*{margin:0;padding:0;box-sizing:border-box}body{font-family:Poppins,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6}#root{min-height:100vh}.loading-indicator{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;width:100%;background-color:var(--bg-color)}.spinner{width:50px;height:50px;border:5px solid rgba(0,0,0,.1);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s ease-in-out infinite;margin-bottom:20px}:root{--primary-color: #6366f1;--secondary-color: #8b5cf6;--accent-color: #06b6d4;--success-color: #10b981;--danger-color: #ef4444;--text-color: #1f2937;--light-text: #6b7280;--card-bg: #ffffff;--bg-color: #f9fafb;--border-radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}body{margin:0;font-family:Poppins,sans-serif;background-color:var(--bg-color)}.loading-indicator{position:fixed;inset:0;background-color:#fffc;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:9999}.spinner{width:50px;height:50px;border:5px solid var(--primary-color);border-radius:50%;border-top-color:transparent;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{to{transform:rotate(360deg)}}.auth-container{display:flex;width:100%;height:100vh}.auth-image{flex:1;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));display:flex;flex-direction:column;justify-content:center;align-items:center;color:#fff;padding:40px}.auth-image h1{font-size:2.5rem;margin-bottom:20px;font-weight:600}.auth-image p{font-size:1.1rem;max-width:400px;text-align:center;margin-bottom:30px;line-height:1.6}.features{display:flex;flex-direction:column;gap:15px;width:100%;max-width:400px}.feature-item{display:flex;align-items:center;background-color:#ffffff1a;padding:15px;border-radius:10px}.feature-icon{font-size:1.5rem;margin-right:15px}.feature-text{font-weight:500}.auth-form{flex:1;display:flex;justify-content:center;align-items:center;padding:20px}.form-container{background-color:var(--card-bg);padding:40px;border-radius:var(--border-radius);box-shadow:var(--shadow);width:100%;max-width:400px}.app-logo{display:flex;align-items:center;justify-content:center;margin-bottom:20px}.app-logo i{font-size:2rem;color:var(--primary-color);margin-right:10px}.app-logo span{font-size:1.8rem;font-weight:600;color:var(--text-color)}.form-header{text-align:center;margin-bottom:30px}.form-header h2{font-size:1.8rem;color:var(--text-color);margin-bottom:10px;font-weight:600}.form-header p{color:var(--light-text);font-size:.9rem}.form-group{margin-bottom:20px;position:relative}.form-group label{display:block;margin-bottom:8px;font-size:.9rem;color:var(--text-color);font-weight:500}.input-with-icon{position:relative}.input-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--light-text)}.form-control{width:100%;padding:12px 15px 12px 40px;border:1px solid #e5e7eb;border-radius:8px;font-size:14px;font-family:Poppins,sans-serif;transition:all .3s;box-sizing:border-box}.form-control:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f133}.toggle-password{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--light-text);cursor:pointer}.btn{width:100%;padding:12px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;font-family:Poppins,sans-serif}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--accent-color)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.form-footer{text-align:center;margin-top:25px;color:var(--light-text);font-size:.9rem}.form-link{color:var(--primary-color);cursor:pointer;font-weight:500}.form-link:hover{text-decoration:underline}@media (max-width: 1024px){.auth-image{display:none}}@media (max-width: 768px){.form-container{padding:25px;max-width:90%}.app-logo i{font-size:1.8rem}.app-logo span,.form-header h2{font-size:1.6rem}}@media (max-width: 480px){.auth-form{padding:15px}.form-container{padding:20px;max-width:100%}.app-logo i{font-size:1.6rem}.app-logo span,.form-header h2{font-size:1.4rem}.form-group{margin-bottom:15px}.form-group label{margin-bottom:5px}}#header{background-color:var(--primary-color);color:#fff;display:flex;justify-content:space-between;align-items:center;padding:15px 25px;box-shadow:var(--shadow)}#header h1{margin:0;font-weight:600;display:flex;align-items:center}#header h1 i{margin-right:10px}#logoutBtn{background-color:#fff3;color:#fff;border:none;padding:8px 16px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;display:flex;align-items:center;transition:all .2s ease}#logoutBtn:hover{background-color:#ffffff4d}#logoutBtn i{margin-right:6px}#mainContent{display:flex;flex:1;padding:20px;gap:20px;overflow:hidden;height:calc(100vh - 70px)}#leftPanel{width:30%;display:flex;flex-direction:column;background-color:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow);overflow:hidden}#friendsSection{flex:1;overflow-y:auto;padding:20px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}h2{color:var(--text-color);font-weight:600;font-size:1.2rem}.badge{background-color:var(--secondary-color);color:#fff;border-radius:20px;padding:2px 8px;font-size:.8rem}#friendRequestBtn{padding:15px;text-align:center;background-color:var(--accent-color);color:#fff;border:none;cursor:pointer;font-weight:500;transition:background-color .3s;display:flex;align-items:center;justify-content:center}#friendRequestBtn:hover{background-color:var(--primary-color)}#friendRequestBtn i{margin-right:8px}#requestsSection{max-height:0;overflow-y:auto;transition:max-height .3s ease;background-color:#f9fafb}#requestsSection.show{max-height:300px;padding:15px}#rightPanel{width:70%;display:flex;flex-direction:column}#searchSection{display:flex;align-items:center;background-color:var(--card-bg);padding:20px;border-radius:var(--border-radius);box-shadow:var(--shadow);margin-bottom:20px}.search-container{position:relative;width:100%;max-width:400px;margin-right:auto}#friendNumber{width:100%;padding:12px 15px 12px 40px;border:1px solid #e5e7eb;border-radius:8px;font-size:14px;transition:all .3s}#friendNumber:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f133}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--light-text)}#sendRequestBtn{padding:12px 20px;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;transition:all .2s;display:flex;align-items:center}#sendRequestBtn:hover{background-color:var(--accent-color)}#sendRequestBtn i{margin-right:8px}.welcome-container{background-color:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow);padding:30px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%}.welcome-icon{font-size:4rem;color:var(--primary-color);margin-bottom:20px}.welcome-title{font-size:1.8rem;font-weight:600;margin-bottom:15px;color:var(--text-color)}.welcome-text{color:var(--light-text);max-width:500px;margin-bottom:25px}ul{list-style-type:none;padding:0;margin:0}.friend-item{background-color:var(--card-bg);margin-bottom:10px;padding:12px 15px;border-radius:8px;cursor:pointer;transition:all .2s;display:flex;align-items:center;border:1px solid #e5e7eb}.friend-item:hover{transform:translateY(-2px);box-shadow:0 4px 6px -1px #0000000d;border-color:var(--secondary-color)}.friend-avatar{width:40px;height:40px;background-color:var(--secondary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:500;margin-right:12px;flex-shrink:0}.friend-info{flex-grow:1}.friend-name{font-weight:500}.friend-status{font-size:.8rem;color:var(--light-text)}.last-message{display:flex;justify-content:space-between;align-items:center;width:100%}.message-content{display:flex;align-items:center;flex:1;min-width:0}.message-status{color:var(--success-color);font-size:.7rem;margin-right:4px;font-weight:700}.message-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-time{font-size:.7rem;color:var(--light-text);margin-left:8px;flex-shrink:0}.request-item{background-color:var(--card-bg);margin-bottom:10px;padding:12px 15px;border-radius:8px;display:flex;align-items:center;border:1px solid #e5e7eb}.request-info{flex-grow:1}.request-actions{display:flex;gap:8px}.accept-btn{padding:6px 12px;background-color:var(--success-color);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:12px;transition:all .2s}.reject-btn{padding:6px 12px;background-color:var(--danger-color);color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:12px;transition:all .2s}.accept-btn:hover,.reject-btn:hover{opacity:.9}.empty-state{text-align:center;padding:20px;color:var(--light-text)}.empty-icon{font-size:2rem;margin-bottom:10px;opacity:.5}.fa-spin{animation:fa-spin 1s infinite linear}@keyframes fa-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.unread-badge{background-color:var(--danger-color);color:#fff;border-radius:50%;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:600;margin-left:auto}@media (max-width: 1024px){#mainContent{gap:15px;padding:15px}#leftPanel{width:35%}#rightPanel{width:65%}}@media (max-width: 768px){body{overflow-x:hidden}#mainContent{flex-direction:column;padding:10px;overflow-y:auto;height:auto;min-height:calc(100vh - 60px);gap:15px}#leftPanel,#rightPanel{width:100%}#leftPanel{margin-bottom:0;max-height:350px;min-height:250px}#searchSection{flex-direction:column;align-items:stretch;padding:15px;gap:15px}.search-container{margin-right:0;margin-bottom:0;max-width:none}#header{padding:10px 15px;flex-wrap:wrap;min-height:60px}#header h1{font-size:1.4rem}.welcome-icon{font-size:3rem}.welcome-title{font-size:1.4rem}.welcome-text{font-size:.9rem;padding:0 10px}.friend-item,.request-item{padding:12px;margin-bottom:8px}.friend-avatar{width:35px;height:35px;font-size:.9rem}.message-form{padding:10px}.message-form input{padding:8px 12px}.message-form button{width:35px;height:35px}}@media (max-width: 480px){#header{flex-direction:column;align-items:stretch;padding:10px;gap:10px}#header div{width:100%;display:flex;justify-content:space-between;align-items:center}#logoutBtn{padding:6px 12px;font-size:12px}#mainContent{padding:8px;gap:10px}#leftPanel{max-height:300px}#friendsSection{padding:15px}.friend-item,.request-item{padding:10px;margin-bottom:6px}.friend-avatar{width:32px;height:32px;font-size:.8rem}.friend-name{font-size:.9rem}.friend-status{font-size:.75rem}.welcome-container{padding:20px 15px}.welcome-icon{font-size:2.5rem}.welcome-title{font-size:1.2rem}.welcome-text{font-size:.85rem}#searchSection{padding:12px}#sendRequestBtn{padding:10px 16px;font-size:13px}}.chat-container{display:flex;flex-direction:column;height:500px;background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow)}.chat-header{background-color:var(--primary-color);color:#fff;padding:15px 20px;display:flex;justify-content:space-between;align-items:center;border-radius:var(--border-radius) var(--border-radius) 0 0}.close-chat-btn{background:none;border:none;color:#fff;font-size:1.2rem;cursor:pointer;padding:5px;border-radius:50%}.close-chat-btn:hover{background:#fff3}.chat-body{flex:1;display:flex;flex-direction:column;overflow:hidden}#chatBox{flex:1;overflow-y:auto;padding:15px;background:#f9fafb}.message-row{display:flex;margin-bottom:10px}.message-row.sent{justify-content:flex-end}.message-row.received{justify-content:flex-start}.message{padding:10px 15px;border-radius:15px;max-width:70%;word-wrap:break-word}.sent .message{background-color:var(--primary-color);color:#fff}.received .message{background-color:#e9ecef;color:var(--text-color)}.message-info{display:flex;justify-content:space-between;align-items:center;font-size:.7rem;margin-top:5px;opacity:.8}.message-form{display:flex;align-items:center;padding:15px;border-top:1px solid #e5e7eb;background:#fff;border-radius:0 0 var(--border-radius) var(--border-radius)}.message-form input{flex:1;padding:10px 15px;border:1px solid #e5e7eb;border-radius:20px;font-family:Poppins,sans-serif;outline:none;font-size:14px}.message-form input:focus{border-color:var(--primary-color)}.message-form button{margin-left:10px;background:var(--primary-color);color:#fff;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center}.message-form button:hover{background:var(--accent-color)}.message-form button:disabled{opacity:.5;cursor:not-allowed}.file-btn{margin-right:10px;background:var(--secondary-color);color:#fff;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center}.file-btn:hover{background:var(--primary-color)}.file-message{margin:5px 0}.shared-image{max-width:200px;max-height:200px;border-radius:8px;cursor:pointer;transition:transform .2s}.file-attachment{display:flex;align-items:center;padding:10px;background:#ffffff1a;border-radius:8px;margin:5px 0}.file-attachment i{margin-right:8px;font-size:1.2rem}.file-link{color:inherit;text-decoration:none;font-weight:500}.file-link:hover{text-decoration:underline}.message-actions{display:none;position:absolute;top:-10px;right:5px;background:#fff;border-radius:15px;padding:2px;box-shadow:0 2px 8px #0000001a}.message:hover .message-actions{display:flex}.edit-btn,.delete-btn{background:none;border:none;cursor:pointer;padding:4px;border-radius:50%;margin:0 2px;font-size:12px}.edit-btn:hover,.delete-btn:hover{background:#f0f0f0}.edit-message{display:flex;flex-direction:column;gap:8px}.edit-input{background:#ffffffe6;border:1px solid #ddd;border-radius:8px;padding:8px;font-size:14px;color:var(--text-color)}.edit-actions,.edit-form-actions{display:flex;gap:5px}.save-btn{background:var(--success-color);color:#fff;border:none;border-radius:50%;width:30px;height:30px;cursor:pointer;display:flex;align-items:center;justify-content:center}.cancel-btn{background:var(--danger-color);color:#fff;border:none;border-radius:50%;width:30px;height:30px;cursor:pointer;display:flex;align-items:center;justify-content:center}.deleted-message{font-style:italic;opacity:.6}.edited-indicator{font-size:.7rem;opacity:.7;font-style:italic}.typing-indicator{display:flex;align-items:center;padding:10px 15px;margin-bottom:10px}.typing-dots{display:flex;gap:3px;margin-right:8px}.typing-dots span{width:6px;height:6px;background:var(--light-text);border-radius:50%;animation:typing 1.4s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}.typing-text{font-size:.8rem;color:var(--light-text);font-style:italic}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-10px);opacity:1}}.message{position:relative}.lazy-image{transition:opacity .3s;opacity:.7}.lazy-image.loaded{opacity:1}.loading-more{text-align:center;padding:10px;color:var(--light-text);font-size:.9rem}.loading-more i{margin-right:5px}.message-row{contain:layout;will-change:transform}.shared-image{max-width:200px;max-height:200px;border-radius:8px;cursor:pointer;transition:transform .2s,opacity .3s;-o-object-fit:cover;object-fit:cover}.shared-image:hover{transform:scale(1.02)}#chatBox{scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.typing-indicator{contain:layout style}.message-form{contain:layout}@media (max-width: 768px){.chat-header{padding:12px 15px}.back-btn{margin-right:10px;font-size:1.1rem}.friend-name{font-size:1rem}.chat-container{padding:10px}#chatBox{padding:15px;margin-bottom:10px}.message{max-width:85%;padding:8px 12px}.message-info{font-size:.65rem}}@media (max-width: 480px){.chat-header{padding:10px}.friend-avatar{width:32px;height:32px}.friend-name{font-size:.9rem}.chat-container{padding:8px}#chatBox{padding:10px}.message{max-width:90%;padding:6px 10px;font-size:.9rem}.message-form{padding:8px}.message-form input{padding:6px 10px;font-size:14px}.message-form button{width:32px;height:32px;margin-left:6px}}.call-modal-overlay{position:fixed;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:10000}.call-modal{background:var(--card-bg);border-radius:var(--border-radius);width:90%;max-width:600px;height:80vh;display:flex;flex-direction:column;overflow:hidden}.call-header{background:var(--primary-color);color:#fff;padding:20px;text-align:center}.call-info h3{margin:0 0 5px;font-size:1.5rem}.call-status{margin:0;opacity:.9;font-size:.9rem}.call-video-container{flex:1;position:relative;background:#000;display:flex;align-items:center;justify-content:center}.remote-video{width:100%;height:100%;-o-object-fit:cover;object-fit:cover}.local-video{position:absolute;top:20px;right:20px;width:150px;height:100px;border-radius:8px;border:2px solid white;-o-object-fit:cover;object-fit:cover}.audio-call-display{display:flex;align-items:center;justify-content:center;height:100%}.friend-avatar-large{width:120px;height:120px;background:var(--secondary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:3rem;font-weight:700}.call-controls{padding:30px;display:flex;justify-content:center;gap:20px;background:var(--bg-color)}.control-btn{width:60px;height:60px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.2rem;transition:all .2s}.control-btn:not(.end-call){background:var(--light-text);color:#fff}.control-btn.muted,.control-btn.video-off{background:var(--danger-color)}.control-btn.end-call{background:var(--danger-color);color:#fff}.control-btn:hover{transform:scale(1.1)}.call-buttons{display:flex;gap:10px}.call-btn{width:40px;height:40px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;transition:all .2s}.call-btn.audio-call{background:var(--success-color)}.call-btn.video-call{background:var(--primary-color)}.call-btn:hover{transform:scale(1.1)}.friend-actions{display:flex;align-items:center;gap:8px}.action-btn{width:32px;height:32px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:#fff;transition:all .2s;opacity:0}.friend-item:hover .action-btn{opacity:1}.action-btn.audio-btn{background:var(--success-color)}.action-btn.video-btn{background:var(--primary-color)}.action-btn:hover{transform:scale(1.1)}@media (max-width: 768px){.call-modal{width:95%;height:90vh}.local-video{width:100px;height:70px;top:10px;right:10px}.friend-avatar-large{width:80px;height:80px;font-size:2rem}.control-btn{width:50px;height:50px}.action-btn{opacity:1}}.incoming-call-notification{position:fixed;top:20px;right:20px;background:var(--card-bg);border-radius:var(--border-radius);box-shadow:0 4px 12px #00000026;width:300px;padding:15px;z-index:9999;display:flex;flex-direction:column;gap:15px;animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.notification-content{display:flex;align-items:center;gap:15px}.caller-avatar{width:50px;height:50px;background:var(--secondary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;font-weight:700}.caller-info h3{margin:0 0 5px;font-size:1.1rem;color:var(--text-color)}.caller-info p{margin:0;font-size:.9rem;color:var(--light-text)}.notification-actions{display:flex;justify-content:space-between;gap:10px}.accept-call-btn,.reject-call-btn{flex:1;padding:10px;border:none;border-radius:20px;color:#fff;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:5px;transition:all .2s}.accept-call-btn{background:var(--success-color)}.reject-call-btn{background:var(--danger-color)}.accept-call-btn:hover,.reject-call-btn:hover{transform:scale(1.05)}