/* DNB Pediatrics — Viva Voce Trainer : bright theme */

:root{
  --bg:#f4f7fb;
  --bg-alt:#ffffff;
  --ink:#152238;
  --ink-soft:#5b6b83;
  --ink-faint:#8595ab;
  --line:#dde5ef;
  --line-soft:#eef3f8;

  --brand:#2563eb;
  --brand-dark:#1d4ed8;
  --brand-tint:#e8f0ff;

  /* station accents */
  --nrp:#0891b2;      --nrp-tint:#e0f7fb;
  --amb:#ea8c00;      --amb-tint:#fff2dc;
  --vac:#16a34a;      --vac-tint:#e3f8ea;
  --emg:#e11d48;      --emg-tint:#ffe6ec;

  --good:#16a34a;
  --warn:#ea8c00;
  --bad:#e11d48;

  --radius:14px;
  --shadow:0 1px 2px rgba(21,34,56,.05), 0 4px 16px rgba(21,34,56,.06);
  --shadow-lg:0 2px 6px rgba(21,34,56,.06), 0 12px 32px rgba(21,34,56,.10);
  --max:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);
  line-height:1.62;-webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none;}
a:hover{text-decoration:underline;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px;}

/* ---------- header ---------- */
header.site{
  background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:60;
}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:18px;}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;color:var(--ink);font-size:1.02rem;letter-spacing:-.01em;}
.brand:hover{text-decoration:none;}
.brand .mark{
  width:34px;height:34px;border-radius:10px;color:#fff;font-size:.72rem;font-weight:800;
  background:linear-gradient(135deg,#2563eb,#0891b2);display:grid;place-items:center;letter-spacing:.02em;
}
.brand small{display:block;font-weight:500;font-size:.72rem;color:var(--ink-faint);letter-spacing:0;}
nav.site-nav{display:flex;gap:6px;flex-wrap:wrap;}
nav.site-nav a{
  color:var(--ink-soft);font-size:.9rem;font-weight:600;padding:7px 12px;border-radius:8px;
}
nav.site-nav a:hover{background:var(--line-soft);text-decoration:none;color:var(--ink);}
nav.site-nav a.active{background:var(--brand-tint);color:var(--brand-dark);}

/* ---------- hero ---------- */
.hero{padding:56px 0 36px;}
.hero h1{font-size:2.6rem;line-height:1.14;margin:0 0 14px;letter-spacing:-.025em;}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,#2563eb,#0891b2);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.lead{font-size:1.12rem;color:var(--ink-soft);max-width:620px;margin:0 0 26px;}
.hero-stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:30px;padding-top:24px;border-top:1px solid var(--line);}
.hero-stats div b{display:block;font-size:1.6rem;line-height:1.1;color:var(--ink);}
.hero-stats div span{font-size:.82rem;color:var(--ink-faint);}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;padding:11px 22px;border-radius:10px;border:none;cursor:pointer;
  background:var(--brand);color:#fff;font-weight:650;font-size:.95rem;font-family:inherit;
  transition:background .15s,transform .06s,box-shadow .15s;box-shadow:0 1px 2px rgba(37,99,235,.25);
}
.btn:hover{background:var(--brand-dark);color:#fff;text-decoration:none;}
.btn:active{transform:translateY(1px);}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow);}
.btn.ghost:hover{background:var(--line-soft);color:var(--ink);}
.btn.sm{padding:7px 14px;font-size:.85rem;border-radius:8px;}
.btn:disabled{opacity:.45;cursor:not-allowed;}

/* ---------- layout ---------- */
section{padding:38px 0;}
section > h2{font-size:1.6rem;margin:0 0 6px;letter-spacing:-.02em;}
section > p.sub{color:var(--ink-soft);margin:0 0 24px;font-size:.96rem;max-width:640px;}

.grid{display:grid;gap:18px;}
.grid.c2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));}
.grid.c3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));}
.grid.c4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);}
.card h3{margin:0 0 8px;font-size:1.06rem;letter-spacing:-.01em;}
.card p{margin:0;color:var(--ink-soft);font-size:.92rem;}

/* station cards */
.st-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;
  overflow:hidden;box-shadow:var(--shadow);transition:box-shadow .18s,transform .18s;
  display:flex;flex-direction:column;
}
.st-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);}
.st-card .bar{height:5px;}
.st-card .body{padding:22px;flex:1;display:flex;flex-direction:column;}
.st-card .no{
  display:inline-flex;align-items:center;gap:8px;font-size:.72rem;font-weight:750;
  text-transform:uppercase;letter-spacing:.07em;margin-bottom:9px;
}
.st-card h3{margin:0 0 8px;font-size:1.22rem;letter-spacing:-.015em;}
.st-card p{color:var(--ink-soft);font-size:.9rem;margin:0 0 16px;flex:1;}
.st-card .foot{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  padding-top:14px;border-top:1px solid var(--line-soft);font-size:.8rem;color:var(--ink-faint);}

.st-nrp .bar{background:var(--nrp);} .st-nrp .no{color:var(--nrp);}
.st-amb .bar{background:var(--amb);} .st-amb .no{color:var(--amb);}
.st-vac .bar{background:var(--vac);} .st-vac .no{color:var(--vac);}
.st-emg .bar{background:var(--emg);} .st-emg .no{color:var(--emg);}

/* ---------- pills & tags ---------- */
.pill{
  display:inline-block;font-size:.7rem;font-weight:650;padding:3px 9px;border-radius:99px;
  background:var(--line-soft);color:var(--ink-soft);border:1px solid var(--line);
}
.pill.high{background:#fff1f4;color:#be123c;border-color:#fecdd6;}
.pill.med{background:#fff6e6;color:#b45309;border-color:#fde3b4;}
.pill.nrp{background:var(--nrp-tint);color:#0e7490;border-color:#b6ecf5;}
.pill.amb{background:var(--amb-tint);color:#b45309;border-color:#fde3b4;}
.pill.vac{background:var(--vac-tint);color:#15803d;border-color:#bbf0cd;}
.pill.emg{background:var(--emg-tint);color:#be123c;border-color:#fecdd6;}

/* ---------- notice ---------- */
.notice{
  background:var(--brand-tint);border:1px solid #c7dbff;border-left:4px solid var(--brand);
  border-radius:10px;padding:14px 18px;font-size:.89rem;color:#1e3a6e;margin-bottom:22px;
}
.notice strong{color:#152238;}
.notice.amber{background:#fff8ec;border-color:#fbe0b0;border-left-color:var(--warn);color:#7c4a03;}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);}
table.data{width:100%;border-collapse:collapse;font-size:.89rem;min-width:520px;}
table.data th,table.data td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top;}
table.data th{background:#f8fafd;font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-faint);font-weight:700;position:sticky;top:0;}
table.data tr:last-child td{border-bottom:none;}
table.data td:first-child{font-weight:650;white-space:nowrap;}
table.data tbody tr:hover{background:#fafcff;}

/* ---------- mode switch / chips ---------- */
.switch{display:inline-flex;background:#fff;border:1px solid var(--line);border-radius:99px;padding:4px;gap:3px;box-shadow:var(--shadow);}
.switch button{
  border:none;background:transparent;color:var(--ink-soft);padding:8px 18px;border-radius:99px;
  cursor:pointer;font-family:inherit;font-size:.88rem;font-weight:650;
}
.switch button.active{background:var(--brand);color:#fff;}

.chips{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0;}
.chip{
  padding:8px 14px;border-radius:9px;border:1px solid var(--line);background:#fff;
  color:var(--ink-soft);cursor:pointer;font-size:.86rem;font-family:inherit;font-weight:600;
  box-shadow:var(--shadow);transition:.15s;
}
.chip:hover{border-color:var(--brand);color:var(--brand);}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.chip.nrp.active{background:var(--nrp);border-color:var(--nrp);}
.chip.amb.active{background:var(--amb);border-color:var(--amb);}
.chip.vac.active{background:var(--vac);border-color:var(--vac);}
.chip.emg.active{background:var(--emg);border-color:var(--emg);}

/* ---------- timer ---------- */
.timer-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 22px;
  margin-bottom:20px;position:sticky;top:74px;z-index:30;box-shadow:var(--shadow-lg);
}
.timer{font-size:2.3rem;font-weight:800;font-variant-numeric:tabular-nums;line-height:1;letter-spacing:-.03em;}
.timer.warn{color:var(--warn);}
.timer.danger{color:var(--bad);animation:blink 1s infinite;}
@keyframes blink{50%{opacity:.4;}}
.meta{font-size:.8rem;color:var(--ink-faint);margin-top:4px;}
.progress{height:5px;background:var(--line);border-radius:99px;overflow:hidden;margin-top:10px;}
.progress i{display:block;height:100%;background:var(--brand);transition:width .5s linear;}

/* ---------- question cards ---------- */
.q{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin-bottom:13px;box-shadow:var(--shadow);}
.q .qhead{display:flex;gap:13px;align-items:flex-start;}
.q .qnum{
  flex:0 0 auto;width:27px;height:27px;border-radius:8px;background:var(--brand-tint);color:var(--brand-dark);
  display:grid;place-items:center;font-size:.76rem;font-weight:800;
}
.q .qtext{font-weight:650;flex:1;font-size:1rem;}
.q .ans{margin-top:15px;padding-top:15px;border-top:1px solid var(--line-soft);color:var(--ink-soft);font-size:.93rem;display:none;}
.q.open .ans{display:block;}
.q .ans ul,.q .ans ol{margin:8px 0 0;padding-left:22px;}
.q .ans li{margin-bottom:6px;}
.q .ans strong{color:var(--ink);font-weight:700;}
.q .qactions{display:flex;gap:8px;margin-top:13px;flex-wrap:wrap;align-items:center;}

/* ---------- instrument cards ---------- */
.inst{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;overflow:hidden;box-shadow:var(--shadow);}
.inst > header{
  padding:16px 22px;background:linear-gradient(180deg,#fff,#fafcff);border-bottom:1px solid var(--line-soft);
  display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;cursor:pointer;
}
.inst > header:hover{background:#f7fafe;}
.inst h3{margin:0;font-size:1.1rem;letter-spacing:-.015em;}
.inst .aka{font-size:.8rem;color:var(--ink-faint);margin-top:2px;}
.inst .body{padding:0 22px 20px;display:none;}
.inst.open .body{display:block;}
.inst .sec{margin-top:18px;}
.inst .sec h4{
  margin:0 0 8px;font-size:.74rem;text-transform:uppercase;letter-spacing:.07em;
  color:var(--ink-faint);font-weight:750;display:flex;align-items:center;gap:7px;
}
.inst .sec h4::before{content:"";width:3px;height:13px;border-radius:2px;background:var(--emg);}
.inst .sec.ind h4::before{background:var(--good);}
.inst .sec.con h4::before{background:var(--bad);}
.inst .sec.part h4::before{background:var(--brand);}
.inst .sec.fu h4::before{background:var(--warn);}
.inst .sec ul{margin:0;padding-left:20px;font-size:.91rem;color:var(--ink-soft);}
.inst .sec ul li{margin-bottom:6px;}
.inst .sec strong{color:var(--ink);font-weight:700;}
.inst .sec p{font-size:.91rem;color:var(--ink-soft);margin:0;}
.inst .fu-item{border-left:2px solid var(--line);padding:2px 0 2px 14px;margin-bottom:12px;}
.inst .fu-item b{display:block;color:var(--ink);font-size:.91rem;margin-bottom:3px;}
.inst .fu-item span{font-size:.89rem;color:var(--ink-soft);}
.inst .spec{
  display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.9rem;
  background:#f8fafd;border:1px solid var(--line-soft);border-radius:10px;padding:14px 16px;
}
.inst .spec dt{font-weight:700;color:var(--ink);white-space:nowrap;}
.inst .spec dd{margin:0;color:var(--ink-soft);}

/* ---------- search ---------- */
.search{
  width:100%;padding:12px 16px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink);font-family:inherit;font-size:.96rem;margin-bottom:16px;box-shadow:var(--shadow);
}
.search:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}

/* ---------- score / result ---------- */
.score-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:10px;}
.score-row input[type=range]{flex:1;min-width:180px;accent-color:var(--brand);}
.score-val{font-weight:800;font-variant-numeric:tabular-nums;min-width:64px;text-align:right;font-size:1.05rem;}

.result{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center;box-shadow:var(--shadow-lg);}
.result .big{font-size:3.4rem;font-weight:800;line-height:1;letter-spacing:-.03em;background:linear-gradient(135deg,#2563eb,#0891b2);-webkit-background-clip:text;background-clip:text;color:transparent;}
.result table{width:100%;margin-top:22px;border-collapse:collapse;font-size:.92rem;}
.result table td{padding:10px 6px;border-bottom:1px solid var(--line-soft);text-align:left;}
.result table td:last-child{text-align:right;font-variant-numeric:tabular-nums;font-weight:700;}
.result table tr:last-child td{border-bottom:none;}

/* ---------- misc ---------- */
.hidden{display:none !important;}
footer.site{border-top:1px solid var(--line);background:#fff;padding:26px 0;margin-top:48px;color:var(--ink-faint);font-size:.85rem;}
footer.site .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:18px;}

@media(max-width:680px){
  .hero h1{font-size:2rem;}
  header.site .wrap{height:auto;padding-top:10px;padding-bottom:10px;flex-wrap:wrap;}
  .timer-bar{position:static;}
  .timer{font-size:1.9rem;}
  .inst .spec{grid-template-columns:1fr;gap:2px 0;}
  .inst .spec dd{margin-bottom:8px;}
}
@media print{
  header.site,footer.site,.btn,.switch,.chips,.timer-bar,.search{display:none !important;}
  .q .ans,.inst .body{display:block !important;}
  body{background:#fff;}
}