:root{--color-primary: #0277BD;--color-primary-hover: #01579B;--color-primary-light: #E1F5FE;--color-background: #FFFFFF;--color-surface: #FFFFFF;--color-surface-grey: #F7F7F8;--color-border: #E0E0E0;--color-text: #263238;--color-text-secondary: rgba(38, 50, 56, .7);--color-text-muted: #6B7A82;--color-user-message: #E1F5FE;--color-ai-message: #F7F7F8;--color-input-background: #FFFFFF;--color-input-border: #E0E0E0;--color-input-focus: #0277BD;--color-danger: #c33;--color-danger-hover: #a22;--color-error-bg: #fee;--color-error-border: #fcc;--color-on-primary: #FFFFFF;--color-overlay: rgba(0, 0, 0, .5);--color-code-bg: rgba(0, 0, 0, .08);--color-pre-bg: rgba(0, 0, 0, .06);--shadow-header: 0 1px 3px rgba(0, 0, 0, .08);--shadow-card: 3px 3px 4px rgba(0, 0, 0, .1);--shadow-input: 3px 3px 8px rgba(0, 0, 0, .1);--shadow-container: 0 2px 12px rgba(0, 0, 0, .1);--shadow-sidebar: -2px 0 8px rgba(0, 0, 0, .2);--color-send-button: #B3D9F5;--font-family: -apple-system, BlinkMacSystemFont, "Segoe 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