:root{color-scheme:light;--brand-orange: #E85D2F;--brand-orange-light: #F47B55;--brand-orange-pale: #FEF0EB;--chat-bg: #F9F7F5;--results-bg: #F2F3F5;--card-bg: #FFFFFF;--border: #E4E6EA;--border-strong: #D1D5DB;--text-primary: #111827;--text-secondary: #4B5563;--text-tertiary: #9CA3AF;--tag-bg: #EEF0F3;--tag-text: #374151;--shadow-card: 0 1px 3px rgb(0 0 0 / .06), 0 4px 16px rgb(0 0 0 / .06);--shadow-card-hover: 0 4px 8px rgb(0 0 0 / .08), 0 16px 32px rgb(0 0 0 / .1);--shadow-button: 0 2px 8px rgb(232 93 47 / .35);--radius-card: 16px;--radius-tag: 20px;--brand: var(--brand-orange);--brand-hover: #D4491D;--brand-light: var(--brand-orange-pale);--gray-50: #FAFAFB;--gray-100: var(--tag-bg);--gray-200: var(--border);--gray-300: var(--border-strong);--gray-400: var(--text-tertiary);--gray-500: #6B7280;--gray-600: var(--text-secondary);--gray-700: var(--tag-text);--gray-800: #1F2937;--gray-900: var(--text-primary);--rail-bg: var(--chat-bg);--rail-line: #EDE7E2;--query-bg: 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