.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;

    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    padding: 24px;
    border-radius: 12px;
    position: relative;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);

    transform: scale(0);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: #aaa;
    transition: color 0.2s;
}

.close-btn:hover {
    color: #000;
}


/* Кнопка в режиме загрузки */
.btsn button.loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
    opacity: 0.85;
}

.btsn button.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 18px;
    margin: -9px 0 0 -9px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}