:root{
  --paper:#F6F8FB; --sheet:#FFFFFF; --ink:#16233F; --ink-soft:#4A5672; --rule:#D5DCE8; --margin:#E9A3AA;
  --red:#C21F2E; --red-wash:#FBE7E9; --green:#1F7A4A; --green-wash:#E3F3EA; --gold:#D9A41A; --gold-wash:#FBF2D6;
  --focus:#2B5FD9;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#0F1626; --sheet:#172036; --ink:#E7ECF6; --ink-soft:#A8B3CB; --rule:#2C3854; --margin:#7A3A44;
    --red:#FF7A85; --red-wash:#3A1C24; --green:#6FD39C; --green-wash:#163226; --gold:#F2C64B; --gold-wash:#3A3115;
    --focus:#8AB0FF; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0F1626; --sheet:#172036; --ink:#E7ECF6; --ink-soft:#A8B3CB; --rule:#2C3854; --margin:#7A3A44;
  --red:#FF7A85; --red-wash:#3A1C24; --green:#6FD39C; --green-wash:#163226; --gold:#F2C64B; --gold-wash:#3A3115;
  --focus:#8AB0FF; color-scheme:dark;
}
:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 "Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",sans-serif}
.wrap{max-width:46rem;margin:0 auto;padding:1.5rem 1.1rem 4rem}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
h1,h2,h3{font-family:"Source Serif 4",Georgia,serif;font-weight:600;line-height:1.2;margin:0}
header.top{padding:1rem 0 1.75rem;border-bottom:2px solid var(--ink);margin-bottom:2rem}
header.top h1{font-size:clamp(2rem,6vw,2.75rem);letter-spacing:-.01em}
header.top p{margin:.5rem 0 0;color:var(--ink-soft);max-width:36rem}
.pen{font-family:"Kalam","Comic Sans MS",cursive;color:var(--red)}
.stamp{display:inline-block;transform:rotate(-3deg);font-size:1.15rem;margin-top:.75rem}
section.step{margin:0 0 2.5rem}
.step h2{font-size:1.45rem;margin-bottom:.35rem}
.step .hint{color:var(--ink-soft);margin:0 0 1rem}
.grid{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr))}
label{display:block;font-weight:700;font-size:.95rem;margin-bottom:.3rem}
select,input[type=text],textarea{width:100%;font:inherit;color:var(--ink);background:var(--sheet);border:1.5px solid var(--rule);border-radius:8px;padding:.6rem .7rem}
select:focus,input:focus,textarea:focus{border-color:var(--focus)}
.btns{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem}
button{font:700 1rem/1 "Atkinson Hyperlegible",system-ui,sans-serif;border-radius:999px;padding:.8rem 1.25rem;cursor:pointer;border:2px solid var(--ink);background:var(--ink);color:var(--sheet)}
button.ghost{background:transparent;color:var(--ink)}
button:disabled{opacity:.5;cursor:not-allowed}
.status{margin-top:.8rem;color:var(--ink-soft);min-height:1.4em}
.status.err{color:var(--red)}

/* exam booklet */
.booklet{background:var(--sheet);border:1px solid var(--rule);border-radius:4px;position:relative;padding:1.4rem 1.2rem 1.4rem 3.4rem;box-shadow:0 1px 0 var(--rule),0 3px 0 -1px var(--sheet),0 4px 0 -1px var(--rule)}
.booklet::before{content:"";position:absolute;top:0;bottom:0;left:2.4rem;border-left:2px solid var(--margin)}
.qnum{position:absolute;left:.7rem;top:1.35rem;font-family:"Source Serif 4",Georgia,serif;font-weight:600;font-size:1.1rem}
.qtext{font-family:"Source Serif 4",Georgia,serif;font-size:1.12rem;line-height:1.6;margin:0}
.qmeta{display:flex;flex-wrap:wrap;gap:.4rem .9rem;margin-top:.8rem;font-size:.9rem;color:var(--ink-soft)}
.qmeta b{color:var(--ink)}
.marks{float:right;font-weight:700;margin-left:1rem}
.cw{background:var(--gold-wash);border-bottom:2px solid var(--gold);padding:0 .15em}
textarea.answer{min-height:16rem;font-family:"Source Serif 4",Georgia,serif;font-size:1.05rem;line-height:2rem;border-radius:4px;padding:.25rem .8rem;
  background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(2rem - 1px),var(--rule) calc(2rem - 1px),var(--rule) 2rem);background-attachment:local;background-position:0 .25rem}
.tabs{display:flex;gap:.4rem;margin-bottom:.7rem}
.tabs button{padding:.5rem .9rem;font-size:.92rem}
.tabs button[aria-selected=false]{background:transparent;color:var(--ink)}
.photo-drop{border:2px dashed var(--rule);border-radius:8px;padding:1.4rem;text-align:center;background:var(--sheet)}
.photo-drop img{max-width:100%;max-height:18rem;display:block;margin:.8rem auto 0;border-radius:4px}
.wc{font-size:.85rem;color:var(--ink-soft);text-align:right;margin-top:.3rem}
details.cmd{margin-top:1rem;background:var(--sheet);border:1px solid var(--rule);border-radius:8px;padding:.6rem .9rem}
details.cmd summary{cursor:pointer;font-weight:700}
.cmdtable{width:100%;border-collapse:collapse;margin-top:.6rem;font-size:.95rem}
.cmdtable td{padding:.35rem .4rem;border-top:1px solid var(--rule);vertical-align:top}
.cmdtable td:first-child{font-weight:700;white-space:nowrap}

/* marked script */
.result .score{display:flex;align-items:flex-end;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}
.bigmark{font-family:"Kalam",cursive;color:var(--red);font-size:3.4rem;line-height:1;transform:rotate(-4deg);border:3px solid var(--red);border-radius:50%;padding:.55rem .9rem .3rem;display:inline-block}
.levelline{font-family:"Kalam",cursive;color:var(--red);font-size:1.3rem;line-height:1.3}
.script{font-family:"Source Serif 4",Georgia,serif;line-height:1.85;white-space:pre-wrap;word-wrap:break-word}
mark.a{background:none;color:inherit;border-bottom:2px solid var(--red);padding:0 1px;cursor:help}
mark.a.credit{border-bottom-color:var(--green)}
sup.tick{font-family:"Kalam",cursive;font-weight:700;color:var(--red);font-size:.95rem;margin-left:1px}
sup.tick.credit{color:var(--green)}
ol.notes{list-style:none;padding:0;margin:1.2rem 0 0;border-top:1px dashed var(--rule)}
ol.notes li{display:grid;grid-template-columns:2rem 1fr;gap:.3rem;padding:.55rem 0;border-bottom:1px dashed var(--rule)}
ol.notes .n{font-family:"Kalam",cursive;font-weight:700;color:var(--red)}
ol.notes .n.credit{color:var(--green)}
ol.notes .c{font-family:"Kalam",cursive;font-size:1.1rem;color:var(--red);line-height:1.35}
ol.notes .c.credit{color:var(--green)}
ol.notes .q{display:block;font-family:"Source Serif 4",Georgia,serif;font-style:italic;color:var(--ink-soft);font-size:.92rem}
.panel{background:var(--sheet);border:1px solid var(--rule);border-radius:8px;padding:1rem 1.1rem;margin-top:1rem}
.panel h3{font-size:1.1rem;margin-bottom:.45rem}
.panel ul{margin:.2rem 0 0;padding-left:1.15rem}
.panel li{margin:.3rem 0}
.panel.good{border-left:5px solid var(--green)}
.panel.fix{border-left:5px solid var(--red)}
.panel.cwcheck{border-left:5px solid var(--gold)}
.panel.model p{font-family:"Source Serif 4",Georgia,serif;margin:.3rem 0}
.chip{display:inline-block;font-size:.85rem;padding:.15rem .55rem;border-radius:999px;background:var(--red-wash);color:var(--red);margin:.15rem .3rem .15rem 0;font-weight:700}
.transcript{font-family:"Source Serif 4",Georgia,serif;white-space:pre-wrap;font-size:.95rem}
.small{font-size:.88rem;color:var(--ink-soft)}

/* mistake log */
.log-row{display:grid;grid-template-columns:1fr auto;gap:.5rem;align-items:center;padding:.5rem 0;border-bottom:1px solid var(--rule)}
.bar{height:.55rem;background:var(--red-wash);border-radius:999px;overflow:hidden;margin-top:.3rem}
.bar span{display:block;height:100%;background:var(--red)}
.count{font-family:"Kalam",cursive;font-weight:700;color:var(--red);font-size:1.25rem}
footer{border-top:1px solid var(--rule);padding-top:1rem;margin-top:3rem;font-size:.85rem;color:var(--ink-soft)}
[hidden]{display:none!important}
@media (prefers-reduced-motion:no-preference){
  .bigmark{animation:stamp .35s ease-out}
  @keyframes stamp{from{transform:rotate(-4deg) scale(1.6);opacity:0}to{transform:rotate(-4deg) scale(1);opacity:1}}
}
.subjects{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 2rem}
.subjects.grouped{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.sgroup h3{font-family:"Atkinson Hyperlegible",system-ui,sans-serif;font-size:.9rem;font-weight:700;color:var(--ink-soft);margin:0 0 .45rem}
.sgroup .sbtns{display:flex;flex-wrap:wrap;gap:.4rem}
.sgroup button{padding:.5rem .85rem;font-size:.95rem}
.byline{font-family:"Atkinson Hyperlegible",system-ui,sans-serif;font-weight:400;font-size:.42em;letter-spacing:0;color:var(--ink-soft);white-space:nowrap}
.tagline{display:inline-block;transform:rotate(-1.5deg);font-size:clamp(1.2rem,3.6vw,1.5rem);margin:.35rem 0 .2rem}
.subjects.pick{display:block}
.subjects.pick > div{max-width:22rem}
.subjects .othersel{width:auto;min-width:11rem;flex:0 1 auto;border-radius:999px;padding:.6rem .9rem;border:2px dashed var(--rule)}
.subjhead{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.6rem;margin:0 0 .8rem}
.viewtoggle{display:inline-flex;border:2px solid var(--ink);border-radius:999px;overflow:hidden}
.viewtoggle button{border:0;border-radius:0;padding:.45rem .9rem;font-size:.9rem}
.viewtoggle button[aria-pressed=false]{background:transparent;color:var(--ink)}
.linkbtn{background:none;border:0;color:var(--ink);text-decoration:underline;text-underline-offset:3px;padding:.3rem 0;font-weight:700;font-size:.92rem;border-radius:4px}
.pickgrid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));margin-top:.6rem}
.pickgrid fieldset{border:0;margin:0;padding:0}
.pickgrid legend{font-weight:700;font-size:.9rem;color:var(--ink-soft);margin-bottom:.3rem;padding:0}
.pickgrid label{display:flex;gap:.5rem;align-items:center;font-weight:400;margin:.25rem 0;cursor:pointer}
.pickgrid input{width:1.15rem;height:1.15rem;accent-color:var(--ink)}
.subjects button{background:transparent;color:var(--ink);padding:.65rem 1.05rem}
.subjects button[aria-pressed=true]{background:var(--ink);color:var(--sheet)}
.passage{font-family:"Source Serif 4",Georgia,serif;white-space:pre-wrap;font-size:1.02rem;line-height:1.65;margin:0 0 .9rem;padding:0 0 .9rem;border-bottom:1px dashed var(--rule)}
.script.mono{font-family:"Source Serif 4",Georgia,serif}
.modebar{display:flex;gap:.5rem;margin:0 0 1.5rem}
.modebar button{padding:.55rem 1rem;font-size:.95rem}
.modebar button[aria-pressed=false]{background:transparent;color:var(--ink)}
.classbox{background:var(--sheet);border:1px solid var(--rule);border-left:5px solid var(--gold);border-radius:8px;padding:1rem 1.1rem;margin:0 0 2rem}
.classbox h2{font-size:1.2rem;margin-bottom:.4rem}
.row{display:flex;flex-wrap:wrap;gap:.6rem;align-items:flex-end}
.row > div{flex:1 1 12rem}
.row button{flex:0 0 auto}
.assignlist{list-style:none;padding:0;margin:.8rem 0 0}
.assignlist li{display:grid;grid-template-columns:1fr auto;gap:.6rem;align-items:center;padding:.6rem 0;border-top:1px solid var(--rule)}
.assignlist button{padding:.5rem .9rem;font-size:.9rem}
.done{color:var(--green);font-weight:700;font-size:.9rem}
.code{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700;font-size:1.35rem;letter-spacing:.12em;background:var(--gold-wash);padding:.1rem .5rem;border-radius:4px}
.stats{display:flex;flex-wrap:wrap;gap:1.5rem;margin:1rem 0}
.stats div{min-width:7rem}
.stats b{display:block;font-family:"Source Serif 4",Georgia,serif;font-size:1.8rem;line-height:1.1}
.stats span{font-size:.88rem;color:var(--ink-soft)}
.tablewrap{overflow-x:auto;margin-top:.6rem}
table.dash{width:100%;border-collapse:collapse;font-size:.95rem}
table.dash th{text-align:left;font-size:.85rem;color:var(--ink-soft);font-weight:700;padding:.4rem .5rem;border-bottom:2px solid var(--rule);white-space:nowrap}
table.dash td{padding:.55rem .5rem;border-bottom:1px solid var(--rule);vertical-align:top}
table.dash td.num{text-align:right;white-space:nowrap}
table.dash button{padding:.4rem .8rem;font-size:.85rem}
.pct-low{color:var(--red);font-weight:700}
.pct-mid{color:var(--gold);font-weight:700}
.pct-high{color:var(--green);font-weight:700}
details.attempt{border-top:1px solid var(--rule);padding:.6rem 0}
details.attempt summary{cursor:pointer}
details.attempt .ans{font-family:"Source Serif 4",Georgia,serif;white-space:pre-wrap;background:var(--paper);padding:.6rem .8rem;border-radius:4px;margin:.5rem 0;max-height:20rem;overflow:auto}
.teacher-section{margin:0 0 2.5rem}
.teacher-section > h2{font-size:1.45rem;margin-bottom:.35rem}