@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root{
  --purple:#66229f;
  --purple-dark:#431169;
  --purple-soft:#f2e9f8;
  --yellow:#ffd900;
  --yellow-soft:#fff7c2;
  --white:#fff;
  --ink:#17131c;
  --muted:#6f6875;
  --line:#e9e4ec;
  --surface:#faf8fb;
  --radius:24px;
  --shadow:0 20px 60px rgba(48,18,69,.10);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Manrope",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
img,svg{max-width:100%}
.container{width:min(1180px,calc(100% - 32px));margin-inline:auto}
.page-progress{position:fixed;z-index:1000;top:0;left:0;height:3px;width:0;background:var(--yellow)}

.site-header{
  position:fixed;z-index:100;top:0;left:0;right:0;
  transition:.3s ease;
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);
  box-shadow:0 1px 0 var(--line);
}
.header-inner{
  min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:700}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;color:var(--purple);
  background:var(--purple-soft);border-radius:12px;flex:0 0 auto;
}
.brand-mark svg{width:27px;height:27px}
.brand-text{font-size:18px;letter-spacing:-.4px}
.brand-text b{color:var(--purple)}
.desktop-nav{display:none;align-items:center;gap:28px;font-size:14px;font-weight:600}
.desktop-nav a{position:relative;color:#4b4550;transition:.2s}
.desktop-nav a:hover,.desktop-nav .nav-active{color:var(--purple)}
.desktop-nav .nav-active:after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;background:var(--purple)
}
.header-cta{display:none}
.menu-btn{border:0;background:none;padding:8px;display:grid;gap:4px;cursor:pointer}
.menu-btn span{display:block;width:24px;height:2px;background:var(--ink);border-radius:3px;transition:.25s}
.menu-btn.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-menu{
  display:grid;gap:6px;max-height:0;overflow:hidden;background:#fff;
  transition:max-height .35s ease;padding:0 16px;
}
.mobile-menu.open{max-height:360px;padding:10px 16px 22px;border-top:1px solid var(--line)}
.mobile-menu>a:not(.btn){padding:12px 8px;font-weight:600}
.mobile-menu .btn{margin-top:8px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:44px;padding:0 18px;border-radius:14px;font-size:14px;font-weight:700;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--purple);color:#fff;box-shadow:0 10px 26px rgba(102,34,159,.22)}
.btn-primary:hover{background:var(--purple-dark)}
.btn-secondary{background:#fff;border:1px solid var(--line)}
.btn-dark{background:var(--ink);color:#fff}
.btn-lg{min-height:54px;padding:0 24px;border-radius:16px}

.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 8% 25%,rgba(255,217,0,.23),transparent 22%),
    radial-gradient(circle at 88% 28%,rgba(102,34,159,.14),transparent 27%),
    linear-gradient(180deg,#fbf8fd 0,#fff 100%);
  padding:128px 0 44px;
}
.hero-grid-pattern{
  position:absolute;inset:0;opacity:.22;pointer-events:none;
  background-image:linear-gradient(rgba(102,34,159,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(102,34,159,.08) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:linear-gradient(to bottom,#000 0,transparent 85%);
}
.hero-orb{position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none}
.hero-orb-a{width:180px;height:180px;background:rgba(255,217,0,.17);right:-70px;top:120px}
.hero-orb-b{width:120px;height:120px;border:30px solid rgba(102,34,159,.08);left:-55px;top:300px}
.hero-layout{position:relative;display:grid;gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;padding:7px 11px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:11px;font-weight:800;
  text-transform:uppercase;letter-spacing:.7px;
}
.eyebrow-dot{width:8px;height:8px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 5px rgba(255,217,0,.18)}
.hero h1{
  margin:20px 0 18px;font-size:clamp(42px,9vw,76px);line-height:.98;letter-spacing:-3px;max-width:760px;
}
.hero h1 span{display:block;color:var(--purple)}
.hero-lead{margin:0;color:var(--muted);font-size:16px;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero-trust{display:flex;align-items:center;gap:12px;margin-top:26px}
.trust-avatars{display:flex}
.trust-avatars span{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:var(--purple);color:#fff;border:3px solid #fff;font-size:13px;font-weight:700;margin-left:-8px
}
.trust-avatars span:first-child{margin-left:0}
.hero-trust p{margin:0;font-size:12px;color:var(--muted);line-height:1.5}
.hero-trust strong{color:var(--ink)}

.hero-visual{position:relative;max-width:560px;margin-inline:auto;width:100%}
.visual-card{
  position:relative;background:#fff;border:1px solid rgba(102,34,159,.13);border-radius:28px;
  padding:18px;box-shadow:var(--shadow);transform:rotate(1.2deg);
}
.visual-topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.visual-topbar strong{display:block;font-size:15px}
.mini-label{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.8px;font-weight:800;color:var(--muted);margin-bottom:3px}
.level-pill{background:var(--purple-soft);color:var(--purple);padding:7px 10px;border-radius:999px;font-size:10px;font-weight:800}
.equation-stage{
  position:relative;min-height:255px;margin:16px 0;background:linear-gradient(135deg,#f9f6fb,#f4edf8);
  border-radius:20px;overflow:hidden;padding:20px;
}
.formula{font-family:Georgia,serif;color:var(--purple-dark)}
.formula-main{font-size:34px;font-style:italic}
.formula-note{font-size:19px;margin-top:4px;opacity:.7}
.mini-graph{position:absolute;left:18px;right:18px;bottom:10px;width:calc(100% - 36px);height:150px}
.mini-graph line{stroke:#b9a6c7;stroke-width:1.4}
.mini-graph path{fill:none;stroke:var(--purple);stroke-width:4;stroke-linecap:round}
.mini-graph circle{fill:var(--yellow);stroke:var(--purple);stroke-width:2}
.progress-label{display:flex;justify-content:space-between;font-size:11px;margin-bottom:6px}
.progress-track{height:7px;background:#eee8f2;border-radius:999px;overflow:hidden}
.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--purple),#9c4fd4);border-radius:999px}
.visual-actions{display:flex;gap:6px;margin-top:14px}
.resource-chip{font-size:10px;font-weight:700;padding:6px 9px;border:1px solid var(--line);border-radius:999px;background:#fff}
.floating-card{
  position:absolute;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);
  border-radius:15px;padding:10px 12px;box-shadow:0 15px 40px rgba(43,23,55,.13)
}
.floating-card-a{left:-10px;bottom:70px}
.floating-card-b{right:-8px;top:70px}
.float-icon{width:30px;height:30px;border-radius:10px;background:var(--purple-soft);color:var(--purple);display:grid;place-items:center;font-weight:900}
.float-icon.yellow{background:var(--yellow-soft);color:#a98400}
.floating-card strong{display:block;font-size:10px}
.floating-card small{display:block;font-size:9px;color:var(--muted)}

.stats-strip{
  position:relative;margin-top:56px;padding:20px 0 0;border-top:1px solid rgba(102,34,159,.12);
  display:grid;grid-template-columns:1fr 1fr;gap:22px
}
.stats-strip div{display:flex;flex-direction:column}
.stats-strip strong{font-size:22px;letter-spacing:-.7px}
.stats-strip span{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-weight:700}

.section{padding:74px 0}
.section-light{background:var(--surface)}
.section-heading{display:flex;flex-direction:column;gap:14px;margin-bottom:30px}
.section-heading h2,.method-copy h2,.teacher-copy h2,.cta-card h2{margin:4px 0 0;font-size:clamp(31px,6vw,50px);line-height:1.08;letter-spacing:-1.8px}
.section-heading p{margin:0;color:var(--muted);max-width:520px}
.section-kicker{display:block;color:var(--purple);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:1.2px}
.level-grid{display:grid;gap:14px}
.level-card{
  position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;
  min-height:260px;transition:.3s ease;
}
.level-card:hover{transform:translateY(-5px);border-color:rgba(102,34,159,.35);box-shadow:0 18px 50px rgba(57,29,73,.09)}
.level-icon{
  position:absolute;right:-5px;bottom:-25px;font-size:110px;font-weight:800;line-height:1;color:rgba(102,34,159,.055);letter-spacing:-10px
}
.level-card-top{display:flex;justify-content:space-between;align-items:center}
.level-tag{font-size:10px;font-weight:800;color:var(--purple);background:var(--purple-soft);padding:6px 9px;border-radius:999px;text-transform:uppercase}
.arrow-circle{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;transition:.2s}
.level-card:hover .arrow-circle{background:var(--purple);color:#fff;border-color:var(--purple)}
.level-card h3{position:relative;margin:50px 0 8px;font-size:27px;letter-spacing:-.8px}
.level-card p{position:relative;margin:0;color:var(--muted);font-size:13px;max-width:350px}
.card-meta{position:absolute;left:20px;bottom:20px;display:flex;gap:7px;font-size:9px;font-weight:700;color:#8b838f;text-transform:uppercase;letter-spacing:.4px}

.method-section{background:#fff}
.method-layout{display:grid;gap:38px}
.method-copy p{color:var(--muted);max-width:500px}
.text-link{display:inline-flex;align-items:center;gap:9px;color:var(--purple);font-weight:800;font-size:13px;margin-top:8px}
.method-steps{display:grid;gap:10px}
.method-step{
  display:grid;grid-template-columns:50px 1fr;gap:12px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;
}
.step-number{color:var(--purple);font-weight:800;font-size:12px}
.method-step h3{margin:0 0 5px;font-size:17px}
.method-step p{margin:0;color:var(--muted);font-size:12px}

.teacher-section{padding-top:20px}
.teacher-card{
  background:var(--purple);color:#fff;border-radius:30px;padding:24px;display:grid;gap:28px;
  overflow:hidden;position:relative;
}
.teacher-card:after{
  content:"π";position:absolute;right:-15px;bottom:-95px;font-size:260px;line-height:1;font-weight:800;color:rgba(255,255,255,.04)
}
.teacher-visual{position:relative;min-height:260px;border-radius:22px;background:linear-gradient(145deg,#7f33b5,#4a176e);display:grid;place-items:center}
.teacher-monogram{font-size:82px;font-weight:800;color:rgba(255,255,255,.9);letter-spacing:-7px}
.teacher-badge{position:absolute;left:16px;bottom:16px;background:var(--yellow);color:var(--ink);padding:12px 14px;border-radius:14px}
.teacher-badge span{display:block;font-weight:800;font-size:22px;line-height:1}
.teacher-badge small{font-size:9px;font-weight:800;text-transform:uppercase}
.light-kicker{color:var(--yellow)}
.teacher-copy{position:relative;z-index:1}
.teacher-copy h3{margin:8px 0 16px;color:#d9c8e5;font-size:14px}
.teacher-copy p{margin:0;color:#eadff0;max-width:650px;font-size:13px}
.teacher-facts{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.teacher-facts span{border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:8px 11px;font-size:10px}
.teacher-facts b{color:var(--yellow)}

.cta-section{padding-top:20px}
.cta-card{
  display:flex;flex-direction:column;gap:24px;align-items:flex-start;justify-content:space-between;
  background:var(--yellow);border-radius:28px;padding:28px;overflow:hidden;position:relative
}
.cta-card:after{content:"√";position:absolute;right:15px;top:-35px;font-size:180px;font-weight:800;color:rgba(0,0,0,.05)}
.cta-card .section-kicker{color:#6f5b00}
.cta-card h2{position:relative;z-index:1}

.site-footer{padding:38px 0 100px;border-top:1px solid var(--line)}
.footer-grid{display:grid;gap:24px}
.footer-brand{margin-bottom:8px}
.site-footer p{margin:0;color:var(--muted);font-size:12px}
.footer-links{display:flex;gap:18px;font-size:12px;font-weight:700}
.footer-copy{font-size:10px;color:var(--muted)}

.mobile-bottom-nav{
  position:fixed;z-index:90;left:10px;right:10px;bottom:10px;height:62px;
  border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);
  display:grid;grid-template-columns:repeat(4,1fr);box-shadow:0 12px 40px rgba(32,18,40,.15);padding:4px
}
.mobile-bottom-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:9px;font-weight:700;color:#77717c;border-radius:13px}
.mobile-bottom-nav a span{font-size:17px;line-height:1.1}
.mobile-bottom-nav a.active{background:var(--purple-soft);color:var(--purple)}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.12s}
.reveal-delay-2{transition-delay:.22s}

/* Catalog */
.courses-page{background:var(--surface)}
.catalog-hero{padding:125px 0 48px;background:#fff;border-bottom:1px solid var(--line)}
.catalog-hero h1{font-size:clamp(40px,8vw,68px);line-height:1;letter-spacing:-2.5px;margin:8px 0 14px}
.catalog-hero h1 span{color:var(--purple)}
.catalog-hero p{margin:0;color:var(--muted)}
.search-shell{
  margin-top:28px;display:grid;grid-template-columns:22px 1fr auto;align-items:center;gap:10px;
  max-width:760px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:0 14px;
}
.search-shell:focus-within{border-color:rgba(102,34,159,.5);box-shadow:0 0 0 4px rgba(102,34,159,.07)}
.search-shell svg{width:20px;fill:none;stroke:var(--muted);stroke-width:2}
.search-shell input{height:54px;border:0;outline:0;background:transparent;width:100%;font-size:13px}
.search-shell kbd{font-size:9px;padding:4px 6px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted)}
.catalog-section{padding:28px 0 100px}
.catalog-layout{display:grid;gap:24px}
.filters-panel{
  display:none;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;height:max-content
}
.filter-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.filter-title h2{font-size:16px;margin:0}
.filter-title button{border:0;background:none;color:var(--purple);font-size:10px;font-weight:700;cursor:pointer}
.filter-group{display:grid;gap:8px;margin-top:22px}
.filter-label{text-transform:uppercase;font-size:9px;font-weight:800;letter-spacing:.8px;color:var(--muted);margin-bottom:3px}
.filter-group label{display:flex;align-items:center;gap:8px;font-size:12px;cursor:pointer}
.filter-group input{accent-color:var(--purple)}
.catalog-toolbar{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:18px}
.catalog-toolbar h2{margin:0;font-size:22px}
.catalog-toolbar select{height:40px;border:1px solid var(--line);border-radius:11px;background:#fff;padding:0 10px;font-size:11px}
.course-grid{display:grid;gap:14px}
.course-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:.25s ease}
.course-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(53,26,68,.08)}
.course-thumb{position:relative;height:150px;padding:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.thumb-purple{background:linear-gradient(145deg,var(--purple),#8b3cc3)}
.thumb-yellow{background:linear-gradient(145deg,#ffe548,var(--yellow))}
.thumb-soft{background:linear-gradient(145deg,#efe8f4,#faf7fc)}
.course-level{position:absolute;left:14px;top:14px;font-size:9px;font-weight:800;color:#fff;border:1px solid rgba(255,255,255,.25);padding:5px 7px;border-radius:999px}
.course-level.dark{color:var(--ink);border-color:rgba(0,0,0,.12)}
.course-symbol{font-family:Georgia,serif;font-size:57px;font-style:italic;color:#fff;text-shadow:0 10px 25px rgba(0,0,0,.13)}
.course-symbol.dark{color:var(--ink)}
.course-body{padding:16px}
.course-tags{display:flex;gap:5px;margin-bottom:8px}
.course-tags span{font-size:8px;text-transform:uppercase;font-weight:800;letter-spacing:.5px;color:var(--purple);background:var(--purple-soft);padding:4px 6px;border-radius:999px}
.course-body h3{margin:0 0 7px;font-size:18px;letter-spacing:-.4px}
.course-body p{margin:0 0 16px;color:var(--muted);font-size:11px}
.course-body a{display:flex;justify-content:space-between;align-items:center;color:var(--purple);font-size:11px;font-weight:800}
.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}
.empty-state div{font-size:40px;color:var(--purple)}
.empty-state h3{color:var(--ink);margin:6px 0}
.empty-state p{font-size:12px}

/* Lesson */
.lesson-main{padding:110px 0 100px;background:var(--surface);min-height:100vh}
.breadcrumb{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:10px;color:var(--muted);margin-bottom:18px}
.breadcrumb a:hover{color:var(--purple)}
.lesson-hero-card{
  position:relative;overflow:hidden;background:var(--purple);color:#fff;border-radius:28px;padding:28px;min-height:250px;
  display:flex;align-items:flex-end;
}
.lesson-hero-card .section-kicker{color:var(--yellow)}
.lesson-hero-card h1{font-size:clamp(36px,7vw,60px);line-height:1;letter-spacing:-2px;margin:7px 0 12px;max-width:750px}
.lesson-hero-card p{margin:0;color:#e8d9f1;max-width:560px;font-size:12px}
.lesson-hero-symbol{position:absolute;right:-12px;top:-85px;font-family:Georgia,serif;font-size:280px;font-style:italic;color:rgba(255,255,255,.055)}
.lesson-layout{display:grid;gap:18px;margin-top:18px}
.lesson-sidebar{display:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;height:max-content}
.lesson-sidebar a{display:block;padding:9px 10px;border-radius:10px;font-size:11px;font-weight:700;color:var(--muted);margin-top:4px}
.lesson-sidebar a.active,.lesson-sidebar a:hover{background:var(--purple-soft);color:var(--purple)}
.lesson-content{display:grid;gap:14px}
.lesson-block{display:grid;grid-template-columns:42px 1fr;gap:12px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}
.lesson-block-icon{width:42px;height:42px;border-radius:13px;background:var(--purple-soft);color:var(--purple);display:grid;place-items:center;font-size:10px;font-weight:800}
.lesson-block h2{margin:0 0 7px;font-size:22px}
.lesson-block p{margin:0 0 16px;color:var(--muted);font-size:12px}
.placeholder-content{display:grid;gap:8px;background:var(--surface);padding:16px;border-radius:12px}
.placeholder-content div{height:8px;background:#e7e0ea;border-radius:999px}
.placeholder-content .short{width:62%}
.pdf-card{display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:10px;border:1px solid var(--line);border-radius:13px;padding:10px}
.pdf-icon{width:42px;height:42px;border-radius:10px;background:#fff0f0;color:#bd2f2f;display:grid;place-items:center;font-size:9px;font-weight:900}
.pdf-card strong,.pdf-card span{display:block}
.pdf-card strong{font-size:11px}
.pdf-card span{font-size:9px;color:var(--muted)}
.pdf-action{font-size:20px!important;color:var(--purple)!important}

@media (min-width:720px){
  .container{width:min(1180px,calc(100% - 56px))}
  .hero{padding-top:150px}
  .hero-layout{grid-template-columns:1.06fr .94fr}
  .hero h1{font-size:64px}
  .stats-strip{grid-template-columns:repeat(4,1fr)}
  .level-grid{grid-template-columns:1fr 1fr}
  .section-heading{flex-direction:row;align-items:end;justify-content:space-between}
  .method-layout{grid-template-columns:.8fr 1.2fr;align-items:start}
  .method-steps{grid-template-columns:1fr 1fr}
  .teacher-card{grid-template-columns:.72fr 1.28fr;padding:30px;align-items:center}
  .teacher-visual{min-height:360px}
  .cta-card{flex-direction:row;align-items:center;padding:38px}
  .footer-grid{grid-template-columns:1.2fr .8fr auto;align-items:end}
  .course-grid{grid-template-columns:1fr 1fr}
  .lesson-layout{grid-template-columns:180px 1fr}
  .lesson-sidebar{display:block;position:sticky;top:95px}
  .lesson-block{padding:24px;grid-template-columns:48px 1fr}
}
@media (min-width:980px){
  .desktop-nav{display:flex}
  .header-cta{display:inline-flex}
  .menu-btn,.mobile-menu,.mobile-bottom-nav{display:none!important}
  .site-footer{padding-bottom:38px}
  .hero h1{font-size:72px}
  .level-grid{grid-template-columns:repeat(4,1fr)}
  .level-card{min-height:310px}
  .level-card h3{margin-top:78px}
  .catalog-layout{grid-template-columns:210px 1fr}
  .filters-panel{display:block;position:sticky;top:96px}
  .course-grid{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:1200px){
  .course-grid{grid-template-columns:repeat(3,1fr)}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}


/* Mobile header fix */
@media (max-width:979px){
  .header-cta{
    display:none !important;
  }

  .header-inner{
    gap:12px;
  }

  .brand{
    min-width:0;
  }

  .brand-text{
    white-space:nowrap;
    font-size:17px;
  }

  .menu-btn{
    flex:0 0 auto;
  }
}