*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0f1117;--panel:#1a1d27;--border:#2a2d3a;--text:#e8e8ec;--muted:#8888a0;--accent:#6c5ce7;--accent2:#a29bfe;--radius:10px}
body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow-x:hidden}

.app{display:grid;grid-template-columns:340px 1fr;grid-template-rows:56px 1fr;height:100vh;overflow:hidden}

/* Header */
.header{grid-column:1/-1;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px;z-index:10}
.header h1{font-size:18px;font-weight:600;display:flex;align-items:center;gap:8px}
.header h1 span{font-size:22px}
.lang-switch{display:flex;gap:4px}
.lang-btn{background:transparent;border:1px solid var(--border);color:var(--muted);padding:4px 10px;border-radius:6px;cursor:pointer;font-size:12px;transition:.2s}
.lang-btn:hover,.lang-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* Sidebar */
.sidebar{background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:14px}
.sidebar::-webkit-scrollbar{width:4px}
.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

.section{background:rgba(255,255,255,.02);border:1px solid var(--border);border-radius:var(--radius);padding:14px}
.section-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:12px;font-weight:600}

/* Type selector */
.type-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.type-grid.glass-grid{grid-template-columns:1fr 1fr 1fr}
.type-btn{background:rgba(255,255,255,.03);border:2px solid var(--border);border-radius:8px;padding:10px 4px;text-align:center;cursor:pointer;transition:.2s;font-size:11px;color:var(--muted)}
.type-btn:hover{border-color:var(--accent);color:var(--text)}
.type-btn.active{border-color:var(--accent);background:rgba(108,92,231,.15);color:var(--accent2)}
.type-btn .icon{font-size:22px;display:block;margin-bottom:4px}

/* Percentage Slider */
.percent-slider-wrap{padding:4px 0}
.pct-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-bottom:4px}
.pct-labels span{font-weight:500;text-transform:uppercase;letter-spacing:.05em}
.pct-value{text-align:center;font-size:28px;font-weight:700;color:var(--accent2);margin-top:6px;letter-spacing:-.02em}
#pctRange{width:100%;height:8px;accent-color:var(--accent);cursor:pointer;border-radius:4px}

/* Inputs */
.field{margin-bottom:10px}
.field label{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}
.field-row{display:flex;gap:8px;align-items:center}
.field input[type=range]{width:100%;accent-color:var(--accent);height:4px;cursor:pointer}
.field input[type=number]{width:70px;background:rgba(255,255,255,.05);border:1px solid var(--border);border-radius:6px;padding:6px 8px;color:var(--text);font-size:13px;text-align:center}
.field input[type=number]:focus{outline:none;border-color:var(--accent)}
.field .val{font-size:13px;color:var(--accent2);min-width:40px;text-align:right;font-weight:500}

/* Color picker */
.color-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.color-swatch{width:100%;aspect-ratio:1;border-radius:6px;cursor:pointer;border:2px solid transparent;transition:.2s}
.color-swatch:hover{transform:scale(1.1)}
.color-swatch.active{border-color:#fff;box-shadow:0 0 8px rgba(255,255,255,.3)}

/* Wall checkboxes */
.wall-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.wall-check{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);cursor:pointer;padding:6px 8px;border:1px solid var(--border);border-radius:6px;transition:.2s}
.wall-check:hover{border-color:var(--accent)}
.wall-check input[type=checkbox]{accent-color:var(--accent)}

/* Viewer */
.viewer{position:relative;overflow:hidden;background:#000}
.viewer canvas{display:block;width:100%!important;height:100%!important}
.viewer-hint{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.6);backdrop-filter:blur(10px);padding:6px 16px;border-radius:20px;font-size:11px;color:var(--muted);pointer-events:none;transition:opacity .5s}

/* Responsive */
@media(max-width:768px){
  .app{grid-template-columns:1fr;grid-template-rows:56px 60vh auto;overflow-y:auto}
  .sidebar{order:2;flex-direction:column;overflow-y:auto;padding:10px;gap:8px;max-height:none}
  .section{min-width:auto;flex-shrink:0}
  .viewer{order:1;min-height:50vh}
}