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.2s;display:flex}.history-item:hover{background:#fcfcff;border-color:#c7d2fe;transform:translate(2px)}.history-icon{background:var(--accent-soft);width:42px;height:42px;color:var(--accent);border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;font-size:19px;display:flex}.history-content{flex:1;min-width:0}.history-content strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:16px;display:block;overflow:hidden}.history-content span{color:var(--text-muted);margin-top:3px;font-size:13px;display:block}.history-arrow{color:var(--text-muted);font-size:22px}.sidebar-overlay{display:none}.menu-button{border:1px solid var(--border);width:42px;height:42px;color:var(--text);background:#fff;border-radius:10px;font-size:20px}@media (width<=1100px){.page{padding:40px 30px 60px}.document-grid{grid-template-columns:repeat(2,1fr)}.quick-grid,.recent-grid{grid-template-columns:1fr}.hero h1{font-size:36px}}@media (width<=820px){.sidebar{box-shadow:var(--shadow-lg);transition:transform .25s;transform:translate(-100%)}.sidebar.sidebar-open{transform:translate(0)}.close-sidebar{color:#fff;background:#ffffff14;border:0;border-radius:9px;justify-content:center;align-items:center;width:36px;height:36px;font-size:23px;display:flex;position:absolute;top:23px;right:17px}.sidebar-overlay{z-index:20;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0f172a73;display:block;position:fixed;inset:0}.main-area{width:100%;margin-left:0}.mobile-header{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;height:68px;padding:0 20px;display:flex}.mobile-brand{color:var(--secondary);align-items:center;gap:8px;font-size:16px;font-weight:800;display:flex}.mobile-brand span{color:var(--accent)}.hero{padding:30px}.hero-orb{width:100px;height:100px}.hero-orb span{font-size:38px}.chat-page-header{flex-direction:column;align-items:flex-start}}@media (width<=620px){.page{padding:28px 17px 45px}.page-heading{flex-direction:column;align-items:flex-start}.page-heading h1,.chat-page-header h1{font-size:30px}.hero{min-height:auto;padding:26px 22px}.hero h1{font-size:32px}.hero p{font-size:15px}.hero-orb{display:none}.home-chat-card{flex-direction:column;align-items:flex-start;padding:22px}.home-chat-card .primary-button{width:100%}.quick-grid,.recent-grid,.document-grid{grid-template-columns:1fr}.upload-card{flex-direction:column;padding:22px}.document-context{flex-direction:column;align-items:flex-start}.document-context select{width:100%;min-width:0}.conversation-area{min-height:360px}.empty-chat{min-height:360px;padding:35px 18px}.message-list{padding:18px 13px}.message-bubble{max-width:82%;font-size:15px}.composer{padding:11px}.auth-card{padding:30px 23px}.auth-card h1{font-size:29px}}@media (width<=430px){.page{padding-left:13px;padding-right:13px}.mobile-header{padding:0 14px}.primary-button,.secondary-button,.file-picker{min-height:44px;font-size:14px}.hero h1{font-size:29px}.section-title h2{font-size:20px}.message-avatar{width:30px;height:30px}.message-bubble{max-width:84%;padding:13px 14px}.auth-screen{padding:15px}.auth-card{padding:27px 20px}}