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16px;--radius-xl: 24px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease}[data-theme=dark]{--bg: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #263349;--text: #f1f5f9;--text-muted: #94a3b8;--text-light: #64748b;--accent: #818cf8;--accent-hover: #a5b4fc;--accent-light: rgba(129, 140, 248, .12);--accent-glow: rgba(129, 140, 248, .3);--border: #334155;--border-light: #1e293b;--card-bg: #1e293b;--card-hover: #263349;--card-shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 1px 2px rgba(0, 0, 0, .2);--card-shadow-hover: 0 10px 25px rgba(0, 0, 0, .4), 0 4px 10px rgba(0, 0, 0, .3);--header-bg: rgba(15, 23, 42, .88);--gradient-text: linear-gradient(135deg, #818cf8, #a78bfa, #c4b5fd);--gradient-accent: linear-gradient(135deg, #818cf8, #a78bfa);--gradient-surface: linear-gradient(135deg, rgba(129, 140, 248, .08), rgba(167, 139, 250, .08));--code-bg: #1e293b;--code-text: #e2e8f0;--blockquote-border: #818cf8;--blockquote-bg: rgba(129, 140, 248, .06);--selection-bg: 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