:root{--bg-primary:#fff;--bg-secondary:#f7f7f8;--text-primary:#1a1a1a;--text-secondary:#6e6e80;--border-color:#e5e5e5;--accent-color:#10a37f;--accent-hover:#1a7f64;--user-msg-bg:#f3f4f6;--ai-msg-bg:#fff;--sidebar-width:260px;--profile-width:300px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--radius-md:.5rem;--radius-lg:.75rem}@media (prefers-color-scheme:dark){:root{--bg-primary:#343541;--bg-secondary:#202123;--text-primary:#ececf1;--text-secondary:#c5c5d2;--border-color:#4d4d4f;--user-msg-bg:#343541;--ai-msg-bg:#444654}}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,textarea{font-family:inherit}.app-container{height:100vh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);background-color:var(--bg-secondary);border-right:1px solid var(--border-color);flex-direction:column;padding:1rem;display:flex}.main-content{background-color:var(--bg-primary);flex-direction:column;flex:1;display:flex;position:relative}.profile-sidebar{width:var(--profile-width);background-color:var(--bg-secondary);border-left:1px solid var(--border-color);padding:1.5rem;overflow-y:auto}.chat-messages{flex:1;padding-bottom:8rem;overflow-y:auto}.message-wrapper{border-bottom:1px solid var(--border-color);padding:1.5rem}.message-wrapper.user{background-color:var(--user-msg-bg)}.message-wrapper.assistant{background-color:var(--ai-msg-bg)}.message-content{gap:1.5rem;max-width:48rem;margin:0 auto;display:flex}.avatar{color:#fff;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;font-weight:700;display:flex}.avatar.user{background-color:#5436da}.avatar.assistant{background-color:var(--accent-color)}.markdown-body{overflow-wrap:break-word;flex:1}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin-top:1.5rem;margin-bottom:.5rem}.markdown-body p{margin-bottom:1rem}.markdown-body ul,.markdown-body ol{margin-bottom:1rem;margin-left:1.5rem}.markdown-body pre{color:#fff;border-radius:var(--radius-md);background-color:#1e1e1e;margin-bottom:1rem;padding:1rem;overflow-x:auto}.input-area-container{background:linear-gradient(180deg, transparent, var(--bg-primary) 20%);padding:2rem;position:absolute;bottom:0;left:0;right:0}.input-box{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-lg);max-width:48rem;box-shadow:var(--shadow-md);align-items:flex-end;margin:0 auto;padding:.5rem;display:flex;position:relative}.input-box textarea{resize:none;max-height:200px;color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;padding:.75rem}.input-actions{gap:.5rem;padding:.5rem;display:flex}.icon-btn{color:var(--text-secondary);border-radius:var(--radius-md);justify-content:center;align-items:center;padding:.5rem;transition:all .2s;display:flex}.icon-btn:hover{background-color:var(--bg-secondary);color:var(--text-primary)}.send-btn{background-color:var(--accent-color);color:#fff}.send-btn:hover:not(:disabled){background-color:var(--accent-hover);color:#fff}.send-btn:disabled{opacity:.5;cursor:not-allowed}.profile-card{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-lg);margin-bottom:1rem;padding:1rem}.profile-card h3{text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:1rem;font-size:.875rem}.profile-item{justify-content:space-between;margin-bottom:.5rem;font-size:.875rem;display:flex}.profile-label{color:var(--text-secondary)}.profile-value{text-align:right;font-weight:500}.auth-container{background-color:var(--bg-secondary);justify-content:center;align-items:center;height:100vh;display:flex}.auth-box{background-color:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);width:100%;max-width:400px;padding:2.5rem}.auth-box h2{text-align:center;margin-bottom:1.5rem}.input-field{border:1px solid var(--border-color);border-radius:var(--radius-md);background-color:var(--bg-primary);width:100%;color:var(--text-primary);margin-bottom:1rem;padding:.75rem}.primary-btn{background-color:var(--accent-color);color:#fff;border-radius:var(--radius-md);width:100%;margin-top:.5rem;padding:.75rem;font-weight:600}.primary-btn:hover{background-color:var(--accent-hover)}.auth-switch{text-align:center;color:var(--text-secondary);margin-top:1rem;font-size:.875rem}.auth-switch span{color:var(--accent-color);cursor:pointer;font-weight:500}