/* CutCraft Academy — premium dark theme */
:root{
  --bg:#0a0c11; --bg2:#0e1118; --panel:#12151d; --panel2:#171b25; --line:#242a37;
  --fg:#eef1f7; --mut:#9aa3b5; --dim:#6b7488;
  --accent:#ff3b5c; --accent2:#7c5cff; --good:#1ec97b; --warn:#ffb020;
  --grad:linear-gradient(135deg,#ff3b5c,#7c5cff);
  --radius:16px; --shadow:0 20px 50px rgba(0,0,0,.45);
  --maxw:1120px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:
    radial-gradient(1200px 600px at 80% -10%,rgba(124,92,255,.14),transparent 60%),
    radial-gradient(1000px 500px at -10% 10%,rgba(255,59,92,.12),transparent 55%),
    var(--bg);
  color:var(--fg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:"Space Grotesk",Inter,sans-serif;font-weight:700;line-height:1.1;margin:0;text-wrap:balance}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--mut)}
.center{text-align:center}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;border-radius:12px;
  padding:13px 22px;font-weight:600;font-size:15px;font-family:inherit;transition:transform .12s ease,box-shadow .2s,background .2s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(255,59,92,.32)}
.btn-primary:hover{box-shadow:0 14px 34px rgba(255,59,92,.45)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--fg);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent2)}
.btn-block{width:100%;justify-content:center}
.pill{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;
  background:rgba(124,92,255,.12);border:1px solid rgba(124,92,255,.3);color:#c9bdff;font-size:13px;font-weight:600}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 10px var(--good)}

/* ---------- NAV ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);
  background:rgba(10,12,17,.72);border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:18px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:"Space Grotesk";font-weight:800;font-size:19px;letter-spacing:.3px}
.brand .mark{width:28px;height:28px;border-radius:8px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:15px;box-shadow:0 6px 16px rgba(255,59,92,.4)}
.nav .spacer{flex:1}
.nav .links{display:flex;gap:22px;align-items:center}
.nav .links a{color:var(--mut);font-size:14.5px;font-weight:500}
.nav .links a:hover{color:var(--fg)}

/* ---------- HERO ---------- */
.hero{padding:64px 0 40px;position:relative;isolation:isolate;overflow:hidden;overflow:clip}
.hero-grid>*{min-width:0}
.hero h1{font-size:clamp(34px,6vw,60px);letter-spacing:-1px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(16px,2.4vw,20px);color:var(--mut);max-width:620px;margin:20px 0 0}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero .trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;color:var(--mut);font-size:14px}
.hero .trust b{color:var(--fg)}
.hero-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:30px;align-items:center}
.heroart{position:relative;aspect-ratio:16/11;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:linear-gradient(160deg,#171b26,#0d1016);box-shadow:var(--shadow)}
.heroart .glow{position:absolute;inset:0;background:radial-gradient(60% 60% at 50% 40%,rgba(124,92,255,.22),transparent 70%)}
.heroart .play{position:absolute;inset:0;display:grid;place-items:center}
.heroart .play .circ{width:84px;height:84px;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:30px;box-shadow:0 14px 40px rgba(255,59,92,.5)}
.heroart .tag{position:absolute;left:16px;bottom:14px;font-weight:700;font-size:15px;text-shadow:0 1px 8px #000}
.heroart .chips{position:absolute;right:14px;top:14px;display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.heroart .chip{background:rgba(0,0,0,.55);border:1px solid var(--line);border-radius:10px;padding:6px 11px;font-size:12px;color:#d6dbe6}

/* ---------- SECTION ---------- */
.section{padding:56px 0}
.section h2{font-size:clamp(26px,4vw,38px);letter-spacing:-.5px}
.section .sub{color:var(--mut);margin-top:10px;max-width:560px}
.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:12.5px;font-weight:700;color:var(--accent2)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.stat .n{font-family:"Space Grotesk";font-size:30px;font-weight:800}
.stat .n .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--mut);font-size:13.5px;margin-top:4px}

/* curriculum */
.acc{display:flex;flex-direction:column;gap:12px;margin-top:28px}
.mod{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.mod>.head{display:flex;align-items:center;gap:14px;padding:18px 20px;cursor:pointer;user-select:none}
.mod>.head .ix{width:30px;height:30px;border-radius:9px;background:var(--panel2);border:1px solid var(--line);display:grid;place-items:center;font-weight:700;color:var(--accent2);font-size:14px}
.mod>.head .t{font-weight:600}
.mod>.head .meta{margin-left:auto;color:var(--dim);font-size:13px}
.mod>.head .arw{transition:transform .2s;color:var(--mut)}
.mod.open>.head .arw{transform:rotate(90deg)}
.mod>.body{display:none;padding:0 20px 8px 64px}
.mod.open>.body{display:block}
.mod .row{display:flex;align-items:center;gap:12px;padding:11px 0;border-top:1px solid var(--line);color:var(--mut);font-size:14.5px}
.mod .row .lk{color:var(--dim);font-size:16px}
.mod .row .d{margin-left:auto;color:var(--dim);font-size:13px;font-variant-numeric:tabular-nums}

/* pricing */
.price-wrap{display:grid;grid-template-columns:1fr;max-width:460px;margin:30px auto 0}
.price{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:20px;padding:30px;position:relative;box-shadow:var(--shadow)}
.price .ribbon{position:absolute;top:-12px;right:22px}
.price .amt{font-family:"Space Grotesk";font-size:48px;font-weight:800;display:flex;align-items:baseline;gap:8px}
.price .amt s{color:var(--dim);font-size:22px;font-weight:500}
.price ul{list-style:none;padding:0;margin:18px 0 24px;display:flex;flex-direction:column;gap:11px}
.price li{display:flex;gap:10px;align-items:flex-start;color:#cfd5e2;font-size:14.5px}
.price li .ck{color:var(--good);flex:none;margin-top:2px}
.price .note{color:var(--dim);font-size:12.5px;text-align:center;margin-top:12px}

/* testimonials */
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.tcard{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.tcard .q{font-size:14.5px;color:#d8dde8}
.tcard .who{display:flex;align-items:center;gap:10px;margin-top:16px}
.tcard .av{width:36px;height:36px;border-radius:50%;background:var(--grad);display:grid;place-items:center;font-weight:700;color:#fff;font-size:14px}
.tcard .who .nm{font-weight:600;font-size:14px}
.tcard .who .rl{color:var(--dim);font-size:12.5px}

/* faq */
.faq{display:flex;flex-direction:column;gap:10px;max-width:760px;margin:26px auto 0}
.qa{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px;cursor:pointer}
.qa .q{font-weight:600;display:flex;gap:12px;align-items:center}
.qa .q .arw{margin-left:auto;color:var(--mut);transition:transform .2s}
.qa.open .q .arw{transform:rotate(45deg)}
.qa .a{color:var(--mut);font-size:14.5px;margin-top:0;max-height:0;overflow:hidden;transition:max-height .25s,margin-top .25s}
.qa.open .a{max-height:240px;margin-top:12px}

/* cta band */
.band{background:linear-gradient(135deg,rgba(255,59,92,.14),rgba(124,92,255,.14));
  border:1px solid var(--line);border-radius:22px;padding:44px;text-align:center;margin:10px 0}
.band h2{font-size:clamp(24px,4vw,34px)}

/* footer */
.footer{border-top:1px solid var(--line);margin-top:40px;padding:28px 0;color:var(--dim);font-size:13.5px}
.footer .container{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.footer .spacer{flex:1}

/* ---------- LOGIN ---------- */
.auth-wrap{min-height:calc(100vh - 66px);display:grid;place-items:center;padding:40px 20px}
.auth{width:100%;max-width:410px;background:linear-gradient(180deg,var(--panel2),var(--panel));
  border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--shadow)}
.auth h1{font-size:25px}
.auth p.s{color:var(--mut);font-size:14px;margin:8px 0 22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--mut);margin-bottom:7px;font-weight:500}
.field input{width:100%;background:var(--bg2);border:1px solid var(--line);border-radius:11px;
  padding:13px 14px;color:var(--fg);font-size:15px;font-family:inherit;outline:none;transition:border .15s,box-shadow .15s}
.field input:focus{border-color:var(--accent2);box-shadow:0 0 0 3px rgba(124,92,255,.18)}
.field input.key{letter-spacing:1px;text-transform:uppercase;font-family:ui-monospace,monospace}
.msg{font-size:13.5px;border-radius:10px;padding:10px 12px;margin-bottom:14px;display:none}
.msg.err{display:block;background:rgba(255,59,92,.12);border:1px solid rgba(255,59,92,.35);color:#ffb3c0}
.msg.ok{display:block;background:rgba(30,201,123,.12);border:1px solid rgba(30,201,123,.35);color:#9af0c4}
.auth .hint{color:var(--dim);font-size:12.5px;text-align:center;margin-top:16px}
.auth .hint a{color:var(--accent2)}

/* ---------- MEMBER AREA ---------- */
.app-top{position:sticky;top:0;z-index:40;background:rgba(10,12,17,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.app-top .container{display:flex;align-items:center;gap:14px;height:60px}
.app-top .spacer{flex:1}
.app-top .who{color:var(--mut);font-size:13.5px}
.app{display:grid;grid-template-columns:320px 1fr;gap:0;min-height:calc(100vh - 60px)}
.side{border-right:1px solid var(--line);background:var(--bg2);padding:18px 14px;overflow-y:auto;max-height:calc(100vh - 60px)}
.side .shead{font-size:12px;text-transform:uppercase;letter-spacing:1.5px;color:var(--dim);margin:18px 8px 8px;font-weight:700}
.side .shead:first-child{margin-top:4px}
.lesson{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:10px;cursor:pointer;color:var(--mut);font-size:14px}
.lesson:hover{background:var(--panel)}
.lesson.active{background:rgba(124,92,255,.14);color:var(--fg);border:1px solid rgba(124,92,255,.3)}
.lesson .ic{width:24px;height:24px;border-radius:7px;background:var(--panel2);border:1px solid var(--line);display:grid;place-items:center;font-size:11px;flex:none}
.lesson.active .ic{background:var(--grad);border:0;color:#fff}
.lesson .tt{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lesson .dd{color:var(--dim);font-size:12px;flex:none;font-variant-numeric:tabular-nums}
.main{padding:22px 26px 60px;min-width:0}
.main .crumb{color:var(--dim);font-size:13px;margin-bottom:12px}
.main h2.ltitle{font-size:22px;margin-bottom:16px}
.main .ldesc{color:var(--mut);font-size:14.5px;margin-top:18px;max-width:720px}

/* ---------- HIDDEN YOUTUBE PLAYER ---------- */
.player{background:#000;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.stage{position:relative;width:100%;aspect-ratio:16/9;background:#000;overflow:hidden}
.stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;pointer-events:none}
.shield{position:absolute;inset:0;z-index:2;cursor:pointer;background:transparent}
.mask-top,.mask-bot{position:absolute;left:0;right:0;z-index:3;pointer-events:none;opacity:0;transition:opacity .2s}
.mask-top{top:0;height:90px;background:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.94) 45%,transparent 100%)}
.mask-bot{bottom:0;height:74px;background:linear-gradient(to top,#000 0%,rgba(0,0,0,.88) 45%,transparent 100%)}
.stage.playing .mask-top,.stage.playing .mask-bot{opacity:1}
.cover{position:absolute;inset:0;z-index:4;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 120% at 50% 40%,#141821,#000);cursor:pointer}
.cover.hidden{display:none}
.bigplay{width:78px;height:78px;border-radius:50%;border:0;cursor:pointer;background:var(--grad);color:#fff;
  font-size:28px;display:grid;place-items:center;box-shadow:0 12px 34px rgba(255,59,92,.5)}
.cover .cap{position:absolute;left:18px;bottom:16px;color:#fff;font-weight:700;font-size:15px;text-shadow:0 1px 8px #000}
.cover.loading .bigplay{opacity:.4;pointer-events:none}
.bar{display:flex;align-items:center;gap:10px;padding:11px 12px;background:var(--panel);border-top:1px solid var(--line);flex-wrap:wrap}
.bar button{background:#222838;color:var(--fg);border:1px solid var(--line);border-radius:9px;padding:7px 11px;cursor:pointer;font-size:13px;line-height:1;font-family:inherit}
.bar button:hover{border-color:var(--accent2)}
.bar .icon{min-width:40px}
#seek{flex:1;min-width:120px;accent-color:var(--accent)}
.time{color:var(--mut);font-variant-numeric:tabular-nums;font-size:12px;min-width:92px;text-align:center}
.speeds{display:flex;gap:4px;margin-left:auto}
.speeds button.on{background:var(--grad);border-color:transparent;color:#fff}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .tgrid{grid-template-columns:1fr}
  .nav .links{display:none}
  .app{grid-template-columns:1fr}
  .side{max-height:none;border-right:0;border-bottom:1px solid var(--line)}
}
@media(max-width:480px){
  .stats{grid-template-columns:1fr 1fr}
  .hero{padding:48px 0 20px}
}

/* =====================================================================
   3D LAYER: hero timeline, cut-glitch headline, marquee, layer stack,
   tilt + glare, scroll reveal
   ===================================================================== */

/* moving perspective grid floor behind the hero */
.hero::before{content:"";position:absolute;left:-15%;right:-15%;bottom:-30px;height:380px;z-index:-1;
  background-image:linear-gradient(rgba(124,92,255,.22) 1px,transparent 1px),linear-gradient(90deg,rgba(124,92,255,.22) 1px,transparent 1px);
  background-size:46px 46px;transform:perspective(600px) rotateX(64deg);transform-origin:bottom;
  -webkit-mask-image:linear-gradient(to top,#000 10%,transparent 85%);mask-image:linear-gradient(to top,#000 10%,transparent 85%);
  animation:gridmove 5s linear infinite;opacity:.5}
@keyframes gridmove{to{background-position:0 46px}}

/* 3D canvas stage */
.hero3d{position:relative;width:100%;max-width:100%;min-width:0;aspect-ratio:1/.9}
.hero3d canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity .8s ease}
.hero3d.ready canvas{opacity:1}
.hud{position:absolute;left:8px;top:4px;z-index:2;display:flex;gap:8px;align-items:center;
  font:600 12px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#cfd5e2;
  background:rgba(10,12,17,.62);border:1px solid var(--line);border-radius:9px;padding:8px 11px;
  backdrop-filter:blur(6px);font-variant-numeric:tabular-nums;pointer-events:none}
.hud .rec{color:var(--accent);animation:blink 1.2s steps(2) infinite}
.hud .sep{color:var(--dim)}
@keyframes blink{50%{opacity:.2}}
.float-chip{position:absolute;z-index:2;pointer-events:none;background:rgba(18,21,29,.8);border:1px solid var(--line);
  border-radius:12px;padding:8px 12px;font-size:12.5px;font-weight:600;color:#e3e7f0;
  box-shadow:0 12px 30px rgba(0,0,0,.45);backdrop-filter:blur(6px);animation:floaty 5s ease-in-out infinite}
.float-chip i{font-style:normal;margin-right:6px}
.fc1{right:3%;top:2%}
.fc2{left:1%;bottom:16%;animation-delay:-1.7s}
.fc3{right:6%;bottom:5%;animation-delay:-3.2s}
@keyframes floaty{0%,100%{transform:translate3d(0,0,0) rotate(-1.2deg)}50%{transform:translate3d(0,-10px,0) rotate(1.2deg)}}
.hero3d .fallback{display:none;position:absolute;inset:0;aspect-ratio:auto}
.hero3d.no3d .fallback{display:block}
.hero3d.no3d canvas,.hero3d.no3d .hud{display:none}

/* headline cut glitch: the word gets sliced like a split on the timeline */
.cutword{position:relative;display:inline-block}
.cutword::before,.cutword::after{content:attr(data-text);position:absolute;left:0;top:0;width:100%;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;pointer-events:none;opacity:0}
.cutword::before{clip-path:inset(0 0 55% 0);animation:sliceA 4.6s infinite}
.cutword::after{clip-path:inset(45% 0 0 0);animation:sliceB 4.6s infinite}
@keyframes sliceA{0%,86%,100%{opacity:0;transform:none}88%{opacity:1;transform:translate(-7px,-1px)}91%{opacity:1;transform:translate(4px,0)}93%{opacity:0}}
@keyframes sliceB{0%,86%,100%{opacity:0;transform:none}88%{opacity:1;transform:translate(8px,1px)}91%{opacity:1;transform:translate(-3px,0)}93%{opacity:0}}

/* tilted feature marquee */
.marquee-wrap{overflow:hidden;overflow:clip;padding:30px 0 10px}
.marquee{transform:rotate(-2deg);margin:0 -40px;padding:15px 0;
  background:linear-gradient(90deg,rgba(255,59,92,.16),rgba(124,92,255,.18),rgba(34,211,238,.12));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.marquee .track{display:flex;gap:46px;width:max-content;animation:marq 36s linear infinite}
.marquee span{font-family:"Space Grotesk",Inter,sans-serif;font-weight:700;font-size:20px;white-space:nowrap;color:#e9ecf4;
  display:inline-flex;gap:10px;align-items:center}
.marquee span b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
@keyframes marq{to{transform:translateX(-50%)}}

/* think-in-layers exploding 3D stack */
.layers-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center}
.layer-list{list-style:none;padding:0;margin:24px 0 0;display:flex;flex-direction:column;gap:16px}
.layer-list li{display:flex;gap:14px;align-items:flex-start}
.layer-list .sw{width:13px;height:13px;border-radius:4px;margin-top:6px;flex:none}
.layer-list b{display:block;font-weight:600}
.layer-list span.d{color:var(--mut);font-size:14px}
.stack3d{position:relative;height:450px;perspective:1300px;--gap:30px;--rx:0deg;--rz:0deg}
.stack3d.open{--gap:74px}
.stack3d .scene3d{position:absolute;left:50%;top:56%;width:340px;height:215px;margin:-108px 0 0 -170px;transform-style:preserve-3d;
  transform:rotateX(calc(58deg + var(--rx))) rotateZ(calc(-34deg + var(--rz)));transition:transform .45s ease-out}
.stack3d .layer{position:absolute;inset:0;border-radius:16px;border:1px solid rgba(255,255,255,.16);overflow:hidden;
  transform:translateZ(calc(var(--i) * var(--gap)));transition:transform 1s cubic-bezier(.2,.8,.2,1);
  box-shadow:0 30px 60px rgba(0,0,0,.5)}
.stack3d .layer .tag{position:absolute;left:12px;top:10px;font:700 11.5px/1 Inter,sans-serif;letter-spacing:1px;text-transform:uppercase;
  background:rgba(0,0,0,.5);padding:6px 9px;border-radius:7px;color:#fff;z-index:2}
.l-audio{background:linear-gradient(135deg,rgba(30,201,123,.45),rgba(8,60,40,.7))}
.l-audio .bars{position:absolute;left:14px;right:14px;bottom:18px;top:44px;display:flex;align-items:center;gap:4px}
.l-audio .bars i{flex:1;background:#5ef0ad;border-radius:3px;height:30%;animation:eq 1s ease-in-out infinite alternate}
.l-audio .bars i:nth-child(3n){animation-delay:-.3s;height:70%}
.l-audio .bars i:nth-child(4n){animation-delay:-.6s;height:50%}
.l-audio .bars i:nth-child(5n){animation-delay:-.15s;height:85%}
@keyframes eq{to{transform:scaleY(.35)}}
.l-video{background:#0d1018}
.l-video .film{position:absolute;left:12px;right:12px;top:40px;bottom:14px;display:flex;gap:6px}
.l-video .film i{flex:1;border-radius:8px;background:linear-gradient(180deg,#ff6f87,#7a1c3c)}
.l-video .film i:nth-child(2){background:linear-gradient(180deg,#ff9f5a,#8a2b12)}
.l-video .film i:nth-child(3){background:linear-gradient(180deg,#a68bff,#2f1c78)}
.l-video .film i:nth-child(4){background:linear-gradient(180deg,#45d9f0,#0d4b5c)}
.l-text{background:rgba(124,92,255,.42)}
.l-text .aa{position:absolute;left:16px;bottom:16px;font:800 64px/1 "Space Grotesk",sans-serif;color:#fff;text-shadow:0 6px 20px rgba(0,0,0,.4)}
.l-text .ln{position:absolute;right:16px;bottom:22px;width:46%;display:flex;flex-direction:column;gap:8px}
.l-text .ln i{height:9px;border-radius:5px;background:rgba(255,255,255,.85)}
.l-text .ln i:nth-child(2){width:70%;opacity:.7}
.l-fx{background-color:rgba(34,211,238,.18);
  background-image:radial-gradient(circle at 30% 40%,rgba(255,255,255,.55) 0 2px,transparent 3px),
    radial-gradient(circle at 70% 60%,rgba(255,255,255,.5) 0 2px,transparent 3px),
    radial-gradient(circle at 55% 25%,rgba(255,255,255,.45) 0 1.5px,transparent 2.5px),
    radial-gradient(60% 60% at 50% 50%,rgba(34,211,238,.35),transparent 70%)}

/* 3D tilt + glare */
[data-tilt]{position:relative;transform-style:preserve-3d;transition:transform .18s ease-out;will-change:transform}
[data-tilt]::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(420px circle at var(--gx,50%) var(--gy,50%),rgba(255,255,255,.10),transparent 45%);
  opacity:0;transition:opacity .25s}
[data-tilt].tilting::after{opacity:1}

/* scroll reveal (JS applies it only to below-the-fold elements) */
[data-reveal].pending{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
[data-reveal].pending.in{opacity:1;transform:none}

@media(max-width:900px){
  .hero3d{aspect-ratio:1/.95}
  .float-chip{font-size:11.5px;padding:7px 10px}
  .layers-grid{grid-template-columns:1fr}
  .stack3d{height:380px}
  .stack3d .scene3d{width:280px;height:178px;margin:-89px 0 0 -140px}
  .marquee span{font-size:17px}
}
@media(prefers-reduced-motion:reduce){
  .hero::before,.marquee .track,.float-chip,.cutword::before,.cutword::after,.hud .rec,.l-audio .bars i{animation:none}
  .stack3d .layer,.stack3d .scene3d{transition:none}
}
/* member area: course switcher (owned + locked courses) */
.cswitch{display:flex;flex-direction:column;gap:6px;margin-bottom:10px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.08)}
.cbtn{all:unset;box-sizing:border-box;display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:12px;cursor:pointer;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03)}
.cbtn:hover{border-color:rgba(255,255,255,.22)}
.cbtn.on{background:linear-gradient(100deg,rgba(109,93,252,.35),rgba(200,75,240,.3));border-color:rgba(200,160,255,.5)}
.cbtn .ct{font-weight:700;font-size:13.5px;color:#fff}
.cbtn .cn{font-size:12px;opacity:.65}
.cbtn.locked{opacity:.7;text-decoration:none}
.cbtn.locked:hover{opacity:1}