@import url("https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap");

:root {
    --dark: #000;
    --light: #f9f4eb;
    --light2: #f0ece5;
    --accent-1: #e5d9f6;
    --accent-2: #ffd2f3;
    --accent-3: #fcdca6;
}

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

html,
body {
    font-family: "DM Sans";
    overflow-x: hidden;
    width: 100%;
    margin: 0;
    padding: 0;
}

h1 {
    font-size: 1.5rem;
    font-weight: 500;
}

p {
    font-size: 1.1rem;
    font-weight: 500;
}

span {
    text-transform: uppercase;
    font-family: "DM Mono";
    font-size: 0.75rem;
    font-weight: 500;
}

nav {
    position: fixed;
    width: 100vw;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2;
}

.logo span,
.menu-btn span {
    font-size: 0.8rem;
    padding: 0.75rem;
    border-radius: 0.25rem;
}

.logo span {
    background-color: var(--dark);
    color: var(--light);
}

.menu-btn span {
    background-color: var(--light2);
    color: var(--dark);
}

section {
    position: relative;
    width: 100%;
    height: 100svh;
    padding: 2rem;
    overflow: hidden;
    box-sizing: border-box;
}

.hero {
    background-color: var(--light);
    color: var(--dark);
}

.about,
.outro {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--dark);
    color: var(--light);
}

.footer-beian {
    position: absolute;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.footer-beian a {
    color: var(--light);
    text-decoration: none;
    font-size: 0.8rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-beian a:hover {
    opacity: 1;
}

.hero-cards {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 35%;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.hero-cards .card {
    flex: 1;
    position: relative;
    aspect-ratio: 5/7;
    padding: 0.75rem;
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-title {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.hero-cards .card span {
    font-size: 0.75rem;
}

.hero-cards .card#hero-card-1 {
    background-color: var(--accent-1);
    transform-origin: top right;
    z-index: 2;
}

.hero-cards .card#hero-card-2 {
    background-color: var(--accent-2);
    z-index: 1;
}

.hero-cards .card#hero-card-3 {
    background-color: var(--accent-3);
    transform-origin: top left;
    z-index: 0;
}

.services {
    padding: 8rem 2rem;
}

.services-header {
    position: relative;
    width: 100%;
    text-align: center;
    transform: translateY(400%);
    will-change: transform;
}

.cards {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100svh;
    display: flex;
    justify-content: center;
    z-index: -1;
    background-color: var(--light);
}

.cards-container {
    position: relative;
    width: 75%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4rem;
}

.cards-container .card {
    flex: 1;
    position: relative;
    aspect-ratio: 5/7;
    perspective: 1000px;
}

.cards-container .card .card-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    animation: floating 2s infinite ease-in-out;
}

@keyframes floating {
    0% {
        transform: translate(-50%, -50%);
    }

    50% {
        transform: translate(-50%, -55%);
    }

    100% {
        transform: translate(-50%, -50%);
    }
}

#card-1 .card-wrapper {
    animation-delay: 0
}

#card-2 .card-wrapper {
    animation-delay: 0.25s;
}

#card-3.card-wrapper {
    animation-delay: 0.5s;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 1rem;
    backface-visibility: hidden;
    overflow: hidden;
}

.flip-card-front {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

#card-1 .flip-card-front {
    background-color: var(--accent-1);
}

#card-2 .flip-card-front {
    background-color: var(--accent-2);
}

#card-3 .flip-card-front {
    background-color: var(--accent-3);
}

.flip-card-back {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 2rem;
    background-color: #fff;
    transform: rotateY(180deg);
}

.card-copy {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.card-copy p {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1rem;
    background-color: var(--light2);
    border-radius: 0.25rem;
}

#card-1 {
    transform: translateX(100%) translateY(-100%) rotate(-5deg) scale(0.25);
    z-index: 2;
}

#card-2 {
    transform: translateX(0%) translateY(-100%) rotate(0deg) scale(0.25);
    z-index: 1;
}

#card-3 {
    transform: translateX(-100%) translateY(-100%) rotate(5deg) scale(0.25);
    z-index: 0;
}

.cards-container .card {
    opacity: 0;
}