body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background-color: #0a0a0a;
    color: #f5f5f5;
    display: flex;
    height: 100vh;
    transition: background 0.3s, color 0.3s;
}

#sidebar {
    width: 280px;
    background: linear-gradient(180deg, #1a001a, #2b0033);
    display: flex;
    flex-direction: column;
    padding: 15px;
    border-right: 2px solid #a64ca6;
    overflow-y: auto;
}
#logo {
    font-size: 1.6em;
    text-align: center;
    margin-bottom: 20px;
    color: #ffb7c5;
    font-weight: bold;
}

.sidebar-section { margin-bottom: 15px; }
button {
    background: #6a0dad;
    color: white;
    border: none;
    border-radius: 12px;
    padding: 10px;
    margin: 5px 0;
    cursor: pointer;
    width: 100%;
    transition: 0.2s;
}
button:hover { background: #a64ca6; }

#chat { flex:1; display:flex; flex-direction:column; }
#messages { flex:1; overflow-y:auto; padding:15px; font-size:16px; }
.message { margin:8px 0; padding:10px; border-radius:12px; max-width:70%; word-wrap: break-word; }
.user { background:#6a0dad; align-self:flex-end; }
.assistant { background:#ffb7c5; color:#000; align-self:flex-start; }
#inputBar { display:flex; padding:10px; border-top:2px solid #a64ca6; background:#1a001a; }
#userInput { flex:1; padding:12px; border-radius:12px; border:none; outline:none; font-size:16px; }
#sendBtn { margin-left:10px; }

/* Chat History */
#chatHistory ul { list-style: none; padding:0; margin:0; }
#chatHistory li { padding: 8px; margin:5px 0; background:#2b0033; border-radius:8px; cursor:pointer; color:#ffb7c5; display:flex; justify-content:space-between; }
#chatHistory li:hover { background:#6a0dad; }
.deleteBtn { background:#ff4d6d; border:none; border-radius:8px; padding:2px 6px; cursor:pointer; margin-left:5px; color:#fff; font-size:0.8em; }

/* Modal */
.modal { display:none; position:fixed; z-index:100; left:0; top:0; width:100%; height:100%; overflow:auto; background-color:rgba(0,0,0,0.6);}
.modal-content { background-color:#1a001a; margin:10% auto; padding:20px; border:1px solid #888; width:80%; border-radius:12px; color:#fff;}
.close { color:#ffb7c5; float:right; font-size:28px; font-weight:bold; cursor:pointer; }