html, body {
    width: 100%;
    height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
}

body {
    background: radial-gradient(ellipse at bottom, #7a002a, #1a0009);
}

.heart-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.heart-wrapper {
    position: absolute;
    bottom: -50px;
    animation: floatUp linear forwards;
}

.heart {
    position: relative;
    pointer-events: none;
    --heart-size: 20px;
    width: var(--heart-size);
    height: var(--heart-size);
    background-color: hotpink;
    animation: sway ease-in-out infinite alternate;
}

.heart::before,
.heart::after {
    content: '';
    position: absolute;
    width: var(--heart-size);
    height: var(--heart-size);
    border-radius: 50%;
    background-color: inherit;
}

.heart::before {
    top: -50%;
    left: 0;
}

.heart::after {
    top: 0;
    left: 50%;
}

.message-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 10;
}

.message-text {
    color: #fff;
    text-shadow: 0 0 10px #ff74a4, 0 0 20px #ff74a4;
    text-align: center;
    opacity: 0;
    font-size: clamp(2.5rem, 8vw, 6rem);
    transition: opacity 0.5s ease-in-out;
}

.message-text.fade-in {
    animation: fadeInMessage 1.5s ease-out forwards;
}

.message-text.fade-out {
    animation: fadeOutMessage 1.5s ease-in forwards;
}

@keyframes floatUp {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-110vh);
        opacity: 0;
    }
}

@keyframes sway {
    from {
        transform: translateX(-25px) rotate(-45deg);
    }
    to {
        transform: translateX(25px) rotate(-45deg);
    }
}

@keyframes fadeInMessage {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOutMessage {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}