body {
    font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
}

/* Chat Messages */
.message {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: 18px;
    margin-bottom: 12px;
}

.user-message {
    background: #a855f7;
    color: white;
    margin-left: auto;
    border-bottom-right-radius: 4px;
}

.assistant-message {
    background: #f1f5f9;
    color: #334155;
    margin-right: auto;
    border-bottom-left-radius: 4px;
}

/* Sidebar */
.overlay-hidden {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay-visible {
    display: block;
    opacity: 1;
}

.sidebar-mobile-hidden {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.sidebar-mobile-visible {
    transform: translateX(0);
}

@media (min-width: 768px) {
    .sidebar-mobile-hidden {
        transform: translateX(0);
    }
}

/* Responsive adjustments */
@media (max-width: 767px) {
    .message {
        max-width: 90%;
    }
}