/* Y11 Syllabus Audit - Cambridge IGCSE Computer Science 0478 */

:root{
  --bg:#f4f6f9;
  --panel:#ffffff;
  --panel-2:#fbfcfd;
  --ink:#16202e;
  --ink-2:#4b5b70;
  --ink-3:#7b8a9e;
  --line:#dde3ea;
  --line-2:#eef2f6;
  --brand:#1f4e79;
  --brand-ink:#ffffff;
  --accent:#0d6e6e;
  --not:#c2453b;
  --cov:#2f7d32;
  --con:#1565c0;
  --not-bg:#fdeceb;
  --cov-bg:#e9f5ea;
  --con-bg:#e8f1fb;
  --warn-bg:#fff6e0;
  --warn-line:#e8c86a;
  --radius:10px;
  --shadow:0 1px 2px rgba(16,32,56,.06), 0 4px 14px rgba(16,32,56,.05);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#12161c;
    --panel:#1a2029;
    --panel-2:#1e242e;
    --ink:#e8edf3;
    --ink-2:#aab8c8;
    --ink-3:#7d8b9c;
    --line:#2c3540;
    --line-2:#232a34;
    --brand:#2d6fa8;
    --accent:#2aa6a6;
    --not:#f2837a;
    --cov:#6fca74;
    --con:#6fb3f2;
    --not-bg:#3a2220;
    --cov-bg:#1f3222;
    --con-bg:#1c2c3f;
    --warn-bg:#33290f;
    --warn-line:#6b5722;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 4px 14px rgba(0,0,0,.25);
  }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
.wrap{max-width:1000px;margin:0 auto;padding:0 16px 80px}

/* ---------- header ---------- */
.masthead{background:var(--brand);color:var(--brand-ink);padding:18px 0 20px;box-shadow:var(--shadow)}
.masthead .wrap{padding-bottom:0}
.masthead h1{margin:0;font-size:21px;letter-spacing:-.01em}
.masthead p{margin:4px 0 0;font-size:13.5px;opacity:.85}
.masthead nav{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap}
.masthead nav a{
  color:var(--brand-ink);text-decoration:none;font-size:13px;font-weight:600;
  padding:5px 11px;border-radius:99px;background:rgba(255,255,255,.14);
}
.masthead nav a:hover{background:rgba(255,255,255,.26)}
.masthead nav a[aria-current="page"]{background:#fff;color:var(--brand)}

/* ---------- panels ---------- */
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;margin:16px 0;
}
.panel > h2{margin:0 0 4px;font-size:17px}
.panel > h2 + p{margin:0 0 14px;color:var(--ink-2);font-size:13.5px}
.note{
  background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:8px;
  padding:11px 13px;font-size:13.5px;color:var(--ink);
}
.note strong{font-weight:700}
.muted{color:var(--ink-2)}
.small{font-size:13px}

/* ---------- form fields ---------- */
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}
.field label{font-weight:600;font-size:13.5px}
.field .hintline{font-size:12.5px;color:var(--ink-3)}
input[type=text],input[type=password],select{
  font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  background:var(--panel-2);color:var(--ink);width:100%;max-width:420px;
}
input[type=text]:focus,input[type=password]:focus,select:focus{
  outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand);
}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}

/* ---------- buttons ---------- */
.btn{
  font:inherit;font-weight:600;cursor:pointer;border-radius:8px;
  border:1px solid var(--line);background:var(--panel-2);color:var(--ink);
  padding:9px 15px;
}
.btn:hover{border-color:var(--ink-3)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{filter:brightness(1.1)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;filter:none}
.btn-sm{padding:5px 10px;font-size:12.5px;font-weight:600}
.btn-danger{color:var(--not);border-color:var(--not)}
.btn-link{background:none;border:none;color:var(--brand);text-decoration:underline;padding:0;cursor:pointer;font:inherit}

/* ---------- sticky progress bar ---------- */
.sticky{
  position:sticky;top:0;z-index:20;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:11px 14px;margin:16px 0;
}
.sticky .barrow{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.sticky .who{font-weight:700;font-size:14px;flex:1 1 auto;min-width:120px}
.meter{height:9px;background:var(--line-2);border-radius:99px;overflow:hidden;margin-top:9px}
.meter > i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.counts{font-size:12.5px;color:var(--ink-2);margin-top:6px}

/* ---------- topic / group structure ---------- */
.paperhead{
  margin:26px 0 6px;padding:9px 14px;border-radius:8px;
  background:var(--brand);color:#fff;font-weight:700;font-size:14px;letter-spacing:.02em;
}
.topic{margin:14px 0;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);overflow:hidden}
.topic > header{
  display:flex;align-items:center;gap:10px;padding:12px 14px;
  background:var(--panel-2);border-bottom:1px solid var(--line);cursor:pointer;
}
.topic > header:hover{background:var(--line-2)}
.topic > header .tnum{
  font:700 12px/1 var(--mono);background:var(--brand);color:#fff;
  padding:5px 7px;border-radius:5px;min-width:26px;text-align:center;
}
.topic > header h3{margin:0;font-size:15.5px;flex:1 1 auto}
.topic > header .tstat{font-size:12.5px;color:var(--ink-2);white-space:nowrap}
.topic > header .chev{color:var(--ink-3);font-size:12px;transition:transform .15s}
.topic.collapsed > header .chev{transform:rotate(-90deg)}
.topic.collapsed > .tbody{display:none}

.group{border-top:1px solid var(--line-2)}
.group:first-child{border-top:none}
.group > .ghead{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:10px 14px;background:var(--panel-2);
}
.group > .ghead h4{margin:0;font-size:13.5px;flex:1 1 220px}
.group > .ghead h4 span{font:600 12px/1 var(--mono);color:var(--ink-3);margin-right:7px}
.setall{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--ink-3)}
.setall .btn-sm{border-radius:6px}

/* ---------- outcome rows ---------- */
.outcome{
  display:flex;gap:14px;align-items:flex-start;justify-content:space-between;
  padding:11px 14px;border-top:1px solid var(--line-2);
}
.outcome:hover{background:var(--panel-2)}
.outcome.untouched{background:linear-gradient(90deg,var(--warn-bg) 0 4px,transparent 4px)}
.otext{flex:1 1 auto;min-width:0}
.otext .oid{font:600 11.5px/1 var(--mono);color:var(--ink-3);margin-right:8px}
.otext .omain{font-size:14px}
.otext .ohint{display:block;margin-top:3px;font-size:12.5px;color:var(--ink-3);line-height:1.45}

/* segmented 3-way control */
.seg{display:flex;flex:0 0 auto;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel-2)}
.seg label{
  position:relative;cursor:pointer;user-select:none;
  padding:7px 11px;font-size:12.5px;font-weight:600;color:var(--ink-2);
  border-left:1px solid var(--line);white-space:nowrap;text-align:center;min-width:74px;
}
.seg label:first-child{border-left:none}
.seg input{position:absolute;opacity:0;width:100%;height:100%;left:0;top:0;margin:0;cursor:pointer}
.seg label:hover{background:var(--line-2)}
.seg input:focus-visible + span{outline:2px solid var(--brand);outline-offset:2px;border-radius:3px}
.seg label:has(input[value="0"]:checked){background:var(--not-bg);color:var(--not)}
.seg label:has(input[value="1"]:checked){background:var(--cov-bg);color:var(--cov)}
.seg label:has(input[value="2"]:checked){background:var(--con-bg);color:var(--con)}

/* ---------- results ---------- */
.stats{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:4px}
.stat{
  flex:1 1 150px;background:var(--panel-2);border:1px solid var(--line);
  border-radius:8px;padding:12px 14px;
}
.stat b{display:block;font-size:26px;line-height:1.1;letter-spacing:-.02em}
.stat span{font-size:12.5px;color:var(--ink-2)}

.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-2);margin:10px 0 2px}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.sw-not{background:var(--not)}.sw-cov{background:var(--cov)}.sw-con{background:var(--con)}

.rrow{padding:9px 14px;border-top:1px solid var(--line-2);display:flex;gap:14px;align-items:center}
.rrow:hover{background:var(--panel-2)}
.rlabel{flex:1 1 auto;min-width:0;font-size:13.5px}
.rlabel .oid{font:600 11.5px/1 var(--mono);color:var(--ink-3);margin-right:8px}
.rbar{flex:0 0 240px;display:flex;height:19px;border-radius:5px;overflow:hidden;background:var(--line-2)}
.rbar i{display:block;height:100%}
.rbar .b-not{background:var(--not)}.rbar .b-cov{background:var(--cov)}.rbar .b-con{background:var(--con)}
.rpct{flex:0 0 54px;text-align:right;font:700 13px var(--mono)}
.rpct.lo{color:var(--not)}.rpct.mid{color:#b07d17}.rpct.hi{color:var(--cov)}

table.grid{border-collapse:collapse;width:100%;font-size:13px}
table.grid th,table.grid td{border:1px solid var(--line);padding:7px 9px;text-align:left;vertical-align:top}
table.grid th{background:var(--panel-2);font-size:12.5px;position:sticky;top:0}
table.grid tr:nth-child(even) td{background:var(--panel-2)}
.scrollx{overflow-x:auto;border:1px solid var(--line);border-radius:8px}

.pill{display:inline-block;padding:2px 8px;border-radius:99px;font-size:11.5px;font-weight:700}
.pill-not{background:var(--not-bg);color:var(--not)}
.pill-cov{background:var(--cov-bg);color:var(--cov)}
.pill-con{background:var(--con-bg);color:var(--con)}

.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:12px}
.toolbar .grow{flex:1 1 auto}

.empty{text-align:center;padding:36px 16px;color:var(--ink-3)}
.spinner{text-align:center;padding:30px;color:var(--ink-3);font-size:13.5px}
.errbox{background:var(--not-bg);border:1px solid var(--not);color:var(--not);border-radius:8px;padding:11px 13px;font-size:13.5px;margin:12px 0}
.okbox{background:var(--cov-bg);border:1px solid var(--cov);color:var(--cov);border-radius:8px;padding:11px 13px;font-size:13.5px;margin:12px 0}

.hidden{display:none !important}

footer.foot{text-align:center;color:var(--ink-3);font-size:12px;padding:26px 16px 10px}

/* ---------- small screens ---------- */
@media (max-width:640px){
  /* topic headers carry a bar + score on the results pages - let them wrap */
  .topic > header{flex-wrap:wrap}
  .topic > header h3{flex:1 1 auto;min-width:0;font-size:14.5px}
  .topic > header .rbar{flex:1 1 100%;order:5;flex-basis:100%}
  .topic > header .tstat{font-size:11.5px}
  .outcome{flex-direction:column;gap:9px}
  .seg{width:100%}
  .seg label{flex:1 1 0;min-width:0;padding:12px 4px}
  .rbar{flex-basis:120px}
  .masthead h1{font-size:18px}
}

@media print{
  .masthead nav,.toolbar,.sticky,.btn{display:none !important}
  body{background:#fff}
  .panel,.topic{box-shadow:none;break-inside:avoid}
}

/* JS-applied fallback for browsers without :has() support */
.seg label.sel-0{background:var(--not-bg);color:var(--not)}
.seg label.sel-1{background:var(--cov-bg);color:var(--cov)}
.seg label.sel-2{background:var(--con-bg);color:var(--con)}