body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Gaegu", sans-serif;
    background-image: url("heart-bg.jpg");
}

#envelope-container {
    text-align: center;
    cursor: pointer;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

#envelope{
    width: 200px;
    animation: pulse 1.5s infinite;
    cursor: pointer;
}

#letter-container{
    display: none;
    position: fixed;
    inset: 0;
    justify-content: center;
    align-items: center;
}

.letter-window{
    width: 90vw;
    max-width: 800px;
    aspect-ratio: 3/2;
    padding: 20px 20px 0 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-image: url("window.png");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    border-radius: 12px;
    gap: 1px;
    padding-top: 180px;
    transform: scale(1.2);
    opacity: 0;
    transition: transform 0.6s ease opacity 0.6s ease;
}

.letter-window.open {
    transform: scale(1);
    opacity: 1;
}

h1 {
    font-size: 30px;
    margin: 0;
}

p{
    font-size: 40px;
}



.hornet {
    width: 180px;
    height: auto;
    display: block;
}

.hornet.pop {
    transform: scale(1.2);
    transition: transform 0.3s ease;
}

.letter-window.final .hornet{
    width: 180px;
}

.buttons{
    display: flex;
    justify-content: center;
    gap: 30px;
    position: relative;
}

.no-wrapper{
    position: relative;
}

.btn {
    width: 120px;
    cursor: pointer;
    user-select: none;
}

.yes-btn, .no-btn {
    width: 120px;
    height: auto;
    display: inline-block;
}

.yes-btn{
    position: relative;
    z-index: 2;
    transform-origin: center center;
    transition: transform 0.3s ease;
}

.no-btn {
    z-index: 1;
    position: relative;
    transition: transform 0.15s ease;
    cursor: default;
}

.final-text {
    font-size: 22px;
    line-height: 1.4;
    text-align: center;
    display: inline-block;
    padding: 10px 20px;
    background-color: rgba(255, 240, 240, 0.5);
    border-radius: 10px;
}