:root{
  --navy:#305888; --navy-d:#24446a; --ink:#2B3440; --body:#5E5E5E;
  --gold:#C8A96B; --pale:#C9D6E6; --soft:#E2E9F2; --grey:#F1F4F6;
  --line:#DDE3EA; --white:#fff; --good:#3F7A4E; --bad:#A3453C;
  --sans:'Satoshi',-apple-system,'Segoe UI',Helvetica,sans-serif;
  --serif:Georgia,'Times New Roman',serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--grey);color:var(--ink);font:400 17px/1.6 var(--sans)}

/* ---------------------------------------------------------- topbar --- */
.topbar{background:var(--navy);color:#fff;padding:14px 22px;display:flex;
  align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;
  font:700 18px/1 var(--serif);letter-spacing:.2px}
.brand svg{width:26px;height:26px;fill:none;stroke:var(--pale);stroke-width:1.8;
  stroke-linejoin:round;stroke-linecap:round}
.topbar nav{display:flex;align-items:center;gap:16px;font-size:15px}
.topbar .who{color:var(--pale)}
.topbar nav a{color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.45);padding-bottom:1px}
.topbar nav a:hover{border-color:#fff}

main{max-width:780px;margin:0 auto;padding:34px 20px 10px}
body.narrow main{max-width:520px;padding-top:56px}
footer{max-width:780px;margin:0 auto;padding:34px 20px 46px;color:#8A9099;
  font-size:13.5px;line-height:1.7;border-top:1px solid var(--line);margin-top:38px}

/* ------------------------------------------------------- type ------- */
h1{font:700 32px/1.25 var(--serif);color:var(--navy);margin:0 0 14px;letter-spacing:-.2px}
h2{font:700 21px/1.3 var(--serif);color:var(--navy);margin:0 0 10px}
h3{font:700 19px/1.35 var(--serif);color:var(--ink);margin:0 0 8px}
h2.sect{margin:38px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--soft)}
p{margin:0 0 14px}
.lead{color:var(--body);margin:0 0 18px}
.lead.big{font-size:17.5px;background:var(--soft);border-left:3px solid var(--navy);
  padding:15px 18px;border-radius:0 4px 4px 0;color:var(--ink)}
.fine{font-size:14px;color:#8A9099;margin:16px 0 0}
.meta{font-size:14.5px;color:var(--body);margin:0 0 12px}
.srcnote{font-size:12.5px;color:#9AA1A9;line-height:1.6;margin:30px 0 0;font-style:italic}

/* ------------------------------------------------------ cards ------- */
.card{background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:26px 28px;margin:0 0 18px;box-shadow:0 1px 2px rgba(43,52,64,.04)}
.card.empty{text-align:center;color:var(--body)}
.card.empty h2{margin-bottom:6px}
.card.task{border-left:4px solid var(--navy)}
.card.done{border-left:4px solid var(--pale)}
.card.thanks{text-align:center;padding:44px 30px}
.card.next{background:var(--soft);border-color:var(--pale)}
.card.next p{color:var(--ink)}
.card.rightlist{padding:18px 24px;color:var(--body)}
.card.submitrow{text-align:center;border-top:3px solid var(--navy)}

.tag{display:inline-block;font:500 11.5px/1 var(--sans);letter-spacing:.9px;
  text-transform:uppercase;padding:5px 9px;border-radius:3px;margin-bottom:11px}
.tag-test{background:var(--navy);color:#fff}
.tag-form{background:var(--gold);color:#3A2E17}
.from-vineet{font-size:15.5px;color:var(--ink);background:var(--grey);
  padding:11px 14px;border-radius:4px;margin:0 0 16px}

/* ------------------------------------------------------ forms ------- */
label{display:block;font:500 14.5px/1.4 var(--sans);color:var(--ink);margin:0 0 7px}
input[type=text],input[type=email],select,textarea{width:100%;font:400 16.5px/1.5 var(--sans);
  color:var(--ink);background:#fff;border:1px solid #C6CDD6;border-radius:4px;padding:12px 13px}
textarea{resize:vertical;min-height:110px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--navy);
  box-shadow:0 0 0 3px rgba(48,88,136,.14)}
.codebox{letter-spacing:9px;font-size:26px;text-align:center;font-family:var(--serif)}
button,.btn{display:inline-block;font:500 16px/1 var(--sans);cursor:pointer;
  background:var(--navy);color:#fff;border:1px solid var(--navy);border-radius:4px;
  padding:14px 24px;text-decoration:none;margin-top:16px;transition:background .15s}
button:hover,.btn:hover{background:var(--navy-d);border-color:var(--navy-d)}
.btn.ghost{background:#fff;color:var(--navy)}
.btn.ghost:hover{background:var(--soft)}
.big-btn{padding:16px 40px;font-size:17px}

.autosave{font-size:13.5px;color:#8A9099;margin:0 0 22px}
.autosave.ok{color:var(--good)}
.autosave.bad{color:var(--bad);font-weight:500}

/* --------------------------------------------------- questions ------ */
.qcard{background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:24px 26px 20px;margin:0 0 16px;box-shadow:0 1px 2px rgba(43,52,64,.04)}
.qnum{font:500 12px/1 var(--sans);letter-spacing:1.1px;text-transform:uppercase;
  color:var(--navy);margin:0 0 14px}
.qnum .opt{color:#9AA1A9;text-transform:none;letter-spacing:0;font-style:italic}
.qnum .x{color:var(--bad);margin-left:6px}
.qbody{font:400 16.5px/1.65 var(--sans);color:var(--ink);margin:0 0 18px;white-space:normal}
.qimg{margin:0 0 18px}
.qimg img{max-width:100%;height:auto;border:1px solid var(--line,#d9d5cb);border-radius:6px;display:block}
.opt-row{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;margin:0 0 8px;
  border:1px solid var(--line);border-radius:5px;cursor:pointer;font-weight:400;
  font-size:16px;line-height:1.55;color:var(--ink);transition:background .12s,border-color .12s}
.opt-row:hover{background:#FAFCFE;border-color:var(--pale)}
.opt-row input{margin:4px 0 0;accent-color:var(--navy);flex:0 0 auto;width:18px;height:18px}
.opt-row:has(input:checked){background:var(--soft);border-color:var(--navy)}

/* ----------------------------------------------------- results ------ */
.scorewrap{display:flex;gap:16px;flex-wrap:wrap;margin:0 0 8px}
.scorebox{flex:1 1 220px;background:var(--navy);color:#fff;border-radius:6px;
  padding:26px 28px;text-align:center}
.scorebox .big{font:700 58px/1 var(--serif);letter-spacing:-1px}
.scorebox .of{font-size:26px;color:var(--pale);letter-spacing:0}
.scorebox .bandword{margin-top:10px;font:500 13px/1 var(--sans);letter-spacing:2px;
  text-transform:uppercase;color:var(--gold)}
.timebox{flex:1 1 220px;background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:26px 28px;text-align:center}
.timebox .lbl{font:500 12px/1 var(--sans);letter-spacing:1.2px;text-transform:uppercase;color:var(--navy)}
.timebox .val{font:700 34px/1.2 var(--serif);color:var(--ink);margin:12px 0 10px}
.timebox .lbl2{font-size:13.5px;color:#8A9099;line-height:1.5}

.bars{background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px 26px}
.bar{margin:0 0 22px}
.bar:last-child{margin:0}
.barhead{display:flex;justify-content:space-between;align-items:baseline;
  font-size:15.5px;color:var(--ink);margin:0 0 8px}
.barhead b{font-family:var(--serif);font-size:17px;color:var(--navy)}
.track{height:11px;background:var(--grey);border-radius:6px;overflow:hidden}
.fill{height:100%;background:var(--navy);border-radius:6px}
.barfoot{font-size:13px;color:var(--body);margin-top:6px}

.qcard.review{border-left:4px solid var(--bad)}
.qcard.review .you,.qcard.review .right{font-size:15.5px;line-height:1.6;
  margin:0 0 10px;padding-left:14px;border-left:2px solid var(--line)}
.qcard.review .right{border-left-color:var(--good);color:var(--ink)}
.qcard .lbl{display:block;font:500 11.5px/1 var(--sans);letter-spacing:1.1px;
  text-transform:uppercase;color:#8A9099;margin:0 0 5px}
.qcard.review .right .lbl{color:var(--good)}
/* ---- the whole paper, shown back after submitting ---- */
.hint{font-size:15px;line-height:1.6;color:#6B7480;margin:-6px 0 18px}
.qcard.full{border-left:4px solid var(--line)}
.qcard.full.good{border-left-color:var(--good)}
.qcard.full.review{border-left-color:var(--bad)}
.qnum .tick{color:var(--good);margin-left:6px}
.opt-row.static{cursor:default;align-items:baseline;background:#fff}
.opt-row.static:hover{background:#fff;border-color:var(--line)}
.opt-row.static .mark{flex:0 0 18px;font-size:15px;line-height:1.55;color:#C4C9CF;
  text-align:center;font-weight:700}
.opt-row.static .otext{flex:1 1 auto;min-width:0}
.opt-row.static .tag{flex:0 0 auto;font:500 11px/1.5 var(--sans);letter-spacing:.8px;
  text-transform:uppercase;color:#8A9199;padding-top:3px;white-space:nowrap}
.opt-row.static.opt-right{background:#F4FAF5;border-color:var(--good)}
.opt-row.static.opt-right .mark{color:var(--good)}
.opt-row.static.opt-right .tag{color:var(--good)}
.opt-row.static.opt-mine{background:#FDF5F5;border-color:var(--bad)}
.opt-row.static.opt-mine .mark{color:var(--bad)}
.opt-row.static.opt-mine .tag{color:var(--bad)}
.skipped{font-size:15px;color:var(--bad);margin:0 0 10px;font-style:italic}
.you-wrote{background:var(--soft);border-radius:5px;padding:14px 16px;margin:4px 0 0}
.you-wrote .lbl{display:block;font:500 11px/1 var(--sans);letter-spacing:1.1px;
  text-transform:uppercase;color:var(--navy);margin-bottom:7px}
.you-wrote p{margin:0;font-size:16px;line-height:1.65;color:var(--ink)}
@media (max-width:600px){
  .opt-row.static{flex-wrap:wrap}
  .opt-row.static .tag{flex:1 1 100%;padding-left:30px;padding-top:5px}
}

.why{background:var(--soft);border-radius:5px;padding:16px 18px;margin-top:16px}
.why .lbl{color:var(--navy);margin-bottom:7px}
.why p{margin:0;font-size:16px;line-height:1.68;color:var(--ink)}

@media (max-width:600px){
  main{padding:24px 15px 6px}
  body.narrow main{padding-top:34px}
  h1{font-size:26px}
  .card,.qcard{padding:20px 18px}
  .scorebox .big{font-size:48px}
  .big-btn{width:100%}
}

/* ------------------------------------------- one question at a time --- */
/* With JavaScript off, .paged is never added and the whole paper shows. */
.paged .qcard{display:none}
.paged .qcard.current{display:block}

.pager-top{position:sticky;top:0;z-index:20;background:var(--grey);
  padding:12px 0 10px;margin-bottom:4px;border-bottom:1px solid var(--line)}
.pager-line{display:flex;align-items:baseline;justify-content:space-between;
  gap:12px;flex-wrap:wrap;margin-bottom:8px}
.pager-count{font:700 17px/1.2 var(--sans);color:var(--navy)}
.pager-left{font-size:14px;color:var(--body)}

.pbar{height:5px;border-radius:3px;background:var(--soft);overflow:hidden}
.pbar-fill{height:100%;width:0;background:var(--navy);border-radius:3px;
  transition:width .25s ease}

.qjump{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;
  max-height:84px;overflow-y:auto;padding-right:2px}
.qdot{min-width:32px;height:32px;padding:0 5px;border:1px solid var(--line);
  border-radius:7px;background:var(--white);color:var(--body);cursor:pointer;
  font:600 13px/1 var(--sans);transition:background .15s,border-color .15s,color .15s}
.qdot:hover{border-color:var(--navy);color:var(--navy)}
.qdot.done{background:var(--soft);border-color:var(--pale);color:var(--navy-d)}
.qdot.here{background:var(--navy);border-color:var(--navy);color:#fff}
.qdot:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

.pager-nav{display:flex;gap:12px;justify-content:space-between;
  align-items:center;margin:18px 0 4px}
.pager-nav .btn{min-width:132px;text-align:center}
.pager-nav .btn:disabled{opacity:.4;cursor:not-allowed}

.fine.warn{color:var(--bad);font-weight:600}

@media (max-width:560px){
  .qdot{min-width:30px;height:30px;font-size:12px}
  /* keep the question list from pushing the question itself off the screen */
  .qjump{max-height:74px}
  .pager-nav .btn{min-width:0;flex:1}
}
@media (prefers-reduced-motion:reduce){
  .pbar-fill{transition:none}
}

/* ============================================ the LMS: home, classroom */

/* Moving between the Classroom and the Tests from the top bar. */
.topbar nav .navlink{border-bottom-color:transparent;padding:3px 0}
.topbar nav .navlink.on{border-bottom:2px solid #fff;font-weight:500}

/* The two boxes on the landing page. */
.tiles{display:grid;gap:18px;margin:26px 0 8px}
.tiles.two{grid-template-columns:1fr 1fr}
.tile{display:block;background:#fff;border:1px solid var(--line);border-radius:6px;
  padding:26px 26px 22px;text-decoration:none;color:inherit;
  border-top:4px solid var(--navy);transition:box-shadow .15s,transform .15s}
.tile:hover{box-shadow:0 6px 20px rgba(48,88,136,.14);transform:translateY(-2px)}
.tile-kicker{display:block;font:500 11.5px/1 var(--sans);letter-spacing:1.1px;
  text-transform:uppercase;color:var(--body);margin-bottom:9px}
.tile h2{margin:0 0 8px}
.tile p{margin:0 0 4px;color:var(--body);font-size:16px}
.tile-stat{margin-top:14px !important;padding-top:12px;border-top:1px solid var(--line);
  font-size:15px;color:var(--ink)}
.tile-stat strong{color:var(--navy)}

/* The seven parts of the course. */
.seclist{list-style:none;margin:24px 0 0;padding:0;counter-reset:none}
.seclist li{margin:0 0 10px}
.secrow{display:flex;align-items:center;gap:16px;background:#fff;
  border:1px solid var(--line);border-radius:6px;padding:16px 18px;
  text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.secrow:hover{border-color:var(--navy);box-shadow:0 3px 12px rgba(48,88,136,.10)}
.secrow.quiet{background:#FAFBFC}
.secno{flex:0 0 34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font:700 15px/1 var(--sans)}
.secrow.quiet .secno{background:var(--pale);color:var(--ink)}
.secbody{flex:1 1 auto;min-width:0}
.secbody strong{display:block;font:700 17.5px/1.3 var(--serif);color:var(--ink)}
.secmeta{display:block;font-size:14.5px;color:var(--body);margin-top:3px}
.pill{flex:0 0 auto;background:var(--gold);color:#3A2E17;border-radius:20px;
  padding:5px 12px;font:500 13px/1 var(--sans);white-space:nowrap}

/* Where you are. */
.crumb{font-size:14.5px;color:var(--body);margin:0 0 12px}
.crumb a{color:var(--navy)}

/* Extra labels the Classroom needs. */
.tag-read{background:var(--soft);color:var(--navy);border:1px solid var(--pale)}
.tag-do{background:var(--gold);color:#3A2E17}
.tag-ok{background:var(--good);color:#fff}

/* Slides shown in the page. */
.viewer{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;margin:16px 0 8px}
.viewer iframe{display:block;width:100%;height:min(72vh,660px);border:0}

/* What the student handed in, read back to them. */
.wrote{white-space:normal;background:var(--grey);border-left:3px solid var(--pale);
  padding:14px 16px;border-radius:0 4px 4px 0;margin:10px 0;font-size:16px;color:var(--ink)}
.backrow{margin-top:26px}

@media (max-width:700px){
  .tiles.two{grid-template-columns:1fr}
  .topbar nav{gap:11px;font-size:14px;flex-wrap:wrap}
  .topbar .who{display:none}
  .secrow{padding:14px}
  .secno{flex-basis:28px;height:28px;font-size:14px}
  .secbody strong{font-size:16.5px}
  .viewer iframe{height:56vh}
}

/* The slides of a session, shown as pictures so they work on any phone. */
h2.sect:has(.slidecount){display:flex;align-items:baseline;justify-content:space-between;gap:14px}
.sect .slidecount{font:400 14px/1.5 var(--sans);color:var(--body);white-space:nowrap}
.slides{margin:14px 0 6px}
.slide{margin:0 0 16px;background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.slide img{display:block;width:100%;height:auto}
.slide figcaption{font:400 13px/1 var(--sans);color:var(--body);
  padding:8px 12px;border-top:1px solid var(--line);text-align:right}

/* ------------------------------------------- handing in a file or link --- */
/* A refusal the student needs to read before anything else on the page. */
.warn{background:#FBF3E7;border-left:3px solid var(--gold);padding:12px 15px;
  border-radius:0 4px 4px 0;margin:0 0 14px;font-size:16px;color:var(--ink)}

/* The quiet divider between typing an answer and attaching one. */
.orline{margin:20px 0 14px;font-size:14px;color:var(--body);text-transform:uppercase;
  letter-spacing:.7px;display:flex;align-items:center;gap:12px}
.orline::before,.orline::after{content:'';flex:1;height:1px;background:var(--line)}

.handrow{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.handrow p{margin:0}
.handrow label{display:block;font-weight:700;font-size:15px;margin-bottom:6px}
.handrow input[type=file],.handrow input[type=url]{width:100%;font:400 15px/1.4 var(--sans);
  padding:10px 11px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink)}
.handrow input[type=file]{padding:8px 9px}
.handrow input[type=url]:focus{outline:2px solid var(--pale);outline-offset:1px;border-color:var(--navy)}
.handrow .hint{display:block;margin-top:6px;font-size:13.5px;line-height:1.5;color:var(--body)}

@media (max-width:700px){
  .handrow{grid-template-columns:1fr;gap:16px}
}