*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1117;--surface:#1a1d27;--surface2:#22263a;--border:#2e3348;
  --accent:#6c63ff;--accent2:#a78bfa;--text:#e8eaf6;--muted:#7b7f9e;
  --success:#4caf82;--error:#f06060;--radius:14px;
}
html,body{height:100%;font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);overflow:hidden}

/* ─── ENTRY ─── */
#entry{
  position:fixed;inset:0;overflow-y:auto;
  background:linear-gradient(135deg,#0d0d1a 0%,#1a1a3a 100%);
  z-index:10;
}
.entry-inner{max-width:900px;margin:0 auto;padding:40px 24px}
#entry h1{font-size:2.4rem;font-weight:800;text-align:center;margin-bottom:.4rem}
#entry h1 span{background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
#entry>div>p{text-align:center;color:var(--muted);margin-bottom:2rem;font-size:1.05rem}

/* DROP ZONE */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--surface);
  padding:40px 20px;text-align:center;cursor:pointer;transition:all .3s;margin-bottom:40px}
.drop-zone:hover,.drop-zone.drag{border-color:var(--accent);background:var(--surface2)}
.dz-icon{font-size:52px;margin-bottom:12px}
.drop-zone h3{font-size:1.2rem;margin-bottom:.4rem}
.drop-zone p{color:var(--muted);font-size:.9rem;margin-bottom:1rem}
.formats{display:flex;justify-content:center;gap:8px;margin-bottom:1.2rem;flex-wrap:wrap}
.fmt{background:var(--surface2);border:1px solid var(--border);padding:5px 12px;border-radius:20px;font-size:11px;font-weight:700;color:var(--accent2)}
.dz-note{font-size:.8rem;color:var(--muted);margin-top:.8rem}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:10px;border:none;cursor:pointer;font-weight:600;font-size:14px;transition:all .2s;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(108,99,255,.4)}

/* GALLERY */
.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.section-header h2{font-size:1.2rem;font-weight:700}
#model-count{color:var(--muted);font-size:.85rem}
#gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.empty-state{grid-column:1/-1;text-align:center;padding:40px;color:var(--muted);
  background:var(--surface);border-radius:var(--radius);border:1px dashed var(--border)}
.empty-state span{font-size:40px;display:block;margin-bottom:10px}
.model-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px;cursor:pointer;transition:all .25s;position:relative}
.model-card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 8px 24px rgba(0,0,0,.4)}
.card-thumb{height:110px;background:linear-gradient(135deg,#2a2e44,#1a1d27);border-radius:10px;
  display:flex;align-items:center;justify-content:center;font-size:40px;margin-bottom:10px}
.card-name{font-weight:600;font-size:.85rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-meta{font-size:.75rem;color:var(--muted);display:flex;justify-content:space-between}
.card-del{position:absolute;top:8px;right:8px;background:rgba(240,96,96,.15);color:var(--error);
  border:none;width:26px;height:26px;border-radius:50%;cursor:pointer;opacity:0;transition:.2s;font-size:13px}
.model-card:hover .card-del{opacity:1}
.card-del:hover{background:var(--error);color:#fff}

/* ─── VIEWER ─── */
#viewer{position:fixed;inset:0;display:none;background:#0d0d1a}
#viewer-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}

/* TOP BAR */
#topbar{position:absolute;top:0;left:0;right:0;height:50px;
  background:rgba(13,13,26,.9);backdrop-filter:blur(10px);
  display:flex;align-items:center;padding:0 1rem;gap:.6rem;z-index:10;
  border-bottom:1px solid rgba(108,99,255,.2)}
#topbar h2{font-size:.95rem;font-weight:700;background:linear-gradient(90deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}
#model-name{color:var(--muted);font-size:.8rem;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.spacer{flex:1}
.tb-btn{padding:.3rem .8rem;border-radius:16px;border:1px solid rgba(108,99,255,.35);
  background:rgba(108,99,255,.1);color:#c0c0e0;font-size:.78rem;cursor:pointer;transition:all .2s;white-space:nowrap;font-family:inherit}
.tb-btn:hover{background:rgba(108,99,255,.3);color:#fff}
.tb-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* SIDE PANEL */
#panel{position:absolute;top:50px;right:0;bottom:0;width:270px;
  background:rgba(13,13,26,.95);backdrop-filter:blur(10px);
  border-left:1px solid rgba(108,99,255,.2);overflow-y:auto;
  transform:translateX(100%);transition:transform .3s;z-index:9;padding:.5rem}
#panel.open{transform:translateX(0)}
.panel-section{margin-bottom:.8rem;background:rgba(108,99,255,.06);
  border-radius:10px;padding:.7rem;border:1px solid rgba(108,99,255,.12)}
.panel-section h3{font-size:.78rem;color:var(--accent2);margin-bottom:.6rem;font-weight:600}
.ctrl-row{display:flex;align-items:center;gap:.5rem;margin-bottom:.4rem;font-size:.78rem;color:#bbb}
.ctrl-row span:first-child{flex:1;min-width:70px}
.ctrl-row input[type=range]{flex:2}
.ctrl-row .val{width:34px;text-align:right;color:var(--accent2);font-size:.75rem}
.model-item{display:flex;align-items:center;gap:.4rem;padding:.4rem .5rem;border-radius:7px;
  background:rgba(108,99,255,.07);cursor:pointer;transition:background .2s;font-size:.75rem;color:#ccc;margin-bottom:.3rem}
.model-item:hover{background:rgba(108,99,255,.2)}
.model-item.active{background:rgba(108,99,255,.3);color:#fff}
.model-item .del{margin-left:auto;color:var(--error);font-size:.85rem;padding:0 .25rem;cursor:pointer}

/* LOADER */
#loader-overlay{position:fixed;inset:0;background:rgba(13,13,26,.95);z-index:200;
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:1rem}
#loader-overlay.active{display:flex}
.loader-spinner{width:56px;height:56px;border:4px solid rgba(108,99,255,.2);
  border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#loader-title{font-size:1rem;color:#c0c0e0}
#loader-file{font-size:.82rem;color:var(--muted);max-width:300px;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.progress-track{width:300px;height:7px;background:rgba(255,255,255,.08);border-radius:4px;overflow:hidden}
#progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:4px;transition:width .2s}
#loader-percent{font-size:.85rem;color:var(--accent);font-weight:600}

/* TOAST */
#toast-container{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);
  z-index:300;display:flex;flex-direction:column;gap:.4rem;align-items:center}
.toast{padding:.5rem 1.2rem;border-radius:18px;font-size:.82rem;color:#fff;
  background:rgba(40,40,70,.97);border:1px solid rgba(108,99,255,.3);transition:opacity .3s}
.toast.error{border-color:var(--error)}
.toast.success{border-color:var(--success)}