@font-face{
	font-display:auto;
	font-family:Caveat;
	font-style:normal;
	font-weight:400;
	src:url(font/Caveat-Regular.ttf) format("truetype")
}
@font-face{
	font-display:auto;
	font-family:Caveat;
	font-style:normal;
	font-weight:700;
	src:url(font/Caveat-Bold.ttf) format("truetype")
}

@font-face{
	font-display:auto;
	font-family:Caveat;
	font-style:normal;
	font-weight:600;
	src:url(font/Caveat-SemiBold.ttf) format("truetype")
}
@font-face{
	font-display:auto;
	font-family:Caveat;
	font-style:normal;
	font-weight:500;
	src:url(font/Caveat-Medium.ttf) format("truetype")
}

*{box-sizing:border-box;margin:0;padding:0}

body {
    margin: 0;
}
.overflow-hidden {
    overflow: hidden;
}
.page-bg {
    background: url(../images/act-bg.png) center center no-repeat;
    background-size: cover;
}
.page-background{
	position: absolute;
	width: 100%;
	height: 100%;
	overflow: hidden;
	left: 0;
	top: 0;
}   
.page-background img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}
.page-background video {
	width: 100%;
	height: 100%;
	object-fit: cover;
}
.wrapper {
    height: 100vh;
}
.envelope.square {
    --aspect: 1;
}
.envelope.rectangle {
    --aspect: 0.666;
}
.envelope-animation {
    width: 100%;
    height: 100vh;
    perspective: 2500px;
    -webkit-perspective: 2500px;
    -webkit-transition: all 1.5s ease-in-out;
    transition: all 1.5s ease-in-out;
    -webkit-transform: translate3d(0,0,0);
    transform: translate3d(0,0,0);
    overflow: visible;
    z-index: 1;
    display: flex;
    align-items: center;
    transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: 0.5s;
}
.envelope-animation.finished {
    transform: scale(1.1);
}
.envelope {
    --env-height: clamp(200px, min(70vh, 80vw * var(--aspect)), 600px);
    --env-width: calc(var(--env-height) / var(--aspect));

    width: var(--env-width);
    height: var(--env-height);
    position: relative;
    margin: auto;
    transform-style: preserve-3d;
    transform-origin: 50% 0;
    /* transition: transform 1.2s ease-in-out; */
    transform:  translateY(calc(-1 * (var(--env-height) + 100px))) rotateY(0);
    position: relative;
    top: 100px;
    opacity: 0;
    transition: 
        transform 1.2s cubic-bezier(0.16, 1, 0.3, 1),
        opacity 0.8s ease-out;
}
.envelope.loaded {
    transform: translateY(0) rotateY(0);
    opacity: 1;
}
.envelope.finished {
    top: 0px;
    transition: all 0.5s ease 0s;
}
.envelope.flip {
    transform: translateY(0) rotateY(180deg);
}
.envelope_back {
    position: absolute;
    width: 100%;
    height: 100%;
    transform: rotateY(180deg);
    backface-visibility: hidden;
    overflow: visible;
    transition: all 1.2s ease-in-out;
    display: flex;
    justify-content: center;
}
.envelope_front {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background: #C4DFF0;
    top: 0;
    left: 0;
    z-index: 3;
    transform: translateZ(2px);
}
.envelope_back_outside {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    border-top: calc(var(--env-height) / 2) solid transparent;
    border-right: calc(var(--env-width) / 2) solid #C4DFF0;
    border-bottom: calc(var(--env-height) / 2) solid #C4DFF0;
    border-left: calc(var(--env-width) / 2) solid #a4d4f2;
    z-index: 3;
    transform: rotateY(180deg);
}
.stripe {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    border-right: calc(var(--env-width) / 2) solid transparent;
    border-bottom: calc(var(--env-height) / 2) solid transparent;
    border-left: calc(var(--env-width) / 2) solid transparent;
    transform-origin: top;
    transition: transform 0.25s linear;
}
.envelope_back_face {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: #3760C9;
    transition: all 1.2s ease-in-out;
}
/* Lid when closed */
.stripe.one {
  border-top: calc(var(--env-height) / 2) solid #658ced;
  transform: rotateX(0deg);
  z-index: 3;
  transition-delay: 0.75s;
}

/* Lid when opened */
.stripe.two {
  border-top: calc(var(--env-height) / 2) solid #3760C9;
  transform: rotateX(90deg);
  z-index: 1;
  transition-delay: 0.5s;
}

.envelope.flip .envelope_back {
    transform: rotateY(180deg) translateZ(1px);
}
.envelope.flip.movedDown .envelope_back {
    transform: rotateY(180deg) translate3d(0,100px,0px);
}
.envelope.flip.movedDown.finished .envelope_back{
    transform: rotateY(180deg) translate3d(0,0,0);
    transition: all 0.5s ease 0s;
}
.envelope.flip.movedDown .stripe.one {
    transform: rotateX(90deg);
    transition-delay: 1.25s;
}
.envelope.flip.movedDown .stripe.two {
    transform: rotateX(180deg);
    transition-delay: 1.5s;
}
.envelope.flip.movedDown .letter {
    transform: translateY(calc(-1 * (var(--env-height) / 2)));
    transition: transform 0.4s 0.6s ease, z-index 0.6s;
    z-index: 2;
    transition-delay: 2s;
}
.envelope.flip.movedDown.finished .letter {
    transform: translateY(0);
    transition: all 0.5s ease 0s;
}
.stripe-one-text {
    position: absolute;
    top: calc(var(--env-height) * 0.15);   /* Position on flap */
    left: 0;
    width: 100%;
    text-align: center;
    font-size: calc(var(--env-height) * 0.05); /* auto scaling */
    color: #fff;
    z-index: 3;
    pointer-events: none;
    transition: opacity 0.5s ease;
    opacity: 0;
}
.invite_text{
	display: flex;
	width: 100%;
	height: 100%;
	justify-content: center;
	align-items: center;
	font-size: calc(var(--env-height) * 0.08); /* auto scaling */
	font-family: Caveat;
	font-weight: 700;
}
.envelope.flip .stripe-one-text {
    opacity: 1;
}
.envelope.flip.movedDown .stripe-one-text {
    opacity: 0;
    transition-delay: 1.25s;
}
    
.letter {
  position: relative;
  background-color: #fff;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  height: 100%;
  top: 0;
  z-index: 2;
  box-shadow: 0 2px 26px rgba(0, 0, 0, 0.12);
}
.letter .card-page {
    width: 100%;
    height: 100%;
}
.letter .card-page img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.letter p {
  text-align: center;
  font-size: 30px;
  margin-top: 30px;
  color: #3B4049;
}
.envelope.dismissed .envelope_back .envelope_back_outside {
    transform: translate3d(0,1200px,0) rotateY(180deg);
    transition-delay: 0s;
    transition: all 1.2s ease-in-out;
}
.envelope.dismissed .envelope_back .stripe.one {
    transform: translate3d(0,1200px,0) rotateX(90deg);
    transition-delay: 0s !important;
    transition: all 1.2s ease-in-out;
}
.envelope.dismissed .envelope_back .stripe.two {
    transform: translate3d(0,1200px,0) rotateX(180deg);
    transition-delay: 0s !important;
    transition: all 1.2s ease-in-out;
}
.envelope.dismissed .envelope_back .envelope_back_face {
    transform: translate3d(0,1200px,0);
}


.flipbook-viewport-wrap {
    position: absolute;
    top: 0;
    left: 0;
	height: 100vh;
	width: 100%;
	display: flex;
	align-items: center;
	justify-content: center;

    visibility: hidden;
	opacity: 0;
    overflow:hidden;
    transition: opacity 0.1s ease, visibility 0.1s ease;
    transition-delay: 0.1s;
}

.flipbook-viewport {
    width:90vmin;
	height: 90vmin;
    position: relative;
    transition: 
        transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    transform: scale(0.8); 
}
.flipbook-viewport-wrap.loaded {
    opacity: 1;
    visibility: visible;
}
.flipbook-viewport-wrap.loaded .flipbook-viewport {
    transform: scale(1);
    opacity: 1;
}

.flipbook-viewport .container{
	width:100%;
	height:100%;
    position: absolute;
    left: 0;
    top: 0;
    padding: 0;
}

.flipbook-viewport .flipbook{
	width: 100%;
    height: 100%;
}

.flipbook-viewport .page{
	width:100%;
	height:100%;
	background-color:white;
	background-repeat:no-repeat;
	background-size:100% 100%;
    container-type: inline-size;
}
.flipbook .page{
	-webkit-box-shadow:0 0 20px rgba(0,0,0,0.2);
	box-shadow:0 0 20px rgba(0,0,0,0.2);
}

.flipbook-viewport .page img{
	-webkit-user-select: none;
	user-select: none;
	margin:0;
}

.flipbook-viewport .shadow{
	-webkit-transition: -webkit-box-shadow 0.5s;
	transition: box-shadow 0.5s;

	-webkit-box-shadow:0 0 20px #ccc;
	box-shadow:0 0 20px #ccc;
}


.flipbook .even .gradient{
	position:absolute;
	top:0;
	left:0;
	width:100%;
	height:100%;
    z-index: 99;

	/* background-image:-webkit-linear-gradient(left, rgba(0,0,0,0) 95%, rgba(0,0,0,0.2) 100%); */
	background-image: linear-gradient(to right,
        rgba(0,0,0,0) 90%,
        rgba(0,0,0,0.08) 96%,
        rgba(0,0,0,0.18) 100%
    )
}

.flipbook .odd .gradient{
	position:absolute;
	top:0;
	left:0;
	width:100%;
	height:100%;
    z-index: 99;

	/* background-image:-webkit-linear-gradient(right, rgba(0,0,0,0) 95%, rgba(0,0,0,0.15) 100%);
	background-image:linear-gradient(right, rgba(0,0,0,0) 95%, rgba(0,0,0,0.15) 100%); */
    background-image: linear-gradient(to left,
        rgba(0,0,0,0) 90%,
        rgba(0,0,0,0.08) 96%,
        rgba(0,0,0,0.18) 100%
    )
}

.animated{
	-webkit-transition:margin-left 0.5s;
	transition:margin-left 0.5s;
}

.pad-inside {
    padding: 50px;
    display: flex;
    align-items: center;
    height: 100%;
    max-width: 600px;
    margin: auto;
    position: relative;
}
.pad-inside .inner-wrap {
    overflow: auto;
    max-height: 100%;
    font-size: clamp(12px, 3cqw, 24px);
    z-index: 9;
}
.flipbook-next-button, .flipbook-previous-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
	height: 60px;
    background-color: rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: 0.5s ease;
    z-index: 9;
	display: flex;
	justify-content: center;
	align-items: center;
}
.flipbook-next-button img, .flipbook-previous-button img{
	width: 70%;
  	height: 70%;
	object-fit: cover;
}
.flipbook-previous-button {
    left: 0;
}
.flipbook-next-button {
    right: 0;
}
.flipbook .sendermail {
    position: absolute;
    bottom: 10%;
    left: 0;
    text-align: center;
    width: 100%;
    font-weight: bold;
}
#fullscreenBtn {
    position: absolute;
    bottom: 10px;
    right: 10px;
    z-index: 999;
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    padding: 8px 10px;
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
}

.page-img-bg {
    position: absolute;
    left: 0;
    top:0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.page-img-bg img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.page-img-bg:after{
    content: ' ';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color:rgba(255,255,255,0.7);
} 
@media (max-width: 768px) {
    .flipbook .gradient {
        display: none !important;
    }
    .flipbook-next-button, .flipbook-previous-button {
        width: 35px;
    }
}
@media (max-width: 640px) {
    .pad-inside {
        padding: 30px;
    }
}
.flipbook-viewport.rectangle {
    aspect-ratio: 1.5;
    width: min(90vw, 90vh * 3);
    height: auto;
    max-width: 90vw;
    max-height: 90vh;
}
@media (min-width: 769px) {
    .flipbook-viewport {
        max-width: 1400px;
        max-height: 90vh;
        width: calc(2 * 90vmin);
        height: auto;
        aspect-ratio: 2;
    }
    .flipbook-viewport.rectangle {
        aspect-ratio: 3;
    }
}
@media (max-height: 500px) {
    .pad-inside {
        padding: 30px;
    }
}