:root{--bg:#070b10;--card-bg:#0d1117;--teal:#00bfa6;--teal-hover:#00e5c3;--text:#fff;--text-secondary:#8b949e;--border:#21262d;--input-bg:#161b22;--online-green:#2ea043;--offline-gray:#484f58;--danger-red:#f85149;--teal-glow:rgba(0,191,166,.15);--shadow-lg:0 8px 30px rgba(0,0,0,.4);--shadow-md:0 4px 16px rgba(0,0,0,.3);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:9999px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.5;overflow-x:hidden;min-height:100vh}a{color:var(--teal);text-decoration:none;transition:color .2s ease}a:hover{color:var(--teal-hover)}img{max-width:100%;height:auto}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--offline-gray)}::selection{background-color:rgba(0,191,166,.3);color:var(--text)}:focus-visible{outline:2px solid var(--teal);outline-offset:2px}@keyframes spin{to{transform:rotate(1turn)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInScale{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes slideInRight{0%{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translateX(-20px)}to{opacity:1;transform:translateX(0)}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes typingBounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}@keyframes ripple{0%{transform:scale(0);opacity:.5}to{transform:scale(4);opacity:0}}@keyframes shimmer{0%{background-position:-200px 0}to{background-position:calc(200px + 100%) 0}}@keyframes glow{0%,to{box-shadow:0 0 5px rgba(0,191,166,.2)}50%{box-shadow:0 0 20px rgba(0,191,166,.4)}}@keyframes callPulse{0%{box-shadow:0 0 0 0 rgba(0,191,166,.4)}70%{box-shadow:0 0 0 20px rgba(0,191,166,0)}to{box-shadow:0 0 0 0 rgba(0,191,166,0)}}@keyframes shake{0%,to{transform:translateX(0)}10%,30%,50%,70%,90%{transform:translateX(-4px)}20%,40%,60%,80%{transform:translateX(4px)}}.animate-fade-in{animation:fadeIn .3s ease-out}.animate-fade-in-up{animation:fadeInUp .4s ease-out}.animate-fade-in-scale{animation:fadeInScale .3s ease-out}.animate-slide-right{animation:slideInRight .3s ease-out}.animate-slide-left{animation:slideInLeft .3s ease-out}.animate-pulse{animation:pulse 2s ease-in-out infinite}.animate-glow{animation:glow 2s ease-in-out infinite}.animate-call-pulse{animation:callPulse 1.5s infinite}.animate-shake{animation:shake .5s ease-in-out}.glass-card{background:rgba(13,17,23,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.glass-card-hover:hover{border-color:rgba(0,191,166,.3);box-shadow:0 4px 20px rgba(0,191,166,.08)}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);border:none;background-color:var(--teal);color:#000;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 12px rgba(0,191,166,.25)}.btn-primary:hover{background-color:var(--teal-hover);box-shadow:0 6px 20px rgba(0,191,166,.35);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);border:1px solid var(--border);background-color:var(--input-bg);color:var(--text);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-secondary:hover{border-color:var(--teal);color:var(--teal)}.btn-danger{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);border:none;background-color:rgba(248,81,73,.1);color:var(--danger-red);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-danger:hover{background-color:rgba(248,81,73,.2)}.btn-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);border:none;background-color:var(--input-bg);color:var(--text-secondary);font-size:18px;cursor:pointer;transition:all .2s ease}.btn-icon:hover{background-color:var(--teal);color:#000}.input{width:100%;padding:12px 16px;border-radius:var(--radius-md);border:1px solid var(--border);background-color:var(--input-bg);color:var(--text);font-size:14px;outline:none;transition:border-color .2s ease,box-shadow .2s ease;font-family:inherit}.input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,191,166,.1)}.input::placeholder{color:var(--offline-gray)}.badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;border-radius:10px;padding:0 6px;font-size:11px;font-weight:700}.badge-teal{background-color:var(--teal);color:#000}.badge-red{background-color:var(--danger-red);color:var(--text)}.badge-green{background-color:var(--online-green);color:var(--text)}.status-dot{width:10px;height:10px;border-radius:50%;display:inline-block;flex-shrink:0}.status-dot-online{background-color:var(--online-green);box-shadow:0 0 6px rgba(46,160,67,.5)}.status-dot-offline{background-color:var(--offline-gray)}.status-dot-bordered{border:2px solid var(--card-bg)}.avatar{border-radius:50%;object-fit:cover;flex-shrink:0}.avatar-sm{width:32px;height:32px}.avatar-md{width:44px;height:44px}.avatar-lg{width:64px;height:64px}.avatar-xl{width:90px;height:90px}.avatar-bordered{border:2px solid var(--border)}.avatar-teal{border:2px solid var(--teal)}.avatar-placeholder{display:flex;align-items:center;justify-content:center;border-radius:50%;font-weight:700;color:var(--text);background:linear-gradient(135deg,var(--teal),#08c);flex-shrink:0}.skeleton{background:linear-gradient(90deg,var(--card-bg) 25%,var(--input-bg) 50%,var(--card-bg) 75%);background-size:200px 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}.skeleton-circle{border-radius:50%}.skeleton-text{height:14px;margin-bottom:8px}.skeleton-text-sm{height:10px;width:60%}.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);padding:12px 24px;border-radius:var(--radius-md);font-size:14px;font-weight:500;z-index:10000;animation:fadeInUp .3s ease-out;box-shadow:var(--shadow-lg)}.toast-success{background-color:rgba(0,191,166,.15);border:1px solid rgba(0,191,166,.3);color:var(--teal)}.toast-error{background-color:rgba(248,81,73,.15);border:1px solid rgba(248,81,73,.3);color:var(--danger-red)}.toast-info{background-color:rgba(56,132,255,.15);border:1px solid rgba(56,132,255,.3);color:#3884ff}.message-sent{background-color:var(--teal);color:#000;border-radius:16px 16px 4px 16px;align-self:flex-end}.message-received{color:var(--text);border:1px solid var(--border);border-radius:16px 16px 16px 4px;align-self:flex-start}.message-received,.tab-bar{background-color:var(--card-bg)}.tab-bar{display:flex;border-bottom:1px solid var(--border)}.tab-item{flex:1 1;padding:14px 8px;text-align:center;font-size:13px;font-weight:600;color:var(--text-secondary);background:none;border:none;cursor:pointer;position:relative;transition:color .2s ease}.tab-item:hover{color:var(--text)}.tab-item-active{color:var(--teal)}.tab-item-active:after{content:"";position:absolute;bottom:0;left:20%;right:20%;height:2px;background-color:var(--teal);border-radius:2px 2px 0 0}.bottom-nav{display:flex;border-top:1px solid var(--border);background-color:var(--card-bg);padding-bottom:env(safe-area-inset-bottom,0)}.nav-item{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px 0;font-size:11px;font-weight:600;color:var(--text-secondary);background:none;border:none;cursor:pointer;transition:color .2s ease}.nav-item-active{color:var(--teal)}.nav-item:hover{color:var(--text)}.call-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(7,11,16,.95);-webkit-backdrop-filter:blur(30px);backdrop-filter:blur(30px);flex-direction:column;z-index:9999;animation:fadeIn .3s ease-out}.call-avatar-ring,.call-overlay{display:flex;align-items:center;justify-content:center}.call-avatar-ring{width:120px;height:120px;border-radius:50%;border:3px solid var(--teal);animation:callPulse 1.5s infinite;margin-bottom:24px}.call-actions{display:flex;gap:40px;margin-top:40px}.call-btn-accept{width:64px;height:64px;border-radius:50%;border:none;background-color:var(--online-green);color:#fff;font-size:28px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(46,160,67,.4);transition:transform .2s ease}.call-btn-accept:hover{transform:scale(1.1)}.call-btn-reject{width:64px;height:64px;border-radius:50%;border:none;background-color:var(--danger-red);color:#fff;font-size:28px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(248,81,73,.4);transition:transform .2s ease}.call-btn-reject:hover{transform:scale(1.1)}.video-container{position:relative;width:100%;height:100vh;background-color:#000;overflow:hidden}.video-remote{width:100%;height:100%;object-fit:cover}.video-local{position:absolute;bottom:100px;right:20px;width:120px;height:160px;border-radius:var(--radius-lg);object-fit:cover;border:2px solid var(--border);box-shadow:var(--shadow-lg);z-index:10}.video-controls{position:absolute;bottom:0;left:0;right:0;gap:16px;padding:24px;background:linear-gradient(transparent,rgba(0,0,0,.8));z-index:10}.video-control-btn,.video-controls{display:flex;align-items:center;justify-content:center}.video-control-btn{width:52px;height:52px;border-radius:50%;border:none;background-color:hsla(0,0%,100%,.15);color:#fff;font-size:22px;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.video-control-btn:hover{background-color:hsla(0,0%,100%,.25)}.video-control-btn-active{background-color:var(--teal);color:#000}.video-control-btn-danger{background-color:var(--danger-red);width:60px;height:60px}.video-control-btn-danger:hover{background-color:#ff6b6b}@media (max-width:480px){.glass-card{border-radius:var(--radius-md)}}@media (min-width:768px){body{display:flex;justify-content:center}}.typing-dots{display:flex;align-items:center;gap:4px;padding:4px 0}.typing-dot{width:6px;height:6px;border-radius:50%;background-color:var(--text-secondary);animation:typingBounce 1.4s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}.transition-all{transition:all .2s ease}.transition-colors{transition:color .2s ease,background-color .2s ease,border-color .2s ease}.transition-transform{transition:transform .2s ease}.hover-lift:hover{transform:translateY(-2px)}.hover-glow:hover{box-shadow:0 0 16px var(--teal-glow)}