:root{
  --bg:#07111f;
  --bg2:#0b1728;
  --surface:#ffffff;
  --surface2:#f4f7fb;
  --text:#112033;
  --muted:#607086;
  --line:#dce4ee;
  --accent:#4dd3ff;
  --accent2:#7b8cff;
  --white:#f8fbff;
  --radius:22px;
  --shadow:0 18px 60px rgba(13,33,58,.12);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:var(--surface);
  line-height:1.65;
}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.container{width:min(1160px,calc(100% - 40px));margin:0 auto}
.narrow{max-width:860px}
.center{text-align:center}

.site-header{
  position:sticky;top:0;z-index:30;
  backdrop-filter:blur(14px);
  background:rgba(7,17,31,.88);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-wrap{height:74px;display:flex;align-items:center;justify-content:space-between}
.brand{
  font-family:Manrope,sans-serif;font-weight:800;font-size:1.25rem;
  letter-spacing:-.03em;color:white;
}
.brand span{color:var(--accent)}
.nav-links{display:flex;gap:26px;align-items:center;color:#d8e5f3;font-size:.94rem}
.nav-links a{transition:.2s}
.nav-links a:hover{color:white}
.nav-cta{
  padding:10px 16px;border:1px solid rgba(255,255,255,.2);
  border-radius:999px;
}
.menu-toggle{
  display:none;background:none;border:0;color:white;font-size:1.5rem;cursor:pointer;
}

.hero{
  color:white;
  background:
    radial-gradient(circle at 75% 25%, rgba(77,211,255,.16), transparent 26%),
    radial-gradient(circle at 85% 75%, rgba(123,140,255,.16), transparent 25%),
    linear-gradient(135deg,#07111f 0%,#0b1728 100%);
  padding:96px 0 92px;
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
.eyebrow,.section-kicker{
  font-size:.78rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
}
.eyebrow{color:#99b3cc;margin-bottom:18px}
.hero h1{
  font-family:Manrope,sans-serif;font-size:clamp(3.1rem,7vw,5.9rem);
  line-height:.98;letter-spacing:-.055em;margin:0 0 24px;
}
.hero h1 span{
  background:linear-gradient(90deg,var(--accent),#94a5ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-text{max-width:650px;font-size:1.14rem;color:#b9c9da;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 20px;border-radius:999px;font-weight:700;
  transition:transform .2s, box-shadow .2s, background .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:white;color:#08121f;box-shadow:0 10px 30px rgba(255,255,255,.13)}
.btn-secondary{border:1px solid #cfd8e4;color:inherit;background:transparent}
.hero .btn-secondary{border-color:rgba(255,255,255,.24);color:white}
.btn-light{background:white;color:#0b1728}
.hero-points{display:flex;gap:34px;margin-top:46px;color:#aec0d1}
.hero-points div{display:flex;flex-direction:column}
.hero-points strong{color:white;font-size:1.15rem}
.hero-points span{font-size:.82rem}

.hero-card{
  min-height:480px;position:relative;border-radius:34px;overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px),
    radial-gradient(circle at center,#142941 0%,#0a1524 62%);
  background-size:34px 34px,34px 34px,auto;
  box-shadow:0 50px 100px rgba(0,0,0,.35);
}
.planet{
  width:110px;height:110px;border-radius:50%;position:absolute;left:50%;top:43%;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle at 35% 30%,#c8f6ff,#4f8dff 45%,#172f60 70%);
  box-shadow:0 0 60px rgba(77,211,255,.38);
}
.orbit{
  position:absolute;border:1px solid rgba(163,214,255,.28);border-radius:50%;
  left:50%;top:43%;transform:translate(-50%,-50%) rotate(-12deg);
}
.orbit-one{width:310px;height:130px}
.orbit-two{width:390px;height:200px;transform:translate(-50%,-50%) rotate(22deg)}
.formula{
  position:absolute;color:#b9d8f6;font-family:Georgia,serif;font-size:1.05rem;
  padding:7px 10px;background:rgba(4,15,27,.6);border:1px solid rgba(255,255,255,.08);
  border-radius:10px;backdrop-filter:blur(8px);
}
.f1{left:10%;top:18%}.f2{right:10%;top:25%}.f3{left:12%;bottom:31%}.f4{right:10%;bottom:22%}
.hero-card-label{
  position:absolute;left:28px;right:28px;bottom:26px;
  padding:19px 21px;border-radius:18px;
  background:rgba(7,17,31,.74);backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.09);
}
.hero-card-label span{display:block;color:#82dfff;font-size:.75rem;font-weight:800;letter-spacing:.12em;margin-bottom:6px}
.hero-card-label strong{font-family:Manrope,sans-serif;font-size:1.25rem;line-height:1.35}

.section{padding:100px 0}
.section-alt{background:var(--surface2)}
.section-kicker{color:#5576a0;margin:0 0 11px}
h2,h3{font-family:Manrope,sans-serif;letter-spacing:-.035em}
h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.08;margin:0 0 20px}
h3{font-size:1.28rem;line-height:1.25;margin:0 0 10px}
.lead{font-size:1.08rem;color:var(--muted);max-width:780px;margin:0 auto}
.section-heading{
  display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:42px
}
.section-heading>p{max-width:460px;color:var(--muted);margin:0}

.cards{display:grid;gap:20px}
.cards.four{grid-template-columns:repeat(4,1fr)}
.cards.three{grid-template-columns:repeat(3,1fr)}
.course-card,.lesson-card{
  background:white;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:0 8px 30px rgba(20,44,74,.04);
}
.course-card{padding:28px;min-height:300px;display:flex;flex-direction:column}
.course-card p{color:var(--muted);font-size:.94rem}
.course-card a{margin-top:auto;font-weight:700;color:#316b9c}
.course-tag,.mini-tag{
  display:inline-block;align-self:flex-start;font-size:.72rem;font-weight:800;letter-spacing:.12em;
  color:#446786;background:#e9f4fb;border-radius:999px;padding:6px 9px;margin-bottom:18px;
}
.video-placeholder{
  height:205px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:13px;color:#dcecff;
  background:
    radial-gradient(circle at 25% 30%,rgba(77,211,255,.18),transparent 28%),
    linear-gradient(135deg,#0b1728,#19324d);
}
.video-placeholder span{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}
.play{
  display:grid;place-items:center;width:54px;height:54px;border-radius:50%;
  background:white;color:#0b1728;padding-left:3px;
}
.lesson-body{padding:24px}
.lesson-body p{color:var(--muted);font-size:.93rem;margin-bottom:0}
.mini-tag{margin-bottom:12px}
.section-action{margin-top:34px}

.resource-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.resource-item{
  display:grid;grid-template-columns:52px 1fr;gap:16px;padding:30px 10px;
  border-bottom:1px solid var(--line);
}
.resource-item:nth-child(odd){padding-right:42px;border-right:1px solid var(--line)}
.resource-item:nth-child(even){padding-left:42px}
.resource-item>span{font-family:Manrope;font-size:.85rem;color:#7790aa;font-weight:800}
.resource-item p{color:var(--muted);margin:0;font-size:.94rem}

.about-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:70px;align-items:center}
.portrait-placeholder{
  aspect-ratio:4/5;border-radius:28px;background:linear-gradient(145deg,#0b1728,#18324d);
  display:flex;flex-direction:column;align-items:center;justify-content:center;color:#8ba6bf;
  border:1px solid #263f58;
}
.portrait-initials{
  width:120px;height:120px;border-radius:50%;background:white;color:#0b1728;
  display:grid;place-items:center;font-family:Manrope;font-weight:800;font-size:3rem;margin-bottom:18px;
}
.about-copy>p{color:var(--muted)}
.about-highlights{display:grid;gap:12px;margin-top:28px}
.about-highlights div{display:flex;gap:16px;padding:14px 0;border-top:1px solid var(--line)}
.about-highlights strong{width:130px}
.about-highlights span{color:var(--muted)}

.contact-section{padding-top:20px}
.contact-box{
  border-radius:30px;padding:52px;
  display:flex;justify-content:space-between;align-items:center;gap:40px;
  color:white;background:linear-gradient(135deg,#0a1727,#183450);
}
.contact-box .section-kicker{color:#8fdcf6}
.contact-box p{max-width:660px;color:#c4d4e3}
.contact-actions{display:flex;flex-direction:column;align-items:flex-start;gap:15px;min-width:230px}
.text-link{font-size:.88rem;color:#c7daea}

footer{background:#07111f;color:#9fb2c4;padding:42px 0}
.footer-wrap{display:grid;grid-template-columns:1fr auto auto;gap:40px;align-items:center}
.brand-footer{display:inline-block}
.footer-wrap p{margin:8px 0 0;font-size:.85rem}
.footer-links{display:flex;gap:22px;font-size:.88rem}
.copyright{white-space:nowrap}

@media (max-width: 940px){
  .hero-grid,.about-grid{grid-template-columns:1fr}
  .hero-card{min-height:410px}
  .cards.four{grid-template-columns:1fr 1fr}
  .cards.three{grid-template-columns:1fr}
  .section-heading{display:block}
  .section-heading>p{margin-top:15px}
  .footer-wrap{grid-template-columns:1fr}
}
@media (max-width: 720px){
  .container{width:min(100% - 28px,1160px)}
  .menu-toggle{display:block}
  .nav-links{
    position:absolute;top:74px;left:0;right:0;background:#08121f;
    display:none;flex-direction:column;align-items:flex-start;padding:22px 24px 28px;
    border-top:1px solid rgba(255,255,255,.08)
  }
  .nav-links.open{display:flex}
  .hero{padding-top:68px}
  .hero h1{font-size:3.25rem}
  .hero-points{gap:18px;flex-wrap:wrap}
  .cards.four{grid-template-columns:1fr}
  .resource-grid{grid-template-columns:1fr}
  .resource-item:nth-child(odd),.resource-item:nth-child(even){
    padding:24px 0;border-right:0
  }
  .contact-box{padding:34px 26px;display:block}
  .contact-actions{margin-top:28px}
  .section{padding:78px 0}
}