:root{--bg:#f8fafc;--panel:#fff;--border:#e2e8f0;--text:#0f172a;--text-dim:#64748b;--accent:#f59e0b;--accent-strong:#d97706;--canvas-bg:#eef2f7;--grid-dot:#c7d2e0;--roof-fill:#e7e5e4eb;--roof-fill-draft:#f59e0b14;--roof-stroke:#78716c;--danger:#dc2626;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{background:var(--bg);font-size:14px}.app{flex-direction:column;height:100%;display:flex}.topbar{background:var(--panel);border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:10px;height:52px;padding:0 14px;display:flex}.brand{letter-spacing:-.01em;align-items:center;gap:8px;font-size:15px;font-weight:700;display:flex}.brand-icon{color:#fff;background:linear-gradient(135deg,#fbbf24,#f59e0b);border-radius:9px;place-items:center;width:32px;height:32px;display:grid;box-shadow:0 1px 3px #d9770666}.project-name{color:var(--text);background:0 0;border:1px solid #0000;border-radius:7px;width:220px;padding:6px 10px;font-size:14px;font-weight:500;transition:border-color .15s,background .15s}.project-name:hover{background:var(--bg)}.project-name:focus{border-color:var(--accent);background:#fff;outline:none}.topbar-group{align-items:center;gap:6px;display:flex}.topbar-spacer{flex:1}.zoom-label{color:var(--text-dim);font-variant-numeric:tabular-nums;font-size:12px}.save-warning{color:#b45309;text-overflow:ellipsis;white-space:nowrap;background:#fef3c7;border:1px solid #fcd34d;border-radius:7px;max-width:380px;padding:5px 10px;font-size:12px;overflow:hidden}.scale-status{border-radius:8px;margin-bottom:12px;padding:9px 11px;font-size:12.5px;line-height:1.5}.scale-status.ok{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0}.scale-status.warn{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}button{cursor:pointer;font-family:inherit}.icon-btn{width:34px;height:34px;color:var(--text);background:0 0;border:none;border-radius:8px;place-items:center;transition:background .15s;display:grid}.icon-btn:hover:not(:disabled){background:var(--bg)}.icon-btn:disabled{opacity:.3;cursor:default}.icon-btn.danger:hover{color:var(--danger);background:#fef2f2}.btn{border:1px solid var(--border);background:var(--panel);height:34px;color:var(--text);border-radius:8px;align-items:center;gap:7px;padding:0 13px;font-size:13px;font-weight:500;transition:background .15s,border-color .15s;display:inline-flex}.btn:hover{background:var(--bg);border-color:#cbd5e1}.btn.subtle{border-color:var(--border);color:var(--text-dim)}.btn.danger-subtle{color:var(--danger)}.btn.danger-subtle:hover{background:#fef2f2;border-color:#fecaca}button.primary{color:#fff;background:linear-gradient(135deg,#fbbf24,#f59e0b);border:none;border-radius:9px;height:38px;padding:0 18px;font-size:14px;font-weight:600;transition:filter .15s;box-shadow:0 1px 3px #d9770666}button.primary:hover{filter:brightness(1.05)}.main{flex:1;min-height:0;display:flex}.stage{flex:1;min-width:0;position:relative}.canvas{touch-action:none;width:100%;height:100%;display:block}.toolbar{background:var(--panel);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;align-items:center;gap:4px;width:52px;padding:10px 0;display:flex}.tool-btn{width:38px;height:38px;color:var(--text);background:0 0;border:none;border-radius:9px;place-items:center;transition:background .15s;display:grid;position:relative}.tool-btn:hover{background:var(--bg)}.tool-btn.active{color:var(--accent-strong);box-shadow:inset 0 0 0 1.5px var(--accent);background:#fef3c7}.tool-tip{color:#fff;text-align:left;opacity:0;visibility:hidden;pointer-events:none;z-index:40;background:#0f172a;border-radius:9px;flex-direction:column;gap:3px;width:max-content;max-width:240px;padding:8px 11px;transition:opacity .12s,transform .12s,visibility .12s;display:flex;position:absolute;top:50%;left:calc(100% + 12px);transform:translateY(-50%)translate(-4px);box-shadow:0 6px 20px #0f172a4d}.tool-tip:before{content:"";border:5px solid #0000;border-right-color:#0f172a;position:absolute;top:50%;right:100%;transform:translateY(-50%)}.tool-btn:hover .tool-tip,.tool-btn:focus-visible .tool-tip{opacity:1;visibility:visible;transition-delay:.25s;transform:translateY(-50%)translate(0)}.tool-tip-head{white-space:nowrap;align-items:center;gap:8px;font-size:12.5px;display:flex}.tool-tip-head kbd{color:#e2e8f0;background:#ffffff24;border:1px solid #ffffff40;border-radius:4px;padding:3px 5px;font-family:inherit;font-size:10.5px;font-weight:700;line-height:1}.tool-tip-desc{color:#cbd5e1;font-size:11.5px;line-height:1.45}.toolbar-sep{background:var(--border);width:26px;height:1px;margin:6px 0}.sidepanel{background:var(--panel);border-left:1px solid var(--border);flex-shrink:0;width:280px;padding-bottom:24px;overflow-y:auto}.sidepanel section{border-bottom:1px solid var(--border);padding:16px 16px 14px}.sidepanel h3{text-transform:uppercase;letter-spacing:.07em;color:var(--text-dim);margin-bottom:12px;font-size:11px;font-weight:700}.stats{grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px;display:grid}.stat{background:var(--bg);border-radius:10px;flex-direction:column;gap:2px;padding:10px 12px;display:flex}.stat-value{letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:18px;font-weight:700}.stat-label{color:var(--text-dim);font-size:11px}.cable-stats{flex-direction:column;gap:6px;display:flex}.cable-stat{align-items:center;gap:8px;font-size:13px;display:flex}.cable-len{font-variant-numeric:tabular-nums;color:var(--text-dim);margin-left:auto}.cable-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px;display:inline-block}.field{flex-direction:column;flex:1;gap:5px;min-width:0;margin-bottom:10px;display:flex}.field>span{color:var(--text-dim);font-size:12px}.field input[type=number],.field 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#0f172a2e}.roof-guide h3{margin-bottom:10px;font-size:15px}.roof-guide ol{gap:7px;margin:0 0 12px;padding-left:22px;font-size:13px;line-height:1.5;display:grid}.roof-guide ol li::marker{color:var(--accent-strong);font-weight:700}.roof-guide-tip{color:#92400e;background:#fef3c7;border:1px solid #fde68a;border-radius:9px;margin-bottom:14px;padding:9px 12px;font-size:12.5px;line-height:1.5}.roof-guide button.primary{width:100%}.wiz-modal{max-width:560px}.wiz-cards{grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0 14px;display:grid}.wiz-card{background:var(--panel);border:1px solid var(--border);cursor:pointer;text-align:center;border-radius:14px;flex-direction:column;align-items:center;gap:6px;padding:18px 12px 14px;transition:border-color .12s,transform .12s,box-shadow .12s;display:flex}.wiz-card:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:0 4px 14px #d9770626}.wiz-card b{font-size:14px}.wiz-card span{color:var(--text-dim);font-size:12px;line-height:1.35}.wiz-cards-modal{grid-template-columns:repeat(3,1fr)}.wiz-cards-welcome{grid-template-columns:repeat(5,1fr);gap:10px;max-width:640px;margin-left:auto;margin-right:auto}.wiz-cards-welcome .wiz-card{padding:12px 6px 10px}.wiz-cards-welcome .wiz-card b{font-size:12.5px}.wiz-cards-welcome .wiz-card span{font-size:10.5px}@media (width<=1100px){.wiz-cards-welcome{grid-template-columns:repeat(3,1fr)}}.wiz-card-active{border-color:var(--accent);box-shadow:inset 0 0 0 1.5px var(--accent);background:#fffbeb}.welcome-question{margin-top:14px;font-weight:600}.welcome-notsure,.welcome-alt{color:var(--text-dim);margin:6px 0 14px;font-size:12.5px}.welcome-alt{margin-top:14px}.wiz-skip{color:var(--text-dim);cursor:pointer;text-underline-offset:3px;background:0 0;border:none;margin:0 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0;border:none;margin-top:8px;padding:0;font-size:12px;text-decoration:underline}.pro-badge{letter-spacing:.08em;color:#b45309;cursor:pointer;background:#fef3c7;border:1px solid #fcd34d;border-radius:5px;margin-left:2px;padding:2px 6px;font-size:10px;font-weight:800}.pro-badge:hover{background:#fde68a}.redeem-link{color:var(--text-dim);background:0 0;border:none;margin:14px auto 0;font-size:12.5px;text-decoration:underline;display:block}.redeem-link:hover{color:var(--text)}.redeem-row{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.redeem-row input{border:1px solid var(--border);border-radius:8px;flex:1;min-width:0;height:34px;padding:0 10px;font-family:ui-monospace,monospace;font-size:12px}.redeem-row input:focus{border-color:var(--accent);outline:none}.redeem-error{width:100%;color:var(--danger);font-size:12px}.license-key{word-break:break-all;background:var(--bg);border:1px solid var(--border);-webkit-user-select:all;user-select:all;border-radius:9px;max-height:130px;margin-bottom:16px;padding:12px;font-family:ui-monospace,monospace;font-size:11px;line-height:1.5;overflow-y:auto}.upgrade-btn{color:#b45309;background:#fffbeb;border-color:#fcd34d;font-weight:600}.upgrade-btn:hover{background:#fef3c7;border-color:#fbbf24}.lang-toggle{border:1px solid var(--border);border-radius:8px;height:30px;display:flex;overflow:hidden}.lang-toggle button{color:var(--text-dim);background:#fff;border:none;padding:0 10px;font-size:12px;font-weight:600}.lang-toggle button.active{color:var(--accent-strong);background:#fef3c7}.free-limit-pill{text-align:left;color:#b45309;background:#fffbeb;border:1px dashed #fcd34d;border-radius:9px;width:100%;margin-bottom:12px;padding:7px 11px;font-size:12px;font-weight:600;transition:background .15s;display:block}.free-limit-pill:hover{background:#fef3c7}.upgrade-modal{width:380px}.upgrade-header h3{letter-spacing:-.02em;font-size:20px}.upgrade-header p{margin-top:2px}.upgrade-features{flex-direction:column;gap:9px;margin:6px 0 16px;list-style:none;display:flex}.upgrade-features li{padding-left:26px;font-size:14px;position:relative}.upgrade-features li:before{content:"✓";width:18px;height:18px;color:var(--accent-strong);background:#fef3c7;border-radius:50%;place-items:center;font-size:12px;font-weight:700;display:grid;position:absolute;top:-1px;left:0}.upgrade-price{letter-spacing:-.02em;margin-bottom:16px;font-size:22px;font-weight:800}.toast{z-index:20;border-radius:10px;align-items:center;gap:12px;padding:11px 16px;font-size:13.5px;font-weight:500;display:flex;position:absolute;bottom:18px;left:50%;transform:translate(-50%);box-shadow:0 6px 20px #0f172a33}.toast-ok{color:#15803d;background:#f0fdf4;border:1px solid #bbf7d0}.toast-err{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}.toast button{color:inherit;opacity:.6;background:0 0;border:none}.toast button:hover{opacity:1}.modal-backdrop{z-index:100;background:#0f172a73;place-items:center;display:grid;position:fixed;inset:0}.modal{background:#fff;border-radius:14px;width:340px;padding:22px;box-shadow:0 12px 40px #0f172a4d}.modal h3{margin-bottom:6px;font-size:16px}.modal p{color:var(--text-dim);margin-bottom:14px;font-size:13px;line-height:1.5}.modal-row{align-items:center;gap:10px;margin-bottom:18px;display:flex}.modal-row input{border:1px solid var(--border);border-radius:8px;flex:1;height:38px;padding:0 12px;font-family:inherit;font-size:15px}.modal-row input:focus{border-color:var(--accent);outline:none}.modal-actions{justify-content:flex-end;gap:8px;display:flex}.modal-actions button:not(.primary){border:1px solid var(--border);background:#fff;border-radius:9px;height:38px;padding:0 14px;font-size:14px}.account-btn{text-overflow:ellipsis;white-space:nowrap;max-width:160px;overflow:hidden}.account-modal{width:360px}.account-modal h3{margin-bottom:8px}.account-modal>div>p,.account-modal p{margin-bottom:12px}.account-info{background:var(--bg);border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:8px;margin-bottom:16px;padding:12px;display:flex}.account-row{justify-content:space-between;font-size:13.5px;display:flex}.account-row span{color:var(--text-dim)}.auth-error{color:var(--danger);margin-bottom:10px;font-size:12.5px}.auth-links{flex-direction:column;align-items:center;gap:6px;margin-top:14px;display:flex}.link-btn{color:var(--text-dim);background:0 0;border:none;font-size:12.5px;text-decoration:underline}.link-btn:hover{color:var(--text)}.account-needed{background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;margin-bottom:12px;padding:8px 11px;font-size:12.5px}.legal-links{gap:12px;margin-top:14px;display:flex}.legal-links a{color:#94a3b8;font-size:11px;text-decoration:none}.legal-links a:hover{color:var(--text-dim);text-decoration:underline}