.app{width:100%;height:100vh;overflow:hidden}:root{--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #ffffff;--bg-hover: rgba(0, 0, 0, .04);--bg-active: rgba(0, 136, 204, .08);--bg-input: #f0f2f5;--bg-chat: #e8e8e8;--text-primary: #000000;--text-secondary: #5c5c5c;--text-tertiary: #999999;--border-color: #e5e7eb;--accent-color: #0088cc;--accent-light: #a8d8ff;--error-color: #e74c3c;--success-color: #4fc3f7;--own-message-bg: #daf5c5;--own-message-text: #000000;--other-message-bg: #ffffff;--other-message-text: #000000;--message-shadow: rgba(0, 0, 0, .08);--date-separator-bg: rgba(255, 255, 255, .9)}.dark-mode{--bg-primary: #17212b;--bg-secondary: #0e1621;--bg-tertiary: #1f2d3d;--bg-hover: rgba(255, 255, 255, .04);--bg-active: rgba(0, 136, 204, .15);--bg-input: #1f2d3d;--bg-chat: #0e1621;--text-primary: #ffffff;--text-secondary: #a2b4c6;--text-tertiary: #6c7a89;--border-color: #1f2d3d;--accent-color: #0088cc;--accent-light: #2a4b6a;--error-color: #e74c3c;--success-color: #4fc3f7;--own-message-bg: #2a5170;--own-message-text: #ffffff;--other-message-bg: #182533;--other-message-text: #ffffff;--message-shadow: rgba(0, 0, 0, .2);--date-separator-bg: rgba(23, 33, 43, .9)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:14px;line-height:1.5}#app{width:100%;height:100%}h1,h2,h3,h4,h5,h6{font-weight:500}a{color:var(--accent-color);text-decoration:none}button,input,textarea{font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}::selection{background:#0088cc4d}:focus-visible{outline:2px solid var(--accent-color);outline-offset:2px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes messageSlideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.toast{position:fixed;bottom:20px;right:20px;padding:12px 20px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:10px;box-shadow:0 4px 16px #00000026;animation:slideIn .3s ease}.toast.success{border-left:4px solid var(--success-color)}.toast.error{border-left:4px solid var(--error-color)}