:root{
  --bg:#060913;
  --panel:#101725;
  --panel-2:#0c1320;
  --line:rgba(113,224,255,.16);
  --text:#f3f7ff;
  --muted:#b7c8e6;
  --accent:#3fd9ff;
  --gold:#ffd369;
}
*{box-sizing:border-box}
html,body{
  margin:0;padding:0;min-height:100%;
  font-family:Arial,Helvetica,sans-serif;
  background:
    radial-gradient(circle at top, rgba(61,217,255,0.08), transparent 35%),
    radial-gradient(circle at center, rgba(255,211,105,0.05), transparent 25%),
    var(--bg);
  color:var(--text)
}
.app-shell{display:grid;grid-template-columns:390px 1fr;min-height:100vh}
.sidebar{
  padding:24px;border-right:1px solid var(--line);
  background:linear-gradient(180deg,#0b1220,#08111c)
}
.content{padding:24px;display:grid;gap:20px}
.brand-box{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.brand-logo{
  width:76px;height:76px;object-fit:contain;border-radius:18px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);padding:8px
}
h1,h2{margin:0 0 10px}
.subtitle{margin:0;color:var(--muted)}
label{display:grid;gap:8px;margin-bottom:12px;font-weight:700}
input,textarea,button{font:inherit}
input,textarea{
  width:100%;background:#0b1320;color:var(--text);
  border:1px solid var(--line);border-radius:16px;padding:14px 16px;outline:none
}
textarea{resize:vertical}
button{
  background:linear-gradient(135deg,var(--accent),#74ecff);
  color:#001018;border:none;border-radius:16px;padding:14px 16px;
  font-weight:800;cursor:pointer;box-shadow:0 10px 24px rgba(63,217,255,.18)
}
button.secondary{
  background:#152132;color:var(--text);border:1px solid var(--line);box-shadow:none
}
.button-stack{display:grid;gap:10px;margin:16px 0}
.panel{
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);border-radius:24px;padding:18px;
  box-shadow:0 16px 30px rgba(0,0,0,0.24)
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.badge{
  display:inline-flex;align-items:center;padding:7px 12px;border-radius:999px;
  font-size:12px;font-weight:800;border:1px solid rgba(255,255,255,.12);
  color:var(--gold);background:rgba(255,211,105,.08)
}
.canvas-stage{width:100%;display:flex;justify-content:center;align-items:center}
.canvas-square{
  width:min(100%,980px);
  aspect-ratio:1/1;
  background:#000;
  border-radius:20px;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center
}
#expert-canvas{
  width:100%;
  height:100%;
  display:block;
  background:#000
}
.grid-two{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.table-like{display:grid;gap:10px}
.row{
  padding:12px 14px;border:1px solid rgba(255,255,255,.06);
  border-radius:14px;background:rgba(255,255,255,.02)
}
.muted{color:var(--muted)}
@media(max-width:1120px){
  .app-shell{
    grid-template-columns:1fr;
  }

  .sidebar{
    border-right:none;
    border-bottom:1px solid var(--line);
  }

  .grid-two{
    grid-template-columns:1fr;
  }
}

@media(max-width:640px){
  html,
  body{
    width:100%;
    overflow-x:hidden;
  }

  .app-shell{
    display:flex;
    flex-direction:column;
    width:100%;
    min-height:100vh;
  }

  .sidebar{
    width:100%;
    max-width:100%;
    padding:12px;
    border-right:none;
    border-bottom:1px solid var(--line);
  }

  .content{
    width:100%;
    max-width:100%;
    padding:10px;
    overflow:hidden;
  }

  .panel{
    padding:14px;
    border-radius:18px;
  }

  .grid-two{
    display:grid;
    grid-template-columns:1fr;
    gap:14px;
  }

  .canvas-stage{
    width:100%;
    overflow:hidden;
    display:flex;
    justify-content:center;
    align-items:center;
  }

  .canvas-square{
    width:100%;
    max-width:400px;
    aspect-ratio:1/1;
    margin:0 auto;
    border-radius:16px;
    overflow:hidden;
  }

  #expert-canvas{
    width:100%;
    height:100%;
    display:block;
  }

  input,
  textarea,
  select{
    width:100%;
    font-size:16px;
  }

  button,
  .btn{
    width:100%;
    min-height:48px;
  }

  .table-like{
    gap:8px;
  }

  .row{
    padding:10px 12px;
    border-radius:12px;
  }
}

  #expert-canvas{
    width:100%;
    height:100%;
    display:block;
  }

  input,
  select,
  textarea{
    font-size:16px;
    width:100%;
  }

  button,
  .btn{
    width:100%;
    min-height:48px;
    font-size:15px;
  }

  .table-like{
    gap:8px;
  }

  .row{
    padding:10px 12px;
    border-radius:12px;
  }
}
@media(max-width:700px){

  html,
  body{
    overflow-x:hidden;
  }

  .top{
    top:14px;
    width:100%;
    left:0;
    transform:none;
    text-align:center;
    padding:0 16px;
  }

  .top h1{
    font-size:20px;
    line-height:1.35;
    letter-spacing:.18em;
  }

  .top p{
    font-size:14px;
    line-height:1.35;
  }

  .left{
    position:relative;
    top:125px;
    left:12px;
    width:calc(100vw - 24px);
    max-width:calc(100vw - 24px);
    height:auto;
    max-height:none;
    bottom:auto;
    z-index:20;
    margin-bottom:140px;
  }

  .right{
    display:none;
  }

  .bar{
    position:fixed;
    left:10px;
    right:10px;
    bottom:10px;
    transform:none;
    width:auto;
    height:auto;
    flex-wrap:wrap;
    justify-content:center;
    z-index:40;
  }

  .bar button{
    flex:1 1 42%;
    min-width:120px;
  }

  canvas{
    position:fixed;
    inset:0;
    width:100vw;
    height:100vh;
  }
}