.mobile-menu-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;z-index:999;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.mobile-menu{position:fixed;top:0;right:0;bottom:0;width:80%;max-width:280px;background-color:var(--bg);box-shadow:-2px 0 8px #0003;z-index:1000;transform:translate(100%);transition:transform .3s ease;display:flex;flex-direction:column;overflow-y:auto}.mobile-menu-open{transform:translate(0)}.mobile-menu-header{padding:1.5rem 1rem;background-color:var(--bg-secondary);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:flex-start}.mobile-menu-user-info{flex:1}.mobile-menu-username{font-weight:600;font-size:1.125rem;color:var(--text);margin-bottom:.25rem}.mobile-menu-code{font-size:.875rem;color:var(--text-light)}.mobile-menu-premium-badge{display:inline-block;margin-top:.5rem;padding:.25rem .75rem;background-color:var(--success-light);color:var(--success);border-radius:12px;font-size:.75rem;font-weight:600}.mobile-menu-close{background:none;border:none;color:var(--text);font-size:2rem;line-height:1;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:background-color .2s ease}.mobile-menu-close:hover{background-color:var(--bg)}.mobile-menu-close:active{transform:scale(.95)}.mobile-menu-nav{padding:1rem 0;display:flex;flex-direction:column}.mobile-menu-item{display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;background:none;border:none;color:var(--text);font-size:1rem;font-weight:500;text-align:left;cursor:pointer;transition:background-color .2s ease;border-left:3px solid transparent;min-height:44px}.mobile-menu-item:hover{background-color:var(--bg-secondary)}.mobile-menu-item:active{background-color:var(--border)}.mobile-menu-icon{font-size:1.25rem;display:flex;align-items:center;justify-content:center;min-width:24px}.mobile-menu-item-highlight{color:var(--primary);font-weight:600}.mobile-menu-item-highlight:hover{background-color:var(--primary-light);border-left-color:var(--primary)}.mobile-menu-item-premium{color:var(--success)}.mobile-menu-item-premium:hover{background-color:var(--success-light);border-left-color:var(--success)}.mobile-menu-item-logout{color:var(--danger);margin-top:auto;border-top:1px solid var(--border)}.mobile-menu-item-logout:hover{background-color:var(--danger-light);border-left-color:var(--danger)}@media (min-width: 769px){.mobile-menu,.mobile-menu-overlay{display:none}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--secondary: #64748b;--success: #10b981;--success-light: #d1fae5;--danger: #ef4444;--danger-light: #fee2e2;--warning: #f59e0b;--bg: #ffffff;--bg-secondary: #f8fafc;--text: #1e293b;--text-light: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-secondary);color:var(--text)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{padding:.75rem 1.5rem;border-radius:.5rem;border:none;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-dark)}.btn-secondary{background-color:var(--secondary);color:#fff}.btn-danger{background-color:var(--danger);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--bg);border-radius:.75rem;padding:1.5rem;box-shadow:var(--shadow);border:1px solid var(--border)}.input{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:.5rem;font-size:1rem;transition:border-color .2s}.input:focus{outline:none;border-color:var(--primary)}.input-group{margin-bottom:1rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text)}.alert{padding:1rem;border-radius:.5rem;margin-bottom:1rem}.alert-error{background-color:#fee;color:var(--danger);border:1px solid var(--danger)}.alert-success{background-color:#efe;color:var(--success);border:1px solid var(--success)}.loading{display:flex;align-items:center;justify-content:center;padding:2rem}.spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.navbar{background:var(--bg);border-bottom:1px solid var(--border);padding:1rem 0;box-shadow:var(--shadow)}.navbar-content{display:flex;justify-content:space-between;align-items:center}.chat-layout{display:grid;grid-template-columns:300px 1fr;gap:1rem;height:calc(100vh - 80px);padding:1rem}.chat-list{background:var(--bg);border-radius:.75rem;overflow-y:auto;border:1px solid var(--border)}.chat-window{background:var(--bg);border-radius:.75rem;display:flex;flex-direction:column;border:1px solid var(--border)}@media (max-width: 768px){.chat-layout{grid-template-columns:1fr}.chat-list{display:none}.chat-layout.show-list .chat-list{display:block}.chat-layout.show-list .chat-window{display:none}.navbar-desktop-links,.navbar-desktop-user{display:none!important}.navbar-hamburger{display:flex!important}}.navbar-hamburger{display:none;background:none;border:none;color:var(--text);font-size:1.75rem;cursor:pointer;padding:.5rem;line-height:1;transition:background-color .2s ease;border-radius:4px;min-width:44px;min-height:44px;align-items:center;justify-content:center}.navbar-hamburger:hover{background-color:var(--bg-secondary)}.navbar-hamburger:active{transform:scale(.95)}