:root{--background-start:#1c1a3b;--background-end:#3f2b4b;--sidebar-bg:rgba(20,18,48,.8);--chat-panel-bg:rgba(28,26,59,.7);--primary-accent:#f38;--user-bubble-bg:#007bff;--assistant-bubble-bg:#3a3861;--text-primary:#f0f0f0;--text-secondary:#a0a0c0;--border-color:hsla(0,0%,100%,.1)}body{margin:0;font-family:Inter,-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:linear-gradient(135deg,var(--background-start),var(--background-end));color:var(--text-primary)}.container{display:flex;height:100vh;width:100vw;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.sidebar{width:260px;background-color:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column;padding:16px;box-sizing:border-box}.sidebar-header{font-size:1.5rem;font-weight:700;margin-bottom:24px}.model-list{list-style:none;padding:0;margin:0;flex-grow:1}.model-list li{padding:12px 16px;border-radius:8px;cursor:pointer;margin-bottom:8px;font-weight:500;transition:background-color .2s ease,color .2s ease;border:1px solid transparent}.model-list li:hover{background-color:hsla(0,0%,100%,.05)}.model-list li.active{background-color:var(--primary-accent);color:#fff;font-weight:600}.sidebar-footer button{width:100%;padding:12px;border-radius:8px;background-color:var(--assistant-bubble-bg);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;transition:background-color .2s ease}.sidebar-footer button:hover{background-color:#4b4972}.chat-panel{flex:1 1;display:flex;flex-direction:column;background-color:var(--chat-panel-bg)}.chat-header{padding:16px 24px;border-bottom:1px solid var(--border-color);font-size:1.2rem;font-weight:600;background-color:var(--sidebar-bg)}.chat-messages{flex:1 1;padding:24px;overflow-y:auto}.chat-messages .start-conversation{display:flex;justify-content:center;align-items:center;height:100%;color:var(--text-secondary);font-size:1.2rem}.chat-footer{padding:16px 24px;border-top:1px solid var(--border-color)}.input-area{display:flex;gap:12px;align-items:center;background-color:var(--sidebar-bg);padding:8px;border-radius:12px;border:1px solid var(--border-color)}.input-area input[type=text]{flex:1 1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:1rem;padding:8px}.input-area button{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease,color .2s ease}.input-area button:hover{background-color:var(--assistant-bubble-bg);color:var(--text-primary)}.input-area button.send-button{background-color:var(--primary-accent);color:#fff}.input-area button.send-button:disabled{background-color:#555;cursor:not-allowed}.bubble{padding:12px 16px;border-radius:18px;max-width:75%;margin-bottom:12px;white-space:pre-wrap;word-wrap:break-word}.bubble.user{background-color:var(--user-bubble-bg);color:#fff}.bubble.assistant{background-color:var(--assistant-bubble-bg);color:var(--text-primary)}