:root{
  --bg:#0b0c0f; --panel:#141619; --panel2:#1b1e23; --line:#262a31;
  --tx:#e8eaed; --tx2:#9aa2ad; --acc:#5b8cff; --acc2:#7aa2ff; --ok:#39d98a; --warn:#ffb020;
  --r:12px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--tx);
  font:14px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif;
  overflow:hidden}
.hidden{display:none !important}

.topbar{height:52px;display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;border-bottom:1px solid var(--line);background:var(--panel)}
.brand{font-weight:650;letter-spacing:-.01em;display:flex;align-items:center;gap:8px}
.logo{font-size:18px}
.top-actions{display:flex;gap:8px}

#app{display:grid;grid-template-columns:340px 1fr;height:calc(100% - 52px)}

/* ---------- sidebar ---------- */
.sidebar{overflow-y:auto;border-right:1px solid var(--line);padding:14px;background:var(--bg)}
.sidebar::-webkit-scrollbar{width:10px}
.sidebar::-webkit-scrollbar-thumb{background:#2b3038;border-radius:8px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:14px;margin-bottom:12px}
.card h3{margin:0 0 12px;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--tx2);font-weight:600}

label{display:block;font-size:12px;color:var(--tx2);margin-bottom:10px}
label b{color:var(--tx);float:right;font-weight:600}
.rowfull{display:block}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
input[type=number],input[type=text],select{
  width:100%;margin-top:5px;background:var(--panel2);color:var(--tx);
  border:1px solid var(--line);border-radius:8px;padding:8px 9px;font-size:13px;outline:none}
input[type=number]:focus,input[type=text]:focus,select:focus{border-color:var(--acc)}
textarea{width:100%;margin-top:5px;background:var(--panel2);color:var(--tx);border:1px solid var(--line);
  border-radius:8px;padding:8px 9px;font:inherit;font-size:13px;outline:none;resize:vertical;min-height:52px}
textarea:focus{border-color:var(--acc)}
.swatches{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-bottom:11px}
.swatch{height:26px;padding:0;border-radius:7px;border:1px solid #33383f}
.swatch:hover{border-color:var(--acc);transform:translateY(-1px)}
input[type=color]{width:100%;height:34px;margin-top:5px;background:var(--panel2);
  border:1px solid var(--line);border-radius:8px;padding:2px;cursor:pointer}
input[type=range]{width:100%;margin-top:8px;accent-color:var(--acc)}
.check{display:flex;align-items:center;gap:8px;color:var(--tx);margin-top:2px}
.check input{accent-color:var(--acc);width:15px;height:15px}

button{font:inherit;cursor:pointer;border-radius:9px;border:1px solid var(--line);
  background:var(--panel2);color:var(--tx);padding:9px 12px;transition:.15s}
button:hover:not(:disabled){background:#242830;border-color:#39404b}
button:disabled{opacity:.4;cursor:not-allowed}
button.primary{background:var(--acc);border-color:var(--acc);color:#fff;font-weight:600}
button.primary:hover:not(:disabled){background:var(--acc2);border-color:var(--acc2)}
button.big{width:100%;padding:12px;margin-bottom:8px;font-size:14px}
button.ghost{width:100%;padding:10px}
button.ghost.sm{width:auto;padding:6px 11px;font-size:12px}

/* ---------- dropzone ---------- */
.dropzone{border:1.5px dashed #333944;border-radius:10px;padding:20px 12px;text-align:center;
  cursor:pointer;transition:.15s;background:var(--panel2)}
.dropzone:hover,.dropzone.over{border-color:var(--acc);background:#191d26}
.dz-icon{font-size:20px;color:var(--acc);margin-bottom:6px}
.dz-title{font-weight:600;font-size:13px}
.dz-sub{font-size:11.5px;color:var(--tx2);margin-top:3px}
.imginfo{margin-top:10px;font-size:12px;color:var(--tx2);background:var(--panel2);
  border:1px solid var(--line);border-radius:8px;padding:8px 10px}
.imginfo b{color:var(--tx)}

/* ---------- presets ---------- */
.seambox{margin-top:10px;background:#2a2411;border:1px solid #4a3d14;border-radius:8px;
  padding:9px 10px;font-size:11.5px;color:#ffce6b;line-height:1.4}
.seambox button{margin-top:8px}
.presets{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:12px}
.preset{padding:8px 4px;font-size:11px;text-align:center;line-height:1.25}
.preset span{display:block;color:var(--tx2);font-size:10px}
.preset.active{border-color:var(--acc);background:#1a2440;color:#fff}
.preset.active span{color:#a9c0ff}

/* ---------- stage ---------- */
.stage{display:flex;flex-direction:column;min-width:0;background:
  radial-gradient(1200px 600px at 50% 0%,#15181d 0%,var(--bg) 70%)}
.stage-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:20px;min-height:0;position:relative}
#preview{max-width:100%;max-height:100%;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.55);
  background:#000;display:none}
.empty{text-align:center;color:var(--tx2)}
.empty-icon{font-size:44px;opacity:.5;margin-bottom:8px}

.transport{display:flex;align-items:center;gap:12px;padding:12px 20px;border-top:1px solid var(--line);
  background:var(--panel)}
.play{width:40px;height:40px;border-radius:50%;font-size:14px;display:grid;place-items:center;padding:0}
#scrub{flex:1;accent-color:var(--acc)}
.time{font-variant-numeric:tabular-nums;color:var(--tx2);font-size:12px;min-width:110px;text-align:right}
.warn{padding:9px 20px;background:#3a2a10;color:var(--warn);font-size:12.5px;border-top:1px solid #4a3714}

.hint{font-size:11.5px;color:var(--tx2);margin:2px 0 10px}
.batch{margin-top:6px;border-top:1px solid var(--line);padding-top:10px}
.batch summary{cursor:pointer;font-size:12px;color:var(--tx2);margin-bottom:8px}
.batchlist{display:grid;gap:6px;margin-bottom:8px;max-height:230px;overflow-y:auto;padding-right:4px}
.batchlist::-webkit-scrollbar{width:8px}
.batchlist::-webkit-scrollbar-thumb{background:#2b3038;border-radius:8px}
.batchgroup{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:var(--tx2);
  margin:6px 0 1px;font-weight:600}
.batchlist label{display:flex;align-items:center;gap:8px;margin:0;color:var(--tx);font-size:12px}
.batchlist input{accent-color:var(--acc)}

/* ---------- overlay ---------- */
.overlay{position:fixed;inset:0;background:rgba(4,5,7,.78);display:grid;place-items:center;z-index:50;
  backdrop-filter:blur(3px)}
.modal{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;width:340px;text-align:center}
.modal h3{margin:0 0 14px;font-size:15px}
.bar{height:8px;background:var(--panel2);border-radius:99px;overflow:hidden;margin-bottom:10px}
.bar>div{height:100%;width:0;background:linear-gradient(90deg,var(--acc),#8bc0ff);transition:width .12s}
.modal .hint{margin-bottom:14px}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#1d2129;
  border:1px solid var(--line);border-radius:10px;padding:11px 18px;font-size:13px;z-index:60;
  box-shadow:0 10px 30px rgba(0,0,0,.5)}
.toast.ok{border-color:#1f6b45;color:var(--ok)}
.toast.err{border-color:#6b2020;color:#ff8080}

@media(max-width:900px){
  body{overflow:auto}
  #app{grid-template-columns:1fr;height:auto}
  .sidebar{border-right:0;border-bottom:1px solid var(--line)}
  .stage-wrap{min-height:50vh}
}