:root{--bg-primary: #212121;--bg-secondary: #2f2f2f;--bg-tertiary: #3a3a3a;--bg-hover: #404040;--bg-active: #4a4a4a;--text-primary: #ececec;--text-secondary: #8e8ea0;--border: #444444;--accent: #10a37f;--accent-hover: #0d8c6d;--sidebar-width: 280px;--header-height: 52px;--safe-bottom: env(safe-area-inset-bottom, 0px);--user-bubble: #10a37f;--user-text: #ffffff;--shadow: rgba(0,0,0,.3)}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f7f7f8;--bg-tertiary: #ececf1;--bg-hover: #e8e8ec;--bg-active: #d9d9e3;--text-primary: #1a1a2e;--text-secondary: #6e6e80;--border: #e5e5e5;--user-bubble: #10a37f;--user-text: #ffffff;--shadow: rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;overscroll-behavior:none;transition:background .3s,color .3s;font-size:var(--app-fs, 15px)}body{overflow:hidden;position:fixed;width:100%;height:100%}#app{height:100%}a{color:var(--accent)}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}html{overflow:hidden}