: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}}:root{--bg-primary: #121212;--bg-secondary: #1e1e24;--bg-tertiary: #2d2d3a;--accent-color: #3b82f6;--accent-hover: #2563eb;--text-primary: #ffffff;--text-secondary: #a0a0a0;--border-color: #2d2d3a;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -1px rgba(0, 0, 0, .1);--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;width:100%;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);font-size:15px;-webkit-font-smoothing:antialiased;overflow:hidden}input,button{font-family:inherit;font-size:1.05rem;border:none;outline:none;border-radius:var(--radius)}input{background-color:var(--bg-tertiary);color:var(--text-primary);padding:12px 16px;border:1px solid transparent;transition:border-color .2s}input:focus{border-color:var(--accent-color)}button{cursor:pointer;background-color:var(--accent-color);color:#fff;padding:12px 20px;font-weight:600;transition:background-color .2s}button:hover{background-color:var(--accent-hover)}.auth-container{display:flex;justify-content:center;align-items:center;height:100vh;width:100vw;background-color:var(--bg-primary)}.auth-card{background-color:var(--bg-secondary);padding:40px;border-radius:16px;box-shadow:var(--shadow);width:100%;max-width:450px;text-align:center;border:1px solid var(--border-color)}.auth-card h2{margin-bottom:25px;font-size:2rem;color:var(--accent-color)}.auth-form{display:flex;flex-direction:column;gap:15px}.toggle-text{margin-top:20px;color:var(--text-secondary)}.toggle-text span{color:var(--accent-color);cursor:pointer;font-weight:600}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.sidebar{width:300px;background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0;height:100%}.sidebar-header{padding:20px;background-color:#0003;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color)}.logout-button{padding:8px 15px;font-size:.85rem;background-color:var(--bg-tertiary);color:var(--text-secondary);border-radius:8px;cursor:pointer;transition:all .2s}.logout-button:hover{background-color:#cf3a3a;color:#fff}.list-section{padding:15px;overflow-y:auto;flex:1}.list-section h3{font-size:.9rem;text-transform:uppercase;color:var(--text-secondary);margin-bottom:10px}.list-section ul{list-style:none}.list-section li{padding:12px 15px;margin-bottom:5px;background-color:var(--bg-tertiary);border-radius:8px;cursor:pointer;display:flex;align-items:center}.list-section li:hover,.list-section li.active{background-color:var(--accent-color);color:#fff}.chat-area{flex:1;height:100%;background-color:var(--bg-primary);display:flex;flex-direction:column}.chat-window{display:flex;flex-direction:column;height:100%;width:100%}.chat-header{padding:20px;background-color:var(--bg-secondary);border-bottom:1px solid var(--border-color);font-size:1.2rem;font-weight:600;flex-shrink:0}.messages-container{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:10px}.chat-window-placeholder{display:flex;justify-content:center;align-items:center;height:100%;color:var(--text-secondary);font-size:1.2em}.message-bubble{max-width:70%;padding:12px 18px;border-radius:18px;word-wrap:break-word;line-height:1.4;font-size:1rem}.my-message{align-self:flex-end;background-color:var(--accent-color);color:#fff;border-bottom-right-radius:4px}.other-message{align-self:flex-start;background-color:var(--bg-tertiary);color:var(--text-primary);border-bottom-left-radius:4px}.message-sender{font-size:.75rem;color:#ffffffb3;margin-bottom:4px;display:block}.message-input-area{padding:20px;background-color:var(--bg-secondary);border-top:1px solid var(--border-color);display:flex;gap:10px;flex-shrink:0}.message-input-area input{flex:1;border-radius:24px}.message-input-area button{padding:10px 25px;border-radius:24px}.add-btn{width:45px!important;height:45px;padding:0!important;border-radius:50%!important;display:flex;align-items:center;justify-content:center;font-size:24px;background-color:var(--bg-tertiary);color:var(--accent-color)}.add-btn:hover{background-color:var(--accent-color);color:#fff}