.att-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.att-popup-overlay.active {
    display: flex;
}

.att-popup-content {
    background-color: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: popupFadeIn 0.3s ease;
}

.att-popup-header {
    padding: 24px 32px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background-color: #fff;
    z-index: 1;
}

.att-popup-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: #000;
    font-family: var(--font-primary);
    font-weight: bold;
}

.att-popup-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    transition: color 0.3s;
}

.att-popup-close:hover {
    color: #000;
}

.att-popup-body {
    padding: 32px;
}

.popup-section {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
}

.popup-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.popup-section h4 {
    font-family: var(--font-primary);
    font-weight: bold;
    font-size: 1.125rem;
    margin: 0 0 16px;
    color: #000;
}

.popup-section p {
    margin: 0 0 16px;
    line-height: 1.6;
    color: #333;
}

.popup-section p:last-child {
    margin-bottom: 0;
}

.popup-section ul {
    margin: 16px 0;
    padding-left: 24px;
}

.popup-section li {
    margin-bottom: 8px;
    line-height: 1.5;
    color: #333;
}

.popup-section li:last-child {
    margin-bottom: 0;
}

.popup-section .note {
    font-size: 0.875rem;
    color: #666;
    font-style: italic;
}

.popup-footer {
    margin-top: 32px;
    padding-top: 16px;
}

.popup-footer .copyright {
    font-size: 0.75rem;
    color: #666;
    margin: 0;
    line-height: 1.4;
}

@keyframes popupFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    .att-popup-content {
        width: 95%;
        margin: 16px;
        max-height: 85vh;
    }

    .att-popup-header {
        padding: 16px 20px;
    }

    .att-popup-header h3 {
        font-size: 1.25rem;
    }

    .att-popup-body {
        padding: 20px;
    }

    .popup-section {
        margin-bottom: 20px;
        padding-bottom: 20px;
    }

    .popup-section h4 {
        font-size: 1rem;
        margin-bottom: 12px;
    }
}