body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: white;
}

.chat-container {
    width: 100%;
    max-width: 900px;
    margin: auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.chat-header {
    padding: 20px;
    border-bottom: 1px solid #334155;
    background: #111827;
}

.chat-header h1 {
    margin: 0;
}

.chat-header p {
    margin-top: 5px;
    color: #94a3b8;
}

.chat-box {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.user-message {
    align-self: flex-end;
    background: #2563eb;
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 75%;
}

.bot-message {
    align-self: flex-start;
    background: #1e293b;
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 75%;
    line-height: 1.6;
}

.chat-input-container {
    display: flex;
    padding: 20px;
    border-top: 1px solid #334155;
    background: #111827;
}

.chat-input-container input {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 10px;
    outline: none;
    font-size: 16px;
}

.chat-input-container button {
    margin-left: 10px;
    padding: 14px 24px;
    border: none;
    background: #2563eb;
    color: white;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
}

.chat-input-container button:hover {
    background: #1d4ed8;
}