:root{--primary: #007AFF;--primary-hover: #0051D5;--success: #34C759;--danger: #FF3B30;--warning: #FF9500;--accent: #00D4FF;--glass-bg: rgba(255, 255, 255, .7);--glass-border: rgba(255, 255, 255, .3);--glass-shadow: rgba(0, 0, 0, .1);--glass-dark: rgba(0, 0, 0, .3);--glass-dark-border: rgba(255, 255, 255, .2);--glass-dark-bg: rgba(20, 20, 30, .7);--glass-message-own: rgba(0, 122, 255, .15);--glass-message-partner: rgba(255, 255, 255, .15);--text-primary: #000000;--text-secondary: rgba(0, 0, 0, .6);--text-tertiary: rgba(0, 0, 0, .4);--text-light: #FFFFFF;--text-on-dark: rgba(255, 255, 255, .9);--text-muted: rgba(255, 255, 255, .6);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .16);--radius-sm: 12px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 32px;--transition: all .3s cubic-bezier(.4, 0, .2, 1);--transition-fast: all .2s cubic-bezier(.4, 0, .2, 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0 4px #007aff1a;transform:translateY(-1px)}.btn{padding:14px 24px;border:none;border-radius:var(--radius-sm);font-size:16px;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 12px #007aff4d}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px #007aff66}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--text-primary);border:1px solid var(--glass-border)}.btn-secondary:hover{background:#ffffffe6;transform:translateY(-2px)}.btn-google{background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--text-primary);border:1px solid var(--glass-border);margin-top:8px}.btn-google:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}.divider{display:flex;align-items:center;text-align:center;margin:24px 0;color:var(--text-secondary);font-size:13px;font-weight:500}.divider:before,.divider:after{content:"";flex:1;border-bottom:1px solid var(--glass-border)}.divider:before{margin-right:12px}.divider:after{margin-left:12px}.toggle-text{text-align:center;margin-top:20px;font-size:14px;color:var(--text-secondary)}.toggle-link{color:var(--primary);font-weight:600;cursor:pointer;margin-left:4px}.toggle-link:hover{text-decoration:underline}.app-container{height:100vh;padding:20px;display:flex;gap:20px;overflow:hidden}.sidebar{width:360px;background:var(--glass-bg);backdrop-filter:blur(40px) saturate(180%);-webkit-backdrop-filter:blur(40px) saturate(180%);border:1px solid 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#00d4ff4d}.btn-icon-danger{background:none;border:none;cursor:pointer;padding:8px;border-radius:50%;transition:var(--transition);color:var(--text-secondary);opacity:0;position:absolute;right:8px;top:50%;transform:translateY(-50%)}.chat-item:hover .btn-icon-danger{opacity:1}.btn-icon-danger:hover{background:#ff3b301a;color:var(--danger);transform:translateY(-50%) scale(1.1)}.chat-header .btn-icon-danger{position:relative;opacity:1;right:auto;top:auto;transform:none}.chat-header .btn-icon-danger:hover{transform:scale(1.1)}.chat-window{flex:1;background:var(--glass-bg);backdrop-filter:blur(40px) saturate(180%);-webkit-backdrop-filter:blur(40px) saturate(180%);border:1px solid var(--glass-border);border-radius:var(--radius-lg);display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow-md);position:relative}.chat-header{padding:20px 24px;border-bottom:1px solid 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12px;border-radius:8px;transition:var(--transition-fast)}.btn-cancel-rec:hover{background:#0000000d;color:var(--text-primary)}.btn-send-rec{width:40px;height:40px;border-radius:50%;background:var(--accent);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);box-shadow:0 4px 12px #00d4ff4d}.btn-send-rec:hover{transform:scale(1.1);box-shadow:0 6px 20px #00d4ff66}.empty-chat{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-secondary)}.empty-icon{color:var(--text-tertiary);margin-bottom:16px;opacity:.5}.empty-text{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-subtext{font-size:15px;color:var(--text-secondary)}.modal-overlay{position:fixed;inset:0;background:#0006;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--glass-bg);-webkit-backdrop-filter:blur(40px) saturate(180%);backdrop-filter:blur(40px) saturate(180%);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:32px;max-width:480px;width:90%;box-shadow:var(--shadow-lg);animation:modalSlide .3s ease}@keyframes modalSlide{0%{opacity:0;transform:translateY(-20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-title{font-size:24px;font-weight:700;color:var(--text-primary);margin-bottom:24px}.form-group{margin-bottom:20px}.form-label{display:block;font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.form-input{width:100%;padding:12px 16px;background:#ffffff80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--radius-sm);font-size:15px;outline:none;transition:var(--transition);color:var(--text-primary)}.form-input::placeholder{color:var(--text-tertiary)}.form-input:focus{background:#fffc;border-color:var(--primary);box-shadow:0 0 0 3px #007aff1a}.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px}.forward-list{max-height:400px;overflow-y:auto;margin-top:16px;display:flex;flex-direction:column;gap:8px}.forward-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition-fast);background:#ffffff4d}.forward-item:hover{background:#007aff1a;transform:translate(4px)}.context-menu{position:fixed;background:var(--glass-bg);-webkit-backdrop-filter:blur(40px) saturate(180%);backdrop-filter:blur(40px) saturate(180%);border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:8px;min-width:200px;box-shadow:var(--shadow-lg);z-index:1000;animation:contextSlide .2s ease}@keyframes contextSlide{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.context-menu>div{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;color:var(--text-primary);transition:var(--transition-fast)}.context-menu>div:hover{background:#007aff1a}.media-overlay{position:fixed;inset:0;background:#000000f2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:center;z-index:2000;animation:fadeIn .3s ease}.media-close-btn{position:absolute;top:24px;right:24px;width:48px;height:48px;border-radius:50%;background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);z-index:10}.media-close-btn:hover{background:#fff3;transform:scale(1.1)}.media-content-image{max-width:90vw;max-height:90vh;border-radius:var(--radius-md);box-shadow:var(--shadow-lg)}.custom-video-wrapper{position:relative;max-width:90vw;max-height:90vh;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-lg)}.custom-video-element{width:100%;height:100%;display:block}.big-play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0000004d;cursor:pointer;transition:var(--transition);color:#fff;opacity:1}.custom-video-wrapper.playing .big-play-overlay{opacity:0;pointer-events:none}.video-controls{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(to top,rgba(0,0,0,.8),transparent);padding:20px;display:flex;align-items:center;gap:12px;transition:var(--transition)}.play-btn{width:40px;height:40px;border-radius:50%;background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}.play-btn:hover{background:#ffffff4d;transform:scale(1.1)}.progress-bar-container{flex:1;height:6px;background:#fff3;border-radius:3px;cursor:pointer;overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .1s linear}.time-display{color:#fff;font-size:13px;font-weight:500;min-width:80px;text-align:center}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0000000d;border-radius:4px}::-webkit-scrollbar-thumb{background:#0003;border-radius:4px;transition:var(--transition)}::-webkit-scrollbar-thumb:hover{background:#0000004d}@media(max-width:1024px){.sidebar{width:300px}.message-bubble{max-width:80%}}@media(max-width:768px){.app-container{padding:0;gap:0}.sidebar{width:100%;border-radius:0}.chat-window,.sidebar.chat-open{display:none}.chat-window.chat-open{display:flex;border-radius:0}}