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600px){.app-container{max-width:500px;height:100vh}}.chat-bg-pattern{position:absolute;top:0;left:0;right:0;bottom:0;opacity:.06;background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");pointer-events:none;z-index:0}.chat-header{background:var(--bg-header);padding:10px 16px;padding-top:max(10px,env(safe-area-inset-top,10px));display:flex;align-items:center;gap:12px;min-height:60px;flex-shrink:0;z-index:10}.header-avatar{display:flex;align-items:baseline;gap:0;padding:0 4px}.logo-script{font-family:Great 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