:root{color:#e2e8f0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.4;font-weight:400;background:#020617}*{box-sizing:border-box}html,body,#root{margin:0;width:100%;height:100%}.auth-shell{display:grid;place-items:center;width:100%;height:100%;padding:24px;background:radial-gradient(circle at top left,#1e293b,#020617 60%)}.auth-card{width:min(420px,100%);border:1px solid #334155;border-radius:14px;padding:22px;background:#020617e6;display:grid;gap:10px}.auth-card h1{margin:0;font-size:1.35rem}.auth-subtitle{margin:0 0 8px;color:#94a3b8}.auth-label{color:#cbd5e1;font-size:.9rem}.auth-input{border:1px solid #475569;background:#0f172a;color:#e2e8f0;border-radius:8px;padding:10px 12px;font-size:16px;outline:none}.auth-input:focus{border-color:#0ea5e9}.auth-error{color:#fca5a5;font-size:.88rem}.app-shell{display:grid;grid-template-columns:320px 1fr;height:100%;position:relative;overflow:hidden;background:radial-gradient(circle at top left,#1e293b,#020617 60%)}.panel{padding:20px;border-right:1px solid #334155;background:#020617d9;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);overflow-y:auto;transition:transform .18s ease,opacity .18s ease}.brand-block{margin-bottom:8px}.brand-block h1{margin:0 0 6px;font-size:1.35rem}.brand-logo{display:block;max-width:150px;max-height:42px;margin-bottom:8px;object-fit:contain}.help-text{margin:0 0 14px;color:#94a3b8;font-size:.95rem}.file-input{display:none}.actions{display:flex;gap:10px;margin-bottom:16px}.demo-actions{display:grid;gap:10px;margin-bottom:16px}button{border:1px solid #475569;background:#0f172a;color:#e2e8f0;padding:8px 12px;border-radius:8px;cursor:pointer}button:hover{background:#1e293b}button:disabled{opacity:.55;cursor:not-allowed}.status-block{border:1px solid #334155;border-radius:8px;padding:12px;background:#0f172abf}.status-text{font-size:.92rem;color:#cbd5e1;margin-bottom:8px;min-height:2.5em}.progress-wrap{display:flex;flex-direction:column;gap:6px}.progress-label{font-size:.8rem;color:#94a3b8}.progress-bar{width:100%;height:10px;border-radius:999px;background:#1e293b;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#0ea5e9,#22d3ee);transition:width .12s ease}.controls-help{margin-top:16px;display:grid;gap:6px;font-size:.85rem;color:#94a3b8}.mobile-hide-controls{display:none}.viewer{position:relative;min-width:0}.sidebar-toggle{position:absolute;top:14px;left:14px;z-index:5}.app-shell.sidebar-collapsed{grid-template-columns:1fr}.app-shell.sidebar-collapsed .panel{transform:translate(-100%);opacity:0;pointer-events:none}.viewer-dragging{outline:3px dashed #22d3ee;outline-offset:-10px}.viewport{width:100%;height:100%}.drop-hint{position:absolute;left:50%;bottom:18px;transform:translate(-50%);border:1px solid #334155;border-radius:999px;padding:6px 12px;color:#94a3b8;background:#020617bf;pointer-events:none;font-size:.85rem}@media(max-width:900px){.app-shell{grid-template-columns:1fr;grid-template-rows:1fr}.panel{position:absolute;top:0;left:0;width:min(340px,88vw);height:100%;z-index:6;border-right:1px solid #334155;border-bottom:none}.app-shell.sidebar-collapsed .panel{transform:translate(-100%);opacity:0;pointer-events:none}.app-shell.sidebar-open .panel{transform:translate(0);opacity:1;pointer-events:auto}.drop-hint{left:14px;transform:none;bottom:14px}.mobile-hide-controls{display:block;width:100%;position:sticky;bottom:0;margin-top:14px;background:#020617f2}}