:root{--bg: #ffffff;--bg-subtle: #f5f5f7;--card: #ffffff;--border: rgba(0, 0, 0, .09);--border-strong: rgba(0, 0, 0, .16);--text: #1d1d1f;--text-2: #6e6e73;--text-3: #86868b;--blue: #2f5fe6;--blue-press: #2247c4;--blue-soft: rgba(47, 95, 230, .1);--danger: #d7263d;--radius: 14px;--radius-sm: 10px;--shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);--font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--grad-brand: linear-gradient(135deg, #5b8cff 0%, #2f5fe6 48%, #7b3ff2 100%);--grad-brand-hover: linear-gradient(135deg, #6d99ff 0%, #3a6bf0 48%, #8a52f6 100%);--violet: #7b3ff2;--glass: rgba(255, 255, 255, .55);--glass-strong: rgba(255, 255, 255, .78);--glass-border: rgba(255, 255, 255, .7);--blur: saturate(180%) blur(22px);--glow: 0 8px 22px rgba(47, 95, 230, .38);--glow-strong: 0 12px 34px rgba(78, 70, 229, .5);--lift: 0 14px 44px rgba(20, 30, 80, 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640px){.chat-layout{flex-direction:column}.chat-sidebar{display:flex;flex-direction:row;align-items:center;gap:8px;width:100%;flex:0 0 auto;height:auto;overflow-x:auto;overflow-y:hidden;border-right:none;border-bottom:1px solid var(--border);padding:10px 12px 10px 62px}.chat-sidebar .btn-block{width:auto;flex:0 0 auto;padding:9px 14px;white-space:nowrap}.chat-list{flex-direction:row;margin-top:0;gap:6px}.chat-list-item{flex:0 0 auto;max-width:150px}.chat-engine{padding-left:12px;gap:8px}.chat-thread{padding:16px 14px}.chat-bubble{max-width:90%}.chat-composer{padding:10px 12px;gap:8px;padding-bottom:max(10px,env(safe-area-inset-bottom))}.chat-attach-btn{padding:0 11px}}.chip{display:inline-flex;align-items:center}.chip-x{margin-left:7px;border:none;background:none;color:var(--danger);font-size:14px;line-height:1;cursor:pointer;padding:0;opacity:.55}.chip-x:hover{opacity:1}.cost-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}.cost-card{padding:18px 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