body { background: #f8f9fa; }
.auth-card { max-width: 400px; margin: 80px auto; }

.chat-box { height: 60vh; overflow-y: auto; }
.chat-bubble {
    width: fit-content;
    max-width: 85%;
    padding: 0.5rem 0.75rem;
    border-radius: 0.75rem;
    margin-bottom: 0.5rem;
    white-space: pre-wrap;
    font-size: 0.925rem;
}
.chat-user { background: #0d6efd; color: #fff; margin-left: auto; }
.chat-assistant { background: #e9ecef; color: #212529; margin-right: auto; }
.chat-error { background: #f8d7da; color: #842029; }
.chat-thinking { opacity: 0.6; }

.btn-pulse { animation: pulse 1.5s infinite; }
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(25, 135, 84, 0.5); }
    70% { box-shadow: 0 0 0 8px rgba(25, 135, 84, 0); }
    100% { box-shadow: 0 0 0 0 rgba(25, 135, 84, 0); }
}