:root{--bg-app: #f0f2f5;--bg-primary: #ffffff;--bg-secondary: #f0f2f5;--bg-chat: #efeae2;--bg-chat-pattern: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5L35 15L45 15L37 22L40 32L30 26L20 32L23 22L15 15L25 15Z' fill='%23d1d7db' fill-opacity='0.4'/%3E%3C/svg%3E");--text-primary: #111b21;--text-secondary: #667781;--text-muted: #8696a0;--accent: #00a884;--accent-hover: #06cf9c;--danger: #ea0038;--border-color: #e9edef;--border-light: rgba(0, 0, 0, .08);--bubble-own: #d9fdd3;--bubble-other: #ffffff;--bubble-system: rgba(255, 255, 255, .9);--input-bg: #f0f2f5;--input-bg-active: #ffffff;--header-bg: #f0f2f5;--hover-bg: #f5f6f6;--shadow-light: rgba(0, 0, 0, .08);--shadow-medium: rgba(0, 0, 0, .15);--scrollbar-thumb: rgba(0, 0, 0, .2);--icon-color: #54656f;--icon-color-active: #00a884;--check-color: #53bdeb;--overlay-bg: rgba(0, 0, 0, .4)}[data-theme=dark]{--bg-app: #0b141a;--bg-primary: #111b21;--bg-secondary: #202c33;--bg-chat: #0b141a;--bg-chat-pattern: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5L35 15L45 15L37 22L40 32L30 26L20 32L23 22L15 15L25 15Z' fill='%231e2a30' fill-opacity='0.6'/%3E%3C/svg%3E");--text-primary: #e9edef;--text-secondary: #8696a0;--text-muted: #667781;--accent: #00a884;--accent-hover: #06cf9c;--danger: #f15c6d;--border-color: #222d34;--border-light: rgba(255, 255, 255, .08);--bubble-own: #005c4b;--bubble-other: #202c33;--bubble-system: rgba(32, 44, 51, .9);--input-bg: #2a3942;--input-bg-active: #2a3942;--header-bg: #202c33;--hover-bg: #2a3942;--shadow-light: rgba(0, 0, 0, .2);--shadow-medium: rgba(0, 0, 0, .3);--scrollbar-thumb: rgba(255, 255, 255, .2);--icon-color: #aebac1;--icon-color-active: #00a884;--check-color: #53bdeb;--overlay-bg: rgba(0, 0, 0, .6)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-app);color:var(--text-primary);overflow:hidden;transition:background-color .3s ease,color .3s ease}html,body{height:100%}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}::-webkit-scrollbar-track{background:transparent}