/* Salick Academy — design system (direction C: Daylight) */
@font-face{font-family:Figtree;src:url(/assets/fonts/figtree-400.woff2)format("woff2");font-weight:400;font-display:swap;font-style:normal}
@font-face{font-family:Figtree;src:url(/assets/fonts/figtree-500.woff2)format("woff2");font-weight:500;font-display:swap;font-style:normal}
@font-face{font-family:Figtree;src:url(/assets/fonts/figtree-600.woff2)format("woff2");font-weight:600;font-display:swap;font-style:normal}
@font-face{font-family:Figtree;src:url(/assets/fonts/figtree-700.woff2)format("woff2");font-weight:700;font-display:swap;font-style:normal}
@font-face{font-family:"Bricolage Grotesque";src:url(/assets/fonts/bricolage-wght.woff2)format("woff2");font-weight:200 800;font-display:swap;font-style:normal}

:root{
  --sky:#EFF0FB; --sky-2:#E4E5F7; --card:#FFFFFF; --card-2:#FAFAFE;
  --ink:#262340; --ink-2:#4B4770; --ink-3:#7B76A0;
  --line:#DEDEF2; --line-2:#CBCAE8;
  --grape:#5546C8; --grape-2:#3F31A6; --grape-tint:#E9E7FA;
  --leaf:#0E8A63; --leaf-bg:#E2F6EF;
  --coral:#C4433C; --coral-bg:#FCEAE8;
  --sun:#96670A; --sun-bg:#FDF3DF;
  --shadow:0 18px 44px -26px rgba(38,35,64,.42);
  --r-lg:24px; --r-md:16px; --r-sm:11px;
  --f-disp:"Bricolage Grotesque",ui-rounded,system-ui,sans-serif;
  --f-ui:Figtree,system-ui,-apple-system,"Segoe UI",sans-serif;
  --measure:66ch;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --sky:#14131F; --sky-2:#1B1A2B; --card:#1E1D30; --card-2:#242238;
    --ink:#E9E8F5; --ink-2:#B9B6D4; --ink-3:#8B87AC;
    --line:#2E2C46; --line-2:#3D3A5C;
    --grape:#9E92FF; --grape-2:#BDB4FF; --grape-tint:#2A2748;
    --leaf:#4ED8A6; --leaf-bg:#16302A;
    --coral:#FF8B84; --coral-bg:#3A2124;
    --sun:#F0C26A; --sun-bg:#332B18;
    --shadow:0 18px 44px -26px rgba(0,0,0,.7);
  }
}
:root[data-theme=dark]{
  --sky:#14131F; --sky-2:#1B1A2B; --card:#1E1D30; --card-2:#242238;
  --ink:#E9E8F5; --ink-2:#B9B6D4; --ink-3:#8B87AC;
  --line:#2E2C46; --line-2:#3D3A5C;
  --grape:#9E92FF; --grape-2:#BDB4FF; --grape-tint:#2A2748;
  --leaf:#4ED8A6; --leaf-bg:#16302A;
  --coral:#FF8B84; --coral-bg:#3A2124;
  --sun:#F0C26A; --sun-bg:#332B18;
  --shadow:0 18px 44px -26px rgba(0,0,0,.7);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}
body{margin:0;background:var(--sky);color:var(--ink);font-family:var(--f-ui);font-size:17px;
     line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;font-family:var(--f-disp);font-weight:600;line-height:1.15;
            letter-spacing:-.02em;text-wrap:balance}
p{margin:0}
a{color:inherit}
img,svg,canvas{max-width:100%}
:focus-visible{outline:3px solid var(--grape);outline-offset:3px;border-radius:8px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
    clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--grape);color:#fff;
      padding:.7rem 1.2rem;border-radius:0 0 var(--r-sm) 0}
.skip:focus{left:0}
.wrap{width:min(1120px,100% - 2.5rem);margin-inline:auto}
.tag{font-size:.73rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}
.lead{color:var(--ink-2);font-size:1.08rem;max-width:var(--measure)}

/* ---------- maths ---------- */
.katex{font-size:1.06em}
.katex-display{margin:1.2rem 0;max-width:100%;overflow-x:auto;overflow-y:hidden;
               padding-bottom:.3rem}

/* ---------- header / footer ---------- */
header.site{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--sky) 92%,transparent);
            backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
header.site>.wrap{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;height:70px}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none}
.brand .bug{min-width:44px;height:34px;padding:0 .4rem;border-radius:10px;background:var(--grape);
            color:#fff;display:grid;place-items:center;font-size:1.02rem;font-weight:700;
            letter-spacing:.01em;line-height:1;flex:none}
:root[data-theme=dark] .brand .bug,
:root:not([data-theme=light]) .brand .bug{color:#14131F}
@media (prefers-color-scheme:light){:root:not([data-theme=dark]) .brand .bug{color:#fff}}
.brand .nm{font-family:var(--f-disp);font-weight:700;font-size:1.04rem}
.desknav ul{display:flex;gap:.25rem;list-style:none;margin:0;padding:0}
.desknav a{text-decoration:none;font-size:.92rem;font-weight:500;color:var(--ink-2);
           padding:.5rem .85rem;border-radius:999px}
.desknav a:hover{background:var(--grape-tint);color:var(--grape-2)}
.navtoggle{display:none;appearance:none;background:var(--card);border:1px solid var(--line-2);
           border-radius:999px;padding:.5rem 1rem;font:inherit;font-size:.88rem;font-weight:600;
           color:var(--ink);cursor:pointer}
.mobilenav{border-top:1px solid var(--line);background:var(--card)}
.mobilenav ul{list-style:none;margin:0;padding:.5rem 1.25rem 1rem}
.mobilenav a{display:block;padding:.7rem 0;text-decoration:none;font-weight:600;
             border-bottom:1px solid var(--line)}
@media(max-width:820px){.desknav{display:none}.navtoggle{display:block}}
@media(min-width:821px){.mobilenav{display:none}}

footer.site{background:var(--card);border-top:1px solid var(--line);padding:3rem 0 2rem;
            color:var(--ink-3);font-size:.9rem;margin-top:4rem}
.foot-top{display:flex;justify-content:space-between;gap:3rem;flex-wrap:wrap;
          padding-bottom:2rem;border-bottom:1px solid var(--line);margin-bottom:1.6rem}
.foot-brand p{margin-top:.9rem;max-width:34ch}
.foot-cols{display:flex;gap:3.5rem;flex-wrap:wrap}
.foot-cols ul{list-style:none;margin:.8rem 0 0;padding:0;display:flex;flex-direction:column;gap:.5rem}
.foot-cols a{text-decoration:none;color:var(--ink-2)}
.foot-cols a:hover{color:var(--grape)}
.disclaimer{max-width:66ch;line-height:1.75}
.copy{margin-top:1rem;font-size:.82rem}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:5rem 0 4.5rem}
.blob{position:absolute;border-radius:50%;filter:blur(10px);opacity:.5;pointer-events:none}
.blob.one{width:520px;height:460px;background:var(--grape-tint);right:-90px;top:-120px}
.blob.two{width:330px;height:290px;background:var(--leaf-bg);right:180px;top:220px;opacity:.7}
.doodle{position:absolute;color:var(--grape);opacity:.3;pointer-events:none}
.float{animation:bob 7s ease-in-out infinite}
.float.b{animation-duration:9s;animation-delay:-2s}
.float.c{animation-duration:8s;animation-delay:-4s}
@keyframes bob{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-12px) rotate(3deg)}}
.hero>.wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:3.5rem;
            align-items:center}
@media(max-width:940px){.hero>.wrap{grid-template-columns:1fr;gap:2.5rem}.doodle{display:none}}
.pill{display:inline-flex;align-items:center;gap:.5rem;background:var(--card);
      border:1px solid var(--line-2);border-radius:999px;padding:.45rem 1rem;font-size:.82rem;
      font-weight:600;color:var(--grape-2);margin-bottom:1.6rem}
.pill span{width:7px;height:7px;border-radius:50%;background:var(--leaf)}
.hero h1{font-size:clamp(2.5rem,6vw,4.1rem);letter-spacing:-.032em}
.hero .lede{color:var(--ink-2);font-size:1.1rem;max-width:48ch;margin-top:1.5rem}
.actions{display:flex;gap:.85rem;flex-wrap:wrap;margin-top:2.2rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.9rem 1.6rem;border-radius:999px;
     font:inherit;font-size:.96rem;font-weight:600;text-decoration:none;border:2px solid transparent;
     cursor:pointer;transition:transform .16s,background .18s,border-color .18s}
.btn:hover{transform:translateY(-2px)}
.btn-solid{background:var(--grape);color:#fff}
:root[data-theme=dark] .btn-solid{color:#14131F}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .btn-solid{color:#14131F}}
.btn-solid:hover{background:var(--grape-2)}
.btn-line{border-color:var(--line-2);color:var(--ink);background:var(--card)}
.btn-line:hover{border-color:var(--grape)}
.hero-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
           padding:1.8rem;box-shadow:var(--shadow)}
.hero-card h2{font-size:1.05rem;margin-bottom:1.2rem}
.tally{margin:0;display:flex;flex-direction:column;gap:1rem}
.tally div{display:flex;align-items:baseline;gap:.8rem}
.tally dt{font-family:var(--f-disp);font-size:2.1rem;font-weight:700;line-height:1;
          font-variant-numeric:tabular-nums;color:var(--grape);min-width:2.6ch}
.tally dd{margin:0;color:var(--ink-2);font-size:.94rem}
.hero-card .foot{margin-top:1.3rem;padding-top:1.1rem;border-top:1px solid var(--line);
                 font-size:.84rem;color:var(--ink-3)}

/* ---------- sections ---------- */
.panel{padding:4.5rem 0}
.panel.tint{background:var(--sky-2)}
.page-head{padding:2.6rem 0 0}
.page-head h1{font-size:clamp(2rem,4.4vw,3rem);margin-bottom:.9rem}
.sec-head{max-width:var(--measure);margin-bottom:2.6rem}
.sec-head .tag{color:var(--grape);display:block;margin-bottom:.8rem}
.sec-head h2{font-size:clamp(1.8rem,3.6vw,2.5rem);margin-bottom:.9rem}
.sec-head p{color:var(--ink-2)}
.crumb{display:flex;flex-wrap:wrap;gap:.45rem;font-size:.84rem;color:var(--ink-3);margin-bottom:1rem}
.crumb a{text-decoration:none}
.crumb a:hover{color:var(--grape)}
.meta{display:flex;flex-wrap:wrap;gap:.5rem;margin:1.2rem 0 0}
.chip{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.32rem .85rem;
      font-size:.8rem;font-weight:600;color:var(--ink-2)}
.chip.on{background:var(--grape-tint);border-color:transparent;color:var(--grape-2)}
.chip.fresh{background:var(--sun-bg);border-color:transparent;color:var(--sun)}
.tag.lvl{color:var(--grape);display:block;margin-bottom:.6rem}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:1.3rem}
@media(max-width:820px){.cards{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.9rem;
      text-decoration:none;display:flex;flex-direction:column;gap:.8rem;
      transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.card .ico{width:44px;height:44px;border-radius:13px;background:var(--sky);display:grid;
           place-items:center;color:var(--grape);flex:none;font-size:1.2rem}
.card h3{font-size:1.3rem}
.card .n{font-size:.9rem;font-weight:600;color:var(--grape)}
.card .list{font-size:.89rem;color:var(--ink-3);border-top:1px solid var(--line);padding-top:.9rem;
            margin-top:auto}
.card .live{font-size:.84rem;font-weight:600;color:var(--leaf)}
.hows{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
@media(max-width:900px){.hows{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.hows{grid-template-columns:1fr}}
.how{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:1.4rem}
.how h3{font-size:1.05rem;margin-bottom:.5rem;color:var(--grape-2)}
.how p{font-size:.93rem;color:var(--ink-2)}

/* ---------- subject page ---------- */
.gblock{margin-bottom:2.4rem}
.ghead{display:flex;align-items:baseline;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}
.ghead .tag{color:var(--grape)}
.ghead h2{font-size:1.4rem}
.glink{margin-left:auto;font-size:.88rem;font-weight:600;color:var(--grape-2);text-decoration:none}
.gtopics{display:flex;flex-wrap:wrap;gap:.6rem}
.gt{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.5rem 1.05rem;
    font-size:.9rem;font-weight:500;text-decoration:none;transition:border-color .16s,color .16s}
.gt:hover{border-color:var(--grape);color:var(--grape-2)}
.gt.soon{opacity:.55;border-style:dashed}
.examblock{margin-top:3rem;border-top:1px solid var(--line);padding-top:2rem}
.examblock h2{font-size:1.3rem;margin-bottom:1rem}
ul.exam{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.7rem;
        max-width:var(--measure);color:var(--ink-2)}
ul.exam strong{color:var(--ink);display:inline-block;min-width:8.5rem}

/* ---------- topic roster ---------- */
.troster{border-top:1px solid var(--line)}
.trow{display:grid;grid-template-columns:auto 1fr auto;gap:1.3rem;align-items:center;
      padding:1.15rem .4rem;border-bottom:1px solid var(--line);text-decoration:none;
      transition:background .16s}
.trow:hover{background:var(--card)}
.trow .tnum{font-family:var(--f-disp);font-weight:700;color:var(--line-2);font-size:1.1rem;
            font-variant-numeric:tabular-nums}
.trow .tmain strong{font-weight:600;display:block}
.trow .tmain small{color:var(--ink-3);font-size:.88rem}
.trow .tstate{font-size:.84rem;font-weight:600;color:var(--grape)}
.trow.soon{opacity:.6}
.trow.soon .tstate{color:var(--ink-3)}

/* ---------- topic page ---------- */
.tabs{position:sticky;top:70px;z-index:30;background:var(--sky);padding:1.5rem 0 0;
      box-shadow:0 12px 16px -14px rgba(0,0,0,.25)}
.tablist{display:flex;gap:.2rem;border-bottom:1px solid var(--line);overflow-x:auto;
         scrollbar-width:none;contain:paint}
.tablist::-webkit-scrollbar{display:none}
.tablist a{text-decoration:none;font-size:.95rem;font-weight:600;color:var(--ink-3);
           padding:.8rem 1.05rem;border-bottom:3px solid transparent;white-space:nowrap;
           transition:color .16s,border-color .16s}
.tablist a:hover{color:var(--grape-2)}
.tablist a[aria-current=page]{color:var(--grape);border-bottom-color:var(--grape)}
.tablist .num{display:inline-block;margin-left:.4rem;background:var(--sky-2);color:var(--ink-3);
              border-radius:999px;padding:.05rem .45rem;font-size:.74rem;
              font-variant-numeric:tabular-nums}
.tablist a[aria-current=page] .num{background:var(--grape-tint);color:var(--grape-2)}
.objectives{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
            padding:1.2rem 1.5rem;max-width:70ch;margin-bottom:2.2rem}
.objectives .tag{color:var(--grape);display:block;margin-bottom:.5rem}
.objectives ul{margin:0;padding-left:1.15rem;color:var(--ink-2);font-size:.95rem}
.notes-layout{display:grid;grid-template-columns:1fr 240px;gap:3rem;align-items:start}
/* grid and flex children default to min-width:auto, which refuses to shrink below the
   intrinsic width of a wide equation or table. This is what lets the page fit a phone. */
.notes-layout>*{min-width:0}
@media(max-width:960px){.notes-layout{grid-template-columns:1fr}.toc{display:none}}
.prose{max-width:min(var(--measure),100%)}
.prose h2{font-size:1.5rem;margin:2.4rem 0 .8rem;scroll-margin-top:150px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.15rem;margin:1.8rem 0 .6rem;scroll-margin-top:150px}
.prose p{color:var(--ink-2);margin-bottom:1rem}
.prose strong{color:var(--ink);font-weight:600}
.prose ol,.prose ul{color:var(--ink-2);padding-left:1.3rem;margin:0 0 1.1rem}
.prose li{margin-bottom:.4rem}
.prose table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.94rem}
.tablewrap{overflow-x:auto;max-width:100%;contain:paint}
.prose th,.prose td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line)}
.callout{border-radius:var(--r-md);padding:1.15rem 1.4rem;margin:1.6rem 0;
         max-width:100%;overflow-x:auto}
.callout .tag{display:block;margin-bottom:.5rem}
.callout p:last-child{margin-bottom:0}
.callout.key{background:var(--grape-tint)}
.callout.key .tag{color:var(--grape-2)}
.callout.def{background:var(--grape-tint)}
.callout.def .tag{color:var(--grape-2)}
.callout.warn{background:var(--coral-bg)}
.callout.warn .tag{color:var(--coral)}
.callout.tip{background:var(--sun-bg)}
.callout.tip .tag{color:var(--sun)}
.callout.note{background:var(--card);border:1px solid var(--line)}
.callout.note .tag{color:var(--ink-3)}
.toc{position:sticky;top:160px;font-size:.9rem}
.toc .tag{color:var(--ink-3);display:block;margin-bottom:.7rem}
.toc ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc a{display:block;padding:.38rem 0 .38rem .9rem;text-decoration:none;color:var(--ink-3);
       margin-left:-2px;border-left:2px solid transparent}
.toc a:hover{color:var(--grape)}
.toc a.on{color:var(--grape-2);font-weight:600;border-left-color:var(--grape)}

/* ---------- interactive figure ---------- */
.figure{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
        padding:1.2rem;margin:1.8rem 0}
.figure canvas{width:100%;height:300px;display:block;border-radius:var(--r-sm);
               background:var(--card-2);touch-action:none;cursor:ew-resize}
.fig-ctl{display:flex;align-items:center;gap:1rem;margin-top:1rem;flex-wrap:wrap}
.fig-ctl input[type=range]{flex:1;min-width:150px;accent-color:var(--grape)}
.fig-read{background:var(--sky);border-radius:var(--r-sm);padding:.45rem .9rem;
          font-variant-numeric:tabular-nums;font-size:.95rem;font-weight:600}
.fig-cap{font-size:.87rem;color:var(--ink-3);margin-top:.8rem}

/* ---------- examples / practice ---------- */
.example,.pq{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
             padding:1.5rem 1.7rem;margin-bottom:1.1rem;max-width:min(78ch,100%)}
.example h2{font-size:1.15rem}
.example .q{color:var(--ink-2);margin:.6rem 0 1.1rem}
.steps{list-style:none;margin:0;padding:0}
.steps li{display:grid;grid-template-columns:auto 1fr;gap:1rem;align-items:start;padding:.9rem 0;
          border-top:1px solid var(--line)}
.steps li>*{min-width:0}
.steps .n{width:1.75rem;height:1.75rem;border-radius:50%;background:var(--grape-tint);
          color:var(--grape-2);display:grid;place-items:center;font-size:.82rem;font-weight:700;flex:none}
.steps .why{display:block;color:var(--ink-3);font-size:.88rem;margin-top:.35rem}
.reveal{appearance:none;background:var(--grape);color:#fff;border:0;border-radius:999px;
        padding:.6rem 1.25rem;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;
        transition:background .18s}
:root[data-theme=dark] .reveal{color:#14131F}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .reveal{color:#14131F}}
.reveal:hover{background:var(--grape-2)}
.reveal.ghost{background:var(--card);color:var(--grape-2);border:2px solid var(--line-2)}
.reveal.ghost:hover{background:var(--grape-tint);border-color:var(--grape)}
.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.5rem;align-items:center}
.filters .tag{color:var(--ink-3);margin-right:.3rem}
.fbtn{appearance:none;background:var(--card);border:1px solid var(--line);border-radius:999px;
      padding:.42rem 1rem;font:inherit;font-size:.86rem;font-weight:600;color:var(--ink-2);
      cursor:pointer;transition:all .16s}
.fbtn:hover{border-color:var(--grape)}
.fbtn[aria-pressed=true]{background:var(--grape);border-color:var(--grape);color:#fff}
:root[data-theme=dark] .fbtn[aria-pressed=true]{color:#14131F}
.pq-top{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;margin-bottom:.6rem}
.pq-top .tag{color:var(--ink-3)}
.pq .body{color:var(--ink-2);margin-bottom:1rem}
.pq .sol{margin-top:1.1rem;border-top:1px solid var(--line);padding-top:1rem}
.diff{display:inline-flex;gap:2px;vertical-align:middle}
.diff i{width:6px;height:6px;border-radius:50%;background:var(--line-2);display:block}
.diff i.on{background:var(--grape)}

/* ---------- coverage table ---------- */
.tablewrap{overflow-x:auto}
table.cov{width:100%;border-collapse:collapse;font-size:.93rem;min-width:600px}
table.cov th{text-align:left;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;
             color:var(--ink-3);padding:.6rem .8rem;border-bottom:2px solid var(--line)}
table.cov td{padding:.75rem .8rem;border-bottom:1px solid var(--line);color:var(--ink-2)}
.numcell{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.cov .bar{display:block;width:130px;height:7px;border-radius:999px;background:var(--sky-2);
               overflow:hidden}
table.cov .bar i{display:block;height:100%;background:var(--grape);border-radius:999px}

/* ---------- instructor ---------- */
.who{display:grid;grid-template-columns:270px 1fr;gap:3rem;align-items:start}
@media(max-width:860px){.who{grid-template-columns:1fr;gap:2rem}
                        figure.portrait{max-width:340px}}
/* the placeholder shape, used only when no photograph is configured */
.portrait{aspect-ratio:4/5;border-radius:var(--r-md);background:var(--card);
          border:1px dashed var(--line-2);display:grid;place-items:center}
.portrait p{color:var(--ink-3);text-align:center;font-size:.84rem;line-height:2}
figure.portrait{aspect-ratio:auto;display:block;margin:0;padding:0;border:0;background:none}
figure.portrait img{display:block;width:100%;height:auto;border-radius:var(--r-md);
                    border:1px solid var(--line)}
figure.portrait figcaption{margin-top:.7rem;color:var(--ink-3);font-size:.82rem;line-height:1.5}
.cdirect{margin-top:1.6rem;color:var(--ink-3);font-size:.92rem}
.cdirect a{color:var(--grape);text-decoration:underline;text-underline-offset:3px}
.who .tag{color:var(--grape);display:block;margin-bottom:.6rem}
.who h2{font-size:clamp(1.7rem,3.2vw,2.3rem);margin-bottom:.8rem}
.creds{list-style:none;margin:1.6rem 0 0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);
       gap:.65rem}
@media(max-width:620px){.creds{grid-template-columns:1fr}}
.creds li{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
          padding:.85rem 1rem}
.creds .tag{color:var(--ink-3);display:block;margin-bottom:.2rem}
.creds strong{font-weight:600;font-size:.93rem}
.creds li.hon{background:var(--grape-tint);border-color:transparent}
.creds li.hon strong{color:var(--grape-2)}
.more{margin-top:1.4rem;font-weight:600}
.more a{color:var(--grape-2)}

/* ---------- contact form ---------- */
.cform{display:flex;flex-direction:column;gap:1.1rem;max-width:38rem;background:var(--card);
       border:1px solid var(--line);border-radius:var(--r-lg);padding:1.9rem}
.cform label{display:flex;flex-direction:column;gap:.4rem;font-weight:600;font-size:.92rem}
.cform input[type=text],.cform input[type=email],.cform textarea{
  font:inherit;font-weight:400;padding:.7rem .9rem;border:2px solid var(--line);
  border-radius:var(--r-sm);background:var(--card-2);color:var(--ink)}
.cform input:focus,.cform textarea:focus{border-color:var(--grape);outline:none}
.cform button{align-self:flex-start}

/* ---------- quiz ---------- */
.quiz-shell{display:grid;grid-template-columns:1fr 250px;gap:2rem;align-items:start}
.quiz-shell>*{min-width:0}
@media(max-width:940px){.quiz-shell{grid-template-columns:1fr}}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:2rem;
       min-height:22rem}
@media(max-width:520px){.qcard{padding:1.3rem}}
.qhead{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding-bottom:1rem;
       border-bottom:1px solid var(--line);margin-bottom:1.3rem;flex-wrap:wrap}
.qhead .tag{color:var(--ink-3)}
.qprog{height:6px;border-radius:999px;background:var(--sky-2);overflow:hidden;margin-bottom:1.3rem}
.qprog i{display:block;height:100%;background:var(--grape);border-radius:999px;transition:width .35s}
.qstem{font-size:1.06rem;margin-bottom:1.3rem}
.opts{display:flex;flex-direction:column;gap:.6rem;margin:0;padding:0;border:0}
.opt{display:flex;gap:.85rem;align-items:center;padding:.9rem 1.05rem;border-radius:var(--r-md);
     border:2px solid var(--line);background:var(--card);cursor:pointer;
     transition:border-color .16s,background .16s,transform .16s}
.opt:hover{border-color:var(--grape);transform:translateX(3px)}
.opt input{accent-color:var(--grape);width:17px;height:17px;flex:none;margin:0}
.opt .k{font-size:.8rem;font-weight:700;color:var(--ink-3);flex:none;width:1ch}
.opt .t{flex:1 1 auto;min-width:0;overflow-wrap:anywhere}
.opt .t .katex{max-width:100%}
.opt .mk{margin-left:auto;font-weight:700;opacity:0;transition:opacity .2s}
.opt.correct{border-color:var(--leaf);background:var(--leaf-bg)}
.opt.correct .mk{opacity:1;color:var(--leaf)}
.opt.wrong{border-color:var(--coral);background:var(--coral-bg)}
.opt.wrong .mk{opacity:1;color:var(--coral)}
.opt.locked{pointer-events:none}
.opt.dim{opacity:.45}
.numwrap{display:flex;gap:.7rem;align-items:center;flex-wrap:wrap}
.numwrap input[type=text]{font:inherit;font-size:1.05rem;padding:.7rem 1rem;border:2px solid var(--line);
  border-radius:var(--r-md);width:170px;background:var(--card-2);color:var(--ink)}
.numwrap input:focus{border-color:var(--grape);outline:none}
.numwrap .unit{color:var(--ink-3);font-size:.92rem}
.fb{margin-top:1.3rem;border-radius:var(--r-md);padding:1.15rem 1.35rem}
.fb.ok{background:var(--leaf-bg)}
.fb.no{background:var(--sun-bg)}
.fb .h{font-family:var(--f-disp);font-weight:700;font-size:1.04rem;margin-bottom:.45rem}
.fb.ok .h{color:var(--leaf)}
.fb.no .h{color:var(--sun)}
.fb .msg{font-size:.95rem;color:var(--ink-2);margin-bottom:1.1rem}
.fb .steps{border:0}
.fb .steps li{border-top:0;background:var(--card);border-radius:var(--r-sm);padding:.8rem 1rem;
              margin-bottom:.6rem;opacity:0;transform:translateY(6px);animation:pop .4s ease forwards}
@keyframes pop{to{opacity:1;transform:none}}
.fb .steps .n{background:var(--grape);color:#fff}
:root[data-theme=dark] .fb .steps .n{color:#14131F}
.fb .lnk{display:inline-block;margin-top:.6rem;font-size:.9rem;font-weight:600;color:var(--grape-2)}
.qnav{display:flex;justify-content:space-between;gap:.8rem;margin-top:1.5rem;flex-wrap:wrap}
.qside{display:flex;flex-direction:column;gap:1rem}
.qbox{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:1.1rem 1.2rem}
.qbox .tag{color:var(--ink-3);display:block;margin-bottom:.7rem}
.modes{display:flex;flex-direction:column;gap:.5rem}
.mode{display:flex;gap:.7rem;align-items:flex-start;padding:.7rem .8rem;border-radius:var(--r-sm);
      border:2px solid var(--line);cursor:pointer;font-size:.88rem}
.mode input{accent-color:var(--grape);margin:.2rem 0 0}
.mode small{display:block;color:var(--ink-3);font-size:.8rem;line-height:1.45}
.mode.on{border-color:var(--grape);background:var(--grape-tint)}
.dots{display:grid;grid-template-columns:repeat(5,1fr);gap:.4rem}
.dot{aspect-ratio:1;border-radius:8px;border:2px solid var(--line);background:var(--card);
     display:grid;place-items:center;font:inherit;font-size:.8rem;font-weight:700;color:var(--ink-3);
     cursor:pointer;padding:0}
.dot.now{border-color:var(--grape);color:var(--grape-2)}
.dot.right{background:var(--leaf-bg);border-color:var(--leaf);color:var(--leaf)}
.dot.wrongd{background:var(--coral-bg);border-color:var(--coral);color:var(--coral)}
.timer{font-family:var(--f-disp);font-size:1.5rem;font-weight:700;font-variant-numeric:tabular-nums}
.report .score{display:flex;align-items:baseline;gap:.6rem;margin-bottom:.4rem}
.report .score b{font-family:var(--f-disp);font-size:3rem;line-height:1;font-weight:700;color:var(--grape)}
.report .score span{color:var(--ink-3)}
.bd{list-style:none;margin:1.5rem 0 0;padding:0}
.bd li{display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:center;padding:.7rem 0;
       border-bottom:1px solid var(--line)}
.bd .o{font-size:.92rem;color:var(--ink-2)}
.bd .r{font-weight:700;font-variant-numeric:tabular-nums;font-size:.92rem}
.bd .r.low{color:var(--coral)}
.bd .r.hi{color:var(--leaf)}
.missed{margin-top:1.5rem}
.missed ol{margin:.6rem 0 0;padding:0}
.missed li{background:var(--sky);border-radius:var(--r-sm);padding:.85rem 1.05rem;margin-bottom:.55rem;
           font-size:.92rem;color:var(--ink-2);list-style:none}
@media print{header.site,.tabs,.qside,footer.site .foot-top,.qnav{display:none}
  body{background:#fff;color:#000}.qcard{border:0;padding:0}}

/* ---------- quiz bank ---------- */
.poolnote{margin:.7rem 0 0;font-size:.78rem;line-height:1.5;color:var(--ink-3)}
.poolnote b{color:var(--ink-2);font-weight:600}
.qloading{color:var(--ink-3);padding:2.5rem 0;text-align:center}