body {
    font-family: 'Microsoft JhengHei', 'PingFang TC', 'Noto Sans TC', sans-serif;
}
.textarea-container {
    position: relative;
}
textarea {
    resize: vertical;
    min-height: 200px;
}
.fade-in {
    animation: fadeIn 0.3s ease-in;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.success-feedback {
    animation: successPulse 0.5s ease-in-out;
}
@keyframes successPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}