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#475569;--color-secondary-light: #64748b;--color-background: #f8fafc;--color-surface: #ffffff;--color-surface-muted: #f1f5f9;--color-surface-elevated: #ffffff;--color-surface-hover: #e2e8f0;--color-text-primary: #0f172a;--color-text-secondary: #475569;--color-text-disabled: #94a3b8;--color-border: #e2e8f0;--color-border-strong: #cbd5e1;--color-divider: #cbd5e1;--color-error: #dc2626;--color-success: #16a34a;--color-warning: #f59e0b;--color-info: #2563eb;--color-error-bg: #ffebee;--color-success-bg: #e8f5e9;--color-info-bg: #eff6ff;--color-primary-alpha-low: rgba(47, 111, 237, .08);--color-primary-alpha-mid: rgba(47, 111, 237, .12);--color-primary-alpha-border: rgba(47, 111, 237, .35);--color-primary-focus-ring: rgba(47, 111, 237, .18);--color-overlay: rgba(0, 0, 0, .5);--color-backdrop: rgba(0, 0, 0, .4);--color-danger-hover: rgba(220, 38, 38, .12);--color-user-message: #cfe3ff;--color-assistant-message: #ffffff;--color-code-background: #0f172a;--color-code-text: #e2e8f0;--spacing-xs: 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ease-in-out;--transition-slow: .35s ease-in-out;--sidebar-width: 280px;--header-height: 64px;--max-content-width: 960px}:root[data-theme=dark]{--color-primary: #7aa2ff;--color-primary-dark: #5b82f6;--color-primary-light: #9db8ff;--color-secondary: #94a3b8;--color-secondary-light: #cbd5f5;--color-background: #0b0f14;--color-surface: #111827;--color-surface-muted: #0f172a;--color-surface-elevated: #1f2937;--color-surface-hover: #1f2a3b;--color-text-primary: #e5e7eb;--color-text-secondary: #9ca3af;--color-text-disabled: #6b7280;--color-border: #1f2937;--color-border-strong: #334155;--color-divider: #334155;--color-error: #f87171;--color-success: #4ade80;--color-warning: #fbbf24;--color-info: #93c5fd;--color-error-bg: rgba(220, 38, 38, .15);--color-success-bg: rgba(22, 163, 74, .15);--color-info-bg: rgba(37, 99, 235, .18);--color-primary-alpha-low: rgba(122, 162, 255, .1);--color-primary-alpha-mid: rgba(122, 162, 255, .16);--color-primary-alpha-border: rgba(122, 162, 255, 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.38)}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:var(--font-family);font-size:var(--font-size-md);line-height:1.6;color:var(--color-text-primary);background-color:var(--color-background);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-surface)}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--border-radius-md)}::-webkit-scrollbar-thumb:hover{background:var(--color-divider)}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark)}button{font-family:inherit;font-size:inherit;border:none;background:none;cursor:pointer;color:inherit}button,a,[role=button]{transition:transform var(--transition-fast),color var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast),opacity 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