:root{color-scheme:light;
  --bg:#eef1f5;--card:#fff;--ink:#16202c;--muted:#5e6b7a;--line:#d9dfe7;--soft:#f5f7fa;
  --brand:#0f2a47;--brand2:#1d4f86;--accent:#2563eb;--accent-soft:#e7efff;
  --ok:#15803d;--ok-soft:#e3f5ea;--bad:#c2410c;--bad-soft:#fdeee5;--warn:#b45309;--warn-soft:#fef3dc;--flag:#d97706;
  --shadow:0 1px 2px rgba(16,32,52,.06),0 4px 16px rgba(16,32,52,.06);
}

*{box-sizing:border-box}
html,body{margin:0}
html{font-size:var(--fs,16px)}
body{background:var(--bg);color:var(--ink);font:1rem/1.55 "Segoe UI",system-ui,-apple-system,Roboto,sans-serif}
button{font:inherit;color:inherit;cursor:pointer}
.hidden{display:none!important}
.wrap{max-width:980px;margin:0 auto;padding:24px 16px 80px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
.btn{border:1px solid var(--line);background:var(--card);border-radius:9px;padding:9px 16px;font-weight:600;font-size:.92rem}
.btn:hover:not(:disabled){border-color:var(--accent)}
.btn:disabled{opacity:.4;cursor:default}
.btn.pri{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.pri:hover:not(:disabled){filter:brightness(1.08)}
.btn.ghost{background:transparent}
.btn.danger{border-color:var(--bad);color:var(--bad)}
.muted{color:var(--muted)}
h1,h2,h3{margin:0;line-height:1.25}

/* ---------- HOME ---------- */
.hero{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:16px;padding:28px 28px 24px;margin-bottom:18px;position:relative;overflow:hidden}
.hero h1{font-size:1.7rem;letter-spacing:-.01em}
.hero p{margin:6px 0 0;opacity:.85}
.hero .kpis{display:flex;flex-wrap:wrap;gap:26px;margin-top:18px}
.hero .kpis b{display:block;font-size:1.5rem}
.hero .kpis span{font-size:.8rem;opacity:.8;text-transform:uppercase;letter-spacing:.05em}
.setup{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.setup .card{padding:18px}
.setup h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:10px}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mode{border:2px solid var(--line);border-radius:12px;padding:14px;text-align:left;background:var(--card)}
.mode.on{border-color:var(--accent);background:var(--accent-soft)}
.mode b{display:block;font-size:1rem}
.mode small{color:var(--muted);font-size:.83rem;line-height:1.4;display:block;margin-top:4px}
.pills{display:flex;flex-wrap:wrap;gap:6px}
.pill{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:6px 13px;font-size:.86rem}
.pill.on{background:var(--accent);border-color:var(--accent);color:#fff}
.row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:12px 0 6px}
.topics{grid-column:1/-1}
.topics .pills{max-height:none}
.mrow{display:grid;grid-template-columns:minmax(130px,200px) 1fr;gap:10px;align-items:center}
.mrow select{width:100%;padding:9px;border-radius:9px;border:2px solid var(--line);background:var(--card);font:inherit;color:var(--ink)}
.mrow select.sel{border-color:var(--accent);background:var(--accent-soft)}.mrow select.correct{border-color:var(--ok);background:var(--ok-soft)}.mrow select.wrong{border-color:var(--bad);background:var(--bad-soft)}
.mrow .fix{font-size:.85rem;color:var(--ok);margin-top:3px}
.pill .n{opacity:.65;font-size:.78rem;margin-left:4px}
.startbar{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px}
.startbar .sum{font-size:.95rem}
.startbar .sum b{color:var(--accent)}
.resume{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:14px 18px;margin-bottom:16px;border-left:4px solid var(--flag)}
table.hist{width:100%;border-collapse:collapse;font-size:.88rem}
.hist th,.hist td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line)}
.hist th{color:var(--muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}
.histwrap{grid-column:1/-1;padding:18px;overflow-x:auto}

/* ---------- EXAM ---------- */
.topbar{position:sticky;top:0;z-index:20;background:var(--brand);color:#fff}
.topbar .in{max-width:980px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.topbar .title{font-weight:700;font-size:.95rem;flex:1;min-width:150px}
.topbar .title small{display:block;font-weight:400;opacity:.75;font-size:.78rem}
.clockbox{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.1);border-radius:10px;padding:6px 12px}
.clock{font:700 1.35rem/1 ui-monospace,"Cascadia Mono",Consolas,monospace;letter-spacing:.03em}
.clocklbl{font-size:.68rem;opacity:.75;text-transform:uppercase;letter-spacing:.06em;line-height:1.2}
.clockbox.warn{background:#b45309}.clockbox.crit{background:#b91c1c;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.75}}
.topbar .tb{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#fff;border-radius:8px;padding:7px 12px;font-size:.85rem;font-weight:600}
.topbar .tb:hover{background:rgba(255,255,255,.22)}
.progress{height:4px;background:rgba(255,255,255,.15)}
.progress i{display:block;height:100%;background:#60a5fa;width:0;transition:width .3s}
.qcard{padding:26px 28px;margin-top:18px}
.qhead{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.qnum{font-weight:800;font-size:1.05rem}
.tag{font-size:.75rem;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--soft);border:1px solid var(--line);color:var(--muted)}
.tag.H{color:var(--bad);border-color:var(--bad);background:var(--bad-soft)}
.tag.M{color:var(--warn);border-color:var(--warn);background:var(--warn-soft)}
.qhead .sp{flex:1}
.flagbtn{border:1px solid var(--line);background:var(--card);border-radius:8px;padding:5px 11px;font-size:.84rem;font-weight:600}
.flagbtn.on{background:var(--warn-soft);border-color:var(--flag);color:var(--flag)}
.stem{font-size:1.1rem;margin:4px 0 20px}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;border:2px solid var(--line);background:var(--card);border-radius:11px;padding:13px 14px;line-height:1.45;transition:border-color .12s,background .12s}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt .l{flex:0 0 28px;height:28px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.85rem;border:2px solid var(--line);background:var(--soft)}
.opt.sel{border-color:var(--accent);background:var(--accent-soft)}
.opt.sel .l{background:var(--accent);border-color:var(--accent);color:#fff}
.opt:disabled{cursor:default}
.opt.correct{border-color:var(--ok);background:var(--ok-soft)}
.opt.correct .l{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt.wrong .l{background:var(--bad);border-color:var(--bad);color:#fff}
.explain{margin-top:18px;border-radius:11px;padding:14px 16px;background:var(--soft);border:1px solid var(--line)}
.explain .verdict{font-weight:800;margin-bottom:6px}
.explain .verdict.ok{color:var(--ok)}.explain .verdict.bad{color:var(--bad)}
.explain p{margin:0}
.mind{margin-top:8px;font-size:.85rem;color:var(--muted)}
.qfoot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:22px;flex-wrap:wrap}
.qtimer{font-size:.85rem;color:var(--muted);font-variant-numeric:tabular-nums}
.qtimer.slow{color:var(--bad)}
.navbtns{display:flex;gap:8px}
.hint{text-align:center;font-size:.78rem;color:var(--muted);margin-top:14px}
kbd{font:600 .75rem ui-monospace,monospace;border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;background:var(--card)}

/* navigator drawer */
.drawer{position:fixed;inset:0;z-index:40;display:flex;justify-content:flex-end;background:rgba(5,12,20,.45)}
.drawer .panel{width:min(380px,100%);height:100%;background:var(--card);padding:18px;overflow:auto}
.ngrid{display:grid;grid-template-columns:repeat(6,1fr);gap:7px;margin:14px 0}
.ngrid button{position:relative;border:1px solid var(--line);background:var(--card);border-radius:8px;padding:8px 0;font-size:.85rem;font-weight:600}
.ngrid button.ans{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.ngrid button.cur{outline:2px solid var(--ink);outline-offset:1px}
.ngrid button.fl::after{content:"";position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:var(--flag)}
.ngrid button.ok{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.ngrid button.ko{background:var(--bad-soft);border-color:var(--bad);color:var(--bad)}
.ngrid button:disabled{opacity:.35;cursor:not-allowed}
.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:.78rem;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:-1px;border:1px solid var(--line)}

/* modal */
.modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;background:rgba(5,12,20,.5);padding:16px}
.modal .box{max-width:440px;width:100%;padding:22px}
.modal h3{margin-bottom:8px}
.modal .acts{display:flex;justify-content:flex-end;gap:8px;margin-top:18px}
.pausecover{position:fixed;inset:0;z-index:45;background:var(--bg);display:grid;place-items:center;text-align:center}

/* ---------- RESULTS ---------- */
.res-head{display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:center;padding:24px}
.ring{--p:0;width:150px;height:150px;border-radius:50%;background:conic-gradient(var(--c,var(--accent)) calc(var(--p)*1%),var(--line) 0);display:grid;place-items:center}
.ring>div{width:118px;height:118px;border-radius:50%;background:var(--card);display:grid;place-items:center;text-align:center}
.ring b{font-size:2rem;line-height:1}
.ring small{color:var(--muted);font-size:.78rem}
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-weight:800;font-size:.85rem;letter-spacing:.04em}
.badge.pass{background:var(--ok-soft);color:var(--ok)}.badge.fail{background:var(--bad-soft);color:var(--bad)}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:14px}
.tile{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.tile span{display:block;font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.tile b{font-size:1.08rem;font-variant-numeric:tabular-nums}
.tile b.ok{color:var(--ok)}.tile b.bad{color:var(--bad)}
.sec{padding:20px 22px;margin-top:16px}
.sec h3{margin-bottom:12px;font-size:1.02rem}
.bars{display:flex;flex-direction:column;gap:9px}
.bar{display:grid;grid-template-columns:minmax(150px,260px) 1fr 70px;gap:10px;align-items:center;font-size:.88rem}
.bar .track{height:10px;background:var(--line);border-radius:6px;overflow:hidden}
.bar .track i{display:block;height:100%;border-radius:6px}
.bar .v{text-align:right;font-variant-numeric:tabular-nums;color:var(--muted)}
.resacts{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.rv{padding:18px 20px;margin-top:12px;border-left:4px solid var(--line)}
.rv.ok{border-left-color:var(--ok)}.rv.ko{border-left-color:var(--bad)}.rv.un{border-left-color:var(--muted)}
.rv .stem{font-size:1rem;margin:8px 0 12px}
.rv .opt{padding:9px 12px;font-size:.93rem}
.filters{display:flex;gap:6px;flex-wrap:wrap}
@media (max-width:720px){
  .setup{grid-template-columns:1fr}.modes{grid-template-columns:1fr}
  .res-head{grid-template-columns:1fr;justify-items:center;text-align:center}
  .qcard{padding:18px 16px}.bar{grid-template-columns:1fr 60px}.bar .lbl{grid-column:1/-1}
  .ngrid{grid-template-columns:repeat(5,1fr)}
  .hero{padding:22px 18px}
}

/* ---------- login / shell ---------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:16px}
.auth .card{width:min(420px,100%);padding:28px}
.auth h1{font-size:1.35rem;margin:0 0 4px}
.auth p{margin:0 0 16px;color:var(--muted);font-size:.93rem}
.field{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:9px;font:inherit;color:var(--ink);background:var(--card)}
.field:focus{outline:none;border-color:var(--accent)}
.code{letter-spacing:.5em;text-align:center;font-size:1.4rem;font-weight:700}
.err{color:var(--bad);font-size:.9rem;min-height:1.3em;margin-top:8px}
.userbar{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;font-size:.9rem;color:var(--muted);flex-wrap:wrap}
.userbar a,.linkbtn{color:var(--accent);cursor:pointer;background:none;border:0;padding:0;font:inherit;text-decoration:none}
#wm{position:fixed;inset:0;pointer-events:none;z-index:9998;opacity:.13;transition:background-position 2s}
.qmark{text-align:right;margin-top:10px;font-size:.72rem;color:var(--muted);opacity:.8;pointer-events:none}
.qcard{position:relative}
#shield{position:fixed;inset:0;z-index:9999;background:var(--bg);display:grid;place-items:center;text-align:center;padding:20px;visibility:hidden;opacity:0;pointer-events:none;will-change:opacity;transform:translateZ(0);contain:strict}
#shield.on{visibility:visible;opacity:1;pointer-events:auto}
body.shielded #app{visibility:hidden}
body.noselect{-webkit-user-select:none;user-select:none}
@media print{body *{display:none!important}body::after{content:"Printing is disabled.";display:block}}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 16px;border-radius:9px;font-size:.9rem;z-index:60}
.loading{padding:60px;text-align:center;color:var(--muted)}
.adm-tabs{display:flex;gap:6px;margin:10px 0 14px;flex-wrap:wrap}
table.grid{width:100%;border-collapse:collapse;font-size:.86rem}
.grid th,.grid td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
.grid th{color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.05em}
.tw{overflow-x:auto}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:720px){.form-grid{grid-template-columns:1fr}}
.chip{display:inline-block;font-size:.72rem;padding:2px 8px;border-radius:999px;background:var(--soft);border:1px solid var(--line);margin:1px}
.chip.ok{color:var(--ok);border-color:var(--ok)}.chip.bad{color:var(--bad);border-color:var(--bad)}.chip.warn{color:var(--warn);border-color:var(--warn)}
.btn.sm{padding:5px 10px;font-size:.8rem}

/* density: compact */
body.compact .wrap{padding-top:14px}
body.compact .qcard{padding:16px 18px;margin-top:10px}
body.compact .stem{margin:2px 0 12px}
body.compact .opts{gap:6px}
body.compact .opt{padding:8px 12px;border-width:1.5px}
body.compact .opt .l{flex-basis:24px;height:24px}
body.compact .qhead{margin-bottom:8px}
body.compact .qfoot{margin-top:14px}
body.compact .explain{margin-top:12px;padding:10px 12px}
body.compact .card.sec{padding:14px 16px;margin-top:10px}
body.compact .hero{padding:18px 20px;margin-bottom:12px}
body.compact .setup{gap:10px}
body.compact .setup .card{padding:14px}
body.compact .topbar .in{padding:6px 16px}
.disp .pills{margin:6px 0 14px}

/* ---------- login ---------- */
.login{min-height:100vh;display:grid;grid-template-columns:minmax(320px,1.05fr) 1fr;background:var(--bg)}
.login-brand{position:relative;overflow:hidden;color:#fff;background:radial-gradient(1200px 600px at -10% -10%,#2b5a91 0,transparent 60%),radial-gradient(800px 500px at 110% 110%,#1d4f86 0,transparent 55%),linear-gradient(160deg,#0b1f35,#0f2a47 55%,#123a63);display:flex;align-items:center;justify-content:center;padding:48px 40px}
.login-brand::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:36px 36px;mask-image:radial-gradient(circle at 30% 40%,#000 0,transparent 75%)}
.lb-inner{position:relative;max-width:440px;width:100%}
.lb-inner h1{font-size:2rem;letter-spacing:-.02em;margin:18px 0 4px}
.lb-tag{font-size:1.05rem;opacity:.8;margin:0 0 26px}
.lb-feats{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.lb-feats li{display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:12px 14px;backdrop-filter:blur(4px)}
.lb-feats span{font-size:1.25rem;line-height:1.2}
.lb-feats b{display:block;font-size:.95rem}
.lb-feats small{opacity:.75;font-size:.84rem}
.lb-domains{display:flex;gap:6px;margin-top:22px;flex-wrap:wrap}
.lb-domains i{font-style:normal;font-size:.72rem;font-weight:700;letter-spacing:.04em;padding:4px 8px;border-radius:999px;background:rgba(96,165,250,.16);border:1px solid rgba(96,165,250,.35);color:#bfdbfe}
.login-form{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 24px}
.lf-card{width:min(420px,100%);background:var(--card);border:1px solid var(--line);border-radius:18px;padding:32px 30px;box-shadow:0 10px 40px rgba(16,32,52,.08)}
.lf-card h2{font-size:1.55rem;margin:4px 0 6px;letter-spacing:-.01em}
.lf-card p{margin:0 0 18px;font-size:.93rem}
.lf-step{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.lf-label{display:block;font-weight:600;font-size:.86rem;margin-bottom:6px}
.lf-input{position:relative}
.lf-input span{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:.95rem}
.lf-input .field{padding-left:38px;height:48px;border-radius:11px}
.lf-btn{width:100%;margin-top:14px;height:48px;border-radius:11px;font-size:1rem}
.lf-alt{margin:16px 0 0;font-size:.85rem}
.lf-foot{margin-top:18px;font-size:.8rem;color:var(--muted);text-align:center}
.otp{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.otp input{height:56px;text-align:center;font-size:1.5rem;font-weight:700;border:1.5px solid var(--line);border-radius:11px;background:var(--soft);color:var(--ink);font-family:inherit;min-width:0}
.otp input:focus{outline:none;border-color:var(--accent);background:var(--card);box-shadow:0 0 0 4px var(--accent-soft)}
@media (max-width:860px){.login{grid-template-columns:1fr}.login-brand{padding:28px 20px}.lb-feats,.lb-domains{display:none}.lb-inner{text-align:center}.lb-inner svg{width:64px;height:76px}.lb-inner h1{font-size:1.45rem;margin-top:10px}.lb-tag{margin:0}.login-form{padding:24px 16px;justify-content:flex-start}.lf-card{padding:24px 20px}}