*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app-container,.chat-interface{height:100vh;display:flex;flex-direction:column}.chat-interface{background-color:#f5f5f5}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background-color:#fff;border-bottom:1px solid #e0e0e0;box-shadow:0 2px 4px rgba(0,0,0,.1);position:relative;z-index:10}.header-title h1{font-size:1.5rem;font-weight:600;color:#333}.header-controls{justify-content:space-between}.header-controls,.left-controls{display:flex;align-items:center;gap:1rem}.language-selector{padding:.5rem 1rem;border:2px solid #ddd;border-radius:.5rem;background-color:#fff;font-size:.9rem;cursor:pointer;outline:none;transition:border-color .2s ease}.language-selector:hover{border-color:#007bff}.language-selector:focus{border-color:#007bff;box-shadow:0 0 0 3px rgba(0,123,255,.1)}.audio-controls{display:flex;gap:.5rem}.audio-control-btn{padding:.5rem;background:none;border:2px solid #ddd;border-radius:50%;cursor:pointer;font-size:1.2rem;width:3rem;height:3rem;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.audio-control-btn:hover{border-color:#007bff;background-color:#f8f9fa}.audio-control-btn.recording{border-color:#dc3545;background-color:#fff5f5}.audio-control-btn.disabled{opacity:.5}.audio-control-btn.new-chat-btn{border-color:#28a745}.audio-control-btn.new-chat-btn:hover{border-color:#218838;background-color:#f0fff4}.user-section{display:flex;align-items:center;gap:1rem}.welcome-text{font-size:.9rem;color:#666;font-weight:500}.logout-btn{background-color:#dc3545;color:#fff;border:none;padding:.5rem 1rem;border-radius:.5rem;font-size:.85rem;font-weight:500;cursor:pointer;transition:background-color .2s ease}.logout-btn:hover{background-color:#c82333}.messages-container{flex:1 1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:1rem}.message-item{display:flex;max-width:70%}.user-message{align-self:flex-end}.assistant-message{align-self:flex-start}.message-content{background-color:#fff;padding:.75rem 1rem;border-radius:1rem;box-shadow:0 1px 2px rgba(0,0,0,.1)}.user-message .message-content{background-color:#007bff;color:#fff}.message-text{margin-bottom:.25rem}.message-timestamp{font-size:.75rem;opacity:.7}.input-container{padding:1rem 2rem;background-color:#fff;border-top:1px solid #e0e0e0}.message-input-form{width:100%}.input-container .input-container{display:flex;gap:.5rem;width:100%}.message-input{flex:1 1;padding:.75rem 1rem;border:1px solid #ddd;border-radius:1.5rem;font-size:1rem;outline:none;transition:border-color .2s ease}.message-input:focus{border-color:#007bff}.send-button{padding:.75rem 1.5rem;background-color:#007bff;color:#fff;border:none;border-radius:1.5rem;font-size:1rem;cursor:pointer;transition:background-color .2s ease}.send-button:hover:not(:disabled){background-color:#0056b3}.send-button:disabled{background-color:#ccc;cursor:not-allowed}.loading-indicator{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;background-color:#f0f8ff;border-radius:1rem;box-shadow:0 1px 2px rgba(0,0,0,.1)}.loading-circle{width:1rem;height:1rem;background-color:#007bff;border-radius:50%;animation:throb 1.5s ease-in-out infinite}@keyframes throb{0%,to{transform:scale(1);opacity:.8}50%{transform:scale(1.2);opacity:1}}.loading-text{color:#555;font-size:.9rem}@media (max-width:768px){.chat-header{padding:1rem;flex-direction:column;gap:1rem}.header-controls{flex-wrap:wrap;justify-content:center}.user-section{flex-direction:column;gap:.5rem;text-align:center}.welcome-text{font-size:.8rem}}