.bct-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 550px;
    width: 90%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 99999;
}

@media (max-width: 768px) {
    .bct-popup {
        padding: 24px;
        width: 95%;
    }
}

@media (max-width: 480px) {
    .bct-popup {
        padding: 16px;
        width: 98%;
    }
}

.bct-popup.show {
    opacity: 1;
    visibility: visible;
}

.bct-popup-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}

.bct-popup-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #007bff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
}

.bct-popup-icon::before {
    content: 'i';
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.bct-popup-title {
    font-size: 18px;
    font-weight: 500;
    color: #666;
}

@media (max-width: 480px) {
    .bct-popup-title {
        font-size: 16px;
    }
}

.bct-popup-content {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    color: #333;
    margin-bottom: 24px;
    text-align: left;
}

@media (max-width: 768px) {
    .bct-popup-content {
        font-size: 18px;
        margin-bottom: 20px;
    }
}

@media (max-width: 480px) {
    .bct-popup-content {
        font-size: 16px;
        margin-bottom: 16px;
    }
}

.bct-popup-footer {
    text-align: center;
    color: #888;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 480px) {
    .bct-popup-footer {
        font-size: 14px;
    }
}

.bct-countdown {
    font-weight: bold;
    color: #007bff;
}

.bct-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 99998;
}

.bct-overlay.show {
    opacity: 1;
    visibility: visible;
}