:root{--bg: #0f172a;--bg-card: #ffffff;--bg-card-dark: #1e293b;--text: #1e293b;--text-dark: #e2e8f0;--muted: #64748b;--muted-dark: #94a3b8;--primary: #2563eb;--primary-dark: #3b82f6;--danger: #dc2626;--success: #16a34a;--radius: 14px;--shadow: 0 10px 30px rgba(0, 0, 0, .25)}*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(160deg,#0f172a,#1e293b);color:var(--text-dark);min-height:100vh;-webkit-font-smoothing:antialiased}#root{min-height:100vh}code{background:#94a3b840;padding:2px 6px;border-radius:6px;font-size:.9em;word-break:break-all}.onboarding{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.onboarding-card{width:100%;max-width:520px;background:var(--bg-card);color:var(--text);border-radius:20px;box-shadow:var(--shadow);padding:32px 28px}.onboarding-progress{display:flex;justify-content:center;gap:8px;margin-bottom:28px}.dot{width:10px;height:10px;border-radius:50%;background:#cbd5e1;transition:all .2s ease}.dot.active{background:var(--primary);transform:scale(1.3)}.dot.done{background:var(--success)}.onboarding-step{text-align:center;animation:fadeIn .25s ease}.icon-large{font-size:56px;margin-bottom:12px}.onboarding-step h1{margin:0 0 8px;font-size:26px;color:var(--text)}.lead{color:var(--muted);line-height:1.6;margin:0 0 24px}.hint{font-size:13px;color:var(--muted);background:#f1f5f9;border-radius:10px;padding:12px;margin:0 0 16px;line-height:1.5}.feature-list{list-style:none;padding:0;margin:0 0 24px;text-align:left}.feature-list li{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid #e2e8f0}.feature-list li:last-child{border-bottom:none}.feature-icon{font-size:28px;line-height:1}.feature-list strong{display:block;margin-bottom:4px;font-size:15px}.feature-list p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.badge{display:block;border-radius:10px;padding:10px 14px;font-size:14px;margin:0 0 16px;text-align:left;word-break:break-word}.badge-success{background:#dcfce7;color:#166534}.badge-danger{background:#fee2e2;color:#991b1b}.button{border:none;border-radius:10px;padding:12px 18px;font-size:15px;font-weight:600;cursor:pointer;transition:transform .1s ease,filter .15s ease,opacity .15s ease;font-family:inherit}.button:active{transform:scale(.97)}.button:disabled{opacity:.5;cursor:not-allowed}.button-primary{background:var(--primary);color:#fff}.button-primary:hover:not(:disabled){background:var(--primary-dark)}.button-secondary{background:#7c3aed;color:#fff}.button-secondary:hover:not(:disabled){background:#8b5cf6}.button-danger{background:var(--danger);color:#fff}.button-ghost{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}.button-ghost:hover:not(:disabled){background:#2563eb14}.button-block{width:100%}.button-row{display:flex;gap:12px;justify-content:center}.button-row .button{flex:1}.main-demo-page{max-width:760px;margin:0 auto;padding:20px 16px 60px}.back-to-nav{margin-bottom:8px}.back-to-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-dark);text-decoration:none;font-size:14px;opacity:.85}.back-to-link:hover{opacity:1}.page-header{text-align:center;margin:16px 0 24px}.page-header h1{margin:0;font-size:30px}.page-header h2{margin:10px 0 0;font-size:14px;font-weight:500;color:var(--muted-dark)}.app-mode{color:#4ade80!important}.not-app-demo{color:#fbbf24!important}.section-content{display:flex;flex-direction:column;gap:20px}.card{background:var(--bg-card-dark);border:1px solid #334155;border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card h3{margin:18px 0 8px;font-size:16px;color:var(--text-dark)}.card h3:first-child{margin-top:0}.description{color:var(--muted-dark);font-size:14px;line-height:1.6;margin:0 0 18px}.status-row{display:flex;align-items:center;gap:10px;margin-bottom:6px}.status-dot{width:12px;height:12px;border-radius:50%;background:#94a3b8}.status-dot.on{background:#22c55e;box-shadow:0 0 10px #22c55eb3;animation:pulse 1.5s infinite}.status-dot.off{background:#64748b}.mode-chip{background:#3b82f633;color:#93c5fd;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;margin-left:auto}.status-message{color:var(--muted-dark);font-size:14px;margin:0 0 14px}.button-group{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}.button-group .button{flex:1;min-width:180px}.data-box{width:100%;resize:vertical;border-radius:10px;border:1px solid #334155;background:#0b1220;color:#a5f3fc;font-family:SF Mono,Menlo,Consolas,monospace;font-size:13px;line-height:1.5;padding:12px;white-space:pre}.data-box:focus{outline:2px solid var(--primary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}@media (max-width: 480px){.onboarding-card{padding:24px 18px}.button-group .button{min-width:100%}}