: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}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}.app-wrapper{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px;background-color:#121212}.main-card{background:#1e1e1e;padding:40px;border-radius:24px;box-shadow:0 10px 30px #0000004d;width:90%;max-width:400px;display:flex;flex-direction:column;justify-content:center;border:1px solid #333}.auth-section{display:flex;flex-direction:column;gap:16px}.auth-section h2{margin:0 0 10px;color:#fff;text-align:center}.input-field{width:100%;padding:14px;font-size:16px;border-radius:8px;background-color:#2c2c2c;border:1px solid #444;color:#e0e0e0}.input-field::placeholder{color:#888}.btn-primary{width:100%;padding:14px;font-size:16px;border-radius:8px;background-color:#3d5afe;color:#fff;border:none;cursor:pointer}.btn-primary:hover{background-color:#536dfe}@media(max-width:350px){.main-card{padding:1.5rem}}.main-card:has(.chat-container){max-width:1200px;width:95%;height:85vh;padding:0;justify-content:flex-start}.chat-container{display:flex;flex-direction:column;height:100%;width:100%;background:#1e1e1e;border-radius:24px;overflow:hidden}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:20px 30px;border-bottom:1px solid #333}.chat-header h3{margin:0;font-size:1.4rem;color:#fff}.chat-window{flex:1;overflow-y:auto;padding:30px;display:flex;flex-direction:column;gap:16px;background-color:#121212}.message-bubble{max-width:70%;padding:14px 20px;font-size:1.05rem;line-height:1.5;border-radius:18px}.message-bubble.user{align-self:flex-end;background-color:#3d5afe;color:#fff;border-bottom-right-radius:4px}.message-bubble.bot{align-self:flex-start;background-color:#2c2c2c;color:#e0e0e0;border-bottom-left-radius:4px}.chat-input-area{display:flex;padding:25px 30px;gap:15px;border-top:1px solid #333;background:#1e1e1e}.chat-input-area input{flex:1;border:1px solid #444;background-color:#2c2c2c;color:#fff;border-radius:12px;padding:15px 20px;font-size:1rem;outline:none}.chat-input-area button{background-color:#3d5afe;color:#fff;border:none;border-radius:12px;padding:0 25px;height:52px;font-weight:700;cursor:pointer;transition:transform .1s}.chat-input-area button:active{transform:scale(.95)}.logout-btn{font-size:.9rem;font-weight:700;color:#ff5252;background:none;border:1px solid #ff5252;border-radius:8px;cursor:pointer;padding:6px 15px;transition:all .2s}.logout-btn:hover{background:#ff5252;color:#fff}.chat-layout{display:flex;width:100%;height:100%;overflow:hidden}.chat-sidebar{width:260px;background-color:#1a1a1a;border-right:1px solid #333;display:flex;flex-direction:column;padding:20px}.new-chat-btn{background-color:transparent;color:#fff;border:1px solid #444;padding:12px;border-radius:8px;cursor:pointer;font-weight:500;margin-bottom:20px;transition:background .2s}.new-chat-btn:hover{background-color:#2c2c2c}.history-list{flex:1;overflow-y:auto;margin-bottom:20px}.history-label{color:#888;font-size:12px;text-transform:uppercase;margin-bottom:15px;letter-spacing:1px}.history-item{padding:10px;border-radius:6px;margin-bottom:5px;background:#252525;display:flex;flex-direction:column}.history-action{color:#e0e0e0;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-date{color:#666;font-size:11px;margin-top:4px}.logout-btn-sidebar{background:none;border:none;color:#ff5252;text-align:left;cursor:pointer;font-size:14px;padding:10px 0}.chat-placeholder{display:flex;justify-content:center;align-items:center;height:100%;color:#444;font-size:1.2rem}.main-card:has(.chat-layout){max-width:1200px;width:95%;height:85vh;padding:0}.history-item{padding:12px;margin-bottom:8px;background:#252525;border:1px solid #333;border-radius:12px;display:flex;flex-direction:column;transition:all .2s ease;cursor:default}.history-item:hover{background:#2c2c2c;border-color:#444}.history-action{color:#fff;font-size:14px;font-weight:500;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-date{color:#888;font-size:11px}.chat-sidebar{width:260px;background-color:#1a1a1a;border-right:1px solid #333;display:flex;flex-direction:column;padding:20px;border-top-left-radius:24px;border-bottom-left-radius:24px}.download-excel-btn{margin-top:10px;display:flex;align-items:center;gap:8px;background-color:#2e7d32;color:#fff;border:none;padding:8px 14px;border-radius:6px;font-size:.9rem;cursor:pointer;transition:background .2s}.download-excel-btn:hover{background-color:#388e3c}.message-bubble.bot{display:flex;flex-direction:column}