadow-lift);
}
.display-panel h2{font-size:14px}
.display-row{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:12px; font-family:var(--disp)}
.display-row > span{font-size:12.5px; font-weight:700; color:var(--text-2)}
.text-size-status{min-width:38px; color:var(--text-3); font-family:var(--mono); font-size:11px; font-weight:600; text-align:center}
.display-stepper,.theme-options{display:flex; gap:4px; padding:3px; border-radius:7px; background:var(--surface-2)}
.display-panel button{
  min-width:34px; height:32px; padding:0 8px; border:0; border-radius:5px;
  background:transparent; color:var(--text-2); font-family:var(--disp); font-size:12px; font-weight:700; cursor:pointer;
}
.display-panel button:hover:not(:disabled){color:var(--text)}
.display-panel button:disabled{opacity:.4; cursor:not-allowed}
.theme-options button{min-width:64px}
.theme-options button[aria-pressed="true"]{background:var(--surface); color:var(--text); box-shadow:0 1px 2px rgba(0,0,0,.12)}
:root[data-text-size="x-small"]{--display-scale:.8}
:root[data-text-size="small"]{--display-scale:.9}
:root[data-text-size="large"]{--display-scale:1.1}
:root[data-text-size="x-large"]{--display-scale:1.2}
:root[data-text-size="xx-large"]{--display-scale:1.3}
:root[data-text-size="xxx-large"]{--display-scale:1.4}
:root[data-text-size="huge"]{--display-scale:1.5}
:root[data-text-size="x-huge"]{--display-scale:1.6}
:root[data-text-size="xx-huge"]{--display-scale:1.7}


/* ---------- today ---------- */
.today-wrap{max-width:var(--content-max); margin:0 auto; padding:48px 22px 90px}
.today-hero h1{font-size:clamp(32px,4.4vw,48px)}
.today-hero p{margin-top:16px; color:var(--text-2); font-size:18px; line-height:1.68}
.today-grid{display:grid; grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr); gap:20px; margin-top:30px}
.today-card{border:1px solid var(--line); border-radius:var(--r); background:var(--surface); box-shadow:var(--shadow); padding:24px}
.today-card h2{font-size:21px}
.today-card p{margin-top:8px; color:var(--text-2); font-size:15px}
.today-next .eyebrow{color:var(--accent-2)}
.today-next h2{margin-top:8px; font-size:26px}
.today-next .startbar{margin-top:18px}
.today-stack{display:grid; gap:14px}
.today-link{width:100%; text-align:left; padding:15px 16px; border:1px solid var(--line); border-radius:8px; background:var(--surface); color:var(--text); cursor:pointer}
.today-link:hover{border-color:var(--accent); background:var(--accent-soft)}
.today-link strong,.today-link span{display:block}
.today-link strong{font-family:var(--disp); font-size:15px}
.today-link span{margin-top:3px; color:var(--text-2); font-family:var(--disp); font-size:13px; line-height:1.45}
.today-note{margin-top:22px; color:var(--text-3); font-family:var(--disp); font-size:13px}
.storage-notice{margin-top:16px; padding:11px 13px; border-left:3px solid var(--bad); background:var(--bad-soft); color:var(--text); font-family:var(--disp); font-size:13px; line-height:1.5}
.certification-brief{margin-top:28px; padding:22px 24px}
.certification-brief h2{font-size:21px}
.certification-brief > p{margin-top:7px; color:var(--text-2); font-size:15px}
.certification-facts{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:1px; margin-top:17px; background:var(--line); border:1px solid var(--line); border-radius:8px; overflow:hidden}
.certification-facts div{padding:12px 14px; background:var(--surface)}
.certification-facts dt{font-family:var(--disp); font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--text-3)}
.certification-facts dd{margin:4px 0 0; font-family:var(--disp); font-size:15px; font-weight:700; line-height:1.35}
.certification-domains{margin-top:15px; color:var(--text-2); font-family:var(--disp); font-size:14px; line-height:1.55}

/* ---------- hero ---------- */
.hero{max-width:1240px; margin:0 auto; padding:44px 22px 26px}
.hero h1{font-size:clamp(29px,4.4vw,46px); font-weight:700}
.hero .lede{margin-top:16px; color:var(--text-2); font-size:18px; line-height:1.68}
.facts{
  margin-top:26px; display:grid; gap:1px; background:var(--line);
  border:1px solid var(--line); border-radius:var(--r); overflow:hidden;
  grid-template-columns:repeat(auto-fit,minmax(128px,1fr));
}
.fact{background:var(--surface); padding:13px 15px}
.fact dt{font-family:var(--mono); font-size:10.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--text-3)}
.fact dd{margin:4px 0 0; font-family:var(--disp); font-weight:600; font-size:19px; font-variant-numeric:tabular-nums}
.fact dd small{font-family:var(--body); font-weight:400; font-size:13px; color:var(--text-3)}

/* ---------- study layout ---------- */
.study-wrap{max-width:1240px; margin:0 auto; padding:8px 22px 90px; display:grid; grid-template-columns:230px minmax(0,1fr); gap:44px; align-items:start}
.rail{position:sticky; top:78px; display:flex; flex-direction:column; gap:5px}
.rail-h{margin-bottom:6px}
.rail a{
  display:grid; grid-template-columns:auto minmax(0,1fr) auto; align-items:center;
  column-gap:9px; row-gap:7px; text-decoration:none; color:var(--text-2);
  padding:6px 4px 8px; border-radius:6px;
  font-family:var(--disp); font-size:13.5px; font-weight:500; transition:color .15s;
}
.rail a .n{
  font-family:var(--mono); font-size:10.5px; font-weight:600; width:20px; height:20px;
  border-radius:5px; display:grid; place-items:center;
  background:var(--surface-2); color:var(--text-3);
  transition:background .15s, color .15s;
}
.rail a:hover{color:var(--text)}
.rail a:hover .n{background:var(--line)}
.rail a.on{color:var(--text)}
.rail a.on .t{font-weight:600}
.rail a.on .n{background:var(--accent); color:var(--surface)}
.rail .wnum{font-family:var(--mono); font-size:10px; color:var(--text-3); font-weight:500}
.rail a.on .wnum{color:var(--accent-2)}
.rail .wbar{grid-column:2 / -1; height:3px; background:var(--line-soft); border-radius:2px; overflow:hidden}
.rail .wbar i{display:block; height:100%; background:var(--line); border-radius:2px; transition:background .15s}
.rail a.on .wbar i{background:var(--accent)}
.rail a.ref .n{background:none}
.rail a.ref .n::before{content:""; width:5px; height:5px; border-radius:1px; background:var(--text-3); transition:background .15s}
.rail a.ref:hover .n::before{background:var(--text-2)}
.rail a.ref.on .n::before{background:var(--accent)}

.doc{min-width:0; max-width:none}
section.dom{scroll-margin-top:86px; padding-top:38px}
.doc > section.dom[hidden]{display:none}
.dom-head{border-bottom:2px solid var(--text); padding-bottom:12px; margin-bottom:8px}
.dom-head .row{display:flex; align-items:baseline; gap:12px; flex-wrap:wrap}
.dom-head h2{font-size:26px; font-weight:700}
.dom-weight{
  font-family:var(--mono); font-size:11.5px; font-weight:600; color:var(--accent-2);
  background:var(--accent-soft); padding:3px 8px; border-radius:20px; white-space:nowrap;
}
h3.sub{font-size:18px; font-weight:650; margin:34px 0 11px; letter-spacing:-.01em}
h3.sub::before{content:""; display:inline-block; width:14px; height:2px; background:var(--accent); vertical-align:middle; margin-right:9px; transform:translateY(-2px)}
.doc p{margin:12px 0; color:var(--text-2); line-height:1.74}
.doc ul{margin:10px 0; padding-left:0; list-style:none}
.doc ul li{position:relative; padding-left:19px; margin:9px 0; color:var(--text-2); line-height:1.68}
.doc ul li::before{content:""; position:absolute; left:4px; top:.72em; width:5px; height:5px; border-radius:50%; background:var(--line); }
.doc strong{color:var(--text); font-weight:600}
code{font-family:var(--mono); font-size:.86em; background:var(--surface-2); padding:1.5px 5px; border-radius:4px; color:var(--text)}

.tblwrap{overflow-x:auto; margin:14px 0; border:1px solid var(--line); border-radius:var(--r); background:var(--surface)}
table{border-collapse:collapse; width:100%; font-family:var(--disp); font-size:15px; line-height:1.55; letter-spacing:0}
th,td{text-align:left; padding:11px 14px; border-bottom:1px solid var(--line-soft); vertical-align:top}
thead th{
  font-family:var(--mono); font-size:10.5px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--text-3); font-weight:600; background:var(--surface-2); border-bottom:1px solid var(--line);
  position:sticky; top:0;
}
tbody tr:last-child td{border-bottom:0}
td:first-child{font-weight:600; color:var(--text); white-space:nowrap}
td em{font-style:normal; color:var(--text-3)}

.callout{
  border:1px solid var(--line); background:var(--surface);
  border-radius:0 var(--r) var(--r) 0; padding:13px 16px; margin:18px 0;
}
.callout .eyebrow{color:var(--accent-2); margin-bottom:5px}
.callout p{margin:0; font-size:16px; line-height:1.65}

.vs{display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; margin:14px 0; grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.vs > div{background:var(--surface); padding:13px 15px}
.vs h4{font-family:var(--mono); font-size:11.5px; letter-spacing:.06em; color:var(--accent-2); margin-bottom:6px}
.vs p{margin:0; font-size:15px; line-height:1.6}

/* ---------- exam ---------- */
.exam-wrap{max-width:1240px; margin:0 auto; padding:0 22px 90px}
.hidden{display:none!important}

.start{max-width:var(--content-max); margin:44px auto; }
.start h2{font-size:30px; font-weight:700}
.start > p{color:var(--text-2); margin-top:14px; font-size:18px; line-height:1.68}
.optbox{margin-top:26px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface); overflow:hidden}
.optrow{display:flex; align-items:center; gap:16px; padding:15px 18px; border-bottom:1px solid var(--line-soft); flex-wrap:wrap}
.optrow:last-child{border-bottom:0}
.optrow .lbl{font-family:var(--disp); font-weight:600; font-size:14.5px; min-width:150px}
.optrow .hint{font-size:13.5px; color:var(--text-3); flex:1 1 220px; font-family:var(--disp)}
.seg{display:flex; gap:2px; background:var(--surface-2); padding:3px; border-radius:8px; flex-wrap:wrap}
.seg button{
  font-family:var(--disp); font-weight:600; font-size:12.5px; border:0; background:none; color:var(--text-2);
  padding:6px 12px; border-radius:6px; cursor:pointer;
}
.seg button[aria-pressed="true"]{background:var(--surface); color:var(--text); box-shadow:0 1px 2px rgba(0,0,0,.12)}
.btn{
  font-family:var(--disp); font-weight:700; font-size:15px; border:1px solid var(--line);
  background:var(--surface); color:var(--text); padding:12px 22px; border-radius:8px; cursor:pointer;
  transition:background .15s,border-color .15s,transform .1s;
}
.btn{min-height:46px}
.seg button,.grade,.recall-filter button,.errtax-btn,.conf-btn,.tree-opt,.case-opt,.navcell,.ordbtns button,.matchrow select{min-height:40px}
.btn:hover{border-color:var(--text-3)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#fff}
:root[data-theme="dark"] .btn.primary,
:root:not([data-theme="light"]) .btn.primary{color:#0D1D14}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .btn.primary{color:#fff}}
.btn.primary:hover{filter:brightness(1.07)}
.btn:disabled{opacity:.45; cursor:not-allowed}
.btn.ghost{background:none}
.startbar{margin-top:24px; display:flex; gap:12px; align-items:center; flex-wrap:wrap}
.resume-note{font-size:13.5px; color:var(--text-3); font-family:var(--disp)}

/* exam bar */
.exambar{
  position:sticky; top:60px; z-index:50; background:var(--surface); border-bottom:1px solid var(--line);
  margin:0 -22px 0; padding:0 22px;
}
.exambar-in{display:flex; align-items:center; gap:18px; height:58px; max-width:1196px; margin:0 auto; flex-wrap:nowrap}
.timer{display:flex; align-items:center; gap:9px}
.timer svg{display:block; flex:none}
.timer .t{font-family:var(--mono); font-size:17px; font-weight:600; font-variant-numeric:tabular-nums; letter-spacing:-.02em}
.timer.warn .t{color:var(--bad)}
.exambar .prog{flex:1; min-width:60px; height:4px; background:var(--surface-2); border-radius:3px; overflow:hidden}
.exambar .prog i{display:block; height:100%; background:var(--accent); border-radius:3px; transition:width .25s}
.exambar .count{font-family:var(--mono); font-size:12px; color:var(--text-3); white-space:nowrap}
.exambar .spacer{flex:none}

.qlayout{display:grid; grid-template-columns:minmax(0,1fr) 224px; gap:36px; align-items:start; padding-top:26px}
.qcard{background:var(--surface); border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--shadow); padding:26px 30px 24px; min-width:0}
.qmeta{display:flex; align-items:center; gap:9px; flex-wrap:wrap; margin-bottom:14px}
.chip{
  font-family:var(--mono); font-size:10px; font-weight:600; letter-spacing:.1em; text-transform:uppercase;
  padding:3px 7px; border-radius:4px; background:var(--surface-2); color:var(--text-2); white-space:nowrap;
}
.chip.type{background:var(--accent-soft); color:var(--accent-2)}
.chip.flagged{background:var(--flag-soft); color:var(--flag)}
.qnum{font-family:var(--mono); font-size:12px; font-weight:600; color:var(--text-3); margin-right:auto}
.scenario{
  border-left:3px solid var(--line); padding:2px 0 2px 15px; margin:0 0 16px; color:var(--text-2);
  font-size:15.5px;
}
.scenario .eyebrow{display:block; margin-bottom:4px}
.stem{font-size:19px; line-height:1.62; color:var(--text)}
.instr{font-family:var(--mono); font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--accent-2); margin-top:10px; font-weight:600}

.opts{margin-top:18px; display:flex; flex-direction:column; gap:9px}
.opt{
  display:flex; gap:13px; align-items:flex-start; padding:12px 15px; border:1px solid var(--line);
  border-radius:9px; cursor:pointer; background:var(--surface); transition:border-color .13s, background .13s;
  font-size:15.5px; line-height:1.5; position:relative;
}
.opt:hover{border-color:var(--text-3); background:var(--surface-2)}
.opt input{position:absolute; opacity:0; width:1px; height:1px}
.opt:has(input:focus-visible){outline:3px solid var(--focus); outline-offset:2px}
.opt .key{
  font-family:var(--mono); font-size:12px; font-weight:600; width:23px; height:23px; flex:none;
  border:1px solid var(--line); border-radius:5px; display:grid; place-items:center; color:var(--text-2);
  background:var(--surface); margin-top:1px;
}
.opt.sel{border-color:var(--accent); background:var(--accent-soft)}
.opt.sel .key{background:var(--accent); border-color:var(--accent); color:#fff}
:root[data-theme="dark"] .opt.sel .key{color:#1A1206}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .opt.sel .key{color:#1A1206}}
.opt.locked{cursor:default}
.opt.locked:hover{border-color:var(--line); background:var(--surface)}
.opt.correct{border-color:var(--ok); background:var(--ok-soft)}
.opt.correct .key{background:var(--ok); border-color:var(--ok); color:#fff}
.opt.wrong{border-color:var(--bad); background:var(--bad-soft)}
.opt.wrong .key{background:var(--bad); border-color:var(--bad); color:#fff}
.choice-fieldset{border:0; margin:18px 0 0; padding:0}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0}
.selection-status{margin:10px 0 0; color:var(--text-2); font-family:var(--disp); font-size:13px}
.selection-status.limit{color:var(--bad); font-weight:600}

/* ordering */
.ordwrap{margin-top:18px; display:grid; grid-template-columns:1fr; gap:9px}
.orditem{
  display:flex; gap:12px; align-items:center; padding:11px 14px; border:1px solid var(--line);
  border-radius:9px; background:var(--surface); font-size:15px;
}
.orditem .pos{
  font-family:var(--mono); font-size:12px; font-weight:600; width:24px; height:24px; flex:none;
  border-radius:5px; display:grid; place-items:center; background:var(--surface-2); color:var(--text-2);
}
.orditem .txt{flex:1; min-width:0}
.ordbtns{display:flex; gap:4px; flex:none}
.ordbtns button{
  width:26px; height:26px; border:1px solid var(--line); background:var(--surface); border-radius:6px;
  cursor:pointer; color:var(--text-2); font-size:11px; line-height:1; display:grid; place-items:center;
}
.ordbtns button:hover:not(:disabled){border-color:var(--text-3); color:var(--text)}
.ordbtns button:disabled{opacity:.3; cursor:not-allowed}
.orditem.correct{border-color:var(--ok); background:var(--ok-soft)}
.orditem.correct .pos{background:var(--ok); color:#fff}
.orditem.wrong{border-color:var(--bad); background:var(--bad-soft)}
.orditem.wrong .pos{background:var(--bad); color:#fff}

/* matching */
.matchwrap{margin-top:18px; display:flex; flex-direction:column; gap:9px}
.matchrow{
  display:grid; grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr); gap:13px; align-items:center;
  padding:11px 14px; border:1px solid var(--line); border-radius:9px; background:var(--surface);
}
.matchrow .prompt{font-size:15px; line-height:1.45}
.matchrow select{
  font-family:var(--disp); font-size:13.5px; padding:8px 9px; border-radius:7px; border:1px solid var(--line);
  background:var(--surface-2); color:var(--text); width:100%; cursor:pointer;
}
.matchrow.correct{border-color:var(--ok); background:var(--ok-soft)}
.matchrow.wrong{border-color:var(--bad); background:var(--bad-soft)}
.matchrow .truth{font-family:var(--mono); font-size:11px; color:var(--ok); margin-top:5px; display:block}

.qfoot{display:flex; align-items:center; gap:10px; margin-top:22px; padding-top:18px; border-top:1px solid var(--line-soft); flex-wrap:wrap}
.qfoot .grow{flex:1}

/* explanation */
.explain{margin-top:20px; border-top:1px solid var(--line-soft); padding-top:18px}
.verdict{display:flex; align-items:center; gap:9px; font-family:var(--disp); font-weight:600; font-size:15px; margin-bottom:12px}
.verdict .dot{width:9px; height:9px; border-radius:50%; flex:none}
.verdict.good{color:var(--ok)} .verdict.good .dot{background:var(--ok)}
.verdict.bad{color:var(--bad)} .verdict.bad .dot{background:var(--bad)}
.explain .why{background:var(--surface-2); border-radius:9px; padding:13px 16px; font-size:15px; color:var(--text)}
.optnotes{margin-top:14px; display:flex; flex-direction:column; gap:8px}
.optnote{display:flex; gap:11px; font-size:14.5px; line-height:1.5; color:var(--text-2)}
.optnote .k{
  font-family:var(--mono); font-size:11px; font-weight:600; flex:none; width:21px; height:21px;
  border-radius:5px; display:grid; place-items:center; margin-top:2px;
  background:var(--bad-soft); color:var(--bad);
}
.optnote.is-right .k{background:var(--ok-soft); color:var(--ok)}

/* navigator */
.nav{position:sticky; top:130px; display:flex; flex-direction:column; gap:12px}
.navgrid{display:grid; grid-template-columns:repeat(6,1fr); gap:5px}
.navcell{
  aspect-ratio:1; border:1px dashed var(--text-3); border-radius:6px; background:var(--ground);
  font-family:var(--mono); font-size:11px; font-weight:500; color:var(--text-3); cursor:pointer;
  display:grid; place-items:center; position:relative; padding:0;
  transition:border-color .12s, background .12s;
}
.navcell:hover{border-color:var(--text-3)}
.navcell.answered{background:var(--ok-soft); color:var(--ok); border:1px solid var(--ok); font-weight:700}
.navcell.answered::before{
  content:""; position:absolute; bottom:7px; width:7px; height:4px; border-left:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor; transform:rotate(-45deg);
}
.navcell.flagged::after{
  content:""; position:absolute; top:0; right:0; border-width:0 7px 7px 0; border-style:solid;
  border-color:transparent var(--flag) transparent transparent; border-radius:0 6px 0 0;
}
.navcell.cur{border-color:var(--accent); box-shadow:0 0 0 2px var(--accent-soft); color:var(--text); font-weight:600}
.navcell.rw{background:var(--ok-soft); border-color:var(--ok); color:var(--ok)}
.navcell.rx{background:var(--bad-soft); border-color:var(--bad); color:var(--bad)}
.navlegend{display:flex; flex-wrap:wrap; gap:9px; font-family:var(--mono); font-size:10px; color:var(--text-3)}
.navlegend span{display:flex; align-items:center; gap:5px}
.navlegend i{width:10px; height:10px; border-radius:3px; display:block}
.navlegend .key-answered{background:var(--ok-soft); border:1px solid var(--ok)}
.navlegend .key-flagged{background:var(--flag); border:1px solid var(--flag)}
.navlegend .key-skipped{background:var(--ground); border:1px dashed var(--text-3)}

/* results */
.results{max-width:var(--content-max); margin:0 auto; padding-top:34px}
.scorecard{
  border:1px solid var(--line); border-radius:var(--r); background:var(--surface); box-shadow:var(--shadow);
  padding:30px 32px; display:grid; grid-template-columns:auto minmax(0,1fr); gap:34px; align-items:center;
}
.dial{position:relative; width:150px; height:150px; flex:none}
.dial svg{transform:rotate(-90deg)}
.dial .mid{position:absolute; inset:0; display:grid; place-items:center; text-align:center}
.dial .mid b{font-family:var(--disp); font-size:38px; font-weight:700; line-height:1; letter-spacing:-.03em}
.dial .mid span{font-family:var(--mono); font-size:10px; letter-spacing:.12em; text-transform:uppercase; color:var(--text-3); display:block; margin-top:5px}
.verdictbig{font-family:var(--disp); font-size:26px; font-weight:700}
.verdictbig.pass{color:var(--ok)} .verdictbig.fail{color:var(--bad)}
.scorecard .sub{color:var(--text-2); margin-top:8px; font-size:15px}
.scorestats{display:flex; gap:26px; margin-top:18px; flex-wrap:wrap}
.scorestats div{}
.scorestats dt{font-family:var(--mono); font-size:10px; letter-spacing:.11em; text-transform:uppercase; color:var(--text-3)}
.scorestats dd{margin:3px 0 0; font-family:var(--disp); font-weight:600; font-size:20px; font-variant-numeric:tabular-nums}

.dombars{margin-top:28px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface); overflow:hidden}
.dombars h3{padding:15px 20px 0; font-size:15px; font-weight:600}
.dombar{padding:13px 20px; border-bottom:1px solid var(--line-soft)}
.dombar:last-child{border-bottom:0}
.dombar .r1{display:flex; align-items:baseline; gap:10px; font-family:var(--disp); font-size:14px}
.dombar .r1 .nm{font-weight:600; flex:1; min-width:0}
.dombar .r1 .fr{font-family:var(--mono); font-size:12px; color:var(--text-3); font-variant-numeric:tabular-nums}
.dombar .r1 .pc{font-family:var(--mono); font-size:13px; font-weight:600; width:44px; text-align:right; font-variant-numeric:tabular-nums}
.dombar .track{height:7px; background:var(--surface-2); border-radius:4px; margin-top:8px; overflow:hidden; position:relative}
.dombar .track i{display:block; height:100%; border-radius:4px; transition:width .5s ease}
.dombar .track .mark{position:absolute; top:-2px; bottom:-2px; width:1px; background:var(--text-3); left:70%}

.reviewbar{display:flex; align-items:center; gap:10px; margin:32px 0 14px; flex-wrap:wrap}
.reviewbar h3{font-size:18px; font-weight:700; margin-right:auto}
.rev{display:flex; flex-direction:column; gap:14px}
.revq{border:1px solid var(--line); border-radius:var(--r); background:var(--surface); padding:20px 24px}

/* recall lab */
.recall-wrap{max-width:var(--content-max); margin:0 auto; padding:44px 22px 90px}
.recall-hero h1{font-size:clamp(29px,4.4vw,42px); font-weight:700}
.recall-hero p{margin-top:15px; color:var(--text-2); font-size:18px; line-height:1.68}
.recall-shell{margin-top:28px; display:grid; grid-template-columns:minmax(0,1fr) 238px; gap:28px; align-items:start}
.recall-main{min-width:0}
.recall-domain{margin:25px 0 18px; padding:14px 16px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface)}
.recall-domain .row{display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.recall-domain .seg{margin-left:auto}
.recall-domain-note{margin-top:9px; color:var(--text-2); font-size:14px}
.recall-filter{display:flex; gap:5px; flex-wrap:wrap; margin-bottom:14px}
.recall-filter button{font-family:var(--disp); font-size:12.5px; font-weight:600; color:var(--text-2); border:1px solid var(--line); border-radius:20px; padding:6px 10px; background:var(--surface); cursor:pointer}
.recall-filter button[aria-pressed="true"]{background:var(--accent-soft); border-color:var(--accent); color:var(--accent-2)}
.recall-card{background:var(--surface); border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--shadow); overflow:hidden}
.recall-card-head{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:16px 18px 0}
.recall-card-head .root{font-family:var(--mono); color:var(--accent-2); background:var(--accent-soft); border-radius:4px; padding:3px 7px; font-size:10.5px; font-weight:600; letter-spacing:.06em; text-transform:uppercase}
.recall-card-head .count{font-family:var(--mono); color:var(--text-3); font-size:11.5px; white-space:nowrap}
.recall-face{padding:23px 22px 25px; min-height:285px; display:flex; flex-direction:column; align-items:flex-start}
.recall-face .eyebrow{margin-bottom:10px}
.recall-prompt{font-family:var(--disp); color:var(--text); font-weight:600; font-size:23px; line-height:1.32; letter-spacing:-.02em; max-width:29ch}
.recall-cue{margin-top:auto; padding-top:26px; color:var(--text-3); font-size:14px}
.recall-answer{margin-top:19px; padding:15px 16px; border-radius:8px; background:var(--surface-2); color:var(--text); font-size:16px; line-height:1.55; width:100%}
.recall-answer strong{font-family:var(--disp)}
.recall-cue strong{color:var(--text-2)}
.recall-foot{border-top:1px solid var(--line-soft); padding:14px 18px; display:flex; align-items:center; gap:9px; flex-wrap:wrap}
.recall-foot .grow{flex:1}
.grade{font-family:var(--disp); font-size:13px; font-weight:600; border:1px solid var(--line); background:var(--surface); color:var(--text); border-radius:7px; padding:8px 11px; cursor:pointer}
.grade:hover{border-color:var(--text-3)}
.grade.again{color:var(--bad); border-color:var(--bad)}
.grade.hard{color:var(--accent-2); border-color:var(--accent)}
.grade.good{color:var(--ok); border-color:var(--ok)}
.recall-empty{border:1px solid var(--line); border-radius:var(--r); background:var(--surface); padding:30px 26px; min-height:285px}
.recall-empty h2{font-size:22px}
.recall-empty p{margin-top:9px; color:var(--text-2)}
.recall-side{border:1px solid var(--line); border-radius:var(--r); background:var(--surface); overflow:hidden}
.recall-side section{padding:16px 17px; border-bottom:1px solid var(--line-soft)}
.recall-side section:last-child{border-bottom:0}
.recall-side h2{font-size:15px; font-weight:600}
.recall-stats{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:13px}
.recall-stats dt{font-family:var(--mono); color:var(--text-3); font-size:10px; letter-spacing:.08em; text-transform:uppercase}
.recall-stats dd{margin:2px 0 0; font-family:var(--disp); font-size:21px; font-weight:700}
.recall-side p{margin-top:8px; color:var(--text-2); font-size:13.5px; line-height:1.5}
.coverage-list{display:flex; flex-direction:column; gap:12px; margin-top:12px}
.coverage-row{font-family:var(--disp); font-size:12.5px}
.coverage-title{display:flex; align-items:baseline; gap:7px; min-width:0}
.coverage-code{flex:none; font-family:var(--mono); font-size:10.5px; font-weight:700; color:var(--text-3)}
.coverage-row .nm{min-width:0; font-weight:650; color:var(--text); line-height:1.4}
.coverage-meta{display:flex; flex-wrap:wrap; gap:10px; margin-top:4px; padding-left:27px}
.coverage-row .ct{font-family:var(--mono); color:var(--text-3); font-size:10.5px; white-space:nowrap}
.coverage-row .ct b{color:var(--text-2); font-weight:700}
.coverage-row.active .nm,.coverage-row.active .coverage-code{color:var(--accent-2)}
.store-actions{display:flex; gap:7px; flex-wrap:wrap; margin-top:12px}
.store-actions .btn{font-size:12.5px; padding:7px 10px}
.store-actions .danger{color:var(--bad)}
.recall-notice{font-family:var(--disp); font-size:12.5px; color:var(--text-3); margin-top:10px}

.overlay{
  position:fixed; inset:0; z-index:100; background:rgba(10,16,22,.55);
  display:grid; place-items:center; padding:22px; backdrop-filter:blur(2px);
}
.dialog{
  background:var(--surface); border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow-lift);
  padding:26px 28px; max-width:480px; width:100%;
}
.dialog:focus{outline:3px solid var(--focus); outline-offset:3px}
.dialog h3{font-size:19px; font-weight:700}
.dialog p{margin-top:10px; color:var(--text-2); font-size:15px}
.dlgbtns{display:flex; gap:9px; margin-top:20px; flex-wrap:wrap; justify-content:flex-end}
.dlgbtns .btn{font-size:13.5px; padding:9px 15px}

.footer{max-width:1240px; margin:0 auto; padding:34px 22px 60px; border-top:1px solid var(--line); color:var(--text-3); font-size:13.5px; font-family:var(--disp)}
.footer a{color:var(--text-2)}

@media (max-width:1000px){
  .study-wrap{grid-template-columns:1fr; gap:0}
  .rail{position:static; flex-direction:row; overflow-x:auto; gap:8px; padding:14px 0 6px; border-bottom:1px solid var(--line)}
  .rail .rail-h,.rail .wbar{display:none}
  .rail a{
    white-space:nowrap; grid-template-columns:auto auto auto; column-gap:7px;
    padding:6px 10px; background:var(--surface-2);
  }
  @media (min-width:1001px){
    :root[data-text-size="xxx-large"] .recall-shell,
    :root[data-text-size="huge"] .recall-shell,
    :root[data-text-size="x-huge"] .recall-shell,
    :root[data-text-size="xx-huge"] .recall-shell{grid-template-columns:1fr}
  }
  .rail a.on{background:var(--accent-soft)}
  .rail a.ref .n{display:none}
  .rail a.ref{grid-template-columns:auto}
  .qlayout{grid-template-columns:1fr; gap:24px}
  .nav{position:static}
  .navgrid{grid-template-columns:repeat(10,1fr)}
  .scorecard{grid-template-columns:1fr; justify-items:center; text-align:center; gap:22px}
  .scorestats{justify-content:center}
  .recall-shell{grid-template-columns:1fr}
}
@media (max-width:640px){
  body{font-size:17px; line-height:1.68; padding-bottom:76px}
  .qcard{padding:20px 18px}
  .topbar-in{height:58px; padding:0 14px}
  .brand-sub{display:none}
  .brand{gap:7px}
  .brand-mark{padding:7px 8px 6px; font-size:16px}
  .brand-code{font-size:13px}
  .tabs{display:none}
  .display-menu{margin-left:auto}
  .display-menu summary{height:44px; padding:0 13px}
  .display-panel{right:0; width:252px}
  .display-panel button{min-height:44px}
  .display-row{align-items:stretch; flex-direction:column}
  .display-stepper,.theme-options{justify-content:space-between}
  .display-stepper button,.theme-options button{flex:1}
  .mobile-nav{
    position:fixed; right:0; bottom:0; left:0; z-index:70; display:grid;
    grid-template-columns:repeat(5,1fr); gap:1px; padding:7px 8px calc(7px + env(safe-area-inset-bottom));
    background:var(--surface); border-top:1px solid var(--line);
  }
  .mobile-nav button{
    min-width:0; min-height:44px; border:0; border-radius:7px; background:transparent; color:var(--text-2);
    font-family:var(--disp); font-size:11px; font-weight:700; line-height:1.1; cursor:pointer;
  }
  .mobile-nav button[aria-current="page"]{background:var(--accent-soft); color:var(--accent-2)}
  .today-wrap{padding:34px 14px 36px}
  .today-grid{grid-template-columns:1fr; margin-top:24px}
  .today-card{padding:20px 18px}
  .certification-brief{margin-top:22px}
  .certification-facts{grid-template-columns:1fr 1fr}
  .exambar-in{gap:12px}
  .exambar .prog{display:none}
  .hero,.study-wrap,.exam-wrap,.footer{padding-left:14px; padding-right:14px}
  .exambar{margin:0 -14px; padding:0 14px}
  .matchrow{grid-template-columns:1fr; gap:8px}
  .navgrid{grid-template-columns:repeat(7,1fr)}
  .recall-wrap{padding-left:14px; padding-right:14px}
  .recall-domain .seg{margin-left:0}
  .recall-face{min-height:300px; padding:20px 18px}
  .recall-prompt{font-size:20px}
  .btn,.seg button,.grade,.recall-filter button,.errtax-btn,.conf-btn,.tree-opt,.case-opt,.navcell,.ordbtns button,.matchrow select{min-height:44px}
  .ordbtns button{width:44px; height:44px}
  .tblwrap{position:relative; padding-bottom:28px}
  .tblwrap::after{
    content:"Swipe sideways to compare all columns";
    position:absolute; bottom:7px; left:12px; color:var(--text-3); font-family:var(--disp); font-size:12px; font-weight:600;
  }
}
@media (max-width:1120px) and (min-width:641px){
  .brand-sub{display:none}
  .topbar-in{gap:10px}
  .tab{padding-left:11px; padding-right:11px}
}
@media (min-width:641px) and (max-width:700px){
  body{padding-bottom:76px}
  .tabs{display:none}
  .mobile-nav{
    position:fixed; right:0; bottom:0; left:0; z-index:70; display:grid;
    grid-template-columns:repeat(5,1fr); gap:1px; padding:7px 12px calc(7px + env(safe-area-inset-bottom));
    background:var(--surface); border-top:1px solid var(--line);
  }
  .mobile-nav button{
    min-width:0; min-height:44px; border:0; border-radius:7px; background:transparent; color:var(--text-2);
    font-family:var(--disp); font-size:12px; font-weight:700; cursor:pointer;
  }
  .mobile-nav button[aria-current="page"]{background:var(--accent-soft); color:var(--accent-2)}
}
@media (max-width:700px){
  body.exam-active{padding-bottom:0}
  .exam-active .mobile-nav{display:none}
}
@media (max-width:380px){
  .navgrid{grid-template-columns:repeat(5,1fr)}
}

/* practice-exam form tag + per-form attempt history */
.form-label{color:var(--accent-2); margin-bottom:6px; letter-spacing:.12em}
.formtag{color:var(--text-3)}
.history{margin-top:30px}
.hist-empty{border:1px dashed var(--line); border-radius:var(--r); background:var(--surface); padding:16px 18px; color:var(--text-3); font-family:var(--disp); font-size:13.5px}
.hist-head h3{font-size:16px; font-weight:700; font-family:var(--disp)}
.hist-sub{color:var(--text-3); font-family:var(--disp); font-size:13px; margin-top:4px; max-width:72ch}
.hist-form{margin-top:16px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface); overflow:hidden}
.hist-form-top{display:flex; align-items:center; gap:12px; padding:12px 16px; border-bottom:1px solid var(--line-soft); flex-wrap:wrap}
.hist-name{font-family:var(--disp); font-weight:700; font-size:15px}
.hist-meta{font-family:var(--mono); font-size:12px; color:var(--text-3)}
.hist-resume{margin-left:auto; font-size:12.5px; padding:6px 12px}
.hist-list{list-style:none; margin:0; padding:0}
.hist-item{display:flex; align-items:baseline; gap:14px; padding:10px 16px; border-bottom:1px solid var(--line-soft); font-family:var(--disp); font-size:13px; flex-wrap:wrap}
.hist-item:last-child{border-bottom:0}
.hist-item .hi-date{font-family:var(--mono); font-size:12px; color:var(--text-3); min-width:96px}
.hist-item .hi-scope{font-family:var(--mono); font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--text-3); min-width:66px}
.hist-item .hi-score{font-weight:600; font-variant-numeric:tabular-nums}
.hist-item .hi-verdict{font-family:var(--mono); font-size:11px; padding:1px 8px; border-radius:20px}
.hist-item.pass .hi-verdict{background:var(--ok-soft); color:var(--ok)}
.hist-item.fail .hi-verdict{background:var(--bad-soft); color:var(--bad)}
.hist-item .hi-time{font-family:var(--mono); font-size:12px; color:var(--text-3)}
.hist-item .hi-dom{flex:1 1 100%; color:var(--text-3); font-size:12px; font-family:var(--mono)}
.hist-none, .hist-more{padding:10px 16px; color:var(--text-3); font-family:var(--disp); font-size:12.5px}

/* ============================================================
   Adaptive learning layer — confidence, calibration, error
   taxonomy, mastery map, decision trees, case lab, teach-back
   ============================================================ */

/* --- confidence selector on each live question --- */
.confbox{margin-top:18px; padding-top:16px; border-top:1px dashed var(--line-soft)}
.conf-label{display:block; font-family:var(--disp); font-size:13px; font-weight:600; color:var(--text-2); margin-bottom:8px}
.conf-label em{font-style:normal; font-weight:400; color:var(--text-3)}
.conf-seg{display:inline-flex; gap:2px; background:var(--surface-2); padding:3px; border-radius:8px; flex-wrap:wrap; max-width:100%}
.conf-btn{
  font-family:var(--disp); font-weight:600; font-size:12.5px; border:0; background:none; color:var(--text-2);
  padding:7px 14px; border-radius:6px; cursor:pointer; transition:background .15s,color .15s;
}
.conf-btn:hover{color:var(--text)}
.conf-btn.on{background:var(--surface); color:var(--text); box-shadow:0 1px 2px rgba(0,0,0,.14)}
.conf-btn.on.c-guess{color:var(--text-2)}
.conf-btn.on.c-unsure{color:var(--accent-2)}
.conf-btn.on.c-confident{color:var(--ok)}

/* --- confidence + task chips in review --- */
.chip.task{background:var(--flag-soft); color:var(--flag); font-family:var(--mono)}
.chip.conf{background:var(--surface-2); color:var(--text-2)}
.chip.conf.c-guess{background:var(--surface-2); color:var(--text-3)}
.chip.conf.c-unsure{background:var(--accent-soft); color:var(--accent-2)}
.chip.conf.c-confident{background:var(--ok-soft); color:var(--ok)}
.chip.conf.none{background:transparent; color:var(--text-3); border:1px dashed var(--line)}
.chip.himiss{background:var(--bad-soft); color:var(--bad)}

/* --- error taxonomy control in review --- */
.errtax{margin-top:16px; padding-top:14px; border-top:1px dashed var(--line-soft)}
.errtax-h{font-family:var(--disp); font-size:12.5px; color:var(--text-2); margin-bottom:9px}
.errtax-h .eyebrow{display:inline; margin-right:6px}
.errtax-h em{font-style:normal; color:var(--text-3)}
.errtax-btns{display:flex; gap:7px; flex-wrap:wrap}
.errtax-btn{
  font-family:var(--disp); font-weight:600; font-size:12px; border:1px solid var(--line);
  background:var(--surface); color:var(--text-2); padding:6px 11px; border-radius:20px; cursor:pointer;
  transition:border-color .15s,background .15s,color .15s;
}
.errtax-btn:hover{border-color:var(--text-3); color:var(--text)}
.errtax-btn.on{background:var(--accent-soft); border-color:var(--accent); color:var(--accent-2)}
.errtax-btn.clear{border-style:dashed; color:var(--text-3)}

/* --- confidence calibration block --- */
.calib{margin:28px 0 4px; padding:20px 22px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface); box-shadow:var(--shadow)}
.calib h3{font-size:16px; font-weight:700; font-family:var(--disp)}
.calib-sub{margin-top:6px; color:var(--text-2); font-family:var(--disp); font-size:13.5px; max-width:74ch}
.cal-rows{margin-top:15px; display:flex; flex-direction:column; gap:10px}
.cal-row{display:grid; grid-template-columns:120px minmax(0,1fr) 108px; gap:12px; align-items:center}
.cal-nm{font-family:var(--disp); font-weight:600; font-size:13.5px}
.cal-track{height:9px; background:var(--surface-2); border-radius:6px; overflow:hidden}
.cal-track i{display:block; height:100%; border-radius:6px; transition:width .3s}
.cal-fr{font-family:var(--mono); font-size:12.5px; color:var(--text-2); text-align:right; font-variant-numeric:tabular-nums}
.calib-insight{margin-top:14px; font-family:var(--disp); font-size:13.5px; color:var(--text-2); line-height:1.5}
.calib-insight.warn{color:var(--bad)}

/* --- drill banner on results --- */
.drill-banner{
  margin-bottom:22px; padding:14px 18px; border:1px solid var(--flag);
  border-radius:var(--r); background:var(--flag-soft);
}
.drill-banner .eyebrow{color:var(--flag)}
.drill-banner p{margin-top:5px; font-family:var(--disp); font-size:13.5px; color:var(--text-2); line-height:1.5}

/* --- mastery view shell --- */
.mastery-wrap{max-width:var(--content-max); margin:0 auto; padding:44px 22px 90px}
.mastery-hero h1{font-size:clamp(29px,4.4vw,42px); font-weight:700; margin-top:6px}
.mastery-hero p{margin-top:15px; color:var(--text-2); font-size:18px; line-height:1.68}
#mastery-app{margin-top:26px; display:flex; flex-direction:column; gap:22px}
.m-sec{background:var(--surface); border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--shadow); padding:22px 24px}
.m-sec-h h2{font-size:18.5px; font-weight:700; font-family:var(--disp)}
.m-sec-h p{margin-top:6px; color:var(--text-2); font-family:var(--disp); font-size:13.5px; line-height:1.5; max-width:88ch}
.m-note{margin-top:14px; font-family:var(--disp); font-size:12.5px; color:var(--text-3); line-height:1.5}
.m-empty{padding:20px; text-align:center; color:var(--text-3); font-family:var(--disp); font-size:13.5px}
.m-sec .startbar{margin-top:18px}
.m-disclosure{border:1px solid var(--line); border-radius:var(--r); background:var(--surface); box-shadow:var(--shadow)}
.m-disclosure summary{padding:19px 22px; cursor:pointer; list-style:none}
.m-disclosure summary::-webkit-details-marker{display:none}
.m-disclosure summary::after{content:"+"; float:right; color:var(--accent-2); font-family:var(--disp); font-size:22px; line-height:.8}
.m-disclosure[open] summary{border-bottom:1px solid var(--line-soft)}
.m-disclosure[open] summary::after{content:"−"}
.m-disclosure summary h2{display:inline; font-family:var(--disp); font-size:18px}
.m-disclosure summary p{display:inline; margin-left:9px; color:var(--text-2); font-family:var(--disp); font-size:13.5px; line-height:1.5}
.m-disclosure-body{padding:20px 22px}
.m-disclosure-body .m-sec{box-shadow:none}

/* --- state badges --- */
.st-badge{
  font-family:var(--mono); font-size:10px; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  padding:3px 8px; border-radius:20px; white-space:nowrap; vertical-align:middle;
}
.st-unseen{background:var(--surface-2); color:var(--text-3)}
.st-learning{background:var(--accent-soft); color:var(--accent-2)}
.st-shaky{background:var(--bad-soft); color:var(--bad)}
.st-stable{background:var(--ok-soft); color:var(--ok)}

/* --- readiness gate --- */
.gate-verdict{margin-top:14px; padding:13px 16px; border-radius:8px; font-family:var(--disp); font-size:14px; line-height:1.5; border:1px solid var(--line)}
.gate-verdict.ready{background:var(--ok-soft); border-color:var(--ok); color:var(--ok)}
.gate-verdict.none{background:var(--surface-2); color:var(--text-2)}
.gate-verdict.notready{background:var(--bad-soft); border-color:var(--bad); color:var(--bad)}
.gate-rows{margin-top:16px; display:flex; flex-direction:column; gap:2px}
.gate-row{display:flex; gap:12px; align-items:flex-start; padding:12px 4px; border-top:1px solid var(--line-soft)}
.gate-row:first-child{border-top:0}
.gate-mark{
  flex:none; width:24px; height:24px; border-radius:50%; display:grid; place-items:center;
  font-family:var(--disp); font-weight:700; font-size:13px; margin-top:1px;
}
.gate-row.met .gate-mark{background:var(--ok-soft); color:var(--ok)}
.gate-row.insuff .gate-mark{background:var(--accent-soft); color:var(--accent-2)}
.gate-row.unmet .gate-mark{background:var(--bad-soft); color:var(--bad)}
.gate-title{font-family:var(--disp); font-weight:600; font-size:14.5px}
.gate-detail{margin-top:3px; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.5}
.insuff-text{color:var(--accent-2)}

/* --- today's focus drill --- */
.focus-why{margin-top:12px; font-family:var(--disp); font-size:14.5px; color:var(--text); line-height:1.55}
.focus-detail{margin-top:9px; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.55; max-width:88ch}

/* --- task mastery map --- */
.task-list{margin-top:16px; display:flex; flex-direction:column; gap:10px}
.task-row{
  display:grid; grid-template-columns:minmax(0,1fr) 128px; gap:16px; align-items:stretch;
  border:1px solid var(--line); border-radius:9px; background:var(--raise); padding:14px 16px;
}
.task-id{font-family:var(--mono); font-size:12px; font-weight:600; color:var(--text-3); display:flex; align-items:center; gap:8px; margin-bottom:5px}
.task-dom{background:var(--surface-2); color:var(--text-2); padding:1px 7px; border-radius:4px; font-size:10.5px; letter-spacing:.05em}
.task-name{font-family:var(--disp); font-weight:700; font-size:15.5px; display:flex; align-items:center; gap:9px; flex-wrap:wrap}
.task-hint{margin-top:3px; font-family:var(--disp); font-size:12.5px; color:var(--text-3); line-height:1.45}
.task-rec{margin-top:9px; font-family:var(--disp); font-size:12.5px; color:var(--text-2); line-height:1.5}
.task-rec-lbl{font-weight:700; color:var(--text); text-transform:uppercase; letter-spacing:.06em; font-size:11px; margin-right:4px}
.task-stats{
  border-left:1px solid var(--line-soft); padding-left:16px; display:flex; flex-direction:column;
  justify-content:center; align-items:flex-end; text-align:right; gap:2px;
}
.ts-num{font-family:var(--disp); font-weight:700; font-size:22px; font-variant-numeric:tabular-nums}
.ts-lbl{font-family:var(--mono); font-size:11px; color:var(--text-3)}
.ts-cov{font-family:var(--mono); font-size:10.5px; color:var(--text-3); margin-top:3px}

/* --- concept-family scorecards --- */
.cf-filters{margin-top:14px; display:flex; gap:10px; flex-wrap:wrap}
.cf-grid{margin-top:16px; display:grid; grid-template-columns:repeat(auto-fill,minmax(232px,1fr)); gap:12px}
.cf-card{border:1px solid var(--line); border-radius:9px; background:var(--raise); padding:13px 15px}
.cf-top{display:flex; align-items:center; justify-content:space-between; gap:8px}
.cf-name{font-family:var(--disp); font-weight:700; font-size:14px}
.cf-doms{margin-top:7px; font-family:var(--mono); font-size:10.5px; color:var(--text-3); display:flex; align-items:center; gap:5px; flex-wrap:wrap}
.cf-dom{background:var(--surface-2); color:var(--text-2); padding:1px 6px; border-radius:4px}
.cf-track{margin-top:10px; height:7px; background:var(--surface-2); border-radius:5px; overflow:hidden}
.cf-track i{display:block; height:100%; border-radius:5px; transition:width .3s}
.cf-nums{margin-top:8px; font-family:var(--mono); font-size:11.5px; color:var(--text-2)}
.cf-tags{margin-top:8px; display:flex; gap:5px; flex-wrap:wrap}
.cf-tag{font-family:var(--mono); font-size:10px; background:var(--surface-2); color:var(--text-2); padding:2px 7px; border-radius:4px}
.cf-more{font-family:var(--mono); font-size:10px; color:var(--text-3); padding:2px 4px}

/* --- error taxonomy rollup --- */
.tax-rows{margin-top:16px; display:flex; flex-direction:column; gap:9px}
.tax-row{display:grid; grid-template-columns:minmax(140px,220px) minmax(0,1fr) 40px; gap:12px; align-items:center}
.tax-nm{font-family:var(--disp); font-weight:600; font-size:13px}
.tax-track{height:9px; background:var(--surface-2); border-radius:6px; overflow:hidden}
.tax-track i{display:block; height:100%; background:var(--accent); border-radius:6px; transition:width .3s}
.tax-ct{font-family:var(--mono); font-size:12.5px; color:var(--text-2); text-align:right; font-variant-numeric:tabular-nums}

/* --- decision trees + case lab shared grids --- */
.tree-grid,.case-grid{margin-top:16px; display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:14px}
.tree,.case{border:1px solid var(--line); border-radius:10px; background:var(--raise); padding:16px 17px; display:flex; flex-direction:column}
.tree-head h4,.case-head h4{font-size:15.5px; font-weight:700; font-family:var(--disp); margin-top:4px}
.tree-trail{display:flex; align-items:center; gap:6px; flex-wrap:wrap; margin:11px 0 3px; font-family:var(--mono); font-size:10.5px; color:var(--text-3)}
.tree-trail span{background:var(--surface-2); padding:2px 7px; border-radius:4px}
.tree-trail b{color:var(--text-3)}
.tree-q,.case-q{margin-top:12px; font-family:var(--disp); font-weight:600; font-size:14.5px; line-height:1.45}
.tree-opts,.case-opts{margin-top:11px; display:flex; flex-direction:column; gap:7px}
.tree-opt,.case-opt{
  text-align:left; font-family:var(--disp); font-size:13.5px; border:1px solid var(--line);
  background:var(--surface); color:var(--text); padding:10px 13px; border-radius:8px; cursor:pointer;
  transition:border-color .15s,background .15s; line-height:1.4;
}
.tree-opt:hover,.case-opt:not(:disabled):hover{border-color:var(--accent); background:var(--accent-soft)}
.case-opt:disabled{cursor:default}
.case-opt.correct{border-color:var(--ok); background:var(--ok-soft)}
.case-opt.wrong{border-color:var(--bad); background:var(--bad-soft)}
.case-opt.dim{opacity:.55}
.tree-concl{margin-top:13px; padding:14px 15px; border:1px solid var(--line); border-radius:9px; background:var(--surface)}
.tree-badge{
  display:inline-block; font-family:var(--mono); font-size:10px; font-weight:600; letter-spacing:.09em;
  text-transform:uppercase; color:var(--accent-2); background:var(--accent-soft); padding:2px 8px; border-radius:20px;
}
.tree-answer{margin-top:9px; font-family:var(--disp); font-weight:700; font-size:16px}
.tree-why{margin-top:6px; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.5}
.tree-tag{margin-top:8px; font-family:var(--mono); font-size:11px; color:var(--text-3)}
.tree-foot,.case-progress{margin-top:auto}
.tree-foot{padding-top:13px}
.tree-foot .btn,.case .btn{font-size:12.5px; padding:7px 13px}

/* --- case lab specifics --- */
.case-progress{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:12px; font-family:var(--mono); font-size:11px; color:var(--text-3)}
.case-dots{display:flex; gap:5px}
.case-dots i{width:9px; height:9px; border-radius:50%; background:var(--surface-2)}
.case-dots i.done{background:var(--ok)}
.case-dots i.cur{background:var(--accent)}
.case-blurb{margin-top:10px; font-family:var(--disp); font-size:12.5px; color:var(--text-3); font-style:italic; line-height:1.45}
.case-fb{margin-top:11px; padding:12px 14px; border-radius:8px; font-family:var(--disp); font-size:13px; line-height:1.5}
.case-fb.good{background:var(--ok-soft); color:var(--text)}
.case-fb.bad{background:var(--bad-soft); color:var(--text)}
.case-fb strong{font-family:var(--disp)}
.case-fb-correct{display:block; margin-top:7px; color:var(--text-2); font-size:12.5px}
.case-fb + .tree-foot{margin-top:12px}
.case-wrap-up{margin-top:13px; padding:15px 16px; border:1px solid var(--ok); border-radius:9px; background:var(--ok-soft)}
.case-wrap-up p{margin-top:9px; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.55}
.case-score{margin-top:9px; font-family:var(--disp); font-weight:700; font-size:16px}

/* --- catalog review dashboard --- */
.catalog-summary{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; margin-top:17px}
.catalog-summary div{padding:12px 14px; border:1px solid var(--line); border-radius:8px; background:var(--raise)}
.catalog-summary span{display:block; font-family:var(--mono); font-size:10.5px; color:var(--text-3); text-transform:uppercase; letter-spacing:.06em}
.catalog-summary strong{display:block; margin-top:5px; font-family:var(--disp); font-size:22px}
.catalog-sources,.catalog-quality,.catalog-performance{margin-top:24px; padding-top:20px; border-top:1px solid var(--line-soft)}
.catalog-sources h3,.catalog-quality h3,.catalog-performance h3,.catalog-table h3{font-family:var(--disp); font-size:15px}
.catalog-sources ul{margin:10px 0 0; padding-left:20px; font-family:var(--disp); font-size:13px; line-height:1.7}
.catalog-sources span{font-family:var(--mono); font-size:10.5px; color:var(--text-3); text-transform:uppercase}
.catalog-coverage{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; margin-top:24px}
.catalog-table{min-width:0}
.catalog-table .tblwrap{margin-top:10px}
.catalog-table table,.catalog-performance table{width:100%; border-collapse:collapse; font-family:var(--disp); font-size:12.5px}
.catalog-table th,.catalog-table td,.catalog-performance th,.catalog-performance td{padding:8px 9px; border:1px solid var(--line-soft); text-align:left; vertical-align:top}
.catalog-table thead,.catalog-performance thead{background:var(--surface-2); font-family:var(--mono); font-size:10.5px; text-transform:uppercase; letter-spacing:.04em}
.catalog-quality>p,.catalog-performance>p{margin-top:7px; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.5}
.catalog-flag-grid{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; margin-top:14px}
.catalog-flag-grid>div{padding:13px 15px; border:1px solid var(--line); border-radius:8px; background:var(--raise)}
.catalog-flag-grid h4,.catalog-performance h4{font-family:var(--disp); font-size:13.5px}
.catalog-performance h4{margin-top:16px}
.catalog-flags{margin:8px 0 0; padding-left:18px; font-family:var(--mono); font-size:11.5px; color:var(--text-2); line-height:1.65}
.catalog-flags span{color:var(--text-3)}

/* --- teach-back on recall cards --- */
.teachback{margin-top:16px; padding-top:15px; border-top:1px dashed var(--line-soft)}
.tb-label{display:block; font-family:var(--disp); font-size:13px; color:var(--text-2); line-height:1.5; margin-bottom:8px}
.tb-label strong{color:var(--text)}
.tb-label em{font-style:normal; color:var(--text-3)}
.tb-input{
  width:100%; font-family:var(--body); font-size:15px; color:var(--text); background:var(--surface);
  border:1px solid var(--line); border-radius:8px; padding:10px 12px; line-height:1.5; resize:vertical;
}
.tb-input:focus{outline:2px solid var(--accent); outline-offset:1px; border-color:var(--accent)}
.tb-hint{display:block; margin-top:7px; font-family:var(--disp); font-size:12px; color:var(--text-3)}
.tb-hint.ok{color:var(--ok)}

@media (max-width:1000px){
  .mastery-wrap{padding:34px 18px 80px}
  .task-row{grid-template-columns:1fr}
  .task-stats{border-left:0; border-top:1px solid var(--line-soft); padding-left:0; padding-top:10px; margin-top:4px; align-items:flex-start; text-align:left; flex-direction:row; gap:14px; align-items:baseline}
  .cal-row{grid-template-columns:96px minmax(0,1fr) 92px; gap:9px}
  .catalog-summary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .catalog-coverage{grid-template-columns:1fr}
}
@media (max-width:640px){
  .mastery-wrap{padding-left:14px; padding-right:14px}
  .tree-grid,.case-grid,.cf-grid{grid-template-columns:1fr}
  .cf-filters{flex-direction:column; gap:8px}
  .cal-row{grid-template-columns:80px minmax(0,1fr) 78px; gap:8px}
  .cal-nm,.tax-nm{font-size:12.5px}
  .tax-row{grid-template-columns:minmax(110px,1fr) minmax(0,1fr) 32px}
  .conf-seg{width:100%}
  .conf-btn{flex:1}
  .catalog-flag-grid{grid-template-columns:1fr}
}