*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#060c1a;
  --s1:#0b1428;
  --s2:#101d38;
  --s3:#162040;
  --border:rgba(79,142,255,.12);
  --border2:rgba(79,142,255,.22);
  --accent:#4f8eff;
  --accent2:#a855f7;
  --accent3:#06d6a0;
  --accent4:#f59e0b;
  --text:#e2e8f0;
  --muted:#64748b;
  --danger:#ef4444;
  --glow:rgba(79,142,255,.35);
  --glow2:rgba(168,85,247,.3);
  --radius:16px;
  --rsm:10px;
  --rxs:6px;
}

html,body{height:100%;scroll-behavior:smooth}
body{
  font-family:'Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
}

/* ── BG EFFECTS ── */
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(79,142,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(79,142,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 80% 80% at 50% 0%,black 40%,transparent 100%);
}
.bg-orb{position:fixed;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0}
.bg-orb-1{width:700px;height:700px;background:rgba(79,142,255,.07);top:-200px;left:-150px}
.bg-orb-2{width:600px;height:600px;background:rgba(168,85,247,.06);bottom:-100px;right:-100px}
.bg-orb-3{width:300px;height:300px;background:rgba(6,214,160,.04);top:50%;left:40%}
.bg-scan{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.04) 2px,rgba(0,0,0,.04) 4px);
}

/* ── HEADER ── */
header{
  position:relative;z-index:10;
  padding:16px 36px;
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--border);
  background:rgba(11,20,40,.85);
  backdrop-filter:blur(24px);
}
.logo{display:flex;align-items:center;gap:14px}
.logo-icon{
  width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 28px var(--glow);
  animation:logoPulse 4s ease-in-out infinite;
}
@keyframes logoPulse{0%,100%{box-shadow:0 0 28px var(--glow)}50%{box-shadow:0 0 44px var(--glow),0 0 60px var(--glow2)}}
.logo-text{
  font-family:'Space Grotesk',sans-serif;font-size:21px;font-weight:800;
  background:linear-gradient(90deg,#e2e8f0,#4f8eff,#a855f7);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.4px;margin-top:2px}
.header-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* Lang toggle */
.lang-toggle{display:flex;gap:4px}
.lang-btn{
  padding:4px 10px;font-size:11px;font-weight:700;
  border:1px solid var(--border);background:var(--s2);color:var(--muted);
  border-radius:6px;cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif;
}
.lang-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}
.lang-btn:hover:not(.active){border-color:var(--accent);color:var(--accent)}

.hbadge{font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px;letter-spacing:.4px}
.hbadge-blue{background:rgba(79,142,255,.15);border:1px solid rgba(79,142,255,.3);color:var(--accent)}
.hbadge-purple{background:rgba(168,85,247,.15);border:1px solid rgba(168,85,247,.3);color:var(--accent2)}
.hbadge-green{background:rgba(6,214,160,.12);border:1px solid rgba(6,214,160,.3);color:var(--accent3)}
.hbadge-orange{background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.3);color:var(--accent4)}

/* ── LAYOUT ── */
.app-layout{
  position:relative;z-index:5;
  display:flex;
  height:calc(100vh - 73px);
}

/* ── SIDEBAR ── */
.sidebar{
  width:330px;min-width:330px;
  background:var(--s1);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  overflow:hidden;
}
.stabs{display:flex;border-bottom:1px solid var(--border);background:var(--s2)}
.stab{
  flex:1;padding:13px 6px;font-size:11px;font-weight:600;
  border:none;background:none;color:var(--muted);cursor:pointer;
  transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:4px;
  border-bottom:2px solid transparent;
}
.stab-icon{font-size:18px}
.stab:hover{color:var(--text);background:rgba(255,255,255,.02)}
.stab.active{color:var(--accent);border-bottom-color:var(--accent);background:rgba(79,142,255,.06)}
.stabs-content{flex:1;overflow-y:auto;overflow-x:hidden}
.stabs-content::-webkit-scrollbar{width:3px}
.stabs-content::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}
.spanel{display:none;padding:18px;flex-direction:column;gap:14px}
.spanel.active{display:flex}

/* Sidebar footer */
.sidebar-foot{padding:14px 18px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}
.btn-gen{
  width:100%;padding:14px;border:none;border-radius:12px;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;font-size:14px;font-weight:700;font-family:'Inter',sans-serif;
  display:flex;align-items:center;justify-content:center;gap:10px;
  box-shadow:0 4px 20px rgba(79,142,255,.35);
  transition:all .3s;
}
.btn-gen:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 32px rgba(79,142,255,.5)}
.btn-gen:disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn-gen .gen-icon{font-size:18px}
.btn-sec{
  width:100%;padding:10px 14px;border:1px solid var(--border);
  background:var(--s2);color:var(--text);border-radius:8px;cursor:pointer;
  font-size:12px;font-weight:600;font-family:'Inter',sans-serif;
  display:flex;align-items:center;justify-content:center;gap:6px;
  transition:all .2s;
}
.btn-sec:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:rgba(79,142,255,.07)}
.btn-sec:disabled{opacity:.4;cursor:not-allowed}
.act-btn{background:none;border:1px solid var(--border);border-radius:8px;width:100%;padding:10px;font-size:12px;font-weight:600;color:var(--text);cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif;display:flex;align-items:center;justify-content:center;gap:6px}
.act-btn:hover:not(:disabled){border-color:var(--accent2);color:var(--accent2)}
.act-btn:disabled{opacity:.4;cursor:not-allowed}

/* ── SECTION LABELS ── */
.sec-label{
  font-size:10px;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:1.2px;
  display:flex;align-items:center;gap:8px;
}
.sec-label::after{content:'';flex:1;height:1px;background:var(--border)}

/* ── UPLOAD ZONE ── */
.upload-zone{
  border:2px dashed rgba(79,142,255,.3);border-radius:var(--radius);
  padding:36px 20px;text-align:center;cursor:pointer;
  transition:all .3s;background:rgba(11,20,40,.6);
  position:relative;overflow:hidden;
}
.upload-zone:hover,.upload-zone.drag-over{
  border-color:var(--accent);background:rgba(79,142,255,.07);
  box-shadow:0 0 36px rgba(79,142,255,.14);
}
.uz-glow{
  position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 50% 50%,rgba(79,142,255,.06),transparent 70%);
  animation:uzPulse 3s ease-in-out infinite;
}
@keyframes uzPulse{0%,100%{opacity:.5}50%{opacity:1}}
.uz-icon{font-size:46px;margin-bottom:10px;filter:drop-shadow(0 0 18px rgba(79,142,255,.5))}
.uz-title{font-size:15px;font-weight:700;margin-bottom:4px}
.uz-sub{color:var(--muted);font-size:12px;margin-bottom:2px}
.uz-hint{color:var(--muted);font-size:11px;margin-bottom:10px}
.btn-upload{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border:none;border-radius:8px;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;font-size:12px;font-weight:600;font-family:'Inter',sans-serif;
  box-shadow:0 4px 14px rgba(79,142,255,.3);transition:all .3s;
}
.btn-upload:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(79,142,255,.45)}
#fileInput{display:none}

/* File info */
.file-info{display:flex;flex-direction:column;gap:8px}
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.info-chip{
  background:var(--s2);border:1px solid var(--border);border-radius:8px;padding:10px 12px;
}
.info-chip.full{grid-column:1/-1}
.ic-label{font-size:10px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:3px}
.ic-val{font-size:13px;font-weight:600;color:var(--text);word-break:break-all;font-family:'JetBrains Mono',monospace}

/* Thumbnail grid */
.thumb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.thumb-item{
  border-radius:6px;overflow:hidden;cursor:pointer;border:2px solid transparent;
  transition:all .2s;aspect-ratio:1;
}
.thumb-item:hover{border-color:var(--accent)}
.thumb-item.active{border-color:var(--accent2)}
.thumb-item img{width:100%;height:100%;object-fit:cover}

/* Info box */
.info-box{
  display:flex;gap:10px;align-items:flex-start;
  background:rgba(79,142,255,.06);border:1px solid rgba(79,142,255,.18);
  border-radius:10px;padding:12px;font-size:12px;color:var(--muted);line-height:1.5;
}
.ib-icon{font-size:18px;flex-shrink:0}

/* ── CONTROLS ── */
.ctrl-row{display:flex;flex-direction:column;gap:5px}
.ctrl-row label{
  font-size:12px;font-weight:600;color:#94a3b8;
  display:flex;justify-content:space-between;align-items:center;
}
.ctrl-val{color:var(--accent);font-weight:700;font-family:'JetBrains Mono',monospace;font-size:12px}
.ctrl-val.small{font-size:11px}
input[type=range]{
  width:100%;-webkit-appearance:none;height:4px;border-radius:3px;
  background:var(--s3);cursor:pointer;outline:none;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:16px;height:16px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));cursor:pointer;
  box-shadow:0 0 0 3px rgba(79,142,255,.2),0 2px 6px rgba(0,0,0,.4);
  transition:transform .15s;
}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}
input[type=color]{cursor:pointer}

/* ── TOGGLE ── */
.toggle-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border)}
.toggle-row:last-of-type{border-bottom:none}
.tgl-label{font-size:13px;color:var(--text)}
.tgl-label small{display:block;font-size:11px;color:var(--muted);margin-top:1px}
.sw{position:relative;width:40px;height:22px;flex-shrink:0}
.sw input{opacity:0;width:0;height:0}
.sw-track{
  position:absolute;inset:0;background:var(--s3);border-radius:11px;
  cursor:pointer;transition:.3s;border:1px solid var(--border);
}
.sw-track::before{
  content:'';position:absolute;height:16px;width:16px;left:2px;bottom:2px;
  background:#fff;border-radius:50%;transition:.3s;box-shadow:0 1px 4px rgba(0,0,0,.3);
}
input:checked+.sw-track{background:var(--accent);border-color:var(--accent)}
input:checked+.sw-track::before{transform:translateX(18px)}

/* ── MODE CHIPS ── */
.mode-chips{display:flex;flex-wrap:wrap;gap:6px}
.mchip{
  padding:7px 12px;border:1px solid var(--border);border-radius:8px;
  background:var(--s2);color:var(--muted);font-size:12px;font-weight:600;
  cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif;
  display:flex;align-items:center;gap:5px;
}
.mchip:hover{border-color:var(--accent);color:var(--accent);background:rgba(79,142,255,.06)}
.mchip.active{border-color:var(--accent);color:var(--accent);background:rgba(79,142,255,.12)}

/* ── 4D BADGE ── */
.badge-4d{
  display:flex;gap:12px;align-items:flex-start;
  background:linear-gradient(135deg,rgba(168,85,247,.1),rgba(79,142,255,.1));
  border:1px solid rgba(168,85,247,.25);border-radius:12px;padding:14px;
  font-size:12px;
}
.b4d-icon{font-size:24px;flex-shrink:0}
.badge-4d strong{display:block;color:var(--accent2);font-size:13px;margin-bottom:3px}
.badge-4d small{color:var(--muted);font-size:11px;line-height:1.5}

/* Material presets */
.mat-presets{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.matcard{
  background:var(--s2);border:1px solid var(--border);border-radius:10px;
  padding:10px;cursor:pointer;transition:all .2s;text-align:center;
  font-size:11px;color:var(--muted);font-weight:600;
}
.matcard:hover{border-color:var(--accent2);color:var(--text)}
.matcard.active{border-color:var(--accent2);background:rgba(168,85,247,.08);color:var(--accent2)}
.mc-preview{height:28px;border-radius:6px;margin-bottom:6px}

/* ── EXPORT CARDS ── */
.export-cards{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ecard{
  background:var(--s2);border:1px solid var(--border);border-radius:10px;
  padding:12px;cursor:pointer;transition:all .25s;
  display:flex;flex-direction:column;gap:5px;
}
.ecard:hover{border-color:var(--accent2);transform:translateY(-2px);background:rgba(168,85,247,.06)}
.ec-icon{font-size:22px}
.ec-name{font-size:13px;font-weight:700;color:var(--text)}
.ec-desc{font-size:11px;color:var(--muted);line-height:1.4}
.ec-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:4px;display:inline-block;letter-spacing:.4px;margin-top:2px}
.btn-exp{
  flex:1;padding:10px;border:1px solid var(--border);border-radius:8px;
  background:var(--s2);color:var(--text);font-size:12px;font-weight:700;
  cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif;
  display:flex;align-items:center;justify-content:center;gap:6px;
}
.btn-exp:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:rgba(79,142,255,.08)}
.btn-exp:disabled{opacity:.4;cursor:not-allowed}
.btn-exp-4d:hover:not(:disabled){border-color:var(--accent2);color:var(--accent2);background:rgba(168,85,247,.08)}

/* ── PREVIEW AREA ── */
.preview-area{
  flex:1;display:flex;flex-direction:column;
  padding:18px;gap:14px;background:var(--bg);
  height:calc(100vh - 73px);overflow:hidden;
}
.pv-header{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;
}
.pv-title{
  font-family:'Space Grotesk',sans-serif;font-size:17px;font-weight:700;
  display:flex;align-items:center;gap:10px;
}
.pv-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent3);box-shadow:0 0 8px var(--accent3);
  animation:dotBlink 2s ease-in-out infinite;
}
@keyframes dotBlink{0%,100%{opacity:1;box-shadow:0 0 8px var(--accent3)}50%{opacity:.4;box-shadow:none}}
.pv-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.pv-btn{
  padding:7px 12px;border:1px solid var(--border);border-radius:8px;
  background:var(--s2);color:var(--muted);font-size:12px;font-weight:600;
  cursor:pointer;transition:all .2s;font-family:'Inter',sans-serif;
}
.pv-btn:hover{border-color:var(--accent);color:var(--accent)}
.pv-btn.active{background:rgba(79,142,255,.12);border-color:var(--accent);color:var(--accent)}
.zoom-row{display:flex;align-items:center;gap:6px}
.zm-btn{
  width:28px;height:28px;border:1px solid var(--border);border-radius:6px;
  background:var(--s2);color:var(--text);font-size:16px;cursor:pointer;
  font-family:monospace;display:flex;align-items:center;justify-content:center;
  transition:all .2s;
}
.zm-btn:hover{border-color:var(--accent);color:var(--accent)}
.zm-val{font-size:12px;font-weight:600;color:var(--muted);font-family:'JetBrains Mono',monospace;min-width:38px;text-align:center}

/* Preview panels */
.preview-panels{display:flex;gap:14px;flex:1;min-height:0}
.pv-panel{
  flex:1;background:var(--s1);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;min-height:0;
}
.pv-panel-head{
  padding:10px 14px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(255,255,255,.015);flex-shrink:0;
}
.pvh-title{font-size:12px;font-weight:600;color:#94a3b8;display:flex;align-items:center;gap:6px}
.pvh-badge{font-size:10px;padding:2px 7px;border-radius:4px;font-weight:600;background:rgba(100,116,139,.2);color:#94a3b8}
.pv-canvas-wrap{
  flex:1;display:flex;align-items:center;justify-content:center;
  background:repeating-conic-gradient(rgba(255,255,255,.025) 0% 25%,transparent 0% 50%) 0 0/20px 20px;
  min-height:0;overflow:hidden;position:relative;
}
.pv-placeholder{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--muted)}
.pvp-icon{font-size:48px;opacity:.25}
.pv-placeholder p{font-size:13px;text-align:center}
#canvas3D{width:100%;height:100%;display:block;cursor:grab}
#canvas3D:active{cursor:grabbing}

/* Processing overlay */
.proc-overlay{
  position:absolute;inset:0;z-index:20;
  background:rgba(6,12,26,.9);backdrop-filter:blur(6px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.proc-spinner{
  width:52px;height:52px;border-radius:50%;
  border:3px solid rgba(79,142,255,.2);
  border-top-color:var(--accent);border-right-color:var(--accent2);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.proc-text{font-size:14px;font-weight:600;color:var(--text)}
.proc-bar-wrap{width:180px;height:6px;background:var(--s3);border-radius:3px;overflow:hidden}
.proc-bar{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:3px;transition:width .2s}
.proc-pct{font-size:12px;color:var(--muted);font-family:'JetBrains Mono',monospace}

/* Stats bar */
.stats-bar{display:flex;gap:10px;flex-wrap:wrap;flex-shrink:0}
.stat-chip{
  background:var(--s1);border:1px solid var(--border);border-radius:8px;
  padding:10px 14px;display:flex;flex-direction:column;gap:2px;min-width:90px;flex:1;
}
.sc-label{font-size:10px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.8px}
.sc-val{font-size:14px;font-weight:700;color:var(--text);font-family:'JetBrains Mono',monospace}

/* ── TOAST ── */
.toast{
  position:fixed;bottom:24px;right:24px;z-index:9999;
  padding:12px 20px;border-radius:10px;font-size:13px;font-weight:600;
  background:var(--s2);border:1px solid var(--border);color:var(--text);
  box-shadow:0 8px 32px rgba(0,0,0,.5);
  transform:translateY(80px);opacity:0;
  transition:all .35s cubic-bezier(.175,.885,.32,1.275);
  pointer-events:none;max-width:340px;
}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{border-color:var(--accent3);color:var(--accent3)}
.toast.error{border-color:var(--danger);color:var(--danger)}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px}

/* Responsive */
@media(max-width:900px){
  .sidebar{width:280px;min-width:280px}
  header{padding:12px 20px}
  .logo-text{font-size:17px}
  .hbadge{display:none}
}
@media(max-width:640px){
  .app-layout{flex-direction:column}
  .sidebar{width:100%;min-width:100%;height:50vh}
  .preview-area{height:50vh}
}