.tab-btn {
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: #9333ea;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.tab-content {
    transition: all 0.3s ease;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s;
}

.tab-content.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-card {
    background: #f3f4f6;
    border-radius: 12px;
    padding: 16px;
    margin-top: 20px;
}

.download-btn {
    display: inline-block;
    background: #10b981;
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    text-decoration: none;
    margin-top: 10px;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #9333ea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}