:root{
  --bg: #f7fbff;
  --card: #ffffff;
  --muted: #6b7280;
  --accent: linear-gradient(90deg,#ff7a7a,#ffcf6b);
  --primary: #6c63ff;
  --glass: rgba(255,255,255,0.6);
  --shadow: 0 8px 30px rgba(99,102,241,0.08);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg,#f8fbff 0%, #fff 60%);
  color:#0f172a;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:28px;
}

.page{
  max-width:1100px;
  margin:0 auto;
}

.topbar{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:20px;
  margin-bottom:18px;
}
.topbar h1{
  font-size:24px;
  margin:0;
  letter-spacing:-0.2px;
}
.tag{
  color:var(--muted);
  margin:0;
  font-size:13px;
}

/* Layout */
.main{
  display:grid;
  grid-template-columns: 360px 1fr;
  gap:20px;
}

/* Controls card */
.controls-card{
  background:var(--card);
  padding:18px;
  border-radius:12px;
  box-shadow:var(--shadow);
  border: 1px solid rgba(16,24,40,0.04);
}
.file-label input[type="file"]{
  display:block;
}
.control-row{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:12px;
}
.control{
  text-align:left;
}
.control label{
  display:block;
  font-size:13px;
  color:var(--muted);
  margin-bottom:6px;
}
input[type="range"]{
  width:100%;
  accent-color: #6c63ff;
}

/* Buttons */
.buttons{
  display:flex;
  gap:10px;
  margin-top:14px;
  align-items:center;
  flex-wrap:wrap;
}
.btn{
  padding:10px 14px;
  border-radius:10px;
  border: none;
  cursor:pointer;
  background:transparent;
  box-shadow:none;
  font-weight:600;
  color:#0f172a;
  border:1px solid rgba(15,23,42,0.06);
}
.btn.primary{
  background:var(--primary);
  color:#fff;
  border:none;
  box-shadow: 0 6px 18px rgba(108,99,255,0.12);
}
.btn.accent{
  background:var(--accent);
  color:#1f2937;
  border:none;
  font-weight:700;
}

/* Preview card */
.preview-card{
  background:linear-gradient(180deg, #ffffff, #fbfcff);
  padding:18px;
  border-radius:12px;
  box-shadow:var(--shadow);
  border: 1px solid rgba(16,24,40,0.04);
}
.preview-header h2{
  margin:0 0 12px 0;
  font-size:16px;
}
.canvas-row{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.canvas-wrap{
  flex:1 1 45%;
  min-width:280px;
  background: linear-gradient(180deg,#ffffff,#fbfdff);
  padding:12px;
  border-radius:10px;
  border:1px solid rgba(16,24,40,0.03);
}
.canvas-title{
  font-size:13px;
  color:var(--muted);
  margin-bottom:10px;
}
canvas{
  display:block;
  width:100%;
  height:auto;
  background:#fff;
  border-radius:8px;
  border:1px solid rgba(15,23,42,0.04);
  box-shadow: 0 6px 18px rgba(16,24,40,0.03);
  image-rendering: pixelated; /* crisp pixels */
}

/* Footer */
.footer{
  margin-top:18px;
  text-align:center;
  color:var(--muted);
  font-size:13px;
}

/* Responsive */
@media (max-width:900px){
  .main{ grid-template-columns: 1fr; }
  .canvas-row{ flex-direction:column; }
}