:root{--bg-primary: #0a0a0f;--bg-secondary: #0d0d14;--bg-tertiary: #13131d;--bg-elevated: #161622;--bg-hover: rgba(255, 255, 255, .04);--bg-active: rgba(255, 255, 255, .07);--bg-glass: rgba(10, 10, 15, .85);--border-subtle: #1a1a1f;--border-medium: #22222e;--border-focus: rgba(168, 85, 247, .55);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--text-link: #818cf8;--accent-1: #6366f1;--accent-2: #a855f7;--accent-3: #f59e0b;--brand-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #f59e0b 100%);--brand-gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, .12) 0%, rgba(168, 85, 247, .12) 50%, rgba(245, 158, 11, .12) 100%);--brand-text-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #f59e0b 100%);--glow-shadow: 0 0 35px -4px rgba(168, 85, 247, .35);--user-bubble-bg: #141420;--user-bubble-border: #22222e;--ai-bubble-bg: transparent;--code-bg: #07070c;--code-header-bg: #0d0d14;--code-border: #1a1a1f;--sidebar-width: 280px;--header-height: 60px;--input-max-width: 820px;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 18px;--radius-full: 9999px;--font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--transition-fast: .15s ease;--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-spring: .4s cubic-bezier(.175, .885, .32, 1.275)}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #f1f5f9;--bg-tertiary: #e2e8f0;--bg-elevated: #ffffff;--bg-hover: rgba(0, 0, 0, .05);--bg-active: rgba(0, 0, 0, .08);--bg-glass: rgba(255, 255, 255, .82);--border-subtle: rgba(0, 0, 0, .08);--border-medium: rgba(0, 0, 0, .14);--border-focus: rgba(99, 102, 241, .5);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--text-link: #2563eb;--gemini-gradient: linear-gradient(135deg, #3b82f6 0%, #7c3aed 50%, #db2777 100%);--gemini-gradient-subtle: linear-gradient(135deg, rgba(59, 130, 246, .08) 0%, rgba(124, 58, 237, 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