:root{--background-color: #f0f4f8;--chat-window-bg: #ffffff;--header-bg: #ffffff;--text-color: #212529;--subtle-text-color: #6c757d;--border-color: #dee2e6;--input-bg: #f8f9fa;--input-border: #ced4da;--user-message-bg: #007bff;--user-message-text: #ffffff;--agent-message-bg: #e9ecef;--agent-message-text: #212529;--button-bg: #6c757d;--button-text: #ffffff;--prompt-bg: #f8f9fa;--prompt-hover-bg: #e9ecef;--shadow-color: rgba(0, 0, 0, .05);--highlight-bg: #ffe066;--highlight-text: #212529;--focus-ring-color: rgba(0, 123, 255, .25)}[data-theme=dark]{--background-color: #121212;--chat-window-bg: #1e1e1e;--header-bg: #2a2a2a;--text-color: #e0e0e0;--subtle-text-color: #888888;--border-color: #333333;--input-bg: #2a2a2a;--input-border: #444444;--user-message-bg: #377dff;--user-message-text: #ffffff;--agent-message-bg: #333333;--agent-message-text: #e0e0e0;--button-bg: #444444;--button-text: #e0e0e0;--prompt-bg: #2a2a2a;--prompt-hover-bg: #333333;--shadow-color: rgba(0, 0, 0, .2);--highlight-bg: #ffd966;--focus-ring-color: rgba(55, 125, 255, .3)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--background-color);color:var(--text-color);transition:background-color .3s,color .3s}.app-container{width:100%;height:100vh;display:flex;flex-direction:column}.chat-window{display:flex;flex-direction:column;height:100%;width:100%;background:var(--chat-window-bg);overflow:hidden;transition:background-color .3s}.chat-header{padding:.75rem 1rem;background-color:var(--header-bg);border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;flex-shrink:0;position:relative}.chat-header h1{margin:0;font-size:1.25rem;font-weight:600}.header-controls{display:flex;align-items:center;gap:.75rem}.desktop-controls{display:none;align-items:center;gap:.75rem}.search-input{background-color:var(--input-bg);border:1px solid var(--border-color);color:var(--text-color);border-radius:20px;padding:.5rem 1rem;font-size:.9rem;width:180px;transition:width .3s ease-in-out,border-color .2s,box-shadow .2s}.search-input:focus-visible{outline:none;border-color:var(--user-message-bg);box-shadow:0 0 0 3px var(--focus-ring-color)}.theme-toggle-button,.header-button,.mobile-menu-button{border-radius:20px;cursor:pointer;transition:background-color .2s,transform .1s,box-shadow .2s;-webkit-tap-highlight-color:transparent}.theme-toggle-button:hover,.header-button:hover,.mobile-menu-button:hover{transform:translateY(-1px)}.theme-toggle-button:focus-visible,.header-button:focus-visible,.mobile-menu-button:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus-ring-color)}.header-button{background:var(--button-bg);color:var(--button-text);border:none;padding:.5rem 1rem;font-weight:500;white-space:nowrap}.theme-toggle-button{background-color:var(--prompt-bg);color:var(--text-color);border:1px solid var(--border-color);font-size:1.2rem;padding:.4rem;width:40px;height:40px;border-radius:50%;display:flex;justify-content:center;align-items:center}.mobile-menu-container{position:relative}.mobile-menu-button{background:none;border:none;color:var(--text-color);font-size:1.5rem;padding:0 .5rem;display:flex;align-items:center}.mobile-menu{position:absolute;top:calc(100% + 5px);right:0;background-color:var(--header-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 4px 12px var(--shadow-color);padding:.5rem;z-index:10;display:flex;flex-direction:column;gap:.5rem;width:200px}.mobile-menu button,.search-input-mobile{background-color:var(--prompt-bg);border:1px solid var(--border-color);color:var(--text-color);padding:.75rem;border-radius:6px;text-align:left;width:100%;box-sizing:border-box;font-size:.9rem;cursor:pointer}.mobile-menu button:hover{background-color:var(--prompt-hover-bg)}.search-input-mobile{font-size:.9rem}.message-list{flex-grow:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.75rem}.chat-message{display:flex;flex-direction:column;max-width:75%;animation:fadeInUp .4s ease-out}.message-content{display:flex;align-items:flex-end;gap:.5rem}.chat-message.user .message-content{flex-direction:row-reverse}.weather-icon{font-size:1.5rem;line-height:1}.message-bubble{padding:.75rem 1rem;border-radius:18px;word-wrap:break-word;line-height:1.5}.chat-message.user{align-self:flex-end;align-items:flex-end}.chat-message.user .message-bubble{background-color:var(--user-message-bg);color:var(--user-message-text);border-bottom-right-radius:4px}.chat-message.agent{align-self:flex-start;align-items:flex-start}.chat-message.agent .message-bubble{background-color:var(--agent-message-bg);color:var(--agent-message-text);border-bottom-left-radius:4px}.message-timestamp{font-size:.75rem;color:var(--subtle-text-color);margin-top:4px;padding:0 5px}mark{background-color:var(--highlight-bg);color:var(--highlight-text);padding:2px;border-radius:3px}.message-input{display:flex;padding:1rem;border-top:1px solid var(--border-color);background:var(--header-bg);flex-shrink:0;gap:.75rem}.message-input input{flex-grow:1;padding:.75rem 1rem;border:1px solid var(--input-border);border-radius:20px;font-size:1rem;outline:none;transition:border-color .2s,box-shadow .2s;background-color:var(--input-bg);color:var(--text-color)}.message-input input:focus-visible{outline:none;border-color:var(--user-message-bg);box-shadow:0 0 0 3px var(--focus-ring-color)}.message-input input:disabled{background-color:var(--agent-message-bg);cursor:not-allowed}.message-input button{padding:.5rem;width:44px;height:44px;border:none;background-color:var(--user-message-bg);color:#fff;border-radius:50%;display:flex;justify-content:center;align-items:center}.message-input button:disabled{background-color:#a0c7ff;cursor:not-allowed}.typing-indicator{display:flex;align-items:center;padding:.25rem .5rem}.typing-indicator span{height:8px;width:8px;background-color:var(--subtle-text-color);border-radius:50%;margin:0 2px;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}.welcome-screen{flex-grow:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2rem;text-align:center}.welcome-icon{font-size:3rem;margin-bottom:1rem;animation:fadeInUp .5s ease-out}.welcome-content h1{animation:fadeInUp .5s ease-out .1s;animation-fill-mode:both}.welcome-content p{animation:fadeInUp .5s ease-out .2s;animation-fill-mode:both}.prompt-suggestions{display:inline-grid;grid-template-columns:1fr 1fr;gap:.75rem;animation:fadeInUp .5s ease-out .3s;animation-fill-mode:both}.prompt-button{background-color:var(--prompt-bg);border:1px solid var(--border-color);color:var(--text-color);padding:.75rem;border-radius:8px;cursor:pointer;text-align:left;transition:background-color .2s,transform .1s;font-size:.9rem}.prompt-button:hover{background-color:var(--prompt-hover-bg);transform:translateY(-1px)}.prompt-button:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus-ring-color)}@media (min-width: 768px){body{display:flex;justify-content:center;align-items:center;padding:1rem;box-sizing:border-box}.app-container{max-width:800px;height:calc(100vh - 2rem);max-height:900px}.chat-window{border-radius:12px;box-shadow:0 4px 20px var(--shadow-color)}.desktop-controls{display:flex}.mobile-menu-container{display:none}.chat-header{padding:.75rem 1.5rem}}@media (max-width: 600px){.prompt-suggestions{grid-template-columns:1fr}}