/* -- JVDS Site Nav -- */

: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;
  --green:#3ddc84;
  --teal:#70A3A7;
  --rose:#BC4749;
  --accent:#e8312b;--accent2:#f5635e;
  --pink:#ff70b8;--yellow:#f5a623;
  --asphalt:#2a2730;--xp-gold:#f5a623;--xp-glow:rgba(245,166,35,.3);
  --card:#18181d;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
code,pre{font-family:'DM Mono',monospace}

/* -- HERO -- */
.hero{
  position:relative;overflow:hidden;
  min-height:88vh;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-red{position:absolute;top:-200px;right:-100px;width:600px;height:600px;background:radial-gradient(ellipse,rgba(232,49,43,.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:1fr 1fr;gap:60px;align-items:center;position:relative;z-index:2}
@media(max-width:760px){.hero-inner{grid-template-columns:1fr;gap:40px}}
.hero-kicker{font-family:'DM Mono',monospace;font-size:.7rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--red-lt);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.hero-kicker::before{content:'';width:24px;height:2px;background:var(--red)}
.hero-title{font-family:'Bebas Neue',cursive;font-size:clamp(3.5rem,8vw,6.5rem);line-height:.95;letter-spacing:.02em;margin-bottom:20px}
.hero-title .accent{color:var(--red)}
.hero-title .dim{color:rgba(228,224,216,.35);font-size:.55em}
.hero-sub{font-size:1rem;color:var(--muted);line-height:1.75;margin-bottom:32px;max-width:460px}
.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.red{border-color:rgba(232,49,43,.3);color:var(--red-lt);background:rgba(232,49,43,.08)}
.hero-pill.gold{border-color:rgba(245,166,35,.3);color:var(--gold-lt);background:rgba(245,166,35,.08)}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap}
.btn-red{display:inline-flex;align-items:center;gap:8px;background:var(--red);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(--red-dk),0 8px 32px rgba(232,49,43,.3);transition:transform .12s,filter .15s}
.btn-red:hover{filter:brightness(1.12);transform:translateY(-2px)}
.btn-outline{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--text);font-family:'Bebas Neue',cursive;font-size:1.1rem;letter-spacing:.08em;padding:12px 24px;border-radius:10px;border:1.5px solid rgba(255,255,255,.15);transition:border-color .2s,background .2s}
.btn-outline:hover{border-color:rgba(255,255,255,.35);background:rgba(255,255,255,.04)}

/* Hero VS panel */
.hero-vs{position:relative;display:flex;flex-direction:column;gap:12px}
.vs-badge{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:3;font-family:'Bebas Neue',cursive;font-size:2.8rem;color:var(--gold);text-shadow:0 0 40px rgba(245,166,35,.6);letter-spacing:.1em}
.file-card{background:var(--bg3);border:1px solid var(--border);border-radius:12px;padding:14px 18px;display:flex;align-items:center;gap:14px;transition:border-color .2s}
.file-card:hover{border-color:rgba(255,255,255,.15)}
.file-ext{font-family:'Bebas Neue',cursive;font-size:1rem;letter-spacing:.1em;width:48px;text-align:center;padding:6px 0;border-radius:6px;flex-shrink:0}
.ext-def{background:rgba(155,107,255,.15);color:var(--purple);border:1px solid rgba(155,107,255,.2)}
.ext-sff{background:rgba(74,158,255,.15);color:var(--blue-lt);border:1px solid rgba(74,158,255,.2)}
.ext-air{background:rgba(245,166,35,.15);color:var(--gold-lt);border:1px solid rgba(245,166,35,.2)}
.ext-cmd{background:rgba(61,220,132,.15);color:var(--green);border:1px solid rgba(61,220,132,.2)}
.ext-cns{background:rgba(232,49,43,.15);color:var(--red-lt);border:1px solid rgba(232,49,43,.2)}
.ext-snd{background:rgba(112,163,167,.15);color:var(--teal);border:1px solid rgba(112,163,167,.2)}
.file-info-name{font-family:'DM Mono',monospace;font-size:.78rem;font-weight:500;color:var(--text)}
.file-info-desc{font-size:.72rem;color:var(--muted);margin-top:2px}

/* -- 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}
.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:540px}

/* -- COURSE SECTIONS -- */
.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:16px 0;display:flex;flex-wrap:wrap;gap:4px;padding:12px}}
.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}
.step-btn.active .step-num{background:currentColor;border-color:currentColor;color:var(--bg)}
.step-btn.done .step-num::after{content:'?';font-family:'DM Sans',sans-serif;font-size:.7rem;font-weight:700}
@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:420px}
@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}
.step-title{font-family:'Bebas Neue',cursive;font-size:1.8rem;letter-spacing:.04em;color:white;margin-bottom:12px;line-height:1.1}
.step-body{font-size:.9rem;color:var(--muted);line-height:1.75}
.step-body p{margin-bottom:10px}
.step-body strong{color:var(--text);font-weight:600}
.step-body ul{padding-left:18px;margin-bottom:10px}
.step-body li{margin-bottom:5px}
.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:10px;background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:.85rem;color:var(--text)}
.step-list li::before{content:attr(data-n);font-family:'Bebas Neue',cursive;font-size:.9rem;letter-spacing:.05em;color:var(--muted);min-width:18px;padding-top:1px}
.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:1.65;color:#a8c8ff}
.code-block .comment{color:#505060}
.code-block .key{color:var(--gold-lt)}
.code-block .val{color:var(--green)}
.tip-box{background:rgba(245,166,35,.07);border:1px solid rgba(245,166,35,.2);border-radius:10px;padding:12px 16px;margin:12px 0;font-size:.82rem;color:rgba(228,224,216,.75);display:flex;gap:10px}
.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:12px 0;font-size:.82rem;color:rgba(228,224,216,.75);display:flex;gap:10px}
.warn-box::before{content:'⚠️';flex-shrink:0}
.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}
.btn-step-prev{background:rgba(255,255,255,.06);color:var(--muted)}
.btn-step-prev:hover{background:rgba(255,255,255,.1);color:var(--text)}
.btn-step-next{background:var(--red);color:white;box-shadow:0 3px 0 var(--red-dk)}
.btn-step-next:hover{filter:brightness(1.1)}
.btn-step:disabled{opacity:.3;cursor:default}

/* Clsn diagram */
.clsn-diagram{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
@media(max-width:500px){.clsn-diagram{grid-template-columns:1fr}}
.clsn-box{border-radius:10px;padding:14px 16px}
.clsn2{background:rgba(74,158,255,.08);border:2px solid rgba(74,158,255,.35)}
.clsn1{background:rgba(232,49,43,.08);border:2px solid rgba(232,49,43,.35)}
.clsn-title{font-family:'Bebas Neue',cursive;font-size:1.1rem;letter-spacing:.06em;margin-bottom:4px}
.clsn2 .clsn-title{color:var(--blue-lt)}
.clsn1 .clsn-title{color:var(--red-lt)}
.clsn-desc{font-size:.78rem;color:var(--muted);line-height:1.5}

/* Group table */
.group-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.8rem}
.group-table th{text-align:left;padding:8px 10px;font-family:'DM Mono',monospace;font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--border)}
.group-table td{padding:7px 10px;border-bottom:1px solid rgba(255,255,255,.04)}
.group-table td:first-child{font-family:'DM Mono',monospace;color:var(--gold-lt)}
.group-table tr:last-child td{border-bottom:none}

/* -- STAGE SECTION -- */
.stage-section{padding:80px 0;border-bottom:1px solid var(--border);background:var(--bg2)}
.parallax-demo{margin:32px 0;background:var(--bg);border:1px solid var(--border);border-radius:16px;overflow:hidden}
.parallax-layers{display:flex;flex-direction:column;gap:0}
.layer-row{display:flex;align-items:center;gap:0;border-bottom:1px solid var(--border)}
.layer-row:last-child{border-bottom:none}
.layer-depth{width:120px;flex-shrink:0;padding:14px 16px;font-family:'DM Mono',monospace;font-size:.72rem;color:var(--muted);border-right:1px solid var(--border)}
.layer-bar-wrap{flex:1;padding:10px 16px}
.layer-bar{height:24px;border-radius:6px;display:flex;align-items:center;padding:0 10px;font-family:'DM Mono',monospace;font-size:.68rem;font-weight:500;color:rgba(0,0,0,.7);transition:width .3s}
.layer-desc{width:180px;flex-shrink:0;padding:14px 16px;font-size:.78rem;color:var(--muted);border-left:1px solid var(--border)}
@media(max-width:600px){.layer-depth,.layer-desc{display:none}}

/* -- DOWNLOADS SECTION -- */
.downloads-section{padding:80px 0}
.downloads-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;margin-top:40px}
.dl-card{background:var(--bg2);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}
.dl-btn:hover{filter:brightness(1.1)}

/* -- SCROLL REVEAL -- */
/* -- FOOTER -- */
footer{background:var(--bg2);border-top:1px solid var(--border);padding:28px 24px;text-align:center;color:var(--muted);font-size:.8rem}
footer a{color:var(--muted);transition:color .15s}
footer a:hover{color:var(--text)}

/* -- MOBILE RESPONSIVE PATCH ---------------------------- */
@media(max-width:480px){
  pre,code,.code-block,.code-pre{font-size:.68rem;white-space:pre-wrap;word-break:break-word;overflow-x:auto;}
  table{font-size:.75rem;display:block;overflow-x:auto;}
  img{max-width:100%;height:auto;}
  .tip-box,.info-box,.box{font-size:.8rem;padding:10px 12px;}
}
/* ------------------------------------------------------- */


/* -- MUGEN MOBILE PATCH ------------------------------------- */
@media(max-width:480px){
  .step-body,.lesson-body{padding:16px 12px;}
  pre,code,.code-block{font-size:.68rem;white-space:pre-wrap;word-break:break-word;overflow-x:auto;}
  .box,.tip-box,.callout{font-size:.8rem;padding:10px 12px;}
  .dl-grid,.downloads-grid{grid-template-columns:1fr !important;}
  .dl-card{padding:14px 12px;}
  .step-nav button,.btn-step,.nav-btn{flex:1;padding:12px 8px;font-size:.82rem;}
  .step-nav,.step-nav-btns{gap:8px;}
  .tab-pills{flex-wrap:wrap;gap:4px;}
  .tab-pill{font-size:.7rem;padding:6px 10px;}
  img{max-width:100%;height:auto;}
}
@media(max-width:360px){
  .step-btn{font-size:.72rem;padding:7px 10px;}
  .course-sidebar a,.course-nav a{font-size:.72rem;}
}
/* ----------------------------------------------------------- */
.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}