.ai-chat-header{z-index:9;flex-shrink:0;min-height:96px;position:fixed;top:0;left:0;right:0;overflow:hidden}.ai-chat-header-blur{pointer-events:none;z-index:1;position:absolute;inset:0}.ai-chat-header-progressive-blur{background:linear-gradient(to bottom, var(--opacity-white-dark) 0%, transparent 100%);width:100%;height:100%}.ai-chat-header-content{z-index:9;justify-content:space-between;align-items:center;gap:var(--space-8);padding:var(--space-16) var(--space-24);display:flex;position:relative}.ai-chat-header-actions{align-items:center;gap:var(--space-4);display:flex}.ai-chat-header-close{border-radius:var(--radius-full);cursor:pointer;width:28px;height:28px;color:var(--neutral-content-secondary);transition:background-color var(--speed-medium) var(--ease-linear), color var(--speed-medium) var(--ease-linear);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.ai-chat-header-close:hover{background-color:var(--neutral-surface-support);color:var(--neutral-content-primary)}