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(max-width:760px){.chat-viewer{grid-template-columns:1fr;height:auto}.chat-list{max-height:280px}}.modal-backdrop{z-index:50;background:#000000b3;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.modal-card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:14px;width:100%;max-width:420px;padding:24px}.modal-title{color:var(--text);margin:0 0 14px;font-size:16px;font-weight:300}.modal-body{color:var(--text-secondary);margin:0 0 16px;font-size:13px;line-height:1.55}.modal-buttons{justify-content:flex-end;gap:8px;margin-top:14px;display:flex}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}