:root{
  --indigo:#2E1A6B;
  --violet:#5B3FA0;
  --amethyst:#8B6FD1;
  --midnight:#171340;
  --mist:#F3F1F8;
  --white:#FFFFFF;
  --graphite:#5A5670;
  --success:#3FA76B;
  --error:#D65A5A;
  --max-w:1160px;
}

*{box-sizing:border-box; margin:0; padding:0;}

html{scroll-behavior:smooth;}

body{
  font-family:'Inter', sans-serif;
  color:var(--midnight);
  background:var(--white);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{
  font-family:'Golos Text', sans-serif;
  color:var(--midnight);
  line-height:1.15;
  font-weight:700;
}

.formula{
  font-family:'JetBrains Mono', monospace;
}

.wrap{
  max-width:var(--max-w);
  margin:0 auto;
  padding:0 32px;
}

a{color:inherit; text-decoration:none;}

img{max-width:100%; display:block;}

button{font-family:inherit; cursor:pointer; border:none;}

/* ---------- Header ---------- */

header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,0.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid #E9E5F2;
}

.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 32px;
  max-width:var(--max-w);
  margin:0 auto;
}

.brand{display:flex; align-items:center; gap:10px;}
.brand-mark{width:30px; height:30px;}
.brand-name{
  font-family:'Golos Text', sans-serif;
  font-weight:800;
  font-size:19px;
  letter-spacing:0.5px;
  color:var(--midnight);
}

.nav-links{display:flex; gap:32px; font-size:15px; color:var(--graphite);}
.nav-links a:hover{color:var(--violet);}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 24px;
  border-radius:10px;
  font-weight:600;
  font-size:15px;
  transition:transform .15s ease, box-shadow .15s ease;
}
.btn-primary{
  background:var(--violet);
  color:var(--white);
}
.btn-primary:hover{
  box-shadow:0 8px 20px rgba(91,63,160,0.28);
  transform:translateY(-1px);
}
.btn-ghost{
  color:var(--violet);
  border:1.5px solid var(--violet);
  background:transparent;
  padding:10.5px 22px;
}
.btn-ghost:hover{background:rgba(91,63,160,0.06);}

@media (max-width:820px){
  .nav-links{display:none;}
}

/* ---------- Hero ---------- */

.hero{
  position:relative;
  padding:88px 0 100px;
  overflow:hidden;
  background:var(--mist);
}

.hero-motif{
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:0.5;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:1;
}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr; text-align:center;}
  .hero-visual{order:-1; margin:0 auto 12px;}
}

.eyebrow-none{display:none;} /* explicit: no tracked-out label chrome */

.hero h1{
  font-size:clamp(34px, 4.6vw, 54px);
  max-width:640px;
}

.hero p.lead{
  margin-top:20px;
  font-size:18px;
  color:var(--graphite);
  max-width:540px;
}

@media (max-width:900px){
  .hero p.lead{margin-left:auto; margin-right:auto;}
}

.hero-cta{
  display:flex; gap:14px; margin-top:32px; flex-wrap:wrap;
}

@media (max-width:900px){
  .hero-cta{justify-content:center;}
}

.hero-note{
  margin-top:18px;
  font-size:14px;
  color:var(--graphite);
}

/* phone mockup */

.phone{
  width:100%;
  max-width:340px;
  margin:0 auto;
  background:var(--midnight);
  border-radius:34px;
  padding:12px;
  box-shadow:0 30px 60px -20px rgba(23,19,64,0.35);
}

.phone-screen{
  background:var(--white);
  border-radius:24px;
  overflow:hidden;
  min-height:560px;
  display:flex;
  flex-direction:column;
}

.phone-topbar{
  background:linear-gradient(135deg, var(--indigo), var(--violet));
  color:var(--white);
  padding:16px 18px 14px;
}

.phone-topbar .topic{
  font-size:12.5px;
  opacity:0.8;
}

.phone-topbar .step{
  font-family:'Golos Text', sans-serif;
  font-weight:700;
  font-size:17px;
  margin-top:4px;
}

.progress-track{
  height:5px;
  background:rgba(255,255,255,0.25);
  border-radius:3px;
  margin-top:12px;
  overflow:hidden;
}
.progress-fill{
  width:58%;
  height:100%;
  background:var(--white);
  border-radius:3px;
}

.phone-body{
  padding:20px 18px 22px;
  flex:1;
  display:flex;
  flex-direction:column;
  gap:16px;
}

.phone-body p{
  font-size:14px;
  color:var(--midnight);
}

.formula-card{
  background:var(--mist);
  border-radius:12px;
  padding:14px 16px;
  text-align:center;
}
.formula-card .formula{
  font-size:19px;
  color:var(--violet);
  font-weight:500;
}
.formula-card .caption{
  font-size:12px;
  color:var(--graphite);
  margin-top:6px;
}

.mini-test{
  border:1px solid #E9E5F2;
  border-radius:12px;
  padding:14px 16px;
}
.mini-test .q{
  font-size:13.5px;
  font-weight:600;
  margin-bottom:10px;
}
.option{
  display:flex; align-items:center; gap:10px;
  font-size:13.5px;
  padding:9px 10px;
  border-radius:8px;
  border:1px solid #E9E5F2;
  margin-bottom:7px;
  color:var(--midnight);
}
.option .dot{
  width:16px; height:16px;
  border-radius:50%;
  border:1.5px solid #C9C3DC;
  flex-shrink:0;
}
.option.correct{
  border-color:var(--success);
  background:rgba(63,167,107,0.08);
}
.option.correct .dot{
  border-color:var(--success);
  background:var(--success);
}

.phone-footer{
  margin-top:auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-top:6px;
}
.phone-footer .status{
  font-size:12px;
  color:var(--success);
  font-weight:600;
}
.phone-footer .next{
  background:var(--violet);
  color:var(--white);
  font-size:13px;
  font-weight:600;
  padding:9px 16px;
  border-radius:8px;
}

/* ---------- Positioning strip ---------- */

.positioning{
  padding:64px 0;
}
.positioning .wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
@media (max-width:820px){
  .positioning .wrap{grid-template-columns:1fr;}
}
.positioning h2{
  font-size:clamp(26px,3vw,32px);
  max-width:420px;
}
.positioning .col p{
  color:var(--graphite);
  font-size:16px;
}
.positioning .col p + p{margin-top:14px;}

/* ---------- How it works (real stepper) ---------- */

.flow{
  background:var(--indigo);
  padding:80px 0;
  color:var(--white);
}
.flow h2{
  color:var(--white);
  font-size:clamp(26px,3vw,34px);
  max-width:560px;
}
.flow .lead{
  color:rgba(255,255,255,0.72);
  font-size:16px;
  max-width:520px;
  margin-top:14px;
}

.stepper{
  margin-top:52px;
  display:grid;
  grid-template-columns:repeat(5, 1fr);
  gap:0;
  position:relative;
}
@media (max-width:900px){
  .stepper{grid-template-columns:1fr; gap:28px;}
}

.step-item{
  position:relative;
  padding-right:24px;
}
.step-item:not(:last-child)::after{
  content:'';
  position:absolute;
  top:19px; right:0;
  width:24px; height:1px;
  background:rgba(255,255,255,0.25);
}
@media (max-width:900px){
  .step-item:not(:last-child)::after{display:none;}
}

.step-num{
  width:38px; height:38px;
  border-radius:50%;
  border:1.5px solid rgba(255,255,255,0.5);
  display:flex; align-items:center; justify-content:center;
  font-family:'Golos Text', sans-serif;
  font-weight:700;
  font-size:15px;
  margin-bottom:16px;
}
.step-item h3{
  color:var(--white);
  font-size:16px;
  margin-bottom:8px;
}
.step-item p{
  color:rgba(255,255,255,0.65);
  font-size:14px;
}

.webinar-note{
  margin-top:36px;
  display:flex;
  align-items:center;
  gap:16px;
  padding:20px 24px;
  border:1px solid rgba(255,255,255,0.22);
  border-radius:14px;
  flex-wrap:wrap;
}
.webinar-note .badge{
  background:var(--amethyst);
  color:var(--midnight);
  font-family:'Golos Text', sans-serif;
  font-weight:700;
  font-size:13px;
  padding:6px 12px;
  border-radius:8px;
  flex-shrink:0;
}
.webinar-note p{
  color:rgba(255,255,255,0.85);
  font-size:14.5px;
  margin:0;
  flex:1;
  min-width:220px;
}

/* ---------- Features ---------- */

.features{
  padding:88px 0;
}
.features > .wrap > h2{
  font-size:clamp(26px,3vw,34px);
  max-width:520px;
}
.features > .wrap > p.lead{
  color:var(--graphite);
  font-size:16px;
  max-width:520px;
  margin-top:14px;
}

.feature-grid{
  margin-top:52px;
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:24px;
}
@media (max-width:900px){
  .feature-grid{grid-template-columns:1fr;}
}

.feature-main{
  background:var(--mist);
  border-radius:20px;
  padding:40px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  align-items:center;
}
@media (max-width:700px){
  .feature-main{grid-template-columns:1fr; padding:28px;}
}

.feature-main h3{
  font-size:22px;
  margin-bottom:12px;
}
.feature-main p{
  color:var(--graphite);
  font-size:15px;
}

.snap-demo{
  background:var(--white);
  border-radius:14px;
  padding:18px;
  box-shadow:0 20px 40px -24px rgba(23,19,64,0.3);
}
.snap-demo .row{
  display:flex; align-items:center; gap:10px;
  font-size:13px;
  color:var(--graphite);
  margin-bottom:10px;
}
.snap-demo .photo-block{
  height:110px;
  border-radius:10px;
  background:repeating-linear-gradient(135deg, #EDE9F6, #EDE9F6 8px, #E4DEF3 8px, #E4DEF3 16px);
  margin-bottom:12px;
  display:flex; align-items:center; justify-content:center;
  font-size:12px;
  color:var(--graphite);
}
.ai-message{
  background:var(--white);
  border:1.5px solid var(--success);
  border-radius:12px;
  border-top-left-radius:4px;
  padding:12px 14px;
  font-size:13.5px;
  font-weight:600;
  color:var(--success);
  width:fit-content;
}

.side-features{
  display:flex;
  flex-direction:column;
  gap:24px;
}

.feature-small{
  border:1px solid #E9E5F2;
  border-radius:16px;
  padding:26px;
  flex:1;
}
.feature-small h3{
  font-size:17px;
  margin-bottom:8px;
}
.feature-small p{
  color:var(--graphite);
  font-size:14.5px;
}
.screenshot-placeholder{
  margin-top:16px;
  height:100px;
  border-radius:10px;
  border:1.5px dashed #C9C3DC;
  background:var(--mist);
  display:flex; align-items:center; justify-content:center;
  font-size:12px;
  color:var(--graphite);
}

/* ---------- For whom ---------- */

.audience{
  padding:56px 0 88px;
}
.audience .band{
  background:var(--white);
  border:1px solid #E9E5F2;
  border-radius:20px;
  padding:36px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.audience h3{
  font-size:20px;
  max-width:420px;
}
.grades{
  display:flex; gap:10px; flex-wrap:wrap;
}
.grade{
  width:44px; height:44px;
  border-radius:10px;
  background:var(--mist);
  color:var(--violet);
  display:flex; align-items:center; justify-content:center;
  font-family:'Golos Text', sans-serif;
  font-weight:700;
  font-size:15px;
}

/* ---------- Final CTA ---------- */

.cta-final{
  position:relative;
  padding:96px 0;
  background:var(--violet);
  overflow:hidden;
  text-align:center;
}
.cta-final h2{
  color:var(--white);
  font-size:clamp(28px,4vw,40px);
  max-width:600px;
  margin:0 auto;
}
.cta-final p{
  color:rgba(255,255,255,0.78);
  font-size:16px;
  margin:16px auto 0;
  max-width:440px;
}
.cta-final .hero-cta{
  justify-content:center;
  margin-top:32px;
}
.cta-final .btn-primary{
  background:var(--white);
  color:var(--violet);
}
.cta-final .btn-ghost{
  color:var(--white);
  border-color:rgba(255,255,255,0.6);
}
.cta-final .btn-ghost:hover{background:rgba(255,255,255,0.1);}

/* ---------- Footer ---------- */

footer{
  padding:40px 0;
  border-top:1px solid #E9E5F2;
}
.footer-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
}
.footer-row .brand-name{font-size:16px;}
.footer-links{
  display:flex; gap:24px;
  font-size:14px;
  color:var(--graphite);
}
.footer-links a:hover{color:var(--violet);}

/* ---------- Motion: one orchestrated hero entrance ---------- */

@media (prefers-reduced-motion: no-preference){
  .reveal{
    opacity:0;
    transform:translateY(14px);
    animation:reveal-up .7s cubic-bezier(.2,.7,.3,1) forwards;
  }
  .reveal-delay-1{animation-delay:.12s;}
  .reveal-delay-2{animation-delay:.24s;}
  @keyframes reveal-up{
    to{opacity:1; transform:translateY(0);}
  }
}

:focus-visible{
  outline:2.5px solid var(--violet);
  outline-offset:2px;
}