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var(--tkc-transition);overflow-y:hidden}.tkc-chat-input--expanded{max-height:50vh;overflow-y:auto}.tkc-chat-input::placeholder{color:hsl(var(--tkc-ink-4))}.tkc-chat-send-btn{width:2.5rem;height:2.5rem;padding:0;border-radius:var(--tkc-radius-md);color:white;transition:background-color var(--tkc-transition)}.tkc-chat-typing{display:flex;align-items:center;gap:.5rem;font-size:.8125rem;color:hsl(var(--tkc-ink-3));padding:.5rem .75rem;margin-bottom:.5rem}.tkc-chat-typing-dots{display:flex;gap:.25rem}.tkc-chat-typing-dot{width:.375rem;height:.375rem;border-radius:50%;background:hsl(var(--tkc-ink-4));animation:tkc-chat-typing 1.5s infinite}.tkc-chat-typing-dot:nth-child(2){animation-delay:.2s}.tkc-chat-typing-dot:nth-child(3){animation-delay:.4s}@keyframes tkc-chat-typing{0%,60%,to{opacity:.3;transform:scale(.8)}30%{opacity:1;transform:scale(1)}}.tkc-chat-sidebar{width:16rem;background:hsl(var(--tkc-surface))}.tkc-chat-sidebar-header{padding:.75rem}.tkc-chat-sidebar-title{font-size:.8125rem;font-weight:500;margin:0}.tkc-chat-conversation{padding:.5rem;border-radius:var(--tkc-radius-sm);transition:background-color var(--tkc-transition)}.tkc-chat-conversation-title{font-size:.8125rem;margin:0 0 .25rem}.tkc-chat-conversation-preview{margin:0}.tkc-chat-usage{background:hsl(var(--tkc-surface));border-bottom:1px solid hsl(var(--tkc-border-subtle))}.tkc-chat-usage-bar{width:100%;height:.125rem;border-radius:var(--tkc-radius-xs);margin-top:.25rem}.tkc-chat-usage-fill{transition:width var(--tkc-transition)}@media (max-width:768px){.tkc-chat-message{max-width:95%}.tkc-chat-sidebar{position:absolute;top:0;left:0;height:100%;z-index:10;box-shadow:var(--tkc-shadow-lg)}.tkc-chat-input-area{padding:.75rem}.tkc-chat-messages-inner{padding:.75rem .75rem .25rem}}.tkc-theme[data-theme=light]{--tkc-bg:210 30% 98%;--tkc-surface:0 0% 100%;--tkc-surface-elevated:210 25% 99%;--tkc-surface-interactive:210 35% 96%;--tkc-surface-pressed:210 30% 94%;--tkc-muted:210 30% 96%;--tkc-border:214 15% 88%;--tkc-border-subtle:212 20% 92%;--tkc-ink:216 25% 15%;--tkc-ink-2:214 20% 35%;--tkc-ink-3:212 15% 55%;--tkc-ink-4:210 12% 70%;--tkc-primary:199 85% 38%;--tkc-primary-hover:199 88% 34%;--tkc-secondary:270 75% 55%;--tkc-accent:258 55% 48%;--tkc-success:142 50% 32%;--tkc-warning:38 80% 45%;--tkc-danger:0 70% 48%;--background:var(--tkc-bg);--foreground:var(--tkc-ink);--card:var(--tkc-surface-elevated);--card-foreground:var(--tkc-ink);--popover:var(--tkc-surface-elevated);--popover-foreground:var(--tkc-ink);--primary:var(--tkc-primary);--primary-foreground:0 0% 100%;--secondary:var(--tkc-secondary);--secondary-foreground:0 0% 100%;--muted:var(--tkc-muted);--muted-foreground:var(--tkc-ink-3);--accent:var(--tkc-accent);--accent-foreground:0 0% 100%;--destructive:var(--tkc-danger);--destructive-foreground:0 0% 98%;--border:var(--tkc-border);--input:var(--tkc-border);--ring:var(--tkc-primary);color:hsl(var(--tkc-ink))!important;background:hsl(var(--tkc-bg))!important;color-scheme:light;--hero-bg:#FFFFFF;--hero-text-primary:#0F172A;--hero-text-secondary:#475569;--hero-text-muted:#64748B;--hero-accent:hsl(var(--tkc-primary));--hero-accent-weak:hsla(var(--tkc-primary),0.20);--hero-accent-bg-weak:hsla(var(--tkc-primary),0.08);--hero-border-subtle:#E2E8F0;--hero-bg-glass:rgba(255,255,255,0.70);--hero-demo-bg:rgba(0,0,0,0.03);--hero-demo-border:rgba(15,23,42,0.08);--hero-demo-progress-bg:rgba(15,23,42,0.12)}.tkc-theme body{background:hsl(var(--tkc-bg))!important;color:hsl(var(--tkc-ink))!important}.tkc-theme .tkc-card{background:hsl(var(--tkc-surface-elevated)/.95);backdrop-filter:blur(8px) saturate(120%);border:1px solid hsl(var(--tkc-border));border-radius:var(--tkc-radius-lg);box-shadow:var(--tkc-shadow-md);transition:all 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.chat-message-user{background:linear-gradient(135deg,hsl(var(--tkc-primary)) 0,hsl(var(--tkc-secondary)) 100%);color:white;border-radius:1.25rem;padding:.75rem 1rem;max-width:70%;margin-left:auto}.tkc-theme .chat-message-assistant{background:hsl(var(--tkc-muted));color:hsl(var(--tkc-ink));border-radius:1.25rem;padding:.75rem 1rem;max-width:70%;border:1px solid hsl(var(--tkc-border-subtle))}.tkc-theme .chat-input-area{background:hsl(var(--tkc-surface)/.8);backdrop-filter:blur(8px);border-top:1px solid hsl(var(--tkc-border));padding:1rem}.tkc-theme .gradient-avatar{background:linear-gradient(135deg,hsl(var(--tkc-primary)) 0,hsl(var(--tkc-secondary)) 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;font-weight:600}.tkc-theme .glass-card{background:hsl(var(--tkc-surface-elevated)/.85);backdrop-filter:blur(16px) saturate(120%);border:1px solid hsl(var(--tkc-border)/.5);border-radius:var(--tkc-radius-lg);box-shadow:var(--tkc-shadow-lg)}.tkc-theme 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