.envelope-wrapper {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    background-color: #f4f1ea;
    perspective: 1200px;
    z-index: 9999;
    transition: opacity 1s ease, visibility 1s ease;
}
.envelope-header {
    z-index: 1;
    padding-top: 5vh;
}
.envelope-header img {
    width: 110px;
    height: auto;
    margin-bottom: 15px;
}
.envelope-header h2 {
    margin: 0;
    color: var(--font-color);
    font-family: var(--font-principal);
    font-size: 32px;
    font-weight: 500;
    font-style: italic;
    text-transform: none;
}
.envelope-header h2 span {
    margin: 0 8px;
}
.envelope-decoration {
    position: absolute;
    bottom: 0;
    width: auto;
    height: auto;
    pointer-events: none;
    z-index: 1;
}

.envelope-decoration-left {
    left: 0;
}

.envelope-decoration-right {
    right: 0;
}

.envelope {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 500px;
    height: 333px;
    transform: translate(-50%, -50%);
    cursor: pointer;
    z-index: 5;
}
.envelope-flap {
    position: absolute;
    inset: 0;
    z-index: 3;
    transform-origin: top center;
    transform-style: preserve-3d;
    transition:
        transform 0.9s cubic-bezier(0.4, 0, 0.2, 1),
        z-index 0s linear 0.45s;
}
.envelope-flap img {
    width: 100%;
    height: 100%;
    display: block;
}
.envelope-body {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.25s ease-out;
}
.envelope.zoom .envelope-body {
    opacity: 0;
}
.envelope-body img {
    width: 100%;
    height: 100%;
    display: block;
}
.envelope-card {
    position: absolute;
    left: 50%;
    bottom: 5px;
    width: 95%;
    height: 98%;
    transform: translateX(-50%);
    z-index: 2;
    background: transparent;
    padding: 0;
    box-sizing: border-box;
    overflow: visible;
    transition:
        transform 1.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.sobre-content {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    opacity: 0;
    visibility: hidden;
    transform: translateY(0);
    overflow: hidden;
}
.sobre-content img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}
.envelope.open .envelope-flap {
    transform: rotateX(180deg);
    z-index: 1;
}
.envelope.open .envelope-body {
    z-index: 3;
}
.envelope.open .sobre-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition:
        transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
        opacity 0.25s ease;
}
.envelope-card.card-out .sobre-content {
    transform: translateY(-75px);
}
.envelope.zoom .envelope-card {
    transform:
        translate(-50%, -55px)
        scale(2.4);
}
.envelope.zoom .sobre-content {
    transform: translateY(-75px);
}
.envelope-instruction {
    position: absolute;
    top: calc(50% + 190px);
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    z-index: 20;
    text-align: center;
    pointer-events: none;
    transition:
        opacity 0.5s ease,
        visibility 0.5s ease;
}
.envelope-instruction h3 {
    margin: 0;
    padding: 0;
    color: #8c3e53;
    font-family: var(--font-principal);
    font-size: 22px;
    font-weight: 500;
    font-style: italic;
    text-transform: none;
}
.envelope.open + .envelope-instruction {
    opacity: 0;
    visibility: hidden;
}
.envelope-wrapper.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.main-content {
    opacity: 1;
    transition: opacity 1s ease-in;
}

@media (max-width: 600px) {
    .envelope-header {
        padding-top: 15vh;
    }
    .envelope-header img {
        width: 95px;
        margin-bottom: 8px;
    }
    .envelope-header h2 {
        font-size: 22px;
        line-height: 1.15;
        padding: 0 20px;
    }
    .envelope-header h2 span {
        margin: 0 4px;
    }
    .envelope-decoration {
        width: 38vw;
    }
    .envelope {
        width: 50vw;
        height: auto;
        aspect-ratio: 500 / 333;
    }
    .envelope-instruction {
        top: calc(50% + 31vw);
    }
    .envelope-instruction h3 {
        font-size: 18px;
    }
}
@media (max-width: 400px) {
    .envelope-decoration {
        width: 32vw;
    }
}