/* GMAT Prep Tracker — local, offline, theme-aware. */
:root{
  --bg:#f7f7f5; --panel:#fff; --ink:#1c1c1a; --muted:#6b6b66; --line:#e3e3de;
  --accent:#2f6f4e; --accent-soft:#e6f0ea;
  --wrong:#b3261e; --wrong-soft:#fbeae9; --right:#1f7a4d; --right-soft:#e6f4ec;
  --warn:#8a6d1f; --radius:12px;
  --easy:#4b8a3f; --med:#a8761f; --hard:#a33b2a;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#16171a; --panel:#1e2024; --ink:#ececea; --muted:#9a9a95; --line:#2e3137;
    --accent:#6fbf8f; --accent-soft:#1e2f26;
    --wrong:#f2837a; --wrong-soft:#33211f; --right:#7fd3a3; --right-soft:#1a2c22;
    --easy:#7fbf6f; --med:#d3a850; --hard:#e08a76;
  }
}
:root[data-theme="dark"]{
  --bg:#16171a; --panel:#1e2024; --ink:#ececea; --muted:#9a9a95; --line:#2e3137;
  --accent:#6fbf8f; --accent-soft:#1e2f26;
  --wrong:#f2837a; --wrong-soft:#33211f; --right:#7fd3a3; --right-soft:#1a2c22;
  --easy:#7fbf6f; --med:#d3a850; --hard:#e08a76;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif}
img{max-width:100%;height:auto}
[hidden]{display:none!important}
button{font:inherit;color:inherit}

/* boot */
.boot{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);z-index:50;padding:20px}
.boot-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 32px;max-width:560px;text-align:center}
.boot-card h1{margin:0 0 8px;font-size:20px}
.boot-hint{color:var(--muted);font-size:13px;white-space:pre-wrap;text-align:left;margin-top:14px}

/* top bar */
.topbar{position:sticky;top:env(safe-area-inset-top,0);z-index:20;background:var(--panel);
  border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;
  padding:10px 16px;flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.brand strong{font-size:15px;letter-spacing:.2px}
.countdown{color:var(--muted);font-size:12.5px;white-space:nowrap}
.tabs{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.tab{background:none;border:1px solid transparent;border-radius:999px;padding:6px 14px;
  cursor:pointer;color:var(--muted);font-size:13.5px}
.tab:hover{background:var(--bg)}
.tab.on{background:var(--accent-soft);color:var(--accent);border-color:var(--accent);font-weight:600}
.overall{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);white-space:nowrap}
.bar{width:120px;height:7px;background:var(--line);border-radius:999px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .35s ease}

main{max-width:1000px;margin:0 auto;padding:20px 16px 80px}

/* day header */
.dayhead{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;margin-bottom:18px}
.dayhead h2{margin:0 0 4px;font-size:19px}
.dayhead .sub{color:var(--muted);font-size:13.5px}
.daynav{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap;align-items:center}
.btn{background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:7px 13px;cursor:pointer;font-size:13.5px}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.primary:hover{opacity:.9;color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
select.btn{appearance:auto}

.dstats{display:flex;gap:18px;margin-top:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.dstats b{color:var(--ink)}

/* question card */
.q{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:14px;overflow:hidden}
.q.is-right{border-color:var(--right)}
.q.is-wrong{border-color:var(--wrong)}
.qhead{display:flex;align-items:center;gap:10px;padding:12px 16px;cursor:pointer;
  border-bottom:1px solid transparent}
.q.open .qhead{border-bottom-color:var(--line)}
.qhead:hover{background:var(--bg)}
.qnum{font-variant-numeric:tabular-nums;color:var(--muted);font-size:12.5px;min-width:26px}
.qtitle{flex:1;min-width:0;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--line);
  color:var(--muted);white-space:nowrap}
.chip.type{background:var(--accent-soft);color:var(--accent);border-color:transparent;font-weight:600}
.chip.easy{color:var(--easy)} .chip.med{color:var(--med)} .chip.hard{color:var(--hard)}
.mark{font-size:13px;width:20px;text-align:center}
.mark.right{color:var(--right)} .mark.wrong{color:var(--wrong)}

.qbody{padding:18px 20px 20px}
.stem{font-size:15px;line-height:1.65;overflow-wrap:anywhere}
.stem table{border-collapse:collapse;margin:12px 0;font-size:13.5px}
.stem td,.stem th{border:1px solid var(--line);padding:5px 9px}
.stem-wrap{overflow-x:auto}

.choices{display:grid;gap:8px;margin:18px 0 0}
.choice{display:flex;gap:11px;align-items:flex-start;text-align:left;width:100%;
  background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:10px 13px;cursor:pointer}
.choice:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft)}
.choice .ltr{font-weight:700;color:var(--muted);min-width:16px}
.choice.sel{border-color:var(--accent);background:var(--accent-soft)}
.choice.correct{border-color:var(--right);background:var(--right-soft)}
.choice.correct .ltr{color:var(--right)}
.choice.chosen-wrong{border-color:var(--wrong);background:var(--wrong-soft)}
.choice.chosen-wrong .ltr{color:var(--wrong)}
.choice:disabled{cursor:default}

.freeform{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.freeform input{flex:1;min-width:150px;padding:9px 12px;border:1px solid var(--line);
  border-radius:8px;background:var(--panel);color:var(--ink)}

.qactions{display:flex;gap:9px;align-items:center;margin-top:16px;flex-wrap:wrap}
.verdict{font-size:13.5px;font-weight:600}
.verdict.right{color:var(--right)} .verdict.wrong{color:var(--wrong)}
.spacer{flex:1}
.meta{font-size:12px;color:var(--muted)}
.linkout{color:var(--muted);font-size:12.5px;text-decoration:none;border-bottom:1px dotted var(--line)}
.linkout:hover{color:var(--accent)}

/* solution: gated until answered, collapsed by default */
.sol{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}
.sol-toggle{display:flex;align-items:center;gap:9px;background:none;border:1px dashed var(--line);
  border-radius:8px;padding:9px 13px;cursor:pointer;width:100%;text-align:left;color:var(--muted);font-size:13.5px}
.sol-toggle:hover{border-color:var(--accent);color:var(--accent)}
.sol-toggle .caret{transition:transform .2s}
.sol.open .sol-toggle .caret{transform:rotate(90deg)}
.sol-body{margin-top:14px;font-size:14.5px;line-height:1.65;overflow-wrap:anywhere}
.sol-by{font-size:12px;color:var(--muted);margin-bottom:10px}
.sol-locked{font-size:13px;color:var(--muted);font-style:italic;
  border:1px dashed var(--line);border-radius:8px;padding:11px 13px;text-align:center}

/* plan / stats */
.week{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;margin-bottom:14px}
.week h3{margin:0 0 3px;font-size:16px}
.week .goal{color:var(--muted);font-size:13.5px;margin-bottom:12px}
.daylist{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.daycell{border:1px solid var(--line);border-radius:9px;padding:9px 11px;cursor:pointer;background:var(--panel)}
.daycell:hover{border-color:var(--accent)}
.daycell.today{border-color:var(--accent);background:var(--accent-soft)}
.daycell.done{opacity:.6}
.daycell .d{font-size:12px;color:var(--muted)}
.daycell .f{font-size:12.5px;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.daycell .p{font-size:11.5px;color:var(--muted);margin-top:5px}
.daycell.mock{background:var(--warn);color:#fff;border-color:var(--warn)}
.daycell.mock .d,.daycell.mock .p{color:#fff;opacity:.85}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:15px 17px}
.stat .n{font-size:26px;font-weight:700;font-variant-numeric:tabular-nums}
.stat .l{font-size:12.5px;color:var(--muted);margin-top:2px}

table.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tblwrap{overflow-x:auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}
table.tbl th,table.tbl td{padding:9px 13px;text-align:left;border-bottom:1px solid var(--line)}
table.tbl th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px}
table.tbl tr:last-child td{border-bottom:none}
.minibar{height:6px;background:var(--line);border-radius:999px;overflow:hidden;min-width:70px}
.minibar i{display:block;height:100%;background:var(--accent)}

.empty{text-align:center;color:var(--muted);padding:44px 20px;font-size:14px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:min(560px,calc(100vw - 210px));background:var(--ink);
  color:var(--bg);padding:10px 18px;border-radius:999px;font-size:13.5px;z-index:40}

@media (max-width:620px){
  .overall{display:none}
  .topbar{gap:10px;padding:10px 12px}
  main{padding:14px 12px 70px}
  .qbody{padding:15px 14px 17px}
}

/* save/sync strip */
.savebar{position:sticky;top:calc(env(safe-area-inset-top,0px) + 52px);z-index:19;
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  background:var(--panel);border-bottom:1px solid var(--line);padding:8px 16px;font-size:12.5px;color:var(--muted)}
.savebar .dot{width:9px;height:9px;border-radius:50%;background:var(--warn);flex:none}
.savebar.ok .dot{background:var(--right)}
.savebar.warn .dot{background:var(--wrong)}
.savebar #saveMsg{flex:1;min-width:180px}
.btn.sm{padding:4px 10px;font-size:12.5px;border-radius:7px}
label.btn.sm{display:inline-block;cursor:pointer}
@media (max-width:620px){ .savebar{top:auto;position:static} }

/* onboarding modal */
.modal{position:fixed;inset:0;z-index:60;display:grid;place-items:center;
  background:rgba(0,0,0,.45);padding:20px;animation:fade .18s ease}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;
  padding:28px 30px;max-width:520px;width:100%;animation:rise .22s cubic-bezier(.2,.8,.2,1)}
.modal-card h2{margin:0 0 10px;font-size:19px}
.modal-card p{margin:0 0 14px;color:var(--muted);font-size:14px;line-height:1.6}
.steps{margin:0 0 20px;padding-left:20px;color:var(--ink);font-size:14px;line-height:1.9}
.steps b{font-weight:650}
.modal-actions{display:flex;gap:10px;flex-wrap:wrap}
.fineprint{font-size:12px;color:var(--muted);margin-top:14px!important}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* smoother interactions */
.q{transition:border-color .18s ease, box-shadow .18s ease}
.q.open{box-shadow:0 1px 3px rgba(0,0,0,.06)}
.qhead{transition:background .14s ease}
.choice{transition:border-color .14s ease, background .14s ease, transform .08s ease}
.choice:active:not(:disabled){transform:scale(.995)}
.sol-body{animation:rise .2s ease}
.tab{transition:background .14s ease,color .14s ease}
.btn{transition:border-color .14s ease,color .14s ease,background .14s ease}
.daycell{transition:border-color .14s ease,transform .1s ease}
.daycell:hover{transform:translateY(-1px)}
.toast{animation:rise .2s ease}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

/* theme toggle */
.themebtn{background:none;border:1px solid var(--line);border-radius:999px;width:32px;height:32px;
  cursor:pointer;color:var(--muted);font-size:15px;line-height:1;flex:none}
.themebtn:hover{border-color:var(--accent);color:var(--accent)}

/* ---- Plan: readable week blocks instead of a cramped grid ---- */
.wk{background:var(--panel);border:1px solid var(--line);border-radius:14px;margin-bottom:18px;overflow:hidden}
.wk-head{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;gap:14px;align-items:flex-start;flex-wrap:wrap}
.wk-head .n{font-size:11px;letter-spacing:.9px;text-transform:uppercase;color:var(--accent);font-weight:700}
.wk-head h3{margin:2px 0 3px;font-size:17px;line-height:1.35}
.wk-head .goal{color:var(--muted);font-size:13.5px;max-width:64ch}
.wk-prog{margin-left:auto;text-align:right;min-width:130px}
.wk-prog .pct{font-size:20px;font-weight:700;font-variant-numeric:tabular-nums}
.wk-prog .sub{font-size:12px;color:var(--muted)}
.wk-prog .bar{width:130px;margin-top:6px}

.drow{display:grid;grid-template-columns:104px 1fr 132px 110px;gap:14px;align-items:center;
  padding:11px 20px;border-bottom:1px solid var(--line);cursor:pointer;transition:background .13s ease}
.drow:last-child{border-bottom:none}
.drow:hover{background:var(--bg)}
.drow.today{background:var(--accent-soft)}
.drow.done .dfocus{opacity:.55}
.dwhen{min-width:0}
.dwhen .dd{font-size:13.5px;font-weight:650}
.dwhen .dt{font-size:11.5px;color:var(--muted)}
.dfocus{font-size:13.5px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dcount{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;text-align:right}
.dbar{display:flex;align-items:center;gap:8px;justify-content:flex-end}
.dbar .bar{width:74px}
.dbar .pc{font-size:11.5px;color:var(--muted);min-width:30px;text-align:right;font-variant-numeric:tabular-nums}
.badge{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;
  padding:2px 7px;border-radius:5px;background:var(--warn);color:#fff;margin-right:7px}
.badge.light{background:var(--line);color:var(--muted)}
@media (max-width:760px){
  .drow{grid-template-columns:92px 1fr;row-gap:6px}
  .dcount,.dbar{grid-column:2;justify-content:flex-start;text-align:left}
}

/* ---- Focus mode: one question, full page ---- */
.focus{position:fixed;inset:0;z-index:45;background:var(--bg);display:flex;flex-direction:column}
.focus-bar{display:flex;align-items:center;gap:10px;padding:10px 18px;
  padding-top:calc(10px + env(safe-area-inset-top,0px));
  background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap}
.fx-pos{font-size:13.5px;font-weight:650;font-variant-numeric:tabular-nums}
.fx-meta{font-size:12px;color:var(--muted)}
.focus-body{flex:1;overflow-y:auto;padding:26px 20px 60px}
.focus-body .q{max-width:860px;margin:0 auto;border:none;background:none}
.focus-body .qhead{display:none}
.focus-body .qbody{padding:0}
.focus-body .stem{font-size:16.5px;line-height:1.7}
.focus-body .choice{padding:13px 16px;font-size:15px}
.fx-title{max-width:860px;margin:0 auto 18px;display:flex;gap:9px;align-items:center;flex-wrap:wrap}

/* mock note + extra practice */
.mocknote{background:var(--accent-soft);border:1px solid var(--accent);color:var(--accent);
  border-radius:10px;padding:11px 15px;margin-bottom:14px;font-size:13.5px;font-weight:600}
details.extra{margin-top:20px;border:1px dashed var(--line);border-radius:12px;background:var(--panel)}
details.extra>summary{cursor:pointer;padding:13px 18px;font-size:13.5px;color:var(--muted);list-style:none}
details.extra>summary::-webkit-details-marker{display:none}
details.extra>summary::before{content:'▸ ';display:inline-block;transition:transform .18s}
details.extra[open]>summary::before{content:'▾ '}
details.extra>summary:hover{color:var(--accent)}
.extra-body{padding:4px 12px 12px}
.themebtn.ok{color:var(--right);border-color:transparent;font-size:11px}
.themebtn.warn{color:var(--wrong);border-color:var(--wrong);font-size:11px}

/* ---- forum markup inside a solution ---- */
.sol-body .quotetitle{font-size:12px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.5px;margin:14px 0 0}
.sol-body .quotetitle::after{content:' wrote:';font-weight:400;text-transform:none;letter-spacing:0}
.sol-body .quotecontent{border-left:3px solid var(--line);background:var(--bg);
  border-radius:0 8px 8px 0;padding:11px 14px;margin:6px 0 14px;font-size:13.5px;color:var(--muted)}
.sol-body .quote-container{max-height:none!important;height:auto!important;overflow:visible!important;padding-bottom:0!important}
.sol-body .spoiler{border:1px solid var(--line);border-radius:8px;padding:10px 13px;margin:12px 0}
.sol-body .spoiler-title{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.sol-body .spoiler-box{margin-top:8px}
.sol-body img{border-radius:6px;margin:10px 0}
.sol-body table{border-collapse:collapse;margin:12px 0;font-size:13.5px}
.sol-body td,.sol-body th{border:1px solid var(--line);padding:5px 9px}
.sol-body hr{border:none;border-top:1px solid var(--line);margin:16px 0}
.sol-body p{margin:0 0 11px}
.sol-body a{color:var(--accent)}
.sol-wrap{overflow-x:auto}

/* ---- mock day: sections + timer ---- */
.mockhead{background:var(--panel);border:1px solid var(--warn);border-left-width:4px;
  border-radius:12px;padding:16px 20px;margin-bottom:16px}
.mockhead h3{margin:0 0 4px;font-size:16px}
.mockhead .sub{color:var(--muted);font-size:13.5px}
.sections{display:grid;gap:10px;margin-top:14px}
.sec{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:10px;
  padding:11px 15px;background:var(--bg);flex-wrap:wrap}
.sec .nm{font-weight:650;font-size:14px;min-width:120px}
.sec .qn{font-size:12.5px;color:var(--muted)}
.sec .spacer{flex:1}
.timer{font-variant-numeric:tabular-nums;font-size:19px;font-weight:700;min-width:74px;text-align:right}
.timer.run{color:var(--accent)}
.timer.low{color:var(--wrong)}
.timer.done{color:var(--muted)}
.sechead{font-size:13px;text-transform:uppercase;letter-spacing:.7px;color:var(--muted);
  margin:26px 0 10px;padding-bottom:7px;border-bottom:1px solid var(--line)}

/* star / note controls */
.iconbtn{background:none;border:1px solid transparent;border-radius:7px;padding:3px 8px;
  cursor:pointer;font-size:15px;line-height:1;color:var(--muted)}
.iconbtn:hover{border-color:var(--line);color:var(--accent)}
.iconbtn.on{color:var(--warn)}
.notewrap{margin-top:12px}
.note{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;
  background:var(--bg);color:var(--ink);font:inherit;font-size:13.5px;resize:vertical}
.note:focus{outline:none;border-color:var(--accent)}
.noterow{display:flex;align-items:center;gap:10px;margin-top:8px}
.notehint{font-size:12px;color:var(--right)}

/* error-log filters */
.filters{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}
.fchip{background:var(--panel);border:1px solid var(--line);border-radius:999px;
  padding:6px 13px;cursor:pointer;font-size:13px;color:var(--muted)}
.fchip:hover{border-color:var(--accent);color:var(--accent)}
.fchip.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:650}
.fchip b{font-variant-numeric:tabular-nums}

/* letter-only + self-graded question types */
.choices.letters{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}
.choices.letters .choice{justify-content:center;padding:13px 0;font-weight:700}
.choices.letters .ltr{min-width:auto}
.hint{font-size:12.5px;color:var(--muted);margin-top:10px}
.selfgrade{margin-top:18px}
.selfgrade .do-reveal{margin-top:10px}
.official{margin-top:14px;border:1px solid var(--line);border-radius:10px;padding:14px 16px;background:var(--bg)}
.oa-label{font-size:11px;font-weight:700;letter-spacing:.7px;text-transform:uppercase;color:var(--muted);margin-bottom:7px}
.oa-body{font-size:14.5px;line-height:1.6;overflow-wrap:anywhere}
.oa-body table{border-collapse:collapse;margin:8px 0}
.oa-body td,.oa-body th{border:1px solid var(--line);padding:4px 8px}
.gradebtns{display:flex;gap:9px;margin-top:14px;flex-wrap:wrap}

/* multi-part answer boxes (Graphs & Tables, Two-Part, Multi-Source) */
.parts{display:grid;gap:10px;margin:14px 0 4px}
.part{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:12px;align-items:center;
  border:1px solid var(--line);border-radius:10px;padding:10px 14px;background:var(--bg)}
.plabel{font-size:14px;line-height:1.5;color:var(--ink);overflow-wrap:anywhere}
.pin{font:inherit;font-size:15px;padding:9px 11px;border:1px solid var(--line);border-radius:8px;
  background:var(--panel);color:var(--ink);width:100%;box-sizing:border-box}
.pin:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.pin:disabled{opacity:.75}
.sgbtns{display:flex;gap:9px;margin-top:12px;flex-wrap:wrap}
@media (max-width:640px){.part{grid-template-columns:minmax(0,1fr)}}

.orow{display:flex;flex-wrap:wrap;gap:2px 14px;align-items:baseline;padding:6px 0}
.olab{flex:1 1 200px;min-width:150px;color:var(--muted);overflow-wrap:anywhere}
.oval{flex:1 1 240px;min-width:0;font-weight:650;color:var(--right);overflow-wrap:anywhere}

.yours{margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.yrow{display:flex;flex-wrap:wrap;gap:2px 12px;align-items:baseline;padding:6px 0;font-size:14px}
.yrow .ylab{flex:1 1 200px;min-width:150px}
.yrow .yval{flex:0 1 auto;min-width:0}
.ylab{color:var(--muted);overflow-wrap:anywhere}
.yval{font-weight:650}
.ymark{font-weight:700}
.yrow.ok .ymark,.yrow.ok .yval{color:var(--right)}
.yrow.no .ymark,.yrow.no .yval{color:var(--wrong)}

/* a written answer cannot be matched, so make the mark-it step impossible to miss */
.gradenote{margin-top:14px;font-size:13.5px;font-weight:650;color:var(--warn)}
.selfgrade.needs-mark .gradebtns .btn{border-color:var(--warn)}
.selfgrade.needs-mark .gradebtns{animation:nudge 1.1s ease-in-out 3}
@keyframes nudge{0%,100%{opacity:1}50%{opacity:.55}}

/* Most forum form controls are dead markup: leave them visible for layout but
   unclickable, so the answer boxes below are plainly the place to answer. */
.stem input,.stem select,.stem textarea{pointer-events:none;opacity:.5}

/* ...except on Data Insights questions, where the question's own radio table or
   drop-downs ARE the answer UI and get woken up. */
.stem.di-live input,.stem.di-live select{pointer-events:auto;opacity:1;cursor:pointer}
.stem.di-live input[type="radio"]{width:17px;height:17px;accent-color:var(--accent);margin:0}
.stem.di-live select{padding:5px 8px;border:1px solid var(--line);border-radius:7px;
  background:var(--panel);color:var(--ink);font:inherit;font-size:14px;min-width:96px}
.stem.di-live select:focus{outline:2px solid var(--accent);outline-offset:1px}
.stem.di-live td.dicell{text-align:center;vertical-align:middle;cursor:pointer}
.stem.di-live td.dicell:hover{background:var(--accent-soft)}
.stem.di-live input:disabled,.stem.di-live select:disabled{opacity:1;cursor:default}
.stem.di-live td.dicell:has(input:disabled):hover{background:none}
/* after checking: green marks the right cell, red the one she picked wrongly */
.stem.di-live td.di-right{background:var(--right-soft);box-shadow:inset 0 0 0 2px var(--right)}
.stem.di-live td.di-wrong{background:var(--wrong-soft);box-shadow:inset 0 0 0 2px var(--wrong)}
.stem.di-live select.di-right{border-color:var(--right);background:var(--right-soft)}
.stem.di-live select.di-wrong{border-color:var(--wrong);background:var(--wrong-soft)}

/* floating twin of the header button, for when that has scrolled away */
.jump{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:30;
  background:var(--accent);color:#fff;border:none;border-radius:999px;
  padding:12px 20px;font:inherit;font-size:14px;font-weight:650;cursor:pointer;
  box-shadow:0 4px 16px rgba(0,0,0,.22)}
.jump:hover{filter:brightness(1.08)}
.jump #jumpN{opacity:.8;font-weight:500}
.jump #jumpN:before{content:"· "}
@media (max-width:640px){.jump{right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));padding:11px 16px}}

/* where "Next unanswered" just landed */
.q.flash{box-shadow:0 0 0 3px var(--accent);transition:box-shadow .3s}
@media (prefers-reduced-motion:reduce){
  .selfgrade.needs-mark .gradebtns{animation:none}
  .q.flash{transition:none}
}
.do-grade.on{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:650}
.sub-inline{color:var(--muted);font-size:12px;font-weight:400}

/* Reading Comprehension: the passage a question belongs to, shown above it. */
.passage {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-2, var(--surface));
  margin: 0 0 18px;
  overflow: hidden;
}
.passage-head {
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.passage-body {
  padding: 14px 18px;
  max-height: 22em;
  overflow-y: auto;
  line-height: 1.7;
}
.passage-body p { margin: 0 0 1em; }

/* Week header: the factual line sits above the coaching note. */
.wk-sum {
  font-size: 13px;
  color: var(--muted);
  margin: 4px 0 8px;
  font-variant-numeric: tabular-nums;
}

/* A note above an explanation: missing, or shared across a passage set. */
.sol-note {
  font-size: 13px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  margin: 0 0 12px;
}
.sol-note a { color: inherit; }

/* Multi-Source Reasoning: the documents the question asks about. */
.srctabs { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 18px; overflow: hidden; }
.srctabs-bar { display: flex; gap: 2px; background: var(--surface); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.srctab {
  border: 0; background: transparent; cursor: pointer; font: inherit; font-size: 13px;
  padding: 9px 14px; color: var(--muted); border-bottom: 2px solid transparent;
}
.srctab.on { color: var(--ink); border-bottom-color: var(--accent, currentColor); font-weight: 600; }
.srcpane { display: none; padding: 14px 18px; max-height: 24em; overflow-y: auto; line-height: 1.65; }
.srcpane.on { display: block; }
.srcpane table { border-collapse: collapse; }
.srcpane td, .srcpane th { border: 1px solid var(--line); padding: 4px 8px; }