:root{--bg:#f5f6f8;--card:#ffffff;--text:#1a1d21;--muted:#6b7280;--accent:#2f6fed;--accent-dark:#1e4fd1;--danger:#d13d3d;--ok:#2f9e44;--border:#e3e6ea}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:16px;line-height:1.45}main{max-width:640px;margin:0 auto;padding:16px}h1{font-size:22px;margin:8px 0 16px}h2{font-size:18px;margin:16px 0 8px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}.btn{display:block;width:100%;padding:18px;margin-bottom:12px;border:none;border-radius:12px;background:var(--accent);color:#fff;font-size:18px;font-weight:600;text-align:center;text-decoration:none;cursor:pointer}.btn:active{background:var(--accent-dark)}.btn.secondary{background:#eef2ff;color:var(--accent-dark)}.btn[disabled]{opacity:.5;cursor:default}.back{display:inline-block;margin-bottom:12px;color:var(--accent);text-decoration:none}.msg{padding:10px 12px;border-radius:8px;margin:8px 0;font-size:14px}.msg.err{background:#fdecec;color:var(--danger)}.msg.ok{background:#e8f7ec;color:var(--ok)}.dim{color:var(--muted);font-size:13px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:8px 6px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600;font-size:12px}td.num,th.num{text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.highlight{color:var(--danger);font-weight:600}.scene{width:100%;height:420px;border-radius:12px;background:#eef1f5;touch-action:none}.legend{display:flex;gap:16px;margin:8px 0 0;font-size:13px;color:var(--muted)}.legend span:before{content:"";display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px}.legend .c-wall:before{background:#dfe5ec}.legend .c-floor:before{background:#b8c6d8}.legend .c-open:before{background:#2f6fed}.label3d{font-size:13px;color:var(--muted);margin-top:8px}.room-list{list-style:none;padding:0;margin:0}.room-list li{padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}.room-list .lbl{font-weight:600}.price-note{font-size:12px;color:var(--muted);margin-top:4px}