:root{
  --bg:#EDF2F3; --surface:#FFFFFF; --ink:#15252C; --muted:#566870; --line:#D2DCDF;
  --accent:#1B5A61; --accent-ink:#FFFFFF; --accent-soft:#DCEBEC;
  --ok:#1E7446; --ok-bg:#E2F1E7; --bad:#A93A2A; --bad-bg:#F7E3DF; --warn:#8A5A00;
  --font:"Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --display:"Bricolage Grotesque", "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --pattern:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100'%3E%3Cpath d='M28 66L0 50L0 16L28 0L56 16L56 50L28 66L28 100' fill='none' stroke='%231B5A61' stroke-opacity='0.07' stroke-width='1.2'/%3E%3Cpath d='M28 0L28 34L0 50L0 84L28 100L56 84L56 50L28 34' fill='none' stroke='%231B5A61' stroke-opacity='0.05' stroke-width='1.2'/%3E%3C/svg%3E");
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0E181C; --surface:#152329; --ink:#E4ECEE; --muted:#93A6AD; --line:#27393F;
    --accent:#72BCC3; --accent-ink:#0E181C; --accent-soft:#1C3439;
    --ok:#74CC98; --ok-bg:#15321F; --bad:#F29482; --bad-bg:#3A1D18; --warn:#E3B55A;
    --pattern:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100'%3E%3Cpath d='M28 66L0 50L0 16L28 0L56 16L56 50L28 66L28 100' fill='none' stroke='%2372BCC3' stroke-opacity='0.07' stroke-width='1.2'/%3E%3Cpath d='M28 0L28 34L0 50L0 84L28 100L56 84L56 50L28 34' fill='none' stroke='%2372BCC3' stroke-opacity='0.05' stroke-width='1.2'/%3E%3C/svg%3E");
  }
}
:root[data-theme="dark"]{
  --bg:#0E181C; --surface:#152329; --ink:#E4ECEE; --muted:#93A6AD; --line:#27393F;
  --accent:#72BCC3; --accent-ink:#0E181C; --accent-soft:#1C3439;
  --ok:#74CC98; --ok-bg:#15321F; --bad:#F29482; --bad-bg:#3A1D18; --warn:#E3B55A;
    --pattern:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100'%3E%3Cpath d='M28 66L0 50L0 16L28 0L56 16L56 50L28 66L28 100' fill='none' stroke='%2372BCC3' stroke-opacity='0.07' stroke-width='1.2'/%3E%3Cpath d='M28 0L28 34L0 50L0 84L28 100L56 84L56 50L28 34' fill='none' stroke='%2372BCC3' stroke-opacity='0.05' stroke-width='1.2'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg) var(--pattern);background-attachment:fixed;color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.55}
button,select,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.wrap{max-width:820px;margin:0 auto;padding:28px 20px 64px}
h1,h2,h3{line-height:1.2;margin:0;font-family:var(--display);letter-spacing:-0.01em}
p{margin:0}
.muted{color:var(--muted)}
.small{font-size:14.5px}

/* Subject badge: hexagonal cell with a drawn subject icon */
.ico{--c:#888;width:34px;height:39px;flex:none;display:inline-grid;place-items:center;
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);
  background:color-mix(in srgb,var(--c) 17%, var(--surface));color:var(--c)}
.ico svg{width:58%;height:58%}
.ico.lg{width:46px;height:53px}
.ico.sm{width:26px;height:30px}
.ico.sm svg{width:62%;height:62%}

/* Hero */
.hero{--ink:#E4ECEE;--muted:#A7B8BE;color:var(--ink);display:grid;gap:28px;align-items:center;margin-bottom:30px;
  padding:34px 34px 30px;border-radius:22px;
  background:#0E181C url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100'%3E%3Cpath d='M28 66L0 50L0 16L28 0L56 16L56 50L28 66L28 100' fill='none' stroke='%2372BCC3' stroke-opacity='0.08' stroke-width='1.2'/%3E%3Cpath d='M28 0L28 34L0 50L0 84L28 100L56 84L56 50L28 34' fill='none' stroke='%2372BCC3' stroke-opacity='0.06' stroke-width='1.2'/%3E%3C/svg%3E")}
.hero .hexwrap{filter:drop-shadow(0 3px 0 rgba(0,0,0,.45))}
.brand{grid-column:1 / -1;display:flex;align-items:center;gap:18px}
.logo-mark{width:84px;height:84px;flex:none}
.tag{margin-top:8px;font-size:15px;color:var(--muted);letter-spacing:.01em}
@media (min-width:760px){.hero{grid-template-columns:minmax(0,1fr) auto}}
.nest{width:calc(3 * var(--hw) + 2 * var(--gap))}
.word{font-family:var(--display);font-size:clamp(46px,10vw,74px);font-weight:800;letter-spacing:-0.045em;line-height:.9;color:#E4ECEE}
.word span{color:#72BCC3}
.lede{font-size:18px;max-width:30em;color:#D3DEE1}
.bankline{margin-top:10px}

/* The nest: a honeycomb of subjects */
.nest{--hw:108px;--hh:calc(var(--hw) * 1.1547);--gap:8px;display:flex;flex-direction:column;align-items:flex-start;padding:6px 0}
.nest-row{display:flex;gap:var(--gap)}
.nest-row + .nest-row{margin-top:calc(var(--hh) * -0.25 + var(--gap) * 0.866)}
.nest-row.offset{margin-left:calc((var(--hw) + var(--gap)) / 2)}
.hexwrap{filter:drop-shadow(0 2px 0 color-mix(in srgb,var(--ink) 18%, transparent))}
.hexwrap:focus-within{filter:drop-shadow(0 0 0 var(--ink)) drop-shadow(0 0 2px var(--ink)) drop-shadow(0 0 2px var(--ink))}
.hexbtn{--c:#888;width:var(--hw);height:var(--hh);border:0;padding:0 12px;
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);
  background:linear-gradient(155deg, color-mix(in srgb,var(--c) 78%, #fff) 0%, var(--c) 62%, color-mix(in srgb,var(--c) 82%, #000) 100%);
  color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  font:700 13px/1.12 var(--display);text-align:center;transition:transform .15s ease}
.hexbtn svg{width:36px;height:36px;flex:none}
.hexbtn:hover{transform:translateY(-2px) scale(1.03)}
.hexbtn:focus-visible{outline:none}
.nest-note{margin-top:10px;font-size:14px;color:var(--muted)}
@media (max-width:759px){.hero > div:last-child{justify-self:center}.nest-note{text-align:center}}

/* Buttons */
.btn{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:11px 18px;font-weight:700;line-height:1.2}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{background:transparent;border-color:transparent;padding-left:6px;padding-right:6px;color:var(--accent)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.actions{display:flex;flex-wrap:wrap;gap:10px}

/* Subject list */
.section{margin-top:36px}
.section>h2{font-size:21px;margin-bottom:6px}
.section>p{margin-bottom:14px}
.subjects{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.subjects li+li{border-top:1px solid var(--line)}
.subj{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;width:100%;text-align:left;border:0;background:none;padding:14px 16px}
.subj:hover{background:var(--accent-soft)}
.subj .name{font-weight:700;display:block}
.meter{display:block;height:5px;border-radius:3px;background:var(--line);margin-top:7px;overflow:hidden;max-width:260px}
.meter i{display:block;height:100%;background:var(--c)}
.subj .count{font-size:14.5px;color:var(--muted);text-align:right;white-space:nowrap}

/* Panel */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px}
.field{margin-bottom:20px}
.field>.label{font-weight:700;margin-bottom:8px;display:block}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:6px 14px 6px 7px;font-size:15px}
.chip[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);font-weight:700}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;flex-wrap:wrap}
.seg button{border:0;background:var(--surface);padding:9px 16px}
.seg button+button{border-left:1px solid var(--line)}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);font-weight:700}
.hint{font-size:14.5px;color:var(--muted);margin-top:6px}
select{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:10px 12px;max-width:100%}

/* Quiz */
.qbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.progress{height:4px;background:var(--line);border-radius:2px;overflow:hidden;margin-bottom:22px}
.progress i{display:block;height:100%;background:var(--accent);transition:width .25s}
.timer{font-variant-numeric:tabular-nums;font-weight:700}
.timer.low{color:var(--bad)}
.qcard{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px 20px;border-top:6px solid var(--c)}
.qcard > *{position:relative}
.qcard > .wm{position:absolute;right:-26px;top:-18px;width:150px;height:150px;color:var(--c);opacity:.08;pointer-events:none}
.qcard > .wm svg{width:100%;height:100%}
.spec{margin-left:auto;display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:3px 9px 3px 7px;background:var(--surface);font-variant-numeric:tabular-nums}
.spec .bars{width:40px;height:14px;opacity:.75;
  background:repeating-linear-gradient(90deg,var(--ink) 0 1px,transparent 1px 3px,var(--ink) 3px 5px,transparent 5px 6px,var(--ink) 6px 7px,transparent 7px 10px)}
.qmeta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;font-size:14.5px;color:var(--muted)}
.badge{font-size:13px;border:1px solid var(--line);border-radius:6px;padding:1px 7px;color:var(--warn)}
.stem{font-family:var(--font);letter-spacing:0;font-size:20px;line-height:1.45;margin-bottom:20px}
.opts{display:grid;gap:10px}
.opt{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:start;text-align:left;border:1px solid var(--line);background:var(--bg);border-radius:10px;padding:12px 14px;line-height:1.45}
.opt .k{width:28px;height:28px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:14px;background:var(--surface)}
.opt:not(:disabled):hover{border-color:var(--accent)}
.opt.sel{border-color:var(--accent);background:var(--accent-soft)}
.opt.sel .k{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.opt.right{border-color:var(--ok);background:var(--ok-bg)}
.opt.right .k{background:var(--ok);color:var(--surface);border-color:var(--ok)}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.opt.wrong .k{background:var(--bad);color:var(--surface);border-color:var(--bad)}
.opt:disabled{cursor:default}
.explain{margin-top:18px;padding:16px;border-radius:10px;background:var(--bg);border-left:4px solid var(--accent)}
.explain.ok{border-left-color:var(--ok)}
.explain.bad{border-left-color:var(--bad)}
.explain .verdict{font-weight:700;margin-bottom:6px}
.qfoot{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:18px}
.navgrid{display:flex;flex-wrap:wrap;gap:6px;margin-top:22px}
.navgrid button{width:36px;height:36px;border-radius:8px;border:1px solid var(--line);background:var(--surface);font-size:14px}
.navgrid button.done{background:var(--accent-soft);border-color:var(--accent)}
.navgrid button.cur{outline:2px solid var(--accent);outline-offset:1px;font-weight:700}

/* Results */
.score{font-family:var(--display);font-size:clamp(44px,11vw,68px);font-weight:800;letter-spacing:-0.03em;line-height:1}
.breakdown{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}
.breakdown li{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center}
details.rev{border:1px solid var(--line);border-radius:10px;background:var(--surface);margin-bottom:8px}
details.rev summary{padding:12px 14px;cursor:pointer;display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start}
details.rev .body{padding:0 14px 14px}
.mark{font-weight:700;width:22px;text-align:center}
.mark.ok{color:var(--ok)}.mark.bad{color:var(--bad)}
.ans{margin-top:8px}
.ans b{font-weight:700}

.status{margin-top:12px;min-height:1.5em}
.status.err{color:var(--bad)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(20px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:15px;max-width:90vw;z-index:10}
footer{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:360px){.nest{--hw:84px}.hexbtn{font-size:11px;padding:0 8px}}
@media (max-width:520px){
  body{font-size:16px}
  .hero{padding:24px 18px 22px;border-radius:18px}
  .logo-mark{width:60px;height:60px}
  .brand{gap:12px}
  .nest{--hw:96px}
.nest.four .hexbtn{padding:0 7px;font-size:12px;hyphens:manual}
  .hexbtn{font-size:12px}
  .hexbtn svg{width:30px;height:30px}
  .stem{font-size:18px}
  .subj .count{font-size:13px}
  .wrap{padding:20px 14px 56px}
}
@media (hover:none){.kbd{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---- NurseNest additions ---- */
.word{font-family:var(--display);font-size:clamp(42px,9vw,68px);font-weight:800;letter-spacing:-0.045em;line-height:.9;color:#E4ECEE}
.word span{color:#72BCC3}
.nest{--hw:96px}
.nest-row.offset{margin-left:calc((var(--hw) + var(--gap)) / 2)}
.nest.four{width:calc(4 * var(--hw) + 3 * var(--gap))}
@media (max-width:520px){.nest{--hw:78px}.hexbtn{font-size:10.5px;padding:0 6px;gap:3px}.hexbtn svg{width:24px;height:24px}}
@media (max-width:360px){.nest{--hw:68px}.hexbtn span{display:none}}
.cards3{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.mode{display:flex;flex-direction:column;gap:6px;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.mode:hover{border-color:var(--accent)}
.mode b{font-family:var(--display);font-size:19px}
.mode.feature{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.mode.feature .muted{color:color-mix(in srgb,var(--accent-ink) 80%,transparent)}
.lastsim{margin-top:12px;font-size:14.5px}
.opt .k.box{border-radius:6px}
.sata-note{font-weight:700;margin:-8px 0 14px;color:var(--warn)}
.mxwrap{overflow-x:auto;margin:4px 0}
.matrix{width:100%;border-collapse:collapse;background:var(--surface)}
.matrix th,.matrix td{border:1px solid var(--line);padding:10px;text-align:center;vertical-align:middle}
.matrix th[scope=row]{text-align:left;font-weight:400}
.matrix thead th{background:var(--bg);font-size:14.5px}
.mx{width:26px;height:26px;border-radius:50%;border:2px solid var(--line);background:var(--surface);display:inline-block;padding:0}
.mx.on{border-color:var(--accent);background:radial-gradient(circle,var(--accent) 45%,var(--surface) 50%)}
.mx:disabled{cursor:default}
td.right{background:var(--ok-bg)} td.wrongpick{background:var(--bad-bg)}
.bowtie{display:grid;gap:12px;grid-template-columns:1fr}
@media (min-width:760px){.bowtie{grid-template-columns:1fr 1fr 1fr}}
.bt-col{border:1px solid var(--line);border-radius:12px;padding:10px;margin:0;display:grid;gap:6px;align-content:start;background:var(--surface)}
.bt-col legend{font-weight:700;font-size:14px;padding:0 6px}
.bt-col .opt{font-size:15px}
.xm .bt-col{border-radius:4px;background:#fff}
.hl-text{line-height:2.2;font-size:17px}
.hl{display:inline;border:1px dashed var(--line);background:var(--surface);border-radius:6px;padding:2px 6px;font:inherit;text-align:left}
.hl.sel{background:#FFE98A;border-color:#C9A800}
.hl.right{background:var(--ok-bg);border-color:var(--ok)}
.hl.wrong{background:var(--bad-bg);border-color:var(--bad)}
.xm .hl.sel{background:#FFE98A}
.explain h3{font-family:var(--font);font-size:15px;margin:14px 0 4px}
.explain ul{margin:4px 0 0;padding-left:20px}
.explain li{margin:4px 0}
.keypt{margin-top:12px;padding:10px 12px;border-radius:8px;background:var(--surface);border:1px dashed var(--line)}
.keypt .kind{font-size:12.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.tagline{margin-top:12px;font-size:13.5px;color:var(--muted)}
.chart{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-bottom:14px}
.chart summary{font-weight:700;cursor:pointer}
.chart dt{font-weight:700;font-size:14px;color:var(--accent);margin-top:10px}
.chart dt.new{color:var(--bad)}
.chart dd{margin:2px 0 0}
.search{width:100%;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:11px 14px;margin:6px 0 12px}
.rv-group{margin-top:26px}
.rv-group>h2{display:flex;align-items:center;gap:10px;font-size:21px;margin-bottom:10px}
.rv-list{display:grid;gap:10px}
.rv{background:var(--surface);border:1px solid var(--line);border-left:5px solid var(--c);border-radius:12px;padding:14px 16px}
.rv .top{display:flex;gap:8px;align-items:baseline;flex-wrap:wrap}
.rv .concept{font-weight:700}
.rv .kind{margin-left:auto;font-size:12.5px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 7px}
.rv .phrase{font-family:var(--display);font-weight:700;font-size:18px;margin:6px 0 4px}
.rv p+p{margin-top:4px}
.meds{width:100%;border-collapse:collapse;font-size:15px;background:var(--surface)}
.meds th,.meds td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.meds th{background:var(--bg)}
.tblwrap{overflow-x:auto;border-radius:12px}
.bdrow{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center}
.bdrow .meter{max-width:none}
.perf{font-size:13px;font-weight:700;border-radius:6px;padding:2px 8px}
.perf.above{background:var(--ok-bg);color:var(--ok)} .perf.near{background:var(--accent-soft);color:var(--accent)} .perf.below{background:var(--bad-bg);color:var(--bad)}
.verdictbox{border-radius:14px;padding:20px;margin:10px 0 18px;border:1px solid var(--line);background:var(--surface)}
.verdictbox.pass{border-left:6px solid var(--ok)} .verdictbox.fail{border-left:6px solid var(--bad)}
.rules{margin:10px 0 0;padding-left:20px} .rules li{margin:6px 0}
.disclaim{font-size:13.5px;color:var(--muted);margin-top:14px}

/* ---- NCLEX simulation: plain testing-center look ---- */
body.exam{background:#E9ECEE;font-family:Arial,"Helvetica Neue",Helvetica,sans-serif}
body.exam .wrap{max-width:none;padding:0}
.xm{min-height:100vh;display:flex;flex-direction:column;color:#1b1b1b;background:#fff}
.xm-top{display:flex;align-items:center;gap:16px;justify-content:space-between;background:#20343f;color:#fff;padding:10px 18px;position:sticky;top:0;z-index:5}
.xm-top .t{font-weight:700;font-size:15px}
@media (max-width:560px){.xm-top .t .long{display:none}.xm-top{padding:8px 12px}.xm-top .r{gap:8px}}
.xm-top .r{display:flex;gap:14px;align-items:center;font-size:14px}
.xm-top button{background:#314b58;color:#fff;border:1px solid #4f6b79;border-radius:4px;padding:5px 10px;font-size:13.5px}
.xm-sub{display:flex;justify-content:space-between;background:#dfe6ea;color:#20343f;padding:6px 18px;font-size:13.5px;border-bottom:1px solid #c5d0d6}
.xm-body{flex:1;display:grid;gap:0}
.xm-body.split{grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){.xm-body.split{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.xm-pane{padding:24px 28px;max-width:860px}
.xm-chart{background:#f6f8f9;border-right:1px solid #d5dde1;padding:18px 22px}
.xm-tabs{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:10px}
.xm-tabs button{border:1px solid #b9c5cb;background:#fff;border-radius:3px 3px 0 0;padding:6px 10px;font-size:13.5px}
.xm-tabs button[aria-selected="true"]{background:#20343f;color:#fff;border-color:#20343f}
.xm-tabtext{background:#fff;border:1px solid #d5dde1;padding:14px;font-size:15px;line-height:1.5;min-height:120px}
.xm-stem{font-size:17px;line-height:1.5;margin:0 0 16px}
.xm-note{font-weight:700;margin:-6px 0 14px}
.xm-opts{display:grid;gap:4px}
.xm-opt{display:flex;gap:12px;align-items:flex-start;text-align:left;background:#fff;border:1px solid transparent;padding:9px 10px;border-radius:3px;font-size:16px;line-height:1.45}
.xm-opt:hover{background:#f1f5f7}
.xm-opt.sel{background:#e3eef3;border-color:#9fb8c4}
.xm-mark{width:18px;height:18px;border:2px solid #555;flex:none;margin-top:2px;display:grid;place-items:center}
.xm-mark.radio{border-radius:50%}
.xm-opt.sel .xm-mark.radio{background:radial-gradient(circle,#20343f 45%,#fff 50%)}
.xm-opt.sel .xm-mark.box::after{content:"✓";font-size:13px;font-weight:700;color:#20343f}
.xm .matrix{font-size:15px}
.xm .mx{border-color:#555}
.xm .mx.on{background:radial-gradient(circle,#20343f 45%,#fff 50%);border-color:#20343f}
.xm-foot{position:sticky;bottom:0;display:flex;justify-content:flex-end;gap:10px;align-items:center;background:#20343f;padding:10px 18px}
.xm-foot .hint{color:#c9d6dc;margin:0 auto 0 0;font-size:13.5px}
.xm-next{background:#f2f2f2;color:#1b1b1b;border:1px solid #999;border-radius:4px;padding:8px 22px;font-weight:700}
.xm-next:disabled{opacity:.5}
.calc{position:fixed;right:18px;top:64px;z-index:20;background:#f4f4f4;border:1px solid #888;border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,.25);width:220px;padding:10px;font-family:Arial,sans-serif}
.calc .disp{background:#fff;border:1px solid #aaa;padding:8px;text-align:right;font-size:20px;margin-bottom:8px;min-height:40px;overflow:hidden}
.calc .keys{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
.calc .keys button{padding:9px 0;border:1px solid #aaa;background:#fff;border-radius:3px;font-size:15px}
.calc .bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;font-size:13px;font-weight:700}
.calc .bar button{border:0;background:none;font-size:16px}


/* ---- Reviewers' Nest theme: cream page, mint cards, deep teal ---- */
:root{
  --bg:#D3EEE2; --card:#E6F5EE; --surface:#FFFFFF; --ink:#1F2A28; --muted:#5E6B66; --line:#B7D8CA;
  --accent:#0F4C4A; --accent-ink:#FFFFFF; --accent-soft:#E4F4EC;
  --brand:#0F4C4A; --logo-line:#0F4C4A; --hero-ink:#1F2A28; --hero-muted:#5E6F6A;
  --pattern:none; color-scheme:light;
  --font:"DM Sans","Atkinson Hyperlegible","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#D3EEE2; --card:#E6F5EE; --surface:#FFFFFF; --ink:#1F2A28; --muted:#5E6B66; --line:#B7D8CA;
    --accent:#0F4C4A; --accent-ink:#FFFFFF; --accent-soft:#E4F4EC;
    --ok:#1E7446; --ok-bg:#E2F1E7; --bad:#A93A2A; --bad-bg:#F7E3DF; --warn:#8A5A00;
    --brand:#0F4C4A; --logo-line:#0F4C4A; --hero-ink:#1F2A28; --hero-muted:#5E6F6A; --pattern:none;
  }
}
:root[data-theme="dark"]{
    --bg:#D3EEE2; --card:#E6F5EE; --surface:#FFFFFF; --ink:#1F2A28; --muted:#5E6B66; --line:#B7D8CA;
    --accent:#0F4C4A; --accent-ink:#FFFFFF; --accent-soft:#E4F4EC;
    --ok:#1E7446; --ok-bg:#E2F1E7; --bad:#A93A2A; --bad-bg:#F7E3DF; --warn:#8A5A00;
    --brand:#0F4C4A; --logo-line:#0F4C4A; --hero-ink:#1F2A28; --hero-muted:#5E6F6A; --pattern:none;
}
body:not(.exam){background:var(--bg)}
.hero{--ink:var(--hero-ink);--muted:var(--hero-muted);background:var(--card);color:var(--ink);border-radius:26px}
.hero .word,.hero .word span{color:var(--brand)}
.hero .lede{color:var(--ink)}
.hero .hexwrap{filter:drop-shadow(0 3px 0 rgba(15,76,74,.18))}
.logo-mark path{stroke:var(--logo-line)}
.panel,.subjects,.mode,.qcard,.chart,.rv{background:var(--card);border-color:transparent;border-radius:22px}
.qcard{border-top:6px solid var(--c)}
.rv{border-left:5px solid var(--c)}
.subjects li+li{border-top-color:color-mix(in srgb,var(--accent) 14%,transparent)}
.subj:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}
.mode:hover{border-color:var(--accent)}
.mode.feature{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.opt,.bt-col,.hl,.search,.matrix,.meds,.keypt{background:var(--surface)}
.explain{background:color-mix(in srgb,var(--surface) 60%,var(--card))}
.btn{border-radius:12px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.chip{background:var(--surface)}
.meter{background:color-mix(in srgb,var(--accent) 14%,transparent)}


/* ==== MLSNest-style layer: cream page, soft mint hero, ringed honeycomb, subject cards ==== */
:root{
  --bg:#FFFCF6; --card:#FFFFFF; --surface:#FFFFFF; --ink:#1F2A28; --muted:#5E6B66; --line:#DCE8E2;
  --accent:#0F4C4A; --accent-ink:#FFFFFF; --accent-soft:#E0F2EA;
  --hero-bg:#D8F0E5; --hero-accent:#17727A; --hero-tag:#1E6B66; --nurse-red:#E4533F;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#FFFCF6;--card:#FFFFFF;--line:#DCE8E2;--accent-soft:#E0F2EA}}
:root[data-theme="dark"]{--bg:#FFFCF6;--card:#FFFFFF;--line:#DCE8E2;--accent-soft:#E0F2EA}
body:not(.exam){background:var(--bg)}

/* hero */
.hero{position:relative;overflow:hidden;isolation:isolate;background:var(--hero-bg);border-radius:28px;padding:34px 34px 30px}
.hero::before,.hero::after{content:"";position:absolute;z-index:-1;pointer-events:none;
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--hero-accent)}
.hero::before{width:340px;height:392px;right:-120px;top:-150px;opacity:.08;transform:rotate(8deg)}
.hero::after{width:220px;height:254px;left:-90px;bottom:-120px;opacity:.07;transform:rotate(-12deg)}
.hero .pulse{position:absolute;left:0;right:0;bottom:0;width:100%;height:34px;z-index:-1;pointer-events:none;
  fill:none;stroke:var(--nurse-red);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;opacity:.22;
  stroke-dasharray:1400;stroke-dashoffset:1400;animation:trace 2.4s ease-out .3s forwards}
@keyframes trace{to{stroke-dashoffset:0}}
.hero .word{font-size:clamp(40px,8.5vw,56px);line-height:1;letter-spacing:-0.035em;color:var(--brand)}
.hero .word span{color:var(--hero-accent)}
.tag{margin-top:4px;font-size:16px;font-weight:500;color:var(--hero-tag)}
.logo-mark{width:80px;height:80px}
.hero .lede{font-size:18px;color:var(--ink)}
.lede em{font-family:"Fraunces",Georgia,serif;font-style:italic;font-weight:600;color:var(--hero-accent);
  background:linear-gradient(transparent 58%, color-mix(in srgb,var(--nurse-red) 18%, transparent) 58%, color-mix(in srgb,var(--nurse-red) 18%, transparent) 96%, transparent 96%);padding:0 3px;border-radius:3px}
.points{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px;font-size:16px}
.points li{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start}
.points svg{width:20px;height:20px;margin-top:2px;fill:none;stroke:var(--nurse-red);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.points b{font-weight:700}
.stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.stats span{background:color-mix(in srgb,#fff 72%,transparent);border:1px solid color-mix(in srgb,var(--accent) 18%,transparent);border-radius:999px;padding:5px 12px;font-size:14px;color:var(--hero-muted);font-variant-numeric:tabular-nums}
.stats b{color:var(--ink);font-weight:700}

/* honeycomb: flat colour with a white inner ring, like MLSNest */
.nest{--gap:8px}
.hero .hexwrap{filter:drop-shadow(0 4px 6px rgba(15,76,74,.18))}
.hexbtn{position:relative;isolation:isolate;background:var(--c)!important;text-shadow:0 1px 2px rgba(0,0,0,.35);
  font:700 11px/1.12 var(--font);gap:3px;padding:0 0 8px}
.hexbtn::before,.hexbtn::after{content:"";position:absolute;inset:0;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);pointer-events:none;z-index:-1}
.hexbtn::before{background:rgba(255,255,255,.28);transform:scale(.86)}
.hexbtn::after{background:var(--c);transform:scale(.82)}
.hexbtn > *{position:relative}
.hexbtn span{display:block;max-width:78%;letter-spacing:-0.015em}
.hexbtn svg{width:26px;height:26px;filter:drop-shadow(0 1px 1px rgba(0,0,0,.2))}
.hexbtn:hover{transform:translateY(-3px) scale(1.04)}
@keyframes pop{from{transform:scale(.86)}to{transform:scale(1)}}
.hero .hexbtn{animation:pop .45s cubic-bezier(.3,1.5,.5,1) both}
.nest-row:nth-child(2) .hexbtn{animation-delay:.06s}.nest-row:nth-child(3) .hexbtn{animation-delay:.12s}

/* buttons */
.btn{border-radius:12px;transition:transform .15s ease, box-shadow .15s ease, filter .15s ease;background:var(--surface);border-color:var(--line)}
.btn.primary{padding:12px 20px;box-shadow:0 2px 0 color-mix(in srgb,var(--accent) 55%,#000)}
.btn.primary:active{transform:translateY(1px);box-shadow:0 1px 0 color-mix(in srgb,var(--accent) 55%,#000)}
.btn.go::after{content:"\2192";display:inline-block;margin-left:10px;transition:transform .15s ease}
.btn.go:hover::after{transform:translateX(3px)}
.btn.ghost{background:transparent;border-color:transparent}

/* NCLEX simulation card: dark teal with a monitor trace */
.simcard{position:relative;overflow:hidden;isolation:isolate;width:100%;margin-top:18px;display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;
  text-align:left;border:0;border-radius:22px;padding:20px 22px;color:#EAF6F1;
  background:linear-gradient(135deg,#0F4C4A 0%,#123F3E 60%,#0B3433 100%);box-shadow:0 10px 24px -14px rgba(15,76,74,.7);transition:transform .18s ease, box-shadow .18s ease}
.simcard::before{content:"";position:absolute;inset:0;z-index:-1;opacity:.12;
  background:repeating-linear-gradient(0deg,#72BCC3 0 1px,transparent 1px 18px),repeating-linear-gradient(90deg,#72BCC3 0 1px,transparent 1px 18px)}
.simcard:hover{transform:translateY(-2px);box-shadow:0 16px 30px -16px rgba(15,76,74,.8)}
.sim-badge{width:54px;height:62px;display:grid;place-items:center;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--nurse-red)}
.sim-badge svg{width:30px;height:30px;fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.sim-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.sim-kicker{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#8FD3C8}
.sim-text > b{font-family:var(--display);font-size:22px;letter-spacing:-0.02em;color:#fff}
.sim-sub{font-size:15px;color:#C9E4DC}
.sim-last{margin-top:4px;font-size:13.5px;color:#A9D4CA}
.sim-last b{color:#fff}
.sim-go{justify-self:end;white-space:nowrap;font-weight:700;background:#fff;color:#0F4C4A;border-radius:999px;padding:10px 18px;box-shadow:0 2px 0 rgba(0,0,0,.25)}
@media (max-width:560px){.simcard{grid-template-columns:auto 1fr}.sim-go{grid-column:1 / -1;justify-self:stretch;text-align:center}}

/* topics as cards */
.section>h2{display:flex;align-items:center;gap:10px;font-size:24px;margin-bottom:4px}
.section>h2::before{content:"";width:14px;height:16px;flex:none;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--nurse-red)}
.subjects{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;background:none;border:0;border-radius:0;box-shadow:none;overflow:visible}
.subjects li+li{border-top:0}
.subjects li{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:18px;transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
.subjects li:hover{transform:translateY(-2px);box-shadow:0 8px 20px -10px rgba(15,76,74,.28);border-color:color-mix(in srgb,var(--c) 45%,var(--line))}
.subj{grid-template-columns:auto 1fr;grid-template-rows:auto auto;row-gap:10px;padding:18px 18px 16px;position:relative;z-index:1}
.subj:hover{background:color-mix(in srgb,var(--c) 6%,var(--surface))}
.subj:hover .name{color:var(--accent)}
.subj .count{grid-column:1 / -1;text-align:left;display:flex;gap:14px;font-size:13.5px}
.subj .meter{max-width:none;background:color-mix(in srgb,var(--c) 14%,var(--line))}
.subj .wmk{position:absolute;right:-18px;bottom:-26px;width:110px;height:110px;color:var(--c);opacity:.09;z-index:-1;pointer-events:none}
.subj .wmk svg{width:100%;height:100%}

.combs{display:flex;gap:4px;justify-content:center;margin:44px 0 0}
.combs i{width:12px;height:14px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--c);display:block}
.combs i:nth-child(even){transform:translateY(6px)}
footer{align-items:center}

/* other screens pick up the lighter cards */
.panel,.chart,.rv,.qcard{background:var(--surface);border:1px solid var(--line)}
.qcard{border-top:5px solid var(--c);border-radius:18px}
.rv{border-left:5px solid var(--c)}
.mode{background:var(--surface);border:1px solid var(--line)}

@media (max-width:520px){
  .hero{padding:24px 18px 22px;border-radius:20px}
  .logo-mark{width:60px;height:60px}
  .nest{--hw:74px;--gap:6px}
  .nest.four .hexbtn{font-size:9px;padding:0 0 5px;gap:2px}
  .nest.four .hexbtn span{max-width:80%;letter-spacing:-0.02em}
  .nest.four .hexbtn svg{width:20px;height:20px}
  .actions.home{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .actions.home .go{grid-column:1 / -1}
  .actions.home .btn{padding:10px 8px;font-size:15px}
}
@media (max-width:360px){.nest{--hw:64px}.nest.four .hexbtn span{display:none}.nest.four .hexbtn svg{width:24px;height:24px}}
@media (prefers-reduced-motion:reduce){.hero .pulse{animation:none;stroke-dashoffset:0}}