:root{--bg-primary:#0a0a0a;--bg-secondary:#111;--bg-tertiary:#1a1a1a;--bg-panel:#151515;--text-primary:#fff;--text-secondary:#999;--text-muted:#666;--accent:#0f0;--accent-dim:#0a0;--border:#2a2a2a;--shadow:0 2px 8px #0000004d}*{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow:hidden}#app{width:100%;height:100%}.app-layout{width:100%;height:100%;display:flex}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;width:320px;min-width:320px;display:flex;overflow:hidden}.sidebar-header{border-bottom:1px solid var(--border);background:var(--bg-tertiary);padding:16px 20px}.logo{color:var(--accent);margin:0;font-size:1.3rem;font-weight:700}.sidebar-content{flex:1;padding:12px;overflow-y:auto}.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:8px;margin-bottom:12px;padding:12px}.panel-title{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px;font-size:.75rem;font-weight:600}.upload-area{background:var(--bg-tertiary);border:2px dashed var(--border);cursor:pointer;color:var(--text-secondary);border-radius:8px;justify-content:center;align-items:center;gap:10px;padding:16px;font-size:.9rem;transition:all .2s;display:flex}.upload-area:hover{border-color:var(--accent);color:var(--accent)}.upload-area.drag-over{border-color:var(--accent);background:#00ff000d}.upload-icon{font-size:1.4rem}.image-preview{background:var(--bg-tertiary);border-radius:6px;align-items:center;gap:10px;margin-top:10px;padding:10px;display:flex}.image-preview img{object-fit:cover;border-radius:4px;width:50px;height:50px}.image-info{color:var(--text-secondary);font-size:.75rem;line-height:1.4}.control-row{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.control-row label{color:var(--text-secondary);font-size:.85rem}.control-row select,.control-row input[type=text]{width:140px}select,input[type=text]{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);border-radius:4px;padding:6px 10px;font-size:.85rem}select:focus,input[type=text]:focus{border-color:var(--accent);outline:none}.full-width{width:100%;margin-bottom:8px}.slider-row{margin-bottom:8px}.slider-row label{color:var(--text-secondary);justify-content:space-between;margin-bottom:4px;font-size:.8rem;display:flex}.slider-row span{color:var(--accent);font-weight:600}input[type=range]{background:var(--bg-tertiary);-webkit-appearance:none;border-radius:2px;outline:none;width:100%;height:4px}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--accent);cursor:pointer;width:14px;height:14px;box-shadow:0 0 6px var(--accent);border-radius:50%}input[type=range]::-moz-range-thumb{background:var(--accent);cursor:pointer;border:none;border-radius:50%;width:14px;height:14px}.custom-resolution{border-top:1px solid var(--border);margin-top:8px;padding-top:8px}.custom-resolution.hidden{display:none}.checkbox-row{gap:12px;margin-top:8px;display:flex}.checkbox-inline{cursor:pointer;color:var(--text-secondary);align-items:center;gap:6px;font-size:.85rem;display:flex}.checkbox-inline input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent);cursor:pointer}.preset-grid{grid-template-columns:repeat(2,1fr);gap:6px;display:grid}.preset-btn{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:6px;padding:8px;font-size:.8rem;transition:all .2s}.preset-btn:hover{background:var(--accent);color:var(--bg-primary);border-color:var(--accent)}.main-content{background:var(--bg-primary);flex-direction:column;flex:1;display:flex;overflow:hidden}.output-toolbar{background:var(--bg-secondary);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.toolbar-left{align-items:center;gap:12px;display:flex}.output-title{color:var(--text-secondary);font-size:.9rem;font-weight:600}.toolbar-right{gap:6px;display:flex}.tool-btn{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:4px;padding:6px 12px;font-size:.8rem;transition:all .2s}.tool-btn:hover:not(:disabled){background:var(--accent);color:var(--bg-primary);border-color:var(--accent)}.tool-btn:disabled{opacity:.4;cursor:not-allowed}.tool-btn.share-btn{background:var(--accent-dim);border-color:var(--accent);color:var(--bg-primary);font-weight:600}.tool-btn.share-btn:hover:not(:disabled){background:var(--accent)}.ascii-container{color:var(--accent);white-space:pre;background:#000;flex:1;padding:20px;font-family:Courier New,monospace;font-size:8px;line-height:1;overflow:auto}.ascii-container .placeholder{color:var(--text-muted);text-align:center;padding:100px 20px;font-family:inherit;font-size:1rem;line-height:1.5}.ascii-container .placeholder.error{color:#f44}.sidebar-content::-webkit-scrollbar{width:8px}.ascii-container::-webkit-scrollbar{width:8px}.sidebar-content::-webkit-scrollbar-track{background:var(--bg-tertiary)}.ascii-container::-webkit-scrollbar-track{background:var(--bg-tertiary)}.sidebar-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.ascii-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.sidebar-content::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.ascii-container::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.toast{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border);box-shadow:var(--shadow);z-index:9999;border-radius:6px;padding:12px 20px;font-size:.9rem;position:fixed;bottom:20px;right:20px}.toast.success{border-left:3px solid var(--accent)}.toast.error{border-left:3px solid #f44}.toast.info{border-left:3px solid #0af}.hidden{display:none!important}@media (width<=900px){.app-layout{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--border);width:100%;min-width:100%;max-height:50vh}.main-content{min-height:50vh}.toolbar-right{flex-wrap:wrap}}@media (width<=480px){.sidebar{max-height:40vh}.preset-grid{grid-template-columns:repeat(3,1fr)}.tool-btn{padding:6px 8px;font-size:.75rem}}