:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,Roboto,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--primary-color: #25d366;--primary-dark: #128c7e;--primary-light: #34e877;--secondary-color: #075e54;--bg-color: #efeae2;--surface-color: #ffffff;--text-color: #111b21;--text-secondary: #667781;--incoming-msg-bg: #ffffff;--outgoing-msg-bg: #d9fdd3;--input-bg: #f0f2f5;--border-color: #e9edef;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .08);--shadow-md: 0 2px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:dark){:root{--bg-color: #0b141a;--surface-color: #202c33;--text-color: #e9edef;--text-secondary: #8696a0;--incoming-msg-bg: #202c33;--outgoing-msg-bg: #005c4b;--input-bg: #2a3942;--border-color: #2a3942;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 2px 8px rgba(0, 0, 0, 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