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ease}.manual-address-input:focus{outline:none;border-color:#667eea}.continue-button{background:#667eea;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:10px;cursor:pointer;font-size:1rem;transition:all .3s ease}.continue-button:hover{background:var(--button-hover)}.continue-button:disabled{opacity:.5;cursor:not-allowed}.back-button{background:var(--button-primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:10px;cursor:pointer;font-size:1.2rem;margin-right:1rem;transition:all .3s ease}.back-button:hover{background:var(--button-hover)}@media (max-width: 768px){.app-header{flex-direction:column;gap:1rem;text-align:center}.header-right{width:100%;justify-content:center}.main-content{padding:1rem}.public-chat,.private-chat{height:calc(100vh - 280px)}.message{max-width:90%}.message-input-container{padding:1rem}.connect-card,.register-card{margin:1rem;padding:2rem}}@media (max-width: 480px){.tab-navigation{padding:0 1rem}.tab-button{padding:1rem .75rem;font-size:.9rem}.messages-container,.chat-header{padding:1rem}}