:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}*{box-sizing:border-box;font-family:system-ui,-apple-system,BlinkMacSystemFont,sans-serif}html,body{margin:0;padding:0;height:100%;overflow:hidden;background:#f2f2f2}.chat-app{height:100vh;width:100vw;display:flex}.login-screen{margin:auto;background:#fff;padding:24px;width:90%;max-width:360px;border-radius:12px;display:flex;flex-direction:column;gap:12px;box-shadow:0 10px 30px #0000001a}.login-screen input{padding:12px;border-radius:8px;border:1px solid #ddd;font-size:16px}.login-screen button{padding:12px;border-radius:8px;border:none;background:#0a84ff;color:#fff;font-weight:600;cursor:pointer;font-size:16px}.chat-screen{height:100vh;width:100%;display:flex;flex-direction:column;background:#ece5dd}.chat-header{height:60px;flex-shrink:0;background:#075e54;color:#fff;padding:0 16px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.status{font-size:12px;opacity:.8}.logout-btn{background:none;border:none;color:#fff;font-size:18px;cursor:pointer}.chat-body{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px;overscroll-behavior:contain}.bubble{max-width:75%;padding:10px 14px;border-radius:16px;font-size:15px;line-height:1.4;word-wrap:break-word}.bubble.me{align-self:flex-end;background:#dcf8c6;border-bottom-right-radius:4px}.bubble.other{align-self:flex-start;background:#fff;border-bottom-left-radius:4px}.bubble img{max-width:100%;border-radius:12px}.chat-input{flex-shrink:0;position:sticky;bottom:0;z-index:10;background:#fff;display:flex;align-items:center;gap:8px;padding:8px;border-top:1px solid #ddd}.chat-input input{flex:1;height:40px;border-radius:20px;border:1px solid #ddd;padding:0 14px;outline:none;font-size:16px}.chat-input button{width:40px;height:40px;border-radius:50%;border:none;background:#0a84ff;color:#fff;font-size:18px;cursor:pointer}@media(max-width:600px){.bubble{font-size:16px}}