:root{
  --ink:#070d0b; --ink-2:#0e1814; --surface:#12201b; --surface-2:#172a23;
  --line:rgba(232,244,236,.12); --text:#e8f4ec; --muted:#8fa698;
  --green:#1bbf7a; --green-deep:#0f8f58; --violet:#6a5ce0; --violet-2:#8f84f0;
  --irat:#f0a35a; --grat:#1bbf7a;
  --radius:18px; --max:1120px;
  --font:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--text);font:16px/1.6 var(--font);-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* header */
header.top{position:sticky;top:0;z-index:20;background:rgba(7,13,11,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand b{font-size:17px;letter-spacing:.2px;white-space:nowrap}
.brand small{display:block;font-size:11px;color:var(--muted);line-height:1.1;white-space:nowrap}
nav.menu{margin-left:auto;display:flex;gap:22px;font-size:14px;font-weight:600}
nav.menu a{text-decoration:none;color:#c9d9cf;white-space:nowrap}
nav.menu a:hover{color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 22px;font-weight:700;font-size:15px;text-decoration:none;border:1px solid transparent;transition:.15s}
.btn-green{background:var(--green);color:#04110b;box-shadow:0 6px 24px rgba(27,191,122,.28)}
.btn-green:hover{background:#25d08a}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:rgba(232,244,236,.35)}
.btn-sm{padding:8px 16px;font-size:14px}
@media (max-width:980px){nav.menu{display:none}.top .hdr-help{margin-left:auto}}
@media (max-width:480px){.brand small{display:none}.top .btn-sm{padding:8px 14px;font-size:13px}}
.btn{white-space:nowrap}

/* hero */
.hero{position:relative;overflow:hidden;padding:72px 0 40px}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;pointer-events:none}
.hero:before{width:520px;height:520px;background:var(--violet);left:-160px;top:-120px;opacity:.35}
.hero:after{width:480px;height:480px;background:var(--green-deep);right:-140px;top:120px;opacity:.35}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--violet-2);margin-bottom:14px}
h1{font-size:clamp(32px,4.6vw,52px);line-height:1.08;margin:0 0 18px;letter-spacing:-.5px}
h1 em{font-style:normal;color:var(--green)}
.lead{font-size:18px;color:#c3d4c9;margin:0 0 28px;max-width:540px}
.explain{margin:-12px 0 26px;padding:12px 16px;border-left:3px solid var(--violet);background:rgba(106,92,224,.10);border-radius:0 10px 10px 0;color:#c9d9cf;font-size:15px;max-width:540px}
.explain b{color:#fff}
.cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.note{margin-top:16px;font-size:14px;color:var(--muted)}
.note a{color:#c9d9cf}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}.hero{padding-top:48px}}

/* screenshot frame */
.shot{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.06)}
.shot .bar{height:30px;background:#eef0f6;display:flex;align-items:center;gap:6px;padding:0 12px}
.shot .bar i{width:10px;height:10px;border-radius:50%;background:#d5d8e2}
.shot .bar span{margin-left:10px;font-size:11px;color:#7a8095;font-family:var(--font)}
.shot img{width:100%;height:auto}
.demo-tag{font-size:12px;color:var(--muted);margin-top:10px;text-align:right}

/* sections */
section{padding:72px 0}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head h2{font-size:clamp(26px,3.2vw,38px);line-height:1.15;margin:0 0 12px;letter-spacing:-.3px}
.sec-head p{color:var(--muted);margin:0;font-size:17px}
.alt{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* benefits */
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card p b{color:var(--text)}
.ico{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;background:rgba(27,191,122,.14);color:var(--green)}
.ico.v{background:rgba(106,92,224,.18);color:var(--violet-2)}
@media (max-width:820px){.benefits{grid-template-columns:1fr}}

/* steps */
.shot-todo{border:2px dashed rgba(232,244,236,.22);border-radius:14px;min-height:220px;display:grid;place-items:center;text-align:center;color:var(--muted);font-weight:700;padding:20px}
.shot-todo small{font-weight:400}
.step{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center;margin-bottom:64px}
.step:last-child{margin-bottom:0}
.step.rev .txt{order:2}
.num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--violet);color:#fff;font-weight:800;margin-bottom:14px}
.step h3{font-size:26px;line-height:1.2;margin:0 0 12px}
.step p{color:#c3d4c9;margin:0 0 14px}
.step ul{margin:0;padding:0;list-style:none}
.step li{position:relative;padding-left:26px;margin:8px 0;color:var(--muted);font-size:15px}
.step li:before{content:"";position:absolute;left:0;top:7px;width:14px;height:14px;border-radius:50%;background:var(--green-deep);box-shadow:inset 0 0 0 4px var(--surface)}
.pill{display:inline-block;font-size:12px;font-weight:800;padding:3px 10px;border-radius:999px;margin-right:6px}
.pill.irat{background:rgba(240,163,90,.16);color:var(--irat)}
.pill.grat{background:rgba(27,191,122,.16);color:var(--grat)}
@media (max-width:900px){.step{grid-template-columns:1fr;gap:24px}.step.rev .txt{order:0}}


/* proctoring */
.proc{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.proc .card h3{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.proc ul{list-style:none;margin:0;padding:0}
.proc li{position:relative;padding:8px 0 8px 26px;border-top:1px solid var(--line);color:#c9d9cf;font-size:15px}
.proc li:first-child{border-top:0}
.proc li:before{content:"";position:absolute;left:2px;top:15px;width:10px;height:10px;border-radius:3px;background:var(--violet-2)}
.ladder{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.ladder span{font-size:13px;font-weight:700;padding:6px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line)}
.ladder span:nth-child(1){color:#f2c46b}.ladder span:nth-child(2){color:var(--irat)}.ladder span:nth-child(3){color:#ff7a7a}
.callout{display:flex;gap:14px;align-items:flex-start;background:rgba(240,163,90,.10);border:1px solid rgba(240,163,90,.35);border-radius:14px;padding:16px 20px;margin-bottom:20px;color:#f0c79a}
.callout svg{flex:none;margin-top:2px}
.callout p{margin:0;color:#e8d6c2;font-size:15px}
.callout b{color:#ffd9b0}
.teacher-sees{margin-top:18px;color:var(--muted);font-size:15px}
.teacher-sees b{color:var(--text)}
@media (max-width:820px){.proc{grid-template-columns:1fr}}


/* support */
.support{padding:84px 0;background:radial-gradient(520px 240px at 12% 30%,rgba(27,191,122,.16),transparent),var(--ink)}
.support .box{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;background:var(--surface);border:1px solid rgba(27,191,122,.45);border-radius:22px;padding:36px 40px;box-shadow:0 0 0 1px rgba(27,191,122,.12),0 24px 60px rgba(0,0,0,.35)}
.support h2{font-size:clamp(26px,3.2vw,38px);margin:6px 0 10px;line-height:1.15}
.support p{margin:0;color:#c3d4c9;font-size:17px;max-width:620px}
.support ul{margin:14px 0 0;padding:0;list-style:none;color:var(--muted);font-size:15px}
.support li{padding:3px 0 3px 22px;position:relative}
.support li:before{content:"→";position:absolute;left:0;color:var(--green)}
.btn-support{font-size:17px;padding:16px 30px}
.top .hdr-price,.top .hdr-panel{margin-left:-8px}
@media (max-width:560px){.top .hdr-price{display:none}.top .wrap{gap:10px}.brand span{display:none}}
@media (max-width:600px){.support .box{padding:26px 22px}.btn-support{width:100%}}

.also{margin:56px 0 0;padding:18px 22px;border:1px solid var(--line);border-radius:14px;color:var(--muted);font-size:15px;text-align:center}
.also b{color:var(--text)}
/* features */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.features .card{padding:20px}
.features h3{font-size:16px}
@media (max-width:980px){.features{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.features{grid-template-columns:1fr}}


/* carousel */
.carousel{position:relative}
.track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;scrollbar-width:none;border-radius:16px;outline:none}
.track::-webkit-scrollbar{display:none}
.track:focus-visible{box-shadow:0 0 0 2px var(--green)}
.slide{flex:0 0 100%;margin:0;scroll-snap-align:center}
.frame{background:#eef0f6;border-radius:16px;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.frame img{width:100%;height:100%;object-fit:contain;padding:18px}
.slide-todo{color:#7a8095;font-weight:700;border:2px dashed #c9cdd8;border-radius:12px;padding:40px 60px}
.slide figcaption{display:flex;align-items:center;gap:12px;margin-top:18px;font-size:20px;font-weight:700}
.snum{display:inline-grid;place-items:center;flex:none;width:32px;height:32px;border-radius:50%;background:var(--violet);color:#fff;font-size:15px}
.carousel .nav{position:absolute;top:calc(50% - 40px);transform:translateY(-50%);width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:rgba(7,13,11,.75);color:#fff;font-size:30px;line-height:1;cursor:pointer;display:grid;place-items:center;backdrop-filter:blur(6px)}
.carousel .nav:hover{background:rgba(27,191,122,.9);color:#04110b}
.carousel .prev{left:-24px}.carousel .next{right:-24px}
.cbar{display:flex;align-items:center;justify-content:space-between;margin-top:14px}
.dots{display:flex;gap:8px}
.dots button{width:10px;height:10px;border-radius:50%;border:0;padding:0;background:rgba(232,244,236,.25);cursor:pointer}
.dots button[aria-current="true"]{background:var(--green);width:26px;border-radius:5px}
.count{color:var(--muted);font-size:14px}
@media (max-width:1180px){.carousel .prev{left:8px}.carousel .next{right:8px}}
@media (max-width:600px){.frame{aspect-ratio:4/3}.frame img{padding:8px}.slide figcaption{font-size:16px}.carousel .nav{display:none}}
/* proctoring calm */
.pgrid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.pgrid h2{font-size:clamp(26px,3.2vw,38px);line-height:1.15;margin:0 0 16px}
.plead{color:#c3d4c9;margin:0 0 12px;font-size:16px}
.rules{margin:0;border-top:1px solid var(--line)}
.rules>div{display:grid;grid-template-columns:160px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.rules dt{font-weight:700}
.rules dd{margin:0;color:#c3d4c9}
.pnote{margin:18px 0 0;color:var(--muted);font-size:14px;padding-left:14px;border-left:2px solid var(--line)}
@media (max-width:860px){.pgrid{grid-template-columns:1fr;gap:28px}.rules>div{grid-template-columns:1fr;gap:4px}}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch}
.plan{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px}
.plan.hot{border-color:var(--green);box-shadow:0 0 0 1px var(--green),0 20px 50px rgba(27,191,122,.12);position:relative}
.plan.hot .badge{position:absolute;top:-12px;left:22px;background:var(--green);color:#04110b;font-size:12px;font-weight:800;padding:3px 10px;border-radius:999px}
.plan h3{margin:0 0 4px;font-size:18px}
.plan .for{color:var(--muted);font-size:14px;min-height:42px;margin:0 0 14px}
.price{font-size:34px;font-weight:800;letter-spacing:-.5px;line-height:1}
.price small{font-size:15px;font-weight:600;color:var(--muted)}
.plan ul{list-style:none;padding:0;margin:20px 0 24px;flex:1}
.plan li{padding:7px 0 7px 24px;position:relative;font-size:14.5px;color:#c9d9cf;border-top:1px solid var(--line)}
.plan li:first-child{border-top:0}
.plan li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:800}
.plan li.ai:before{content:"✦";color:var(--violet-2)}
.plan .btn{width:100%}
.packs{margin-top:20px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;background:var(--surface);border:1px dashed rgba(143,132,240,.45);border-radius:var(--radius);padding:18px 22px;color:#c9d9cf;font-size:15px}
.packs b{color:#fff}
.fine{margin-top:14px;color:var(--muted);font-size:13px}
@media (max-width:900px){.plans{grid-template-columns:1fr;max-width:460px}}
@media (max-width:560px){.plans{grid-template-columns:1fr}}

/* faq */
.faq{max-width:820px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:10px;padding:0 20px}
.faq summary{cursor:pointer;list-style:none;padding:18px 28px 18px 0;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:0;top:14px;font-size:22px;color:var(--muted);transition:.2s}
.faq details[open] summary:after{transform:rotate(45deg)}
.faq details p{margin:0 0 18px;color:var(--muted)}
.guide-link{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:400px){.guide-link .btn{white-space:normal;text-align:center}}

/* final cta */
.final{text-align:center;padding:84px 0;background:radial-gradient(600px 260px at 50% 0%,rgba(106,92,224,.28),transparent),var(--ink-2);border-top:1px solid var(--line)}
.final h2{font-size:clamp(26px,3.4vw,40px);margin:0 0 12px}
.final p{color:var(--muted);margin:0 auto 28px;max-width:560px}
.final .cta{justify-content:center}

footer{padding:28px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;justify-content:space-between}
footer nav{display:flex;flex-wrap:wrap;gap:18px}
footer a{text-decoration:none}
footer a:hover{color:#fff}

/* language switcher */
.lang{position:relative;font-size:13px;font-weight:700}
.lang summary{list-style:none;cursor:pointer;padding:7px 10px;border:1px solid var(--line);border-radius:999px;color:#c9d9cf;white-space:nowrap}
.lang summary::-webkit-details-marker{display:none}

.lang[open] summary{border-color:rgba(232,244,236,.35)}
.lang ul{position:absolute;right:0;top:calc(100% + 6px);margin:0;padding:6px;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:12px;min-width:130px;box-shadow:0 16px 40px rgba(0,0,0,.45)}
.lang li a{display:block;padding:8px 10px;border-radius:8px;text-decoration:none;color:#c9d9cf}
.lang li a:hover{background:var(--surface-2);color:#fff}
.lang li a[aria-current="page"]{color:var(--green)}

@media (max-width:480px){.lang summary{padding:7px 8px}}

/* support modal */
.hidden{display:none!important}
body.modal-open{overflow:hidden}
.modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:16px}
.modal-backdrop{position:absolute;inset:0;background:rgba(3,7,6,.72);backdrop-filter:blur(4px)}
.modal-card{position:relative;width:100%;max-width:480px;max-height:calc(100vh - 32px);overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px 26px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.modal-card h2{margin:0 0 6px;font-size:24px}
.modal-lead{margin:0 0 16px;color:var(--muted);font-size:15px}
.modal-card label{display:block;margin:12px 0 6px;font-size:14px;font-weight:700}
.modal-card .opt{font-weight:400;color:var(--muted)}
.modal-card input,.modal-card textarea{width:100%;font:inherit;font-size:15px;color:var(--text);background:var(--ink);border:1px solid var(--line);border-radius:12px;padding:11px 14px}
.modal-card input:focus,.modal-card textarea:focus{outline:none;border-color:var(--green)}
.modal-card textarea{resize:vertical;min-height:110px}
.modal-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
button.btn{cursor:pointer;font-family:inherit}
button.btn-ghost{background:transparent;color:var(--text)}
.modal-close{position:absolute;top:12px;right:14px;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:22px;line-height:1;cursor:pointer}
.modal-close:hover{color:#fff}
.msg{margin-top:14px;font-size:14px}
.msg.error{color:#ff9a9a}
.msg.ok{color:var(--green)}
.btn[disabled]{opacity:.6;cursor:default}
.pnote.warn{color:#f4e3c1;font-size:15px;background:rgba(245,166,35,.08);border:1px solid rgba(245,166,35,.45);border-left:4px solid #f5a623;border-radius:10px;padding:14px 16px}
.pnote.warn b{color:#ffd58a}