:root{
  --bg: #0e1117;
  --panel: #141826;
  --text: #eef2ff;
  --muted: #b4bdd6;
  --muted2: #8e98b3;
  --line: rgba(255,255,255,.08);
  --brand: #4a8cff;
  --brand2: #2f6bff;
  --success-bg: rgba(74, 140, 255, 0.08);
}

*{ box-sizing:border-box; }

html,body{ height:100%; }

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(900px 500px at 20% 10%, rgba(74,140,255,.18), transparent 55%),
    radial-gradient(700px 400px at 85% 20%, rgba(120,80,255,.12), transparent 60%),
    var(--bg);
  color: var(--text);
}

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

a:hover{
  text-decoration: underline;
}

.top{
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.brand{
  font-weight: 800;
  letter-spacing: .2px;
  font-size: 18px;
}

.nav{
  display:flex;
  gap: 18px;
  align-items:center;
  color: var(--muted);
  font-size: 14px;
}

.nav-cta{
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,.02);
  text-decoration:none !important;
}

.wrap{
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.hero,
.steps,
.study-engine,
.faq{
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: 0 14px 40px rgba(0,0,0,.35);
}

.hero{
  margin-top: 14px;
  padding: 46px;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(20,24,38,.7);
  color: var(--muted);
  font-size: 13px;
}

h1{
  margin: 18px 0 12px;
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.05;
  letter-spacing: -.6px;
  max-width: 12ch;
}

.sub{
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
}

.actions{
  margin-top: 22px;
  display:flex;
  gap: 14px;
  align-items:center;
  flex-wrap: wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 14px 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, var(--brand), var(--brand2));
  color: white;
  font-weight: 800;
  border: 0;
  box-shadow: 0 10px 24px rgba(74,140,255,.25);
  text-decoration:none !important;
}

.btn:hover{
  filter: brightness(1.04);
}

.link{
  color: var(--muted);
  text-decoration:none !important;
  border-bottom: 1px solid rgba(255,255,255,.18);
  padding-bottom: 2px;
}

.transform-box{
  margin-top: 30px;
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: stretch;
}

.transform-card{
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
  background: rgba(14,17,23,.45);
}

.transform-card h3{
  margin: 10px 0 10px;
  font-size: 20px;
}

.transform-card p,
.transform-card li{
  color: var(--muted);
  line-height: 1.5;
}

.transform-card ul{
  margin: 0;
  padding-left: 18px;
}

.label{
  display:inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2px;
  background: rgba(255,255,255,.06);
  color: var(--muted);
}

.after{
  background: var(--success-bg);
}

.arrow{
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 34px;
  color: var(--brand);
  font-weight: 800;
}

.grid{
  margin-top: 28px;
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card,
.step{
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  background: rgba(14,17,23,.45);
}

.card h3,
.step h3{
  margin: 0 0 8px;
  font-size: 16px;
}

.card p,
.step p{
  margin: 0;
  color: var(--muted2);
  line-height: 1.45;
  font-size: 14px;
}

.steps{
  margin-top: 18px;
  padding: 28px;
}

.steps h2,
.study-engine h2,
.faq h2{
  margin: 0 0 16px;
  font-size: 24px;
}

.steps-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.step-num{
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 800;
  background: linear-gradient(180deg, var(--brand), var(--brand2));
  color: #fff;
  margin-bottom: 12px;
}

.study-engine{
  margin-top: 18px;
  padding: 28px;
}

.engine-sub{
  margin: 0;
  max-width: 64ch;
  color: var(--muted);
  line-height: 1.6;
}

.engine-points{
  margin-top: 18px;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}

.engine-points span{
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-size: 14px;
}

.faq{
  margin-top: 18px;
  padding: 26px;
}

details{
  border-top: 1px solid var(--line);
  padding: 12px 0;
}

details:first-of-type{
  border-top: 0;
}

summary{
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
}

details p{
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.foot{
  margin-top: 18px;
  padding: 18px 6px;
  color: var(--muted2);
  display:flex;
  justify-content:space-between;
  gap: 12px;
  font-size: 13px;
}

.foot-links{
  display:flex;
  gap: 14px;
}

@media (max-width: 900px){
  .hero,
  .steps,
  .study-engine,
  .faq{
    padding: 28px;
  }

  .grid,
  .steps-grid,
  .transform-box{
    grid-template-columns: 1fr;
  }

  .arrow{
    transform: rotate(90deg);
  }

  .nav a:not(.nav-cta){
    display:none;
  }
}