a[id="NF"] {
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
}

/* Класс, который добавляется при нажатии */
a[id="NF"].clicked {
    animation: nfRedden 0.4s ease forwards;
}

/* Анимация покраснения */
@keyframes nfRedden {
    0% {
        color: inherit;
        font-weight: normal;
        transform: scale(1);
    }
    50% {
        color: #ff6b6b;
        transform: scale(1.05);
    }
    100% {
        color: #e74c3c;
        font-weight: normal;
        transform: scale(1);
        text-decoration: line-through;
        opacity: 0.8;
    }
}

/* Модальное окно */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    max-width: 500px;
    width: 90%;
    animation: modalPopup 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalPopup {
    0% {
        opacity: 0;
        transform: scale(0.5) translateY(-50px);
    }
    70% {
        transform: scale(1.05) translateY(0);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-icon {
    font-size: 60px;
    color: #e74c3c;
    margin-bottom: 20px;
    animation: iconShake 0.5s ease;
}

@keyframes iconShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.modal-title {
    color: #e74c3c;
    font-size: 28px;
    margin-bottom: 15px;
    font-weight: bold;
}

.modal-message {
    color: #555;
    font-size: 18px;
    margin-bottom: 25px;
    line-height: 1.5;
}

.modal-button {
    background: #00a4b2;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 5px 15px #00a3b25c;
}

.modal-button:hover {
    background: #01909d;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px #00a3b25c;
}

.modal-button:active {
    transform: translateY(0);
}

.example-links {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-top: 30px;
}

.example-links h3 {
    color: #333;
    margin-bottom: 15px;
}

.code-block {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 15px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    margin: 15px 0;
    overflow-x: auto;
}

.test-area {
    margin-top: 30px;
    padding: 20px;
    border: 2px dashed #ddd;
    border-radius: 10px;
    text-align: center;
}