body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}

  :root {
  --bg:#0a0a0c;
  --bg2:#111114;
  --bg3:#18181d;
  --border:rgba(255,255,255,.07);
  --text:#e4e0d8;
  --muted:rgba(228,224,216,.45);
  --red:#e8312b;
  --red-lt:#f5635e;
  --red-dk:#a01f1b;
  --gold:#f5a623;
  --gold-lt:#ffc046;
  --blue:#4a9eff;
  --blue-lt:#7dbfff;
  --purple:#9b6bff;
  --purple-dk:#6040a0;
  --green:#3ddc84;
  --teal:#70A3A7;
  --rose:#BC4749;
}
code,pre{font-family:'DM Mono',monospace}

/* -- HEADER -- */

/* -- HERO -- */
.hero{position:relative;overflow:hidden;min-height:72vh;display:flex;align-items:center;background:var(--bg)}
.hero-scanlines{position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(255,255,255,.012) 2px,rgba(255,255,255,.012) 4px);z-index:1}
.hero-glow-purple{position:absolute;top:-200px;right:-100px;width:600px;height:600px;background:radial-gradient(ellipse,rgba(155,107,255,.18) 0%,transparent 65%);pointer-events:none;z-index:0}
.hero-glow-gold{position:absolute;bottom:-100px;left:-100px;width:500px;height:400px;background:radial-gradient(ellipse,rgba(245,166,35,.1) 0%,transparent 65%);pointer-events:none;z-index:0}
.hero-inner{max-width:1200px;margin:0 auto;padding:80px 24px;display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center;position:relative;z-index:2}
@media(max-width:760px){.hero-inner{grid-template-columns:1fr;gap:40px;padding:60px 24px}}
.hero-kicker{font-family:'DM Mono',monospace;font-size:.7rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--purple);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.hero-kicker::before{content:'';width:24px;height:2px;background:var(--purple)}
.hero-title{font-family:'Bebas Neue',cursive;font-size:clamp(3rem,7vw,5.6rem);line-height:.95;letter-spacing:.02em;margin-bottom:20px}
.hero-title .accent{color:var(--purple)}
.hero-title .dim{color:rgba(228,224,216,.35);font-size:.55em;display:block;margin-top:6px}
.hero-sub{font-size:1rem;color:var(--muted);line-height:1.75;margin-bottom:32px;max-width:480px}
.hero-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px}
.hero-pill{font-family:'DM Mono',monospace;font-size:.68rem;font-weight:500;padding:5px 12px;border-radius:6px;background:rgba(255,255,255,.05);border:1px solid var(--border);letter-spacing:.06em;text-transform:uppercase}
.hero-pill.purple{border-color:rgba(155,107,255,.3);color:var(--purple);background:rgba(155,107,255,.08)}
.hero-pill.gold{border-color:rgba(245,166,35,.3);color:var(--gold-lt);background:rgba(245,166,35,.08)}
.hero-pill.green{border-color:rgba(61,220,132,.3);color:var(--green);background:rgba(61,220,132,.08)}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap}
.btn-purple{display:inline-flex;align-items:center;gap:8px;background:var(--purple);color:white;font-family:'Bebas Neue',cursive;font-size:1.1rem;letter-spacing:.08em;padding:13px 28px;border-radius:10px;box-shadow:0 4px 0 var(--purple-dk),0 8px 32px rgba(155,107,255,.3);transition:transform .12s,filter .15s}
.btn-purple:hover{filter:brightness(1.12);transform:translateY(-2px)}

/* Hero stage preview */
.stage-preview{position:relative;background:var(--bg3);border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.stage-preview-head{padding:10px 14px;font-family:'DM Mono',monospace;font-size:.7rem;color:var(--muted);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.stage-preview-head::before{content:'';width:10px;height:10px;border-radius:50%;background:var(--green);box-shadow:-16px 0 0 var(--gold),-32px 0 0 var(--red)}
.stage-preview-.stage-preview-body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
.sp-mountain{position:absolute;bottom:30%;left:0;right:0;height:50px;background:rgba(40,50,75,.7);clip-path:polygon(0 100%,12% 30%,22% 60%,38% 10%,52% 50%,68% 20%,82% 55%,100% 25%,100% 100%)}
.sp-hill{position:absolute;bottom:30%;left:0;right:0;height:30px;background:rgba(45,75,55,.85);clip-path:polygon(0 100%,15% 40%,30% 70%,48% 30%,62% 60%,78% 35%,100% 50%,100% 100%)}
.sp-floor{position:absolute;bottom:0;left:0;right:0;height:30%;background:linear-gradient(180deg,#5a4a30,#2a1a08)}
.sp-floor::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:rgba(220,180,120,.6)}
.sp-fighter{position:absolute;bottom:30%;width:18px;height:34px;border-radius:3px}
.sp-fighter.p1{left:38%;background:linear-gradient(180deg,var(--red),var(--red-dk))}
.sp-fighter.p2{right:38%;background:linear-gradient(180deg,var(--blue),#2860a8)}
.sp-fighter::before{content:'';position:absolute;top:-7px;left:50%;transform:translateX(-50%);width:12px;height:12px;border-radius:50%;background:inherit}
.sp-torch{position:absolute;bottom:36%;width:6px;height:18px;background:#704020;animation:flicker 0.4s steps(2) infinite}
.sp-torch::before{content:'';position:absolute;top:-9px;left:50%;transform:translateX(-50%);width:9px;height:11px;border-radius:50% 50% 30% 30%;background:radial-gradient(circle at 50% 70%,#ffe060,#ff6020);box-shadow:0 0 12px rgba(255,160,40,.7)}
.sp-torch.left{left:6%}
.sp-torch.right{right:6%}
@keyframes flicker{0%,100%{transform:scaleY(1)}50%{transform:scaleY(.9)}}
.stage-preview-label{position:absolute;top:8px;left:50%;transform:translateX(-50%);font-family:'Bebas Neue',cursive;font-size:.85rem;letter-spacing:.1em;color:rgba(255,255,255,.85);background:rgba(0,0,0,.4);padding:3px 12px;border-radius:4px;text-shadow:0 1px 2px rgba(0,0,0,.6)}

/* -- SECTION LAYOUT -- */
.section-wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section-label{font-family:'DM Mono',monospace;font-size:.68rem;font-weight:500;letter-spacing:.16em;text-transform:uppercase;margin-bottom:10px;display:inline-flex;align-items:center;gap:8px}
.section-label::before{content:'';width:16px;height:2px;background:currentColor}
.section-heading{font-family:'Bebas Neue',cursive;font-size:clamp(2rem,5vw,3.2rem);letter-spacing:.04em;color:white;margin-bottom:8px;line-height:1}
.section-desc{font-size:.95rem;color:var(--muted);line-height:1.7;max-width:640px}

/* -- BIG IDEA STRIP (the "what is a stage?" intro) -- */
.bigidea-section{padding:64px 0;border-bottom:1px solid var(--border);background:var(--bg2)}
.bigidea-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}
@media(max-width:760px){.bigidea-grid{grid-template-columns:1fr}}
.bigidea-card{background:var(--bg3);border:1px solid var(--border);border-radius:14px;padding:24px 22px}
.bigidea-num{font-family:'Bebas Neue',cursive;font-size:2.2rem;color:var(--purple);letter-spacing:.05em;line-height:1;margin-bottom:8px}
.bigidea-title{font-family:'Bebas Neue',cursive;font-size:1.3rem;letter-spacing:.05em;color:white;margin-bottom:8px}
.bigidea-text{font-size:.85rem;color:var(--muted);line-height:1.7}

/* -- COURSE / LESSON SECTION -- */
.course-section{padding:80px 0;border-bottom:1px solid var(--border)}
.course-grid{display:grid;grid-template-columns:280px 1fr;gap:0;margin-top:48px;background:var(--bg2);border:1px solid var(--border);border-radius:20px;overflow:hidden}
@media(max-width:700px){.course-grid{grid-template-columns:1fr}}

/* Sidebar */
.course-sidebar{background:var(--bg3);border-right:1px solid var(--border);padding:24px 0}
@media(max-width:700px){.course-sidebar{border-right:none;border-bottom:1px solid var(--border);padding:12px;display:flex;flex-wrap:wrap;gap:4px}}
.step-btn{width:100%;display:flex;align-items:center;gap:12px;padding:13px 20px;background:none;border:none;cursor:pointer;color:var(--muted);font-family:'DM Sans',sans-serif;font-size:.85rem;font-weight:500;transition:background .15s,color .15s;text-align:left}
.step-btn:hover{background:rgba(255,255,255,.04);color:var(--text)}
.step-btn.active{color:white;background:rgba(255,255,255,.06)}
.step-num{width:28px;height:28px;border-radius:50%;border:2px solid;display:flex;align-items:center;justify-content:center;font-family:'Bebas Neue',cursive;font-size:.9rem;letter-spacing:.05em;flex-shrink:0;transition:all .2s;color:var(--purple);border-color:var(--purple)}
.step-btn.active .step-num{background:var(--purple);border-color:var(--purple);color:var(--bg)}
@media(max-width:700px){.step-btn{width:auto;padding:8px 12px;border-radius:8px;font-size:.78rem}.step-num{width:22px;height:22px;font-size:.75rem}}

/* Main content */
.course-main{padding:36px 40px;min-height:480px}
@media(max-width:700px){.course-main{padding:24px 20px}}
.step-panel{display:none}
.step-panel.active{display:block}
.step-tag{font-family:'DM Mono',monospace;font-size:.65rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px;color:var(--purple)}
.step-title{font-family:'Bebas Neue',cursive;font-size:1.9rem;letter-spacing:.04em;color:white;margin-bottom:12px;line-height:1.1}
.step-body{font-size:.92rem;color:var(--muted);line-height:1.75}
.step-body p{margin-bottom:12px}
.step-body strong{color:var(--text);font-weight:600}
.step-body code{background:rgba(155,107,255,.1);border:1px solid rgba(155,107,255,.18);padding:1px 6px;border-radius:4px;font-size:.82em;color:var(--purple)}
.step-list{list-style:none;padding:0;margin:16px 0;display:flex;flex-direction:column;gap:8px}
.step-list li{display:flex;align-items:flex-start;gap:12px;background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:8px;padding:11px 14px;font-size:.86rem;color:var(--text);line-height:1.55}
.step-list li::before{content:attr(data-n);font-family:'Bebas Neue',cursive;font-size:.95rem;letter-spacing:.05em;color:var(--purple);min-width:22px;padding-top:1px;flex-shrink:0}
.code-block{background:#0d0d10;border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:16px 20px;margin:14px 0;overflow-x:auto}
.code-block pre{font-size:.78rem;line-height:1.7;color:#a8c8ff;white-space:pre}
.code-block .comment{color:#505060}
.code-block .key{color:var(--gold-lt)}
.code-block .val{color:var(--green)}
.code-block .edit{color:var(--red-lt);font-weight:600}
.tip-box{background:rgba(245,166,35,.07);border:1px solid rgba(245,166,35,.2);border-radius:10px;padding:12px 16px;margin:14px 0;font-size:.84rem;color:rgba(228,224,216,.78);display:flex;gap:10px;line-height:1.6}
.tip-box::before{content:'💡';flex-shrink:0}
.warn-box{background:rgba(232,49,43,.07);border:1px solid rgba(232,49,43,.2);border-radius:10px;padding:12px 16px;margin:14px 0;font-size:.84rem;color:rgba(228,224,216,.78);display:flex;gap:10px;line-height:1.6}
.warn-box::before{content:'⚠️';flex-shrink:0}
.try-box{background:rgba(61,220,132,.06);border:1px solid rgba(61,220,132,.2);border-radius:10px;padding:14px 18px;margin:14px 0;font-size:.86rem;color:var(--text);line-height:1.6}
.try-box-head{font-family:'Bebas Neue',cursive;font-size:1.05rem;letter-spacing:.06em;color:var(--green);margin-bottom:6px;display:flex;align-items:center;gap:8px}
.try-box-head::before{content:'🎮';font-size:1.1rem}
.step-nav{display:flex;gap:10px;margin-top:28px;padding-top:20px;border-top:1px solid var(--border)}
.btn-step{padding:9px 20px;border-radius:8px;font-family:'DM Sans',sans-serif;font-size:.82rem;font-weight:600;cursor:pointer;border:none;transition:background .15s,opacity .15s,filter .15s}
.btn-step-prev{background:rgba(255,255,255,.06);color:var(--muted)}
.btn-step-prev:hover:not(:disabled){background:rgba(255,255,255,.1);color:var(--text)}
.btn-step-next{background:var(--purple);color:white;box-shadow:0 3px 0 var(--purple-dk)}
.btn-step-next:hover:not(:disabled){filter:brightness(1.1)}
.btn-step:disabled{opacity:.3;cursor:default}

/* Folder structure visual */
.folder-tree{font-family:'DM Mono',monospace;font-size:.78rem;background:#0d0d10;border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:18px 22px;margin:14px 0;line-height:1.85;color:var(--muted)}
.folder-tree .folder{color:var(--gold-lt)}
.folder-tree .file{color:#a8c8ff}
.folder-tree .new{color:var(--green);font-weight:600}
.folder-tree .arrow{color:var(--red-lt);font-weight:600;margin-left:10px}

/* Delta interactive */
.delta-demo{margin:16px 0;background:var(--bg);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.delta-stage{position:relative;height:200px;background:linear-gradient(180deg,#1a2548,#3a4878 60%,#5a4830 60%,#2a1808 100%);overflow:hidden}
.delta-layer{position:absolute;font-family:'DM Mono',monospace;font-size:.7rem;color:rgba(255,255,255,.8);padding:4px 10px;border-radius:5px;white-space:nowrap;top:50%;left:50%;transform:translate(var(--tx,0),-50%);transition:transform .35s ease}
.delta-l1{background:rgba(40,50,90,.85);top:20%}
.delta-l2{background:rgba(60,80,120,.85);top:38%}
.delta-l3{background:rgba(90,70,40,.9);top:62%}
.delta-l4{background:rgba(160,80,40,.9);top:80%}
.delta-controls{padding:14px 18px;border-top:1px solid var(--border);display:flex;align-items:center;gap:14px;background:var(--bg3)}
.delta-controls label{font-family:'DM Mono',monospace;font-size:.72rem;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.delta-controls input[type=range]{flex:1;accent-color:var(--purple)}
.delta-controls .val{font-family:'DM Mono',monospace;font-size:.78rem;color:var(--purple);min-width:48px;text-align:right}

/* Layer table */
.group-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.82rem}
.group-table th{text-align:left;padding:9px 12px;font-family:'DM Mono',monospace;font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--border)}
.group-table td{padding:8px 12px;border-bottom:1px solid rgba(255,255,255,.04);color:var(--text)}
.group-table td:first-child{font-family:'DM Mono',monospace;color:var(--purple)}
.group-table tr:last-child td{border-bottom:none}

/* -- DOWNLOADS SECTION -- */
.downloads-section{padding:80px 0;background:var(--bg2)}
.downloads-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;margin-top:40px}
.dl-card{background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:22px 24px;display:flex;flex-direction:column;gap:10px;transition:border-color .2s,transform .2s}
.dl-card:hover{transform:translateY(-3px)}
.dl-card-top{display:flex;align-items:center;gap:14px}
.dl-icon{font-size:2rem;flex-shrink:0}
.dl-type-badge{font-family:'DM Mono',monospace;font-size:.6rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:5px}
.dl-title{font-family:'Bebas Neue',cursive;font-size:1.2rem;letter-spacing:.04em;color:white;line-height:1.1}
.dl-desc{font-size:.8rem;color:var(--muted);line-height:1.6;flex:1}
.dl-btn{display:inline-flex;align-items:center;gap:7px;font-size:.8rem;font-weight:700;padding:9px 16px;border-radius:8px;border:none;cursor:pointer;transition:filter .15s;margin-top:4px;text-decoration:none}
.dl-btn:hover{filter:brightness(1.1)}

/* -- SCROLL REVEAL -- */
/* -- FOOTER -- */
.footer-brand{display:flex;flex-direction:column;align-items:center;gap:4px}
.footer-links,.footer-socials{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 18px;font-size:.82rem}
.footer-links a,.footer-socials a{color:var(--muted);transition:color .15s}

/* -- STAGE MOBILE PATCH ------------------------------------- */
@media(max-width:480px){
  .step-body{padding:16px 12px;}
  .code-block pre,pre,code{font-size:.68rem;white-space:pre-wrap;word-break:break-word;}
  .box,.tip-box,.info-box{font-size:.8rem;padding:10px 12px;}
  .downloads-grid{grid-template-columns:1fr !important;}
  .dl-card{padding:16px 14px;}
  .step-nav-btns,.step-nav{gap:8px;}
  .step-nav-btns button,.step-nav button,.btn-step{flex:1;padding:12px 8px;font-size:.82rem;}
  .delta-stage{height:150px !important;}
  .bigidea-grid{grid-template-columns:1fr !important;}
}
@media(max-width:360px){
  .step-btn{font-size:.72rem;padding:7px 10px;}
}
/* ----------------------------------------------------------- */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}.skip-link:focus{left:50%;transform:translateX(-50%);top:8px;width:auto;height:auto;padding:10px 20px;background:#BC4749;color:white;font-weight:700;font-size:.9rem;border-radius:8px;z-index:9999;text-decoration:none;white-space:nowrap}
.reveal{opacity:1!important;transform:none!important}