@import url('https://fonts.googleapis.com/css2?family=Google+Sans:ital,opsz,wght,GRAD@0,17..18,400..700,-50..200;1,17..18,400..700,-50..200&display=swap');
:root {
    --bg: #0f0f0f;
    --fg: #fff;
    --card-1: #b2b2b2;
    --card-2: #ac0000;
    --card-3: #555;
}

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

body {
    font-family: Google Sans;
}
a {
    text-decoration: none;
    color: #555; }
/* }
a {
    text-decoration: none;
    color: #555;
}
header{
    width: 1140px;
    max-width: 90%;
    margin: auto;
    height: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 100;
}
header .logo {
    font-weight: bold;
}
header nav a {
    margin-left: 30px;
}

.item {
    margin-top: 50px;
    height: 800px;
    overflow: hidden;
    position: relative;
position: absolute;
width: 1140px;
max-width: 90%;
left: 62%;
}
.item::before{
    width: 550px;
    height: 400px;
    content: '';
    background-image: linear-gradient(
        45deg, #680000, #ac0000
    );
    position: absolute;
    z-index: -1;
    border-radius: 60% 10% 70% 50%;
    filter: blur(110px);
    top: 50%;
    left: 30%;
    transform: translate(-10%, -50%);
    transition: 1s;
} */


img {
    width: 100%;
    height: 100%;
    object-fit: fill;
}
h1 {
    font-size: 4rem;
    font-weight: 500;
    line-height: 1;
}

p{
    font-size: 2rem;
     font-weight: 500;
      line-height: 1;
}
section {
position: relative;
width: 100%;
height: 100svh;
padding: 2rem;
background: var(--bg);
color: var(--fg);
}
.intro,
.outro {
text-align: center;
align-content: center;
}

.sticky {
    display: flex;
    justify-content: center;
    align-items: center;
}

.sticky-header {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.sticky-header h1 {
    position: relative;
    text-align: center;
    will-change: transform, opacity;
    transform: translateY(40px);
    opacity: 0;
}
.card-container {
    position: relative;
    width: 75%;
    display: flex;
    perspective: 1000px;
    transform: translateY(40px);
    will-change: width;
}
.card {
    position: relative;
    flex: 1;
    aspect-ratio: 5 / 7;
    transform-style: preserve-3d;
    transform-origin: top;
}

#card-1 {
    border-radius: 20px 0 0 20px;
}

#card-3 {
    border-radius: 0 20px 20px 0;
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: inherit;
    overflow: hidden;
}

.card-back {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    transform: rotateY(180deg);
    padding: 2rem;
    border-radius: 3.59281% / 2.58621%;
}

.card-back span {
    position: absolute;
    top: 2rem;
    left: 2rem;
    opacity: 0.4;
    font-size: 2rem;
}

#card-1 .card-back {
    background: linear-gradient(165.825deg,
    rgb(199,199,199) 0%,
     rgb(131,131,131) 100%);
     color: var(--bg);
}

#card-2 .card-back {
    background: linear-gradient(177deg,
    rgb(219, 14, 14) -18%,
     rgb(180, 11, 11) 31%,
     rgb(72, 2, 2) -100%
     );
}
 #card-3 .card-back {
    background: linear-gradient(rgb(31, 31, 31) 0%, rgb(22, 22, 22) 100%);
 }

@media (max-width: 1000px) {
    h1 {
        font-size: 3rem;
    }

    .intro h1,
    .outro h1 {
        width: 100%;
    }

    .sticky {
        height: max-content;
        padding: 4rem 2rem;
        flex-direction: column;
    }

    .sticky-header {
        position: relative;
        top: 0;
        left: 0;
        transform: none;
        margin-bottom: 4rem;
    }

    .sticky-header h1 {
        opacity: 1;
    }

    .card-container {
        width: 100%;
        flex-direction: column;
        gap: 2rem;
    }

    .card {
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
        border-radius: 20px !important;
    }

    #card-1,
    #card-2,
    #card-3,
    .card-back {
        transform: none;
    }
}