:root{
  --navy:#0b1f3a;--navy2:#132d52;--ink:#14233b;--mut:#5b6b82;--line:#e2e8f1;--bg:#f5f7fb;--card:#fff;
  --green:#10b981;--green2:#059669;--greenbg:#e8faf3;--gold:#f5b942;--red:#dc2626;--redbg:#fdecec;--blue:#2563eb;--bluebg:#eaf1ff;
  --r:14px;--sh:0 6px 24px rgba(11,31,58,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;letter-spacing:-.02em}
p{margin:0 0 1em}
a{color:var(--blue)}
button{font:inherit;cursor:pointer}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.loading{text-align:center;padding:80px 0;color:var(--mut)}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(11,31,58,.97);color:#fff;backdrop-filter:blur(6px)}
.nav .wrap{display:flex;align-items:center;gap:14px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff;text-decoration:none;letter-spacing:-.02em}
.logo i{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--green);font-style:normal;font-size:17px}
.logo small{font-weight:500;opacity:.65;font-size:12px;display:block;line-height:1;margin-top:2px;letter-spacing:0}
.nav .sp{flex:1}
.nav a.l{color:#cdd8ea;text-decoration:none;font-size:14.5px}
.nav a.l:hover{color:#fff}
@media(max-width:640px){.nav a.hide{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:11px;padding:11px 18px;font-weight:700;font-size:15px;text-decoration:none;transition:.15s;background:var(--green);color:#04281c}
.btn:hover{background:#34d399;transform:translateY(-1px)}
.btn.big{padding:15px 26px;font-size:17px;border-radius:13px}
.btn.ghost{background:transparent;color:inherit;border:1.5px solid currentColor;opacity:.9}
.btn.ghost:hover{opacity:1;background:rgba(127,127,127,.1)}
.btn.dark{background:var(--navy);color:#fff}.btn.dark:hover{background:var(--navy2)}
.btn.light{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn.light:hover{background:#f1f5fb}
.btn.sm{padding:7px 12px;font-size:13.5px;border-radius:9px}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* hero */
.hero{background:radial-gradient(1200px 500px at 80% -10%,#1d4a85 0,transparent 60%),linear-gradient(180deg,var(--navy),#0e2748);color:#fff;padding:64px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.hero h1{font-size:clamp(32px,5vw,52px);font-weight:850}
.hero h1 em{font-style:normal;color:#34d399}
.hero p.lead{font-size:18.5px;color:#cfdbee;max-width:560px}
.pill{display:inline-block;background:rgba(52,211,153,.14);color:#6ee7b7;border:1px solid rgba(52,211,153,.35);padding:5px 12px;border-radius:99px;font-size:13px;font-weight:700;margin-bottom:16px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 14px}
.hero .tiny{font-size:13.5px;color:#9fb2cf}
.mock{background:#fff;color:var(--ink);border-radius:18px;padding:22px;box-shadow:0 30px 70px rgba(0,0,0,.35);transform:rotate(1.2deg)}
.mock h4{margin:0 0 4px;font-size:13px;color:var(--mut);font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.mock .big{font-size:42px;font-weight:850;letter-spacing:-.03em;line-height:1}
.mock .tag{display:inline-block;margin:8px 0 14px}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr}.mock{transform:none}}

section.s{padding:64px 0}
section.s.alt{background:#fff;border-block:1px solid var(--line)}
.s h2{font-size:clamp(26px,3.6vw,36px);text-align:center}
.s .sub{text-align:center;color:var(--mut);max-width:680px;margin:0 auto 36px;font-size:17px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.g3,.g2{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--sh)}
.card h3{font-size:19px}
.card p{color:var(--mut);margin:0}
.ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:var(--greenbg);margin-bottom:12px}
.steps{counter-reset:s}
.steps .card:before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;font-weight:800;margin-bottom:12px}

/* exam cards */
.ex h3{font-size:22px;display:flex;align-items:center;gap:10px}
.ex ul{list-style:none;padding:0;margin:12px 0 16px;font-size:14.5px}
.ex li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px dashed var(--line)}
.ex li b{white-space:nowrap}
.ex .row{display:flex;gap:8px;flex-wrap:wrap}
.ex .meta{font-size:13px;color:var(--mut);margin-bottom:12px}

.price{max-width:520px;margin:0 auto;text-align:center;border:2px solid var(--green);position:relative}
.price .amt{font-size:54px;font-weight:850;letter-spacing:-.03em;line-height:1.1}
.price .amt small{font-size:18px;font-weight:600;color:var(--mut)}
.price ul{text-align:left;list-style:none;padding:0;margin:18px 0}
.price li{padding:6px 0 6px 30px;position:relative}
.price li:before{content:"✓";position:absolute;left:0;top:6px;width:20px;height:20px;border-radius:50%;background:var(--green);color:#fff;font-size:13px;font-weight:800;display:grid;place-items:center}
details.faq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
details.faq summary{font-weight:700;cursor:pointer}
details.faq p{margin:10px 0 0;color:var(--mut)}
footer{background:var(--navy);color:#a9b9d3;padding:30px 0;font-size:13.5px;text-align:center}

/* tags */
.tag{display:inline-block;padding:4px 11px;border-radius:99px;font-size:12.5px;font-weight:800;letter-spacing:.02em}
.tag.DSS{background:#fff4d6;color:#8a5a00}.tag.DS{background:var(--greenbg);color:#04694b}.tag.ANS{background:var(--redbg);color:#a11616}
.tag.info{background:var(--bluebg);color:#1c46b3}

/* panel */
.page{padding:32px 0 70px}
.page h1{font-size:30px}
table.t{width:100%;border-collapse:collapse;font-size:14.5px}
.t th,.t td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
.t th{color:var(--mut);font-weight:600;font-size:13px}
.tablewrap{overflow-x:auto}
select,input{font:inherit;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus,button:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:1px}

/* exam */
.exbar{position:sticky;top:60px;z-index:10;background:#fff;border-bottom:1px solid var(--line)}
.exbar .wrap{display:flex;align-items:center;gap:14px;min-height:56px;flex-wrap:wrap;padding-block:8px}
.exbar .ti{font-weight:700;font-size:14.5px}
.exbar .ti small{display:block;color:var(--mut);font-weight:500}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:19px;background:var(--navy);color:#fff;padding:6px 14px;border-radius:10px}
.timer.low{background:var(--red)}
.prog{height:5px;background:var(--line)}.prog i{display:block;height:100%;background:var(--green);transition:width .2s}
.exam{display:grid;grid-template-columns:1fr 270px;gap:22px;padding-top:22px;align-items:start}
@media(max-width:900px){.exam{grid-template-columns:1fr}}
.q .area{font-size:12.5px;font-weight:700;color:var(--mut);text-transform:uppercase;letter-spacing:.05em}
.q .num{font-size:14px;color:var(--mut);margin:4px 0 12px}
.caso{background:#f7f9fd;border-left:4px solid var(--blue);padding:14px 16px;border-radius:8px;margin-bottom:16px;white-space:pre-line;font-size:15.5px}
.caso b.h{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);margin-bottom:4px}
.stem{font-size:17.5px;font-weight:500;white-space:pre-line;margin-bottom:18px}
.opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:10px;font-size:16px;color:var(--ink);white-space:pre-line}
.opt:hover{border-color:#9db4d6}
.opt b{flex:none;width:28px;height:28px;border-radius:50%;border:1.5px solid #b8c5d9;display:grid;place-items:center;font-size:14px}
.opt.sel{border-color:var(--green2);background:var(--greenbg)}
.opt.sel b{background:var(--green2);border-color:var(--green2);color:#fff}
.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:18px;flex-wrap:wrap}
.side h4{margin:0 0 10px;font-size:14px}
.dots{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.dots button{height:34px;border-radius:8px;border:1.5px solid var(--line);background:#fff;font-size:13px;font-weight:600;color:var(--mut);position:relative;padding:0}
.dots button.a{background:var(--navy);border-color:var(--navy);color:#fff}
.dots button.c{outline:3px solid var(--green);outline-offset:1px}
.dots button.f:after{content:"";position:absolute;top:-4px;right:-4px;width:11px;height:11px;border-radius:50%;background:var(--gold);border:2px solid #fff}
.legend{font-size:12.5px;color:var(--mut);margin-top:12px;display:flex;gap:12px;flex-wrap:wrap}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:4px;vertical-align:-1px}

/* results */
.verdict{background:linear-gradient(135deg,var(--navy),#17406f);color:#fff;border-radius:18px;padding:28px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}
.verdict h1{font-size:clamp(24px,4vw,34px);margin-bottom:6px}
.verdict p{color:#cfdbee;margin:0}
.verdict .n{text-align:center;background:rgba(255,255,255,.1);border-radius:14px;padding:14px 22px}
.verdict .n b{display:block;font-size:40px;line-height:1;font-weight:850}
.verdict .n span{font-size:12.5px;color:#cfdbee}
@media(max-width:640px){.verdict{grid-template-columns:1fr}}
.scale{position:relative;height:12px;border-radius:99px;margin:22px 0 22px;background:linear-gradient(90deg,#f6b4b4 0 50%,#9be7c8 50% 75%,#f8d98a 75% 100%)}
.scale .m{position:absolute;top:-6px;width:4px;height:24px;border-radius:3px;background:var(--navy);transform:translateX(-50%)}
.scale .m:after{content:attr(data-v);position:absolute;top:-22px;left:50%;transform:translateX(-50%);font-size:13px;font-weight:800;white-space:nowrap}
.scale .tk{position:absolute;top:16px;font-size:11px;color:var(--mut);transform:translateX(-50%)}
.arow{padding:16px 0;border-top:1px solid var(--line)}
.arow .h{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap}
.arow .h b{font-size:16px}
.subbar{display:grid;grid-template-columns:1fr 110px 54px;gap:10px;align-items:center;font-size:14px;color:var(--mut);padding:3px 0}
.bar{height:8px;background:var(--line);border-radius:9px;overflow:hidden}.bar i{display:block;height:100%;background:var(--green)}
.bar.lo i{background:var(--red)}.bar.mid i{background:var(--gold)}
details.acc{border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:10px;overflow:hidden}
details.acc>summary{padding:14px 16px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;gap:10px;align-items:center}
details.acc>summary span.c{background:var(--redbg);color:#a11616;border-radius:99px;padding:2px 10px;font-size:13px;white-space:nowrap}
details.acc .in{padding:0 14px 12px}
details.acc details.acc{background:#fafbfe}
.wq{border-top:1px solid var(--line);padding:14px 2px}
.wq .stem{font-size:15.5px;margin-bottom:10px}
.wq .caso{font-size:14px}
.ans{padding:8px 12px;border-radius:9px;margin-bottom:6px;font-size:14.5px;white-space:pre-line}
.ans.bad{background:var(--redbg);color:#8f1313}.ans.good{background:var(--greenbg);color:#04573f}
.ans b{font-size:12px;text-transform:uppercase;letter-spacing:.05em;display:block;opacity:.8}
.fb{font-size:14.5px;color:#33435c;background:#f7f9fd;border-radius:9px;padding:10px 12px}
.fb b{color:var(--blue)}
.upsell{background:#fff8e6;border:1.5px solid var(--gold);border-radius:16px;padding:22px;display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:22px 0}
.upsell h3{margin:0 0 4px}.upsell p{margin:0;color:#6b5a2b}
.note{font-size:13px;color:var(--mut)}

/* modal + toast */
.modal{position:fixed;inset:0;background:rgba(8,18,36,.6);z-index:50;display:grid;place-items:center;padding:16px;overflow:auto}
.modal[hidden],.toast[hidden]{display:none}
.box{background:#fff;border-radius:18px;padding:26px;width:100%;max-width:440px;position:relative;max-height:calc(100vh - 32px);overflow:auto}
.box h2{font-size:23px}
.box .x{position:absolute;top:10px;right:12px;border:0;background:none;font-size:26px;color:var(--mut);line-height:1}
.box label{display:block;font-size:13.5px;font-weight:600;margin:12px 0 4px}
.box .err{color:var(--red);font-size:14px;margin-top:10px;min-height:20px}
.box .sw{font-size:14px;text-align:center;margin-top:14px;color:var(--mut)}
.box .sw a{cursor:pointer;font-weight:700}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:12px 20px;border-radius:12px;z-index:60;box-shadow:var(--sh);max-width:90vw;font-size:15px}