:root{
  --bg:#f3f5f9; --surface:#fff; --surface-2:#f7f8fb; --line:#e3e7ef; --text:#141a26; --muted:#5d6777;
  --brand:#0b3d91; --brand-2:#1557c9; --brand-soft:#e8effc;
  --ok:#128a4a; --ok-soft:#e5f6ec; --bad:#d7261e; --bad-soft:#fdeceb; --warn:#e8a200;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 4px 16px rgba(16,24,40,.06);
  --r:16px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0e131c; --surface:#161d29; --surface-2:#1b2331; --line:#283246; --text:#e8edf5; --muted:#99a3b5;
    --brand:#5b8def; --brand-2:#7aa5f5; --brand-soft:#1c2a47;
    --ok:#3ccf7f; --ok-soft:#133224; --bad:#ff6b63; --bad-soft:#3a1a1a;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25); color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e131c; --surface:#161d29; --surface-2:#1b2331; --line:#283246; --text:#e8edf5; --muted:#99a3b5;
  --brand:#5b8def; --brand-2:#7aa5f5; --brand-soft:#1c2a47;
  --ok:#3ccf7f; --ok-soft:#133224; --bad:#ff6b63; --bad-soft:#3a1a1a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25); color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--text);font:16px/1.5 Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
button{font:inherit;color:inherit;cursor:pointer}
a{color:var(--brand-2)}
main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:20px 16px 40px;outline:none}

.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;background:none;border:0;padding:4px;text-align:left}
.brand-mark svg{width:34px;height:34px;display:block}
.brand b{display:block;font-size:16px;letter-spacing:-.01em}
.brand small{display:block;font-size:12px;color:var(--muted)}
.theme-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface);font-size:18px}

.foot{max-width:880px;margin:0 auto;padding:18px 16px 28px;font-size:12.5px;color:var(--muted);text-align:center}

h1{font-size:clamp(24px,5vw,32px);line-height:1.15;letter-spacing:-.02em;margin:6px 0 6px}
h2{font-size:18px;margin:28px 0 12px;letter-spacing:-.01em}
.lead{color:var(--muted);margin:0 0 18px}

/* hero stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0 6px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.stat b{display:block;font-size:22px;font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:var(--muted)}

/* category chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:7px 14px;font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.chip small{font-weight:500;color:var(--muted)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.chip[aria-pressed="true"] small{color:#dbe6ff}

/* area cards */
.areas{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.area{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}
.area-h{display:flex;gap:12px;align-items:flex-start}
.area-ico{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft)}
.area-ico svg{width:28px;height:28px}
.area h3{margin:0;font-size:16px;line-height:1.25}
.area p{margin:2px 0 0;font-size:13px;color:var(--muted)}
.bar{height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden;display:flex;border:1px solid var(--line)}
.bar i{display:block;height:100%}
.bar .g{background:var(--ok)} .bar .r{background:var(--bad)}
.bar-l{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:-6px}
.area-a{display:flex;gap:8px;flex-wrap:wrap}

.btn{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:10px 14px;font-weight:600;font-size:14px;display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:transform .08s,background .15s}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-2)}
.btn.ghost{background:transparent}
.btn.big{padding:14px 20px;font-size:16px;border-radius:14px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sm{padding:7px 11px;font-size:13px;border-radius:10px}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.test-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;background:linear-gradient(135deg,var(--brand),#1d5fd6);color:#fff;border:0}
.test-cta h3{margin:0 0 2px;font-size:18px}
.test-cta p{margin:0;opacity:.85;font-size:14px}
.test-cta .btn{background:#fff;color:#0b3d91;border-color:#fff}
.seg{display:inline-flex;background:rgba(255,255,255,.14);border-radius:12px;padding:3px;gap:2px}
.seg button{border:0;background:none;color:#fff;padding:7px 12px;border-radius:9px;font-weight:600;font-size:14px}
.seg button[aria-pressed="true"]{background:#fff;color:#0b3d91}

/* quiz */
.qbar{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.qbar .back{border:1px solid var(--line);background:var(--surface);border-radius:10px;width:38px;height:38px;flex:none;font-size:18px}
.qbar-mid{flex:1;min-width:0}
.qbar-t{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:5px;gap:8px}
.qbar-t b{color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.prog{height:6px;border-radius:99px;background:var(--line);overflow:hidden}
.prog i{display:block;height:100%;background:var(--brand);transition:width .25s}
.score{font-size:13px;font-weight:700;display:flex;gap:8px;flex:none}
.score .g{color:var(--ok)} .score .r{color:var(--bad)}

.qcard{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.qimg{background:#fff;display:flex;justify-content:center;align-items:center;padding:12px;border-bottom:1px solid var(--line);cursor:zoom-in;position:relative}
.qimg img{width:100%;max-width:620px;height:auto;max-height:460px;object-fit:contain;display:block;border-radius:8px}
.qimg .zoom{position:absolute;right:10px;bottom:10px;font-size:12px;background:rgba(0,0,0,.6);color:#fff;border-radius:8px;padding:3px 8px}
.qbody{padding:18px}
.qmeta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.tag{font-size:12px;font-weight:600;padding:3px 9px;border-radius:99px;background:var(--surface-2);border:1px solid var(--line);color:var(--muted)}
.tag.multi{background:#fff4d6;border-color:#f3d27a;color:#7a5600}
:root[data-theme="dark"] .tag.multi{background:#3a2f10;border-color:#6b5616;color:#f1cf6b}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tag.multi{background:#3a2f10;border-color:#6b5616;color:#f1cf6b}}
.qtext{font-size:clamp(18px,3.2vw,21px);font-weight:700;line-height:1.35;letter-spacing:-.01em;margin:0 0 16px}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;align-items:flex-start;gap:12px;text-align:left;width:100%;padding:14px;border-radius:14px;border:1.5px solid var(--line);background:var(--surface-2);transition:border-color .12s,background .12s;font-size:15.5px}
.opt:hover:not(:disabled){border-color:var(--brand-2)}
.opt .k{flex:none;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;font-weight:700;font-size:14px;background:var(--surface);border:1.5px solid var(--line)}
.opt.multi .k{border-radius:6px}
.opt .t{flex:1;padding-top:2px}
.opt[aria-pressed="true"]{border-color:var(--brand);background:var(--brand-soft)}
.opt[aria-pressed="true"] .k{background:var(--brand);border-color:var(--brand);color:#fff}
.opt.ok{border-color:var(--ok);background:var(--ok-soft)}
.opt.ok .k{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.bad{border-color:var(--bad);background:var(--bad-soft)}
.opt.bad .k{background:var(--bad);border-color:var(--bad);color:#fff}
.opt.missed{border-style:dashed;border-color:var(--ok)}
.opt:disabled{cursor:default}
.opt .mark{flex:none;font-weight:700;font-size:13px;padding-top:4px}
.opt.ok .mark{color:var(--ok)} .opt.bad .mark{color:var(--bad)}

.feedback{margin-top:14px;padding:12px 14px;border-radius:12px;font-weight:600;display:flex;gap:10px;align-items:center}
.feedback.ok{background:var(--ok-soft);color:var(--ok)}
.feedback.bad{background:var(--bad-soft);color:var(--bad)}
.qfoot{display:flex;gap:10px;justify-content:space-between;align-items:center;margin-top:16px;flex-wrap:wrap}
.qfoot .src{font-size:12px;color:var(--muted)}
.kbd-hint{font-size:12px;color:var(--muted);text-align:center;margin-top:12px}
.kbd-hint kbd{font:600 11px Inter,sans-serif;border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 5px;background:var(--surface)}
.qnav{display:flex;gap:8px;margin-left:auto}

/* results */
.result{text-align:center;padding:28px 18px}
.ring{width:150px;height:150px;margin:0 auto 12px;position:relative}
.ring svg{transform:rotate(-90deg)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:34px;font-variant-numeric:tabular-nums}
.verdict{font-size:22px;font-weight:800;margin:4px 0}
.verdict.ok{color:var(--ok)} .verdict.bad{color:var(--bad)}
.rlist{display:flex;flex-direction:column;gap:8px;margin-top:18px;text-align:left}
.ritem{display:flex;gap:10px;align-items:flex-start;padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--surface);cursor:pointer;width:100%;text-align:left}
.ritem .dot{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700}
.ritem .dot.g{background:var(--ok)} .ritem .dot.r{background:var(--bad)}
.ritem img{width:52px;height:40px;object-fit:contain;background:#fff;border-radius:6px;flex:none}
.ritem span{font-size:14px}

/* browse */
.search{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.search input{flex:1;min-width:200px;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit}
.search select{padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit}
.blist{display:flex;flex-direction:column;gap:10px}
.bitem{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;display:grid;grid-template-columns:1fr auto;gap:12px}
.bitem.hasimg{grid-template-columns:1fr 120px}
.bitem h4{margin:0 0 8px;font-size:15px;line-height:1.35}
.bitem h4 small{color:var(--muted);font-weight:600;margin-right:6px}
.bitem ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:4px;font-size:14px}
.bitem li{padding:4px 8px;border-radius:8px;color:var(--muted)}
.bitem li.ok{background:var(--ok-soft);color:var(--ok);font-weight:600}
.bitem .thumb{width:120px;height:96px;background:#fff;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;cursor:zoom-in;padding:4px}
.bitem .thumb img{max-width:100%;max-height:100%;object-fit:contain}
.bitem .hidden-ans li.ok{background:none;color:var(--muted);font-weight:400}
.more{display:flex;justify-content:center;margin-top:14px}
.empty{text-align:center;color:var(--muted);padding:40px 0}

.lightbox{position:fixed;inset:0;background:rgba(5,8,15,.92);z-index:50;display:grid;place-items:center;padding:12px;cursor:zoom-out}
.lightbox[hidden]{display:none}
.lightbox img{width:min(96vw,1400px);height:auto;max-height:92vh;object-fit:contain;background:#fff;border-radius:12px;padding:6px}
.lb-close{position:absolute;top:14px;right:14px;width:42px;height:42px;border-radius:50%;border:0;background:#fff;color:#111;font-size:18px}

.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 0}
.note{font-size:13px;color:var(--muted)}

@media (max-width:560px){
  .stats{grid-template-columns:repeat(3,1fr)}
  .stat b{font-size:19px}
  .qbody{padding:16px}
  .bitem.hasimg{grid-template-columns:1fr}
  .bitem .thumb{width:100%;height:140px;order:-1}
  .qimg{padding:8px}
  .qimg img{max-height:300px}
  .kbd-hint{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* exam + company */
.exam-badge{display:inline-block;font-weight:800;letter-spacing:.06em;font-size:15px;padding:8px 18px;border-radius:999px;margin-bottom:14px}
.exam-badge.ok{background:var(--ok-soft);color:var(--ok);border:1.5px solid var(--ok)}
.exam-badge.bad{background:var(--bad-soft);color:var(--bad);border:1.5px solid var(--bad)}
.company{display:flex;gap:16px;align-items:flex-start}
.co-logo{flex:none;width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,#0b3d91,#1d5fd6);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px;letter-spacing:.04em}
.co-body{flex:1;min-width:0}
.co-body h3{margin:0;font-size:18px}
.company dl{margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.company dl div{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.company dt{font-size:12px;color:var(--muted);margin-bottom:2px}
.company dd{margin:0;font-weight:600;font-size:14.5px;word-break:break-word}
.pill-ok{color:var(--ok)}
.test-cta .seg{flex-wrap:wrap}
@media (max-width:560px){.company{flex-direction:column}}

.site-link{margin-left:auto;font-size:13px;font-weight:600;text-decoration:none;color:var(--muted);padding:8px 10px;border-radius:10px}
.site-link:hover{color:var(--brand-2)}