.demo-container{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin:40px 0;min-height:320px;}.demo-column{border:1px solid var(--border-light);border-radius:8px;overflow:hidden;background:var(--bg-subtle);}.demo-header{padding:12px 16px;font-weight:bold;text-transform:uppercase;font-size:0.75rem;letter-spacing:0.1em;border-bottom:2px solid;text-align:center;}.demo-user .demo-header{color:var(--bg);background:var(--primary);border-color:var(--primary);}.demo-ai .demo-header{color:var(--bg);background:var(--primary);border-color:var(--primary);opacity:0.85;}.demo-system .demo-header{color:var(--bg);background:var(--primary);border-color:var(--primary);opacity:0.7;}.demo-content{padding:16px;font-size:0.85rem;line-height:1.6;min-height:240px;color:#f1f5f9;}.demo-content p{margin:0 0 8px;opacity:0;transform:translateY(8px);animation:demo-fade-in 0.3s forwards;}.demo-content .demo-check{color:#86efac;font-weight:bold;}.demo-content .demo-warn{color:#fde68a;font-weight:bold;}.demo-content .demo-cmd{font-family:monospace;background:rgba(255,255,255,0.1);padding:2px 6px;border-radius:3px;color:var(--primary);}.demo-controls{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:24px 0;}.demo-btn{padding:10px 16px;border:1px solid var(--primary);background:transparent;color:var(--primary);cursor:pointer;border-radius:4px;font-size:0.85rem;transition:background 0.2s,color 0.2s;display:flex;flex-direction:column;align-items:center;gap:2px;min-width:140px;}.demo-btn strong{font-size:0.85rem;}.demo-btn small{font-size:0.65rem;opacity:0.7;}.demo-btn:hover,.demo-btn.active{background:var(--primary);color:var(--bg);}.demo-btn:hover small,.demo-btn.active small{opacity:1;}@keyframes demo-fade-in{to{opacity:1;transform:translateY(0);}}@media (max-width:768px){.demo-container{grid-template-columns:1fr;min-height:auto;}.demo-content{min-height:120px;}}