:root {
  --bg:#0f0d0a;--bg2:#1a1610;--bg3:#241e14;
  --border:rgba(255,255,255,.07);
  --text:#e8dcc0;--muted:rgba(232,220,192,.45);
  --acc:#c9a84c;--acc-lt:#e8c85e;--acc-dk:#8b7355;
  --stone:#6b5a40;--green:#4ade80;--blue:#38bdf8;--red:#f87171;
}
html,body{height:100%;font-family:'Nunito',sans-serif;background:var(--bg);color:var(--text);overflow:hidden}

/* -- APP GRID -- */
#app{display:grid;grid-template-columns:340px 1fr 240px;grid-template-rows:54px auto 1fr;height:100vh}
.lumo-builder-bar{grid-column:1/-1;grid-row:2}
#sidebar{grid-column:1;grid-row:3}
#viewport{grid-column:2;grid-row:3}
#rightbar{grid-column:3;grid-row:3}

/* -- HEADER -- */
.hdr{grid-column:1/-1;background:rgba(15,13,10,.97);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 18px;z-index:90;position:relative}
.hdr::after{content:'';position:absolute;bottom:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(201,168,76,.4),transparent)}
.logo{font-family:'Bebas Neue',sans-serif;font-size:1.15rem;letter-spacing:.06em;display:flex;align-items:center;gap:8px}
.hdr-right{display:flex;align-items:center;gap:10px}
.quick-btn{background:linear-gradient(135deg,var(--acc),#8b7355);color:#fff;font-family:'Bebas Neue',sans-serif;font-size:.88rem;letter-spacing:.08em;padding:7px 16px;border-radius:8px;border:none;cursor:pointer;box-shadow:0 3px 0 #5a4a2e;transition:filter .15s,transform .1s}
.quick-btn:hover{filter:brightness(1.15);transform:translateY(-1px)}
.back-link{font-family:'JetBrains Mono',monospace;font-size:.6rem;color:var(--muted);padding:5px 12px;border:1px solid var(--border);border-radius:6px;text-decoration:none;transition:color .15s,border-color .15s}
.back-link:hover{color:var(--text);border-color:rgba(255,255,255,.2)}

/* -- SIDEBAR -- */
#sidebar{background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}

/* Progress */
.prog-section{padding:9px 12px 7px;border-bottom:1px solid var(--border);flex-shrink:0}
.prog-lbl{font-family:'JetBrains Mono',monospace;font-size:.52rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--acc)}
.prog-track{width:100%;height:4px;background:rgba(255,255,255,.07);border-radius:999px;margin-top:5px;overflow:hidden}
.prog-fill{height:100%;background:linear-gradient(90deg,var(--acc),var(--acc-lt));border-radius:999px;transition:width .4s ease}
.prog-ct{font-family:'JetBrains Mono',monospace;font-size:.52rem;color:var(--muted);margin-top:3px}

/* Step list */
.slist{flex:1;overflow-y:auto;padding:4px 6px;min-height:0;scrollbar-width:thin;scrollbar-color:var(--acc-dk) transparent}
.slist::-webkit-scrollbar{width:3px}
.slist::-webkit-scrollbar-thumb{background:var(--acc-dk);border-radius:2px}
.si{padding:7px 9px;margin-bottom:2px;border-radius:5px;cursor:pointer;display:flex;align-items:center;gap:8px;border:1px solid transparent;transition:all .18s}
.si:hover{background:rgba(201,168,76,.04)}
.si.active{background:rgba(201,168,76,.1);border-color:var(--acc)}
.si.done{opacity:.55}
.si.done .sn{background:var(--acc);color:#fff;border-color:var(--acc)}
.sn{width:22px;height:22px;border-radius:50%;border:1.5px solid rgba(201,168,76,.45);display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:9px;flex-shrink:0;color:var(--acc-lt);transition:all .2s}
.sl{font-size:11.5px;color:var(--text);line-height:1.2}
.si.active .sl{color:var(--acc-lt)}

/* Controls panel */
.cpan{padding:10px 12px 14px;border-top:1px solid var(--border);background:rgba(0,0,0,.12);overflow-y:auto;flex-shrink:0;max-height:48vh;scrollbar-width:thin;scrollbar-color:var(--acc-dk) transparent}
.cpan::-webkit-scrollbar{width:3px}
.cpan::-webkit-scrollbar-thumb{background:var(--acc-dk);border-radius:2px}

/* Sidebar nav */
.snav{display:flex;gap:6px;padding:8px 10px;border-top:1px solid var(--border);flex-shrink:0}
.snav button{flex:1;padding:8px;border-radius:7px;font-size:.8rem;font-weight:800;cursor:pointer;border:none;transition:background .15s;font-family:'Nunito',sans-serif}
.btn-p{background:rgba(255,255,255,.05);color:var(--muted);border:1px solid var(--border) !important}
.btn-n{background:rgba(201,168,76,.14);color:var(--acc-lt);border:1px solid rgba(201,168,76,.25) !important}
.btn-p:hover:not(:disabled){background:rgba(255,255,255,.1);color:var(--text)}
.btn-n:hover:not(:disabled){background:rgba(201,168,76,.24)}
.btn-p:disabled,.btn-n:disabled{opacity:.28;cursor:default}

/* -- VIEWPORT -- */
#viewport{position:relative;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}
.scene-top{padding:8px 13px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.scene-top-l{font-family:'JetBrains Mono',monospace;font-size:.58rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.scene-top-r{display:flex;align-items:center;gap:7px}
.live-wrap{display:flex;align-items:center;gap:4px;font-family:'JetBrains Mono',monospace;font-size:.56rem;color:var(--acc-lt)}
.live-dot{width:5px;height:5px;border-radius:50%;background:var(--acc);animation:blink 1.8s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.14}}
.scene-wrap{flex:1;position:relative;overflow:hidden}
#castleCanvas{display:block;width:100%;height:100%;touch-action:none}
.vhint{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);font-family:'JetBrains Mono',monospace;font-size:.5rem;color:var(--muted);background:rgba(0,0,0,.5);padding:3px 10px;border-radius:6px;pointer-events:none;white-space:nowrap}
.dims{position:absolute;top:10px;right:10px;background:rgba(15,13,10,.88);border:1px solid rgba(201,168,76,.22);border-radius:6px;padding:7px 11px;font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--muted);z-index:5;line-height:1.8}
.dims span{color:var(--acc-lt)}
.obar{padding:5px 12px;border-top:1px solid var(--border);font-family:'JetBrains Mono',monospace;font-size:.58rem;color:var(--acc-lt);flex-shrink:0;min-height:26px}

/* -- STEP CONTENT STYLES -- */
.step-tag{font-family:'JetBrains Mono',monospace;font-size:.56rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--acc-lt);margin-bottom:3px}
.step-title{font-family:'Bebas Neue',sans-serif;font-size:1.55rem;letter-spacing:.04em;color:#fff;margin-bottom:5px;line-height:1}
.step-intro{font-size:.78rem;color:var(--muted);line-height:1.72;margin-bottom:9px}
.step-intro strong{color:var(--text)}

.box{border-radius:7px;padding:8px 11px;margin:5px 0;font-size:.72rem;line-height:1.55;display:flex;gap:7px;align-items:flex-start}
.box::before{flex-shrink:0;margin-top:1px}
.box-c{background:rgba(201,168,76,.05);border:1px solid rgba(201,168,76,.16);color:rgba(232,220,192,.7)}
.box-c::before{content:"💡"}
.box-t{background:rgba(74,222,128,.05);border:1px solid rgba(74,222,128,.14);color:rgba(232,220,192,.7)}
.box-t::before{content:"✅"}
.box-r{background:rgba(248,113,113,.05);border:1px solid rgba(248,113,113,.18);color:rgba(232,220,192,.8)}
.box-r::before{content:"📊"}

.opt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:7px;margin:8px 0}
.opt-btn{padding:9px 7px;border-radius:8px;border:2px solid var(--border);background:var(--bg3);cursor:pointer;font-family:'Nunito',sans-serif;font-size:.74rem;font-weight:700;color:var(--muted);text-align:center;transition:all .15s;line-height:1.3}
.opt-btn:hover{border-color:rgba(201,168,76,.4);color:var(--text);background:rgba(201,168,76,.05)}
.opt-btn.sel{border-color:var(--acc);color:var(--acc-lt);background:rgba(201,168,76,.08)}
.opt-icon{font-size:1.3rem;display:block;margin-bottom:3px}

.swatch-row{display:flex;gap:6px;flex-wrap:wrap;margin:7px 0}
.swatch{width:28px;height:28px;border-radius:6px;cursor:pointer;border:2px solid transparent;transition:transform .12s,border-color .12s;flex-shrink:0}
.swatch:hover{transform:scale(1.15)}
.swatch.sel{border-color:#fff;transform:scale(1.18)}
.custom-colour{display:flex;align-items:center;gap:7px;margin-top:5px;font-size:.72rem;color:var(--muted)}
.custom-colour input[type=color]{width:32px;height:32px;border:2px solid var(--border);border-radius:6px;cursor:pointer;padding:2px;background:var(--bg2)}

.slider-row{display:flex;align-items:center;gap:9px;padding:6px 0;border-bottom:1px solid rgba(255,255,255,.04)}
.slider-row:last-child{border:none}
.slider-lbl{font-family:'JetBrains Mono',monospace;font-size:.58rem;color:var(--muted);flex:1;text-transform:uppercase;letter-spacing:.05em}
.slider-val{font-family:'JetBrains Mono',monospace;font-size:.68rem;color:var(--acc-lt);min-width:36px;text-align:right}
input[type=range]{flex:2;accent-color:var(--acc);cursor:pointer}

.task-list{margin:6px 0;display:flex;flex-direction:column;gap:3px}
.task-item{display:flex;align-items:center;gap:6px;font-size:.7rem;padding:4px 8px;border-radius:5px;background:rgba(255,255,255,.03);border:1px solid var(--border);color:var(--muted);transition:all .3s}
.task-item.done{background:rgba(74,222,128,.05);border-color:rgba(74,222,128,.18);color:var(--green)}
.task-dot{width:6px;height:6px;border-radius:50%;border:1.5px solid currentColor;flex-shrink:0;transition:background .3s}
.task-item.done .task-dot{background:var(--green)}

.name-input{width:100%;background:var(--bg3);border:1px solid rgba(201,168,76,.3);border-radius:7px;color:var(--acc-lt);font-family:'Bebas Neue',sans-serif;font-size:1.1rem;letter-spacing:.08em;padding:8px 12px;outline:none;transition:border-color .2s;margin:7px 0}
.name-input:focus{border-color:var(--acc);box-shadow:0 0 0 2px rgba(201,168,76,.12)}
.name-input::placeholder{color:var(--muted);font-size:.95rem}

.run-btn{width:100%;margin-top:8px;padding:10px;background:var(--acc);color:#fff;font-family:'Bebas Neue',sans-serif;font-size:.9rem;letter-spacing:.1em;border:none;border-radius:8px;cursor:pointer;box-shadow:0 3px 0 var(--acc-dk);transition:transform .1s,filter .15s;display:flex;align-items:center;justify-content:center;gap:5px}
.run-btn:hover{filter:brightness(1.13);transform:translateY(-1px)}

/* -- RIGHT BAR -- */
#rightbar{background:var(--bg2);border-left:1px solid var(--border);overflow-y:auto;padding:8px 7px;display:flex;flex-direction:column;gap:6px;scrollbar-width:thin;scrollbar-color:var(--acc-dk) transparent}
#rightbar::-webkit-scrollbar{width:3px}
#rightbar::-webkit-scrollbar-thumb{background:var(--acc-dk);border-radius:2px}
.rb-section{background:rgba(0,0,0,.15);border:1px solid var(--border);border-radius:8px;padding:7px 9px}
.rb-title{font-family:'JetBrains Mono',monospace;font-size:.52rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--acc);margin-bottom:5px;padding-bottom:4px;border-bottom:1px solid rgba(201,168,76,.14)}
.rb-row{display:flex;align-items:center;gap:5px;padding:2px 0;min-height:24px}
.rb-row label{font-family:'JetBrains Mono',monospace;font-size:.5rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);flex-shrink:0;width:48px}
.rb-row input[type=color]{width:26px;height:22px;border:1px solid var(--border);border-radius:4px;cursor:pointer;padding:1px;background:var(--bg2);flex-shrink:0}
.rb-row input[type=range]{flex:1;accent-color:var(--acc);min-width:0;height:16px;cursor:pointer}
.rb-row select{flex:1;background:var(--bg3);color:var(--text);border:1px solid var(--border);border-radius:4px;font-size:.62rem;padding:2px 3px;cursor:pointer;font-family:'Nunito',sans-serif;min-width:0}
.rv{font-family:'JetBrains Mono',monospace;font-size:.56rem;color:var(--acc-lt);min-width:28px;text-align:right;flex-shrink:0}
.rb-toggle{display:flex;align-items:center;gap:6px;padding:2px 0;cursor:pointer;font-family:'JetBrains Mono',monospace;font-size:.52rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.rb-toggle input[type=checkbox]{accent-color:var(--acc);flex-shrink:0;width:13px;height:13px}
.preset-btn{background:rgba(255,255,255,.05);border:1px solid var(--border);color:var(--muted);font-family:'Nunito',sans-serif;font-size:.6rem;font-weight:700;padding:5px 3px;border-radius:6px;cursor:pointer;transition:all .15s;text-align:center;width:100%}
.preset-btn:hover{background:rgba(201,168,76,.1);border-color:rgba(201,168,76,.35);color:var(--text)}

/* Stats overlay */
.castle-stats{position:absolute;top:10px;left:10px;background:rgba(15,13,10,.88);border:1px solid rgba(201,168,76,.22);border-radius:6px;padding:7px 11px;font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--muted);z-index:5;line-height:1.8;min-width:130px}
.castle-stats .stat-title{font-size:8px;color:var(--acc);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:3px;border-bottom:1px solid rgba(201,168,76,.15);padding-bottom:2px}
.castle-stats .stat-row{display:flex;align-items:center;gap:4px;margin:2px 0}
.castle-stats .stat-lbl{width:48px;flex-shrink:0;font-size:8px}
.castle-stats .stat-track{flex:1;height:3px;background:rgba(255,255,255,.08);border-radius:2px;overflow:hidden}
.castle-stats .stat-fill{height:100%;border-radius:2px;transition:width .5s cubic-bezier(.34,1.56,.64,1)}
.castle-stats .stat-val{min-width:16px;text-align:right;color:var(--acc-lt);font-size:8px}

/* -- MOBILE -- */
@media(max-width:860px){
  html,body{overflow:auto;height:auto}
  #app{grid-template-columns:1fr;grid-template-rows:54px auto auto;height:auto;min-height:100vh}
  .lumo-builder-bar,#sidebar,#viewport,#rightbar{grid-column:1;grid-row:auto}
  .hdr{grid-column:1}
  #sidebar{max-height:55vh;border-right:none;border-bottom:1px solid var(--border)}
  .slist{min-height:60px}
  .cpan{max-height:36vh}
  #viewport{min-height:320px;height:56vw;max-height:520px}
  #rightbar{display:flex;border-left:none;border-top:1px solid var(--border);padding:6px 10px;flex-direction:row;flex-wrap:wrap;gap:8px;overflow-x:auto;overflow-y:visible;max-height:none}
  .rb-section{flex:1 1 140px;min-width:130px;max-width:200px}
  .rb-row input[type=color]{width:32px;height:28px;min-height:28px}
}
@media(max-width:480px){
  .logo{font-size:1rem}
  .quick-btn{font-size:.78rem;padding:6px 12px}
  #rightbar{padding:6px 8px;gap:6px}
  .rb-section{flex:1 1 100%;max-width:none}
  .rb-row input[type=color]{width:36px;height:32px;min-height:32px}
  #viewport{min-height:260px;height:50vw;max-height:420px}
  .cpan{max-height:40vh}
  .snav button{padding:10px 6px;font-size:.75rem}
}
.reveal{opacity:1!important;transform:none!important}