/* ── RESET & BASE ─────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:       #06040f;
  --bg2:      #0b0918;
  --surface:  rgba(255,255,255,.035);
  --surface2: rgba(255,255,255,.06);
  --border:   rgba(255,255,255,.07);
  --border2:  rgba(124,58,237,.35);
  --violet:   #7c3aed;
  --violet2:  #9333ea;
  --lavender: #a78bfa;
  --lavender2:#c4b5fd;
  --cyan:     #22d3ee;
  --text:     #f0eeff;
  --muted:    #8b89a8;
  --muted2:   #5a5875;
  --radius:   16px;
  --radius-lg:24px;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  overflow-x:hidden;
  line-height:1.6;
}

/* ── ACCENT LINE ─────────────────────────────────────────────────────────── */
body::before{
  content:'';position:fixed;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,#7c3aed,#a855f7,#22d3ee,#7c3aed);
  background-size:300% 100%;
  animation:accentShift 6s linear infinite;
  z-index:200;
}
@keyframes accentShift{to{background-position:-300% 0}}

/* ── DOT GRID ────────────────────────────────────────────────────────────── */
.dot-grid{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(rgba(124,58,237,.12) 1px,transparent 1px);
  background-size:28px 28px;
}

/* ── NAV ─────────────────────────────────────────────────────────────────── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:0 40px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(6,4,15,.7);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:background .3s;
}
nav.scrolled{background:rgba(6,4,15,.92)}
.nav-logo{
  font-size:18px;font-weight:800;letter-spacing:-.4px;
  color:var(--text);text-decoration:none;display:flex;align-items:center;gap:6px;
}
.nav-logo .dot{
  width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--violet),var(--cyan));
  flex-shrink:0;
}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;
  text-decoration:none;color:var(--muted);transition:.18s;border:none;
  background:none;cursor:pointer;font-family:inherit;
}
.nav-link:hover{color:var(--text);background:var(--surface)}
.nav-cta{
  background:var(--violet);color:#fff!important;padding:9px 20px;
  border-radius:10px;font-weight:700;font-size:14px;
  box-shadow:0 0 24px rgba(124,58,237,.4);
  transition:.2s;
}
.nav-cta:hover{background:var(--violet2);box-shadow:0 0 32px rgba(124,58,237,.55);transform:translateY(-1px)}
/* Mobile nav */
.nav-burger{display:none;background:none;border:none;color:var(--text);cursor:pointer;padding:8px}
.nav-mobile{
  display:none;position:fixed;inset:64px 0 0;background:rgba(6,4,15,.98);
  backdrop-filter:blur(20px);z-index:99;padding:24px;flex-direction:column;gap:8px;
}
.nav-mobile.open{display:flex}
.nav-mobile .nav-link{font-size:18px;padding:14px 16px}

/* ── HERO ─────────────────────────────────────────────────────────────────── */
.hero{
  min-height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  text-align:center;padding:100px 24px 80px;
  position:relative;overflow:hidden;
}
.hero-orb{
  position:absolute;border-radius:50%;pointer-events:none;
  filter:blur(100px);opacity:.18;
}
.orb-1{
  width:700px;height:700px;
  background:radial-gradient(var(--violet),transparent 70%);
  top:-200px;left:50%;transform:translateX(-50%);
  animation:floatOrb 8s ease-in-out infinite;
}
.orb-2{
  width:500px;height:500px;
  background:radial-gradient(var(--cyan),transparent 70%);
  bottom:-100px;right:-150px;
  animation:floatOrb 10s ease-in-out infinite reverse;
}
.orb-3{
  width:400px;height:400px;
  background:radial-gradient(#9333ea,transparent 70%);
  top:30%;left:-100px;
  animation:floatOrb 12s ease-in-out infinite;
}
@keyframes floatOrb{
  0%,100%{transform:translateY(0) scale(1)}
  50%{transform:translateY(-30px) scale(1.05)}
}
/* Нейросеть-фон hero: над размытыми орбами, под контентом. Не перехватывает клики. */
.hero-neural{
  position:absolute;inset:0;width:100%;height:100%;
  z-index:0;pointer-events:none;
  opacity:.62;
  -webkit-mask-image:radial-gradient(130% 112% at 50% 40%,#000 60%,transparent 100%);
          mask-image:radial-gradient(130% 112% at 50% 40%,#000 60%,transparent 100%);
}
.hero-content{position:relative;z-index:1;max-width:860px}
.hero-eye{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid rgba(124,58,237,.4);
  background:rgba(124,58,237,.1);
  border-radius:100px;padding:6px 16px;
  font-size:13px;font-weight:500;color:var(--lavender2);
  margin-bottom:28px;letter-spacing:.02em;
}
.hero-eye::before{
  content:'';width:6px;height:6px;border-radius:50%;
  background:var(--lavender);
  box-shadow:0 0 8px var(--lavender);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:clamp(40px,7vw,80px);
  font-weight:900;line-height:1.06;letter-spacing:-3px;
  margin-bottom:22px;
}
.hero h1 .grad{
  background:linear-gradient(135deg,var(--lavender),var(--cyan));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-sub{
  font-size:clamp(16px,2.2vw,20px);color:var(--muted);
  line-height:1.65;max-width:580px;margin:0 auto 40px;
}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-main{
  padding:15px 32px;border-radius:12px;font-size:16px;font-weight:700;
  font-family:inherit;text-decoration:none;border:none;cursor:pointer;
  transition:.2s;display:inline-flex;align-items:center;gap:8px;
}
.btn-primary{
  background:linear-gradient(135deg,var(--violet),var(--violet2));
  color:#fff;
  box-shadow:0 8px 32px rgba(124,58,237,.45),inset 0 1px 0 rgba(255,255,255,.15);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(124,58,237,.6),inset 0 1px 0 rgba(255,255,255,.15)}
.btn-ghost{
  background:var(--surface);color:var(--text);
  border:1px solid var(--border2);
}
.btn-ghost:hover{background:var(--surface2);transform:translateY(-2px)}
.hero-stats{
  display:flex;gap:0;margin-top:64px;
  border:1px solid var(--border);border-radius:var(--radius-lg);
  background:var(--surface);backdrop-filter:blur(12px);
  overflow:hidden;
}
.hstat{
  flex:1;padding:20px 28px;text-align:center;
  border-right:1px solid var(--border);
  position:relative;
}
.hstat:last-child{border-right:none}
.hstat-val{
  font-size:28px;font-weight:800;
  background:linear-gradient(135deg,#fff,var(--lavender2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hstat-lbl{font-size:12px;color:var(--muted);margin-top:3px;letter-spacing:.03em}

/* ── SECTION COMMON ──────────────────────────────────────────────────────── */
section{padding:100px 24px;position:relative}
.container{max-width:1160px;margin:0 auto}
.s-eye{
  font-size:11px;font-weight:700;text-transform:uppercase;
  letter-spacing:.14em;color:var(--lavender);margin-bottom:14px;
}
.s-title{
  font-size:clamp(30px,4.5vw,50px);font-weight:800;
  letter-spacing:-1.5px;line-height:1.12;margin-bottom:18px;
}
.s-sub{font-size:17px;color:var(--muted);line-height:1.65;max-width:520px}

/* ── FEATURES ────────────────────────────────────────────────────────────── */
.features-bg{background:var(--bg2)}
.features-head{margin-bottom:60px}
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.feat{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  position:relative;overflow:hidden;
  transition:.25s;
}
.feat::before{
  content:'';position:absolute;inset:0;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(124,58,237,.08),transparent 60%);
  opacity:0;transition:.3s;
}
.feat:hover{border-color:var(--border2);transform:translateY(-4px)}
.feat:hover::before{opacity:1}
.feat-icon{
  width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,rgba(124,58,237,.25),rgba(34,211,238,.1));
  border:1px solid rgba(124,58,237,.25);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:18px;
}
.feat h3{font-size:16px;font-weight:700;margin-bottom:8px;letter-spacing:-.2px}
.feat p{font-size:14px;color:var(--muted);line-height:1.65}
/* gradient top accent line */
.feat::after{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(124,58,237,.5),transparent);
  opacity:0;transition:.3s;
}
.feat:hover::after{opacity:1}

/* ── COURSES ─────────────────────────────────────────────────────────────── */
.courses-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  flex-wrap:wrap;gap:20px;margin-bottom:48px;
}
.courses-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.course-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;text-decoration:none;color:var(--text);
  transition:.3s cubic-bezier(.4,0,.2,1);
  position:relative;
}
.course-card:hover{
  border-color:rgba(124,58,237,.45);
  transform:translateY(-6px);
  box-shadow:0 20px 60px rgba(0,0,0,.5),0 0 0 1px rgba(124,58,237,.2);
}
.cc-img{
  background-color:#0c1018;
  position:relative;flex-shrink:0;line-height:0;overflow:hidden;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;min-height:120px;
}
.cc-img-el{width:100%;height:auto;display:block}
.cc-img.no-cover{min-height:180px}
/* Gradient placeholder when no cover */
.cc-img.no-cover{
  background:linear-gradient(135deg,var(--grad-a,#4f46e5),var(--grad-b,#7c3aed));
}
.cc-img::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:30%;
  background:linear-gradient(transparent,rgba(6,4,15,.35));
}
.cc-img-overlay-title{
  position:absolute;bottom:0;left:0;right:0;
  padding:16px;z-index:1;
  font-size:20px;font-weight:800;letter-spacing:-.5px;
  line-height:1.2;
  display:none; /* shown only when course has cover and we want title overlaid */
}
.cc-price-tag{
  position:absolute;
  top:12px;
  right:12px;
  z-index:2;
  padding: 11px 12px;
  border-radius:100px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  backdrop-filter:blur(8px);
}
.cc-price-tag.free{
  background:rgba(34,197,94,.2);color:#86efac;
  border:1px solid rgba(34,197,94,.3);
}
.cc-price-tag.paid{
  background:rgba(124,58,237,.25);color:var(--lavender2);
  border:1px solid rgba(124,58,237,.4);
}
.cc-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:10px}
.cc-title{font-size:17px;font-weight:700;line-height:1.3;letter-spacing:-.3px}
.cc-desc{
  font-size:13px;color:var(--muted);line-height:1.6;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.cc-footer{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:4px;
}
.cc-tags{display:flex;gap:6px;flex-wrap:wrap}
.cc-tag{
  background:rgba(255,255,255,.06);border:1px solid var(--border);
  padding:3px 10px;border-radius:8px;font-size:11px;color:var(--muted);
}
.cc-tag.highlight{
  background:rgba(124,58,237,.12);border-color:rgba(124,58,237,.25);
  color:var(--lavender);
}
/* Явная кнопка-призыв вместо малозаметной стрелки */
.cc-cta{
  margin-top:14px;
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 16px;border-radius:10px;
  font-size:14px;font-weight:700;color:#fff;letter-spacing:.2px;
  background:linear-gradient(135deg,#7c3aed,#a855f7);
  border:1px solid rgba(124,58,237,.5);
  box-shadow:0 6px 18px -8px rgba(124,58,237,.9);
  transition:transform .2s,box-shadow .2s,filter .2s;
}
.cc-cta-arrow{
  font-size:15px;line-height:1;
  transition:transform .2s;
}
.course-card:hover .cc-cta{
  filter:brightness(1.08);
  box-shadow:0 10px 26px -8px rgba(124,58,237,1);
}
.course-card:hover .cc-cta-arrow{transform:translateX(4px)}
.courses-empty{color:var(--muted);text-align:center;padding:60px;grid-column:1/-1;font-size:15px}

/* ── HOW IT WORKS ────────────────────────────────────────────────────────── */
.how-bg{background:var(--bg2)}
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;margin-top:60px;
  border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;
}
.step{
  padding:32px 24px;position:relative;
  border-right:1px solid var(--border);
}
.step:last-child{border-right:none}
.step-num{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--violet),var(--violet2));
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;color:#fff;
  margin-bottom:20px;
  box-shadow:0 4px 16px rgba(124,58,237,.4);
}
.step h3{font-size:15px;font-weight:700;margin-bottom:8px;letter-spacing:-.2px}
.step p{font-size:13px;color:var(--muted);line-height:1.65}

/* ── CTA BLOCK ───────────────────────────────────────────────────────────── */
.cta-wrap{
  background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(124,58,237,.2),transparent),
             linear-gradient(180deg,rgba(124,58,237,.08) 0%,transparent 100%);
  border:1px solid rgba(124,58,237,.2);
  border-radius:28px;padding:80px 48px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-wrap::before{
  content:'';position:absolute;inset:0;
  background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239333ea' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.cta-wrap h2{
  font-size:clamp(32px,5vw,54px);font-weight:900;
  letter-spacing:-2px;line-height:1.08;margin-bottom:16px;
  position:relative;
}
.cta-wrap p{
  font-size:18px;color:var(--muted);margin-bottom:36px;position:relative;
}
.cta-wrap .btn-main{position:relative}

/* ── FOOTER ──────────────────────────────────────────────────────────────── */
footer{
  border-top:1px solid var(--border);
  padding:36px 40px;background:var(--bg2);
}
.footer-inner{
  max-width:1160px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;
}
.footer-left{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.footer-copy{font-size:13px;color:var(--muted2)}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{font-size:13px;color:var(--muted);text-decoration:none;transition:.15s}
.footer-links a:hover{color:var(--text)}

/* ── SCROLL REVEAL ───────────────────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(28px);transition:.55s cubic-bezier(.4,0,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.08s}
.reveal-delay-2{transition-delay:.16s}
.reveal-delay-3{transition-delay:.24s}
.reveal-delay-4{transition-delay:.32s}
.reveal-delay-5{transition-delay:.40s}
.reveal-delay-6{transition-delay:.48s}

/* ── SKELETON ────────────────────────────────────────────────────────────── */
.skel{
  background:linear-gradient(90deg,var(--surface) 25%,var(--surface2) 50%,var(--surface) 75%);
  background-size:200% 100%;
  animation:shimmer 1.4s ease-in-out infinite;
  border-radius:var(--radius-lg);border:1px solid var(--border);
}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ── RESPONSIVE ──────────────────────────────────────────────────────────── */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .courses-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(2){border-right:none}
  .step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--border)}
}
@media(max-width:768px){
  nav{padding:0 20px}
  .nav-links{display:none}
  .nav-burger{display:block}
  .hero{padding:90px 20px 60px}
  .hero h1{letter-spacing:-2px}
  .hero-stats{flex-direction:column;border-radius:var(--radius)}
  .hstat{border-right:none;border-bottom:1px solid var(--border);padding:16px 24px}
  .hstat:last-child{border-bottom:none}
  section{padding:64px 20px}
  .features-grid{grid-template-columns:1fr}
  .courses-grid{grid-template-columns:1fr}
  .courses-head{flex-direction:column;align-items:flex-start}
  .steps{grid-template-columns:1fr;border-radius:var(--radius)}
  .step{border-right:none;border-bottom:1px solid var(--border)}
  .step:last-child{border-bottom:none}
  .cta-wrap{padding:48px 24px;border-radius:var(--radius-lg)}
  footer{padding:28px 20px}
  .footer-inner{flex-direction:column;align-items:flex-start;gap:12px}
}
@media(max-width:480px){
  .hero-actions{flex-direction:column;align-items:center}
  .btn-main{width:100%;max-width:340px;justify-content:center}
}

/* ── PREMIUM TOUCHES & EXTRA RESPONSIVE ─────────────────────────────────── */
.feat-icon i{color:var(--lavender2);font-size:20px}
.cc-price-tag.free i,.cc-price-tag.paid i{margin-right:3px}
@media(max-width:768px){
  section{padding:56px 18px}
  .hero{padding:96px 18px 56px}
  .hero h1{font-size:clamp(32px,9vw,46px);letter-spacing:-1.5px}
  .hero-sub{font-size:15px}
  .hero-stats{margin-top:40px}
  .s-title br{display:none}
  .courses-head h2{font-size:clamp(26px,7vw,34px)}
}
@media(max-width:430px){
  nav{padding:0 16px;height:58px}
  .nav-logo{font-size:16px}
  .hero{padding:84px 16px 48px}
  .hero-eye{font-size:12px;padding:5px 13px;margin-bottom:20px}
  .hstat{padding:14px 18px}
  .hstat-val{font-size:24px}
  .cc-body{padding:16px}
  .cc-title{font-size:16px}
  .cta-wrap{padding:40px 20px}
  footer{padding:24px 16px}
}
/* Плавный тач-скролл и отключение горизонтального переполнения на узких экранах */
@media(max-width:768px){ html,body{max-width:100%;overflow-x:hidden} }