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h2{color:#1f2933;font-size:22px}@media(max-width:860px){.app{padding:16px}.topbar{align-items:flex-start;flex-direction:column}.topbar-actions{justify-content:flex-start;width:100%}h1{font-size:32px}.workspace,.welcome-panel{grid-template-columns:1fr}.ambient-card{min-height:160px}.setup-panel,.chat-shell,.empty-chat{min-height:auto}.chat-shell,.empty-chat{height:70vh}}