:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;font-weight:400;--primary-color: #3b82f6;--primary-hover: #2563eb;--secondary-color: #64748b;--accent-color: #f59e0b;--success-color: #10b981;--danger-color: #ef4444;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #f1f5f9;--text-primary: #1e293b;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-radius: 12px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);color-scheme:light;color:var(--text-primary);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(135deg,var(--bg-secondary) 0%,var(--bg-tertiary) 100%)}#root{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding:2rem;max-width:1400px;margin:0 auto;width:100%}.grid-2{display:grid;grid-template-columns:1fr;gap:1rem}@media(min-width:768px){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}h1{font-size:3rem;font-weight:700;line-height:1.2;margin-bottom:2rem;background:linear-gradient(135deg,var(--primary-color),var(--accent-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center}h2{font-size:2rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem}h3{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem}p{color:var(--text-secondary);line-height:1.6}button{border-radius:var(--border-radius);border:none;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;font-family:inherit;background:var(--primary-color);color:#fff;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-sm)}button:hover{background:var(--primary-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}button:active{transform:translateY(0);box-shadow:var(--shadow-sm)}button:disabled{background:var(--text-muted);cursor:not-allowed;transform:none;box-shadow:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:var(--border-radius);padding:.625rem 1.25rem;font-weight:600;box-shadow:var(--shadow-sm)}.btn-sm{padding:.375rem .75rem;font-size:.875rem}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{background:var(--danger-color);color:#fff}.btn-danger:hover{filter:brightness(.95)}.btn-outline{background:transparent;color:var(--text-primary);border:1px solid var(--border-color)}.btn-outline:hover{background:var(--bg-secondary)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-secondary)}.btn:disabled,.btn[disabled]{opacity:.6;box-shadow:none}.card{background:var(--bg-primary);border-radius:var(--border-radius);padding:1.25rem 1.5rem;margin-bottom:2rem;box-shadow:var(--shadow-md);border:1px solid var(--border-color);transition:all .2s ease}.card.full-height{flex:1;display:flex;flex-direction:column;overflow:hidden}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}input,textarea,select{border-radius:var(--border-radius);border:1px solid var(--border-color);padding:.75rem 1rem;font-size:1rem;font-family:inherit;background:var(--bg-primary);color:var(--text-primary);transition:all .2s ease;width:100%}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f61a}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-primary{color:var(--primary-color)}.text-success{color:var(--success-color)}.text-danger{color:var(--danger-color)}.bg-success{background-color:var(--success-color)}.bg-danger{background-color:var(--danger-color)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.flex-1{flex:1}.min-w-0{min-width:0}.gap-4{gap:1rem}.gap-6{gap:1.5rem}.gap-8{gap:2rem}.mb-4{margin-bottom:1rem}.mb-8{margin-bottom:2rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.messages-container{background:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--border-color);min-height:300px;max-height:500px;overflow-y:auto;padding:1rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;text-align:center}.messages-list{display:flex;flex-direction:column;gap:1rem}.message-item{background:var(--bg-primary);border-radius:var(--border-radius);padding:1rem;border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.message-sent{margin-left:2rem;border-left:4px solid var(--primary-color)}.message-received{margin-right:2rem;border-left:4px solid var(--accent-color)}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.message-sender{font-weight:600;color:var(--text-primary)}.message-time{font-size:.875rem;color:var(--text-muted)}.message-content{color:var(--text-secondary);line-height:1.5}.api-status{padding:.5rem 1rem;border-radius:2rem;font-weight:600;font-size:.9rem;display:inline-block;margin-top:.5rem}.api-status.connected{background:#10b9811a;color:var(--success-color);border:1px solid rgba(16,185,129,.2)}.api-status.disconnected{background:#ef44441a;color:var(--danger-color);border:1px solid rgba(239,68,68,.2)}.hero-section{text-align:center;padding:4rem 0}.hero-title{font-size:4rem;font-weight:800;margin-bottom:1.5rem;background:linear-gradient(135deg,var(--primary-color),var(--accent-color),#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}@media(max-width:768px){.main-content{padding:1rem}h1{font-size:2rem}.card{padding:1.5rem}.message-sent{margin-left:.5rem}.message-received{margin-right:.5rem}.hero-title{font-size:2.5rem}}