.full-screen-overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #e0e7ef;
display: flex;
justify-content: center;
align-items: center;
z-index: 9999;
padding: 50px; 
box-sizing: border-box;
}

.large-white-box {
background-color: #ffffff;
width: 100%;
max-width: 1000px; 
aspect-ratio: 16 / 9; 

display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
text-align: center;
box-sizing: border-box;
padding: 40px;
}

.announcement-text {
color: #4A6785;
font-weight: bold;
line-height: 2;
font-size: clamp(1rem, 4vw, 2rem); 
margin: 0;
}

@media (max-width: 768px) {
.full-screen-overlay {
padding: 20px;
}
.large-white-box {
aspect-ratio: auto;
padding: 60px 20px;
}
}