:root{
  --ink:#141726;
  --ink-2:#2a2f45;
  --muted:#5d6478;
  --muted-2:#7b8298;
  --line:#e4e7f0;
  --bg:#f6f7fb;
  --surface:#ffffff;
  --brand:#4f46e5;
  --brand-2:#6366f1;
  --brand-dark:#3b34c9;
  --teal:#0f9d94;
  --amber:#f0a020;
  --danger:#c0392b;
  --radius:16px;
  --radius-sm:11px;
  --shadow:0 1px 2px rgba(20,23,38,.05),0 12px 32px rgba(20,23,38,.07);
  --shadow-sm:0 1px 2px rgba(20,23,38,.06),0 6px 16px rgba(20,23,38,.05);
  --font:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.18;letter-spacing:-.02em;font-weight:700}
h1{font-size:clamp(2rem,4.2vw,3.05rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;color:var(--ink);padding:10px 16px;border-radius:0 0 10px 0;z-index:100}
.skip:focus{left:0}
:focus-visible{outline:3px solid rgba(79,70,229,.45);outline-offset:2px;border-radius:6px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,247,251,.86);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;letter-spacing:-.02em;font-size:1.12rem}
.brand:hover{color:var(--ink)}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#8b5cf6);display:grid;place-items:center;color:#fff;flex:none}
.brand-mark svg{width:19px;height:19px}
.nav{display:flex;gap:26px;margin-left:8px;font-size:.95rem}
.nav a{color:var(--ink-2);font-weight:500}
.nav a:hover{color:var(--brand)}
.nav a.is-active{color:var(--brand);font-weight:600}
.header-actions{display:flex;gap:10px;margin-left:auto;align-items:center}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 10px;cursor:pointer;color:var(--ink)}
.nav-toggle span{display:block;width:20px;height:2px;background:currentColor;margin:4px 0;border-radius:2px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:10px 18px;font:inherit;font-weight:600;font-size:.95rem;cursor:pointer;transition:transform .15s ease,background .15s ease,color .15s ease,box-shadow .15s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;box-shadow:0 6px 18px rgba(79,70,229,.28)}
.btn-primary:hover{color:#fff;box-shadow:0 10px 24px rgba(79,70,229,.35)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{color:var(--ink);border-color:#cfd4e4;box-shadow:var(--shadow-sm)}
.btn-lg{padding:13px 24px;font-size:1rem;border-radius:12px}
.btn-small{padding:8px 14px;font-size:.88rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.6;cursor:progress}

/* hero */
.hero{padding:64px 0 44px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);background:rgba(79,70,229,.09);padding:6px 11px;border-radius:999px;margin-bottom:18px}
.lead{font-size:1.12rem;color:var(--muted);max-width:34em}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 24px}
.hero-points{display:grid;gap:8px;font-size:.93rem;color:var(--muted)}
.hero-points li{position:relative;padding-left:26px}
.hero-points li::before{content:"";position:absolute;left:0;top:.42em;width:16px;height:16px;border-radius:50%;background:rgba(15,157,148,.14)}
.hero-points li::after{content:"";position:absolute;left:5px;top:.62em;width:6px;height:3px;border-left:1.6px solid var(--teal);border-bottom:1.6px solid var(--teal);transform:rotate(-45deg)}

/* hero visual */
.hero-visual{position:relative;padding-bottom:64px}
.app-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:22px;position:relative;z-index:2}
.app-card-head{display:flex;align-items:center;gap:8px;font-weight:600;font-size:.9rem;color:var(--ink-2);padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:16px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(15,157,148,.12)}
.app-card-date{margin-left:auto;font-weight:500;color:var(--muted-2);font-size:.8rem}
.progress-row{display:grid;grid-template-columns:70px 1fr 40px;align-items:center;gap:10px;font-size:.85rem;color:var(--muted);margin-bottom:12px}
.progress{height:7px;background:#eef0f8;border-radius:99px;overflow:hidden}
.progress i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),#8b5cf6)}
.progress-row b{font-size:.8rem;color:var(--ink-2);text-align:right}
.w-72{width:72%}.w-45{width:45%}.w-90{width:90%}.w-60{width:60%}
.lesson{display:flex;align-items:center;gap:12px;background:#f7f8fd;border:1px solid #eceefa;border-radius:12px;padding:11px 12px;margin-top:9px}
.lesson-time{font-weight:700;font-size:.8rem;color:var(--brand);background:#fff;border:1px solid #e3e6f7;border-radius:7px;padding:4px 7px}
.lesson b{display:block;font-size:.88rem;line-height:1.3}
.lesson small{color:var(--muted-2);font-size:.76rem}
.lesson .chip{margin-left:auto}
.chip{font-size:.72rem;font-weight:600;color:var(--teal);background:rgba(15,157,148,.1);padding:4px 8px;border-radius:99px;white-space:nowrap}
.chip-neutral{color:var(--muted);background:#eef0f8}
.float-card{position:absolute;right:0;bottom:0;background:var(--ink);color:#fff;border-radius:14px;padding:14px 18px;box-shadow:0 14px 34px rgba(20,23,38,.3);z-index:3}
.float-card b{display:block;font-size:1.25rem;line-height:1.1}
.float-card small{color:#c7cbe0;font-size:.76rem}

/* stats */
.stats{padding:8px 0 40px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.stats-grid b{display:block;font-size:1.7rem;letter-spacing:-.03em}
.stats-grid span{color:var(--muted);font-size:.88rem}

/* sections */
.section{padding:60px 0}
.section-head{max-width:640px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.feature h3{font-size:1.02rem;margin-bottom:6px}
.feature p{color:var(--muted);font-size:.92rem;margin:0}
.icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;background:rgba(79,70,229,.09);color:var(--brand)}
.icon svg{width:21px;height:21px}
.icon-teal{background:rgba(15,157,148,.1);color:var(--teal)}
.icon-amber{background:rgba(240,160,32,.12);color:#b9770c}

/* course cards */
.course-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:box-shadow .18s ease,transform .18s ease}
.course-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.course-top{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.tag{font-size:.72rem;font-weight:700;letter-spacing:.03em;color:var(--brand);background:rgba(79,70,229,.09);padding:4px 9px;border-radius:999px}
.course-hours{margin-left:auto;font-size:.78rem;color:var(--muted-2)}
.course-card h3{margin-bottom:6px}
.course-card p{color:var(--muted);font-size:.9rem;flex:1}
.course-meta{display:flex;flex-wrap:wrap;gap:10px 14px;font-size:.8rem;color:var(--muted-2);margin-bottom:16px}
.course-foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px}
.price{font-weight:700}
.price small{font-weight:500;color:var(--muted-2);font-size:.78rem}
.badge-lock{display:inline-flex;align-items:center;gap:5px;white-space:nowrap;font-size:.72rem;color:var(--muted);background:#f1f2f8;border-radius:999px;padding:3px 8px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;counter-reset:step}
.step{position:relative;padding-top:8px}
.step-num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--brand),#8b5cf6);margin-bottom:14px}
.step h3{font-size:1.02rem}
.step p{color:var(--muted);font-size:.92rem;margin:0}

/* quotes */
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.quote blockquote{margin:0 0 16px;font-size:1rem;color:var(--ink-2)}
.quote-author{display:flex;align-items:center;gap:11px;font-size:.86rem;color:var(--muted)}
.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:.82rem;flex:none}
.av-1{background:#4f46e5}.av-2{background:#0f9d94}.av-3{background:#c2410c}.av-4{background:#7c3aed}.av-5{background:#0369a1}

/* cta */
.cta{background:linear-gradient(135deg,#221f4d,#3b2f86);border-radius:22px;padding:46px;color:#fff;display:flex;align-items:center;gap:32px;justify-content:space-between;box-shadow:0 18px 44px rgba(34,31,77,.28)}
.cta h2{margin-bottom:8px}
.cta p{color:#cfd0ea;margin:0;max-width:44em}
.cta .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:none}
.cta .btn-primary:hover{color:var(--brand-dark)}

/* page head */
.page-head{padding:52px 0 26px}
.page-head p{color:var(--muted);max-width:52em;margin:0}
.breadcrumbs{font-size:.82rem;color:var(--muted-2);margin-bottom:10px}
.breadcrumbs a{color:var(--muted)}

/* filters */
.filters{display:flex;gap:9px;flex-wrap:wrap;margin:24px 0 28px}
.chip-btn{font:inherit;font-size:.86rem;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:7px 14px;cursor:pointer}
.chip-btn:hover{color:var(--brand);border-color:#cfd4e4}
.chip-btn[aria-pressed="true"]{color:#fff;background:var(--brand);border-color:var(--brand)}

/* pricing */
.plan{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.plan.is-featured{border-color:#b9b4f5;box-shadow:0 18px 44px rgba(79,70,229,.14)}
.plan-flag{position:absolute;top:-12px;left:26px;background:var(--brand);color:#fff;font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:999px}
.plan-name{font-size:.82rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand)}
.plan-price{font-size:2rem;font-weight:800;letter-spacing:-.03em;margin:10px 0 2px}
.plan-price small{font-size:.86rem;font-weight:500;color:var(--muted-2);letter-spacing:0}
.plan-desc{color:var(--muted);font-size:.9rem;margin:6px 0 18px}
.plan ul{display:grid;gap:9px;font-size:.9rem;color:var(--ink-2);margin-bottom:22px}
.plan li{position:relative;padding-left:24px}
.plan li::before{content:"";position:absolute;left:0;top:.45em;width:14px;height:14px;border-radius:50%;background:rgba(15,157,148,.13)}
.plan li::after{content:"";position:absolute;left:4.5px;top:.62em;width:5px;height:2.5px;border-left:1.6px solid var(--teal);border-bottom:1.6px solid var(--teal);transform:rotate(-45deg)}
.plan .btn{margin-top:auto}

/* team */
.person{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow-sm)}
.person .avatar{width:64px;height:64px;font-size:1.1rem;margin:0 auto 14px}
.person b{display:block}
.person span{color:var(--muted);font-size:.86rem}

/* faq */
.faq{display:grid;gap:12px;max-width:820px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:0}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.25rem;color:var(--muted-2);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .faq-body{padding:0 22px 18px;color:var(--muted);font-size:.94rem}

/* contacts */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.contact-card h3{font-size:1rem}
.contact-list{display:grid;gap:14px;font-size:.94rem}
.contact-list b{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted-2);font-weight:700}

/* auth */
.auth{padding:56px 0 72px}
.auth-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.auth-aside{background:linear-gradient(150deg,#241f56,#43309b 55%,#0f766e);color:#fff;padding:46px 44px;display:flex;flex-direction:column}
.auth-aside h2{color:#fff;font-size:1.6rem;margin-bottom:12px}
.auth-aside p{color:#d6d5ee;font-size:.95rem}
.auth-aside ul{display:grid;gap:10px;font-size:.92rem;color:#e7e6f7;margin-top:6px}
.auth-aside li{position:relative;padding-left:24px}
.auth-aside li::before{content:"";position:absolute;left:0;top:.5em;width:6px;height:6px;border-radius:50%;background:#7dd3c7}
.auth-aside .aside-foot{margin-top:auto;padding-top:28px;font-size:.82rem;color:#bfc0dd}
.auth-card{padding:46px 44px}
.auth-card h1{font-size:1.65rem;margin-bottom:6px}
.auth-sub{color:var(--muted);font-size:.93rem;margin-bottom:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.86rem;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.input{width:100%;font:inherit;font-size:.95rem;color:var(--ink);background:#fbfbfe;border:1px solid #d9ddec;border-radius:11px;padding:12px 14px;transition:border .15s ease,box-shadow .15s ease}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.14);background:#fff}
.password-wrap{position:relative}
.password-wrap .input{padding-right:76px}
.password-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:0;font:inherit;font-size:.78rem;font-weight:600;color:var(--brand);cursor:pointer;padding:6px 8px;border-radius:8px}
.password-toggle:hover{background:rgba(79,70,229,.08)}
.form-row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.84rem;margin:4px 0 20px}
.checkbox{display:flex;align-items:center;gap:8px;color:var(--muted)}
.checkbox input{width:16px;height:16px;accent-color:var(--brand)}
.form-error{background:#fdf1f0;border:1px solid #f3c9c4;color:#8f2b20;border-radius:10px;padding:11px 14px;font-size:.86rem;margin-bottom:16px}
.form-note{font-size:.78rem;color:var(--muted-2);margin-top:16px}
.form-note a{color:var(--muted)}
.auth-alt{margin-top:22px;padding-top:20px;border-top:1px solid var(--line);font-size:.88rem;color:var(--muted);text-align:center}
.auth-alt a{font-weight:600}
.divider{display:flex;align-items:center;gap:12px;color:var(--muted-2);font-size:.78rem;margin:20px 0}
.divider::before,.divider::after{content:"";height:1px;background:var(--line);flex:1}

/* legal */
.legal{max-width:820px;padding-bottom:20px}
.legal h2{font-size:1.2rem;margin-top:34px}
.legal h1{font-size:2rem}
.legal p,.legal li{color:var(--ink-2);font-size:.95rem}
.legal ul{list-style:disc;padding-left:22px;display:grid;gap:6px;margin-bottom:16px}
.updated{font-size:.82rem;color:var(--muted-2)}

/* 404 */
.notfound{text-align:center;padding:90px 0 110px}
.notfound .code{font-size:clamp(4rem,12vw,7rem);font-weight:800;letter-spacing:-.05em;background:linear-gradient(135deg,var(--brand),#8b5cf6);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.notfound p{color:var(--muted);max-width:34em;margin:10px auto 26px}

/* footer */
.site-footer{background:#101223;color:#c8cbdd;margin-top:70px;padding:52px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.09)}
.site-footer .brand{color:#fff;margin-bottom:12px}
.site-footer p{color:#9297b3;font-size:.88rem;max-width:30em}
.footer-col h4{color:#fff;font-size:.82rem;letter-spacing:.07em;text-transform:uppercase;margin-bottom:12px}
.footer-col a{display:block;color:#a9aec8;font-size:.9rem;padding:4px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-top:22px;font-size:.8rem;color:#8a8fab}
.footer-bottom a{color:#a9aec8}

@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:520px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr}
  .quotes{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:18px}
  .auth-grid{grid-template-columns:1fr}
  .auth-aside{padding:34px}
  .contact-grid{grid-template-columns:1fr}
  .cta{flex-direction:column;align-items:flex-start;padding:34px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:10px 24px 18px;box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:11px 0;border-bottom:1px solid var(--line)}
  .nav a:last-child{border-bottom:0}
  .nav-toggle{display:block;margin-left:8px}
  .header-actions .btn-ghost{display:none}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:40px 0 30px}
  .section{padding:44px 0}
  .auth-card,.auth-aside{padding:28px 22px}
  .plan.is-featured{order:-1}
  .float-card{right:0;bottom:-20px}
  .footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}