/* CICU Teaching Series — shared design system.
   Carried over from the prototypes so the deployed tools look like the rest of
   the division's material. */

:root{
  --bg:#F5F6F2; --ink:#1C2B2E; --red:#B23A2E; --teal:#2F6F62; --gold:#B8862E;
  --gray:#767F7C; --line:#D7D9D2; --card:#FFFFFF; --green:#3E7D5C;
  --soft-teal:rgba(47,111,98,0.08);
  --chip-lecture-bg:#E4EAF5; --chip-lecture-fg:#3B5B9E;
  --chip-case-bg:#F3EAD6;    --chip-case-fg:#8A6417;
  --chip-sim-bg:#F5E1DE;     --chip-sim-fg:#B23A2E;
  --chip-ok-bg:#E4EFE9;      --chip-ok-fg:#2F6F62;
  --chip-bad-bg:#F5E1DE;     --chip-bad-fg:#B23A2E;

  /* Chart series. Not the UI teal: at chroma 0.069 that colour reads as grey
     when used as a fill. These two steps pass the lightness band, chroma
     floor, CVD separation and contrast checks against this surface. */
  --series-pre:#B8862E;
  --series-post:#0F8A6E;
  --series-single:#0F8A6E;
  --grid:#E6E8E2;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#12211F; --ink:#E7ECE8; --card:#1B2F2C; --line:#2C433F; --gray:#8FA39C;
    --soft-teal:rgba(21,165,135,0.14);
    --chip-lecture-bg:#22364F; --chip-lecture-fg:#A8C2ED;
    --chip-case-bg:#3B3219;    --chip-case-fg:#E0BC6B;
    --chip-sim-bg:#42221F;     --chip-sim-fg:#E8A69C;
    --chip-ok-bg:#1D3D36;      --chip-ok-fg:#7FD3BC;
    --chip-bad-bg:#42221F;     --chip-bad-fg:#E8A69C;
    --series-pre:#BB8A30;
    --series-post:#15A587;
    --series-single:#15A587;
    --grid:#263B38;
  }
}
:root[data-theme="dark"]{
  --bg:#12211F; --ink:#E7ECE8; --card:#1B2F2C; --line:#2C433F; --gray:#8FA39C;
  --soft-teal:rgba(21,165,135,0.14);
  --series-pre:#BB8A30; --series-post:#15A587; --series-single:#15A587;
  --grid:#263B38;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);}
body{
  font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
.wrap{max-width:960px;margin:0 auto;padding:20px 16px 60px;}

header{padding:6px 0 18px;border-bottom:1px solid var(--line);margin-bottom:20px;}
.eyebrow{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--red);font-weight:600;margin-bottom:8px;}
h1{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:clamp(22px,5vw,30px);line-height:1.1;margin:0 0 8px;}
header p{font-size:13px;line-height:1.5;color:var(--gray);margin:0;max-width:66ch;}

.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-top:16px;}
.tab-btn{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:11px;padding:8px 14px;border-radius:20px;
  border:1px solid var(--line);background:var(--card);color:var(--gray);cursor:pointer;font-weight:600;}
.tab-btn.active{background:var(--ink);color:var(--bg);border-color:var(--ink);}
.tab-btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 18px;margin-bottom:16px;}
.card h2{font-family:'Fraunces',Georgia,serif;font-size:18px;font-weight:600;margin:0 0 4px;}
.card .sub{font-size:12px;color:var(--gray);margin:0 0 16px;line-height:1.5;}

.choice-row{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.choice{flex:1 1 200px;padding:12px;border-radius:9px;border:1.5px solid var(--line);background:var(--bg);
  cursor:pointer;text-align:left;color:var(--ink);font:inherit;}
.choice.selected{border-color:var(--teal);background:var(--soft-teal);}
.choice:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.choice .t{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:11px;font-weight:700;
  text-transform:uppercase;letter-spacing:.03em;}
.choice .d{font-size:11px;color:var(--gray);margin-top:3px;line-height:1.4;}

.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;margin-bottom:16px;}
@media (max-width:560px){.field-grid{grid-template-columns:1fr;}}
.field{display:flex;flex-direction:column;gap:4px;}
.field label{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--gray);}
.field input,.field select,.field textarea{font-family:'Inter',system-ui,sans-serif;font-size:13px;padding:8px 10px;
  border-radius:7px;border:1px solid var(--line);background:var(--bg);color:var(--ink);}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--teal);outline-offset:1px;}

.format-chip{display:inline-block;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;padding:3px 9px;
  border-radius:12px;font-weight:700;text-transform:uppercase;margin-left:8px;vertical-align:middle;}
.format-chip.lecture{background:var(--chip-lecture-bg);color:var(--chip-lecture-fg);}
.format-chip.case{background:var(--chip-case-bg);color:var(--chip-case-fg);}
.format-chip.sim{background:var(--chip-sim-bg);color:var(--chip-sim-fg);}

.obj-box{background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:12px 14px;margin-bottom:6px;}
.obj-box .t{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--teal);margin-bottom:8px;}
.obj-box .session-label{font-weight:700;font-size:11.5px;margin:10px 0 4px;}
.obj-box .session-label:first-of-type{margin-top:0;}
.obj-box ul{margin:0 0 10px;padding-left:18px;}
.obj-box ul:last-child{margin-bottom:0;}
.obj-box li{font-size:12px;line-height:1.6;margin-bottom:3px;}

.session-head{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--gray);border-top:1px solid var(--line);padding-top:14px;margin-top:6px;}
.question{border-top:1px solid var(--line);padding:16px 0;}
.question.first-of-session{border-top:none;padding-top:8px;}
.question .qtext{font-size:13.5px;font-weight:600;margin:0 0 10px;line-height:1.5;}
.opt-row{display:flex;flex-direction:column;gap:6px;}
.opt-label{display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:8px;border:1px solid var(--line);
  cursor:pointer;font-size:12.5px;background:var(--bg);}
.opt-label:hover{border-color:var(--teal);}
.opt-label.picked{border-color:var(--teal);background:var(--soft-teal);}
.opt-label input{accent-color:var(--teal);}
.opt-label:focus-within{outline:2px solid var(--teal);outline-offset:1px;}

.submit-btn{width:100%;padding:13px;border-radius:9px;border:none;background:var(--red);color:#fff;
  font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:12px;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;cursor:pointer;margin-top:6px;}
.submit-btn:disabled{background:var(--line);color:var(--gray);cursor:not-allowed;}
.ghost-btn{padding:9px 14px;border-radius:8px;border:1.5px solid var(--teal);background:transparent;color:var(--teal);
  font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:11px;font-weight:700;text-transform:uppercase;cursor:pointer;}
.submit-status{font-size:11.5px;color:var(--teal);margin-top:10px;text-align:center;min-height:16px;
  font-family:'IBM Plex Mono',ui-monospace,monospace;}
.submit-status.error{color:var(--red);}

.notice{border:1px solid var(--line);border-left:3px solid var(--gold);background:var(--bg);border-radius:8px;
  padding:11px 13px;font-size:12px;line-height:1.55;color:var(--gray);margin-bottom:14px;}

/* KPI tiles */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px;}
@media (max-width:640px){.kpi-grid{grid-template-columns:repeat(2,1fr);}}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 14px;}
.kpi .lbl{font-size:10px;color:var(--gray);font-family:'IBM Plex Mono',ui-monospace,monospace;margin-bottom:6px;}
.kpi .val{font-family:'Fraunces',Georgia,serif;font-size:22px;font-weight:600;}
.kpi .den{font-size:10px;color:var(--gray);font-family:'IBM Plex Mono',ui-monospace,monospace;margin-top:4px;}

/* Charts */
.legend{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:14px;}
.legend span{display:inline-flex;align-items:center;gap:6px;font-family:'IBM Plex Mono',ui-monospace,monospace;
  font-size:10.5px;color:var(--gray);}
.swatch{width:10px;height:10px;border-radius:3px;flex:0 0 auto;}
.swatch.pre{background:var(--series-pre);}
.swatch.post{background:var(--series-post);}

.bc-row{border-top:1px solid var(--line);padding:14px 0;}
.bc-row:first-of-type{border-top:none;padding-top:2px;}
.bc-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px;gap:10px;}
.bc-head .name{font-weight:700;font-size:12.5px;}
.bc-head .delta{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:11px;font-weight:700;white-space:nowrap;color:var(--gray);}
.bc-bars{display:flex;flex-direction:column;gap:2px;}
.bar-line{display:flex;align-items:center;gap:8px;}
.bar-line .bl{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;color:var(--gray);width:52px;flex:0 0 auto;}
.bar-track{flex:1;height:14px;background:var(--grid);border-radius:4px;overflow:hidden;}
.bar-fill{height:100%;border-radius:0 4px 4px 0;min-width:2px;}
.bar-fill.pre{background:var(--series-pre);}
.bar-fill.post{background:var(--series-post);}
.bar-fill.single{background:var(--series-single);}
.bar-line .pct{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;width:42px;text-align:right;color:var(--ink);}
.bc-note{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;color:var(--gray);margin-top:8px;}

.item-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line);}
.item-row:first-of-type{border-top:none;}
.item-row .n{font-size:11.5px;flex:0 0 auto;width:44%;line-height:1.4;}
@media (max-width:560px){.item-row{flex-wrap:wrap;} .item-row .n{width:100%;}}

.chip{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;padding:3px 8px;border-radius:12px;font-weight:600;
  white-space:nowrap;}
.chip.ok{background:var(--chip-ok-bg);color:var(--chip-ok-fg);}
.chip.bad{background:var(--chip-bad-bg);color:var(--chip-bad-fg);}
.chip.pre{background:var(--chip-case-bg);color:var(--chip-case-fg);}
.chip.post{background:var(--chip-ok-bg);color:var(--chip-ok-fg);}

table.log{width:100%;border-collapse:collapse;font-size:12px;}
table.log th{text-align:left;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;text-transform:uppercase;
  color:var(--gray);padding:8px;border-bottom:1px solid var(--line);white-space:nowrap;}
table.log td{padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top;}
table.log tr:last-child td{border-bottom:none;}
.empty-state{text-align:center;padding:36px 20px;color:var(--gray);font-size:13px;}

/* Result panel */
.result-box{background:var(--card);border:2px solid var(--teal);border-radius:12px;padding:22px 18px;text-align:center;margin-bottom:16px;}
.result-box .score{font-family:'Fraunces',Georgia,serif;font-size:38px;font-weight:600;color:var(--teal);line-height:1;}
.result-box .label{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:11px;color:var(--gray);margin-top:6px;}
.gain-row{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);}
.gain-row div{text-align:center;}
.gain-row .g-val{font-family:'Fraunces',Georgia,serif;font-size:20px;font-weight:600;}
.gain-row .g-lbl{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:9.5px;color:var(--gray);margin-top:3px;}

.review-item{border-top:1px solid var(--line);padding:13px 0;text-align:left;}
.review-item .rq{margin:0 0 5px;font-size:12.5px;font-weight:600;}
.review-item .ra{font-size:12px;margin-bottom:2px;}
.review-item .ra.correct{color:var(--green);}
.review-item .ra.incorrect{color:var(--red);}
.review-item .fix{color:var(--teal);font-size:12px;}
.review-item .exp{color:var(--gray);font-size:11.5px;margin-top:5px;line-height:1.55;}

footer{margin-top:30px;font-size:10.5px;color:var(--gray);text-align:center;
  font-family:'IBM Plex Mono',ui-monospace,monospace;line-height:1.7;}
footer a{color:var(--teal);}

#tip{position:fixed;pointer-events:none;opacity:0;transition:opacity .12s;background:var(--ink);color:var(--bg);
  font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:10.5px;padding:6px 9px;border-radius:6px;z-index:50;
  max-width:260px;line-height:1.5;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}