body{margin:0;font-family:Arial,sans-serif;background:var(--bg-color);color:var(--text-color);transition:background .3s,color .3s}:root{--bg-color: #ffffff;--text-color: #000000;--sidebar-bg: #f3f3f3;--accent-color: #007bff;--bot-msg-bg: #e5e5e5;--input-bg: #ffffff;--input-placeholder: #666}.dark{--bg-color: #121212;--text-color: #ffffff;--sidebar-bg: #1e1e1e;--bot-msg-bg: #333;--input-bg: #1e1e1e;--input-placeholder: #aaa}body.dark,.dark *{color:var(--text-color)!important}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:var(--accent-color);border-radius:3px}::-webkit-scrollbar-track{background:transparent}.app-container{display:flex;height:100vh;overflow:hidden}.sidebar{width:250px;background:var(--sidebar-bg);display:flex;flex-direction:column;justify-content:space-between;padding:12px;transition:transform .3s ease,background .3s,box-shadow .3s;box-shadow:2px 0 8px #0000001a;z-index:1001;position:relative}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:6px 4px;margin-bottom:10px}.new-chat{background:var(--accent-color);color:#fff;border:none;padding:8px 12px;border-radius:10px;cursor:pointer;font-size:.9rem;transition:background .2s,transform .2s}.new-chat:hover{background:#0056b3;transform:scale(1.05)}.chat-list{flex:1;overflow-y:auto;margin-top:10px}.chat-item,.sidebar a{text-decoration:none;color:inherit;display:block;padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .25s ease,transform .2s,color .2s}.chat-item:hover,.sidebar a:hover{background:#007bff1f;transform:scale(.95)}.chat-item.active{background:var(--accent-color);color:#fff}.sidebar-footer{border-top:none!important;padding:10px;display:flex;flex-direction:column;align-items:center}.sidebar-footer button{width:100%;background:none;border:1px solid #ccc;border-radius:8px;padding:8px;cursor:pointer;transition:background .2s,transform .2s}.sidebar-footer button:hover{background:#00000012;transform:scale(1.02)}.made-by{text-align:center;margin-top:8px;font-size:.85rem;opacity:.7}.chat-area{flex:1;display:flex;flex-direction:column;background:var(--bg-color)}.chat-header{display:flex;align-items:center;background:var(--sidebar-bg);padding:12px;border-bottom:1px solid #ccc}.hamburger{background:none;border:none;font-size:1.5rem;margin-right:10px;cursor:pointer;display:none}.messages{flex:1;overflow-y:auto;padding:20px;scroll-behavior:smooth}.message{margin:8px 0;padding:12px 14px;border-radius:12px;max-width:80%;word-break:break-word;opacity:0;animation:fadeInUp .3s forwards}.message.user{background:var(--accent-color);color:#fff;align-self:flex-end}.message.bot{background:var(--bot-msg-bg);align-self:flex-start}.input-area{display:flex;padding:10px;border-top:1px solid #ccc;background:var(--sidebar-bg);position:sticky;bottom:0;z-index:10}.input-area input{flex:1;padding:10px;border:1px solid #ccc;border-radius:12px;outline:none;margin-right:8px;background:var(--input-bg);color:var(--text-color);transition:border .2s,background .3s,color .3s}.input-area input::placeholder{color:var(--input-placeholder)}.input-area input:focus{border-color:var(--accent-color)}.input-area button{background:var(--accent-color);color:#fff;border:none;padding:10px 14px;border-radius:12px;cursor:pointer;transition:background .2s,transform .2s}.input-area button:hover{background:#0056b3;transform:scale(1.05)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.sidebar{position:fixed;top:0;left:0;height:100%;width:80%;max-width:300px;transform:translate(-100%);z-index:1001}.sidebar.open{transform:translate(0)}.sidebar-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;z-index:1000;animation:fadeIn .3s}.hamburger{display:block}.chat-list{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}.sidebar-footer{margin-top:auto;padding-bottom:20px}.made-by{margin-top:12px;font-size:.8rem}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}