@keyframes fall {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0;
    }
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) rotate(360deg);
        opacity: 0;
    }
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #f8f9fa; /* Açık arka plan */
    height: 100vh;
    overflow: hidden;
    position: relative;
}

.background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.balloon {
    position: absolute;
    bottom: -10%;
    width: 50px;
    height: 70px;
    background: radial-gradient(circle, #ffcccc, #ff99cc);
    border-radius: 50%;
    animation: float 10s linear infinite;
    opacity: 0.8;
}

.balloon:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
}

.balloon:nth-child(2) {
    left: 30%;
    animation-delay: 2s;
}

.balloon:nth-child(3) {
    left: 50%;
    animation-delay: 4s;
}

.balloon:nth-child(4) {
    left: 70%;
    animation-delay: 6s;
}

.balloon:nth-child(5) {
    left: 90%;
    animation-delay: 8s;
}

.icon {
    position: absolute;
    font-size: 2.5rem;
    animation: float 8s linear infinite;
    opacity: 0.8;
}

.icon:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
}

.icon:nth-child(2) {
    left: 30%;
    animation-delay: 2s;
}

.icon:nth-child(3) {
    left: 50%;
    animation-delay: 4s;
}

.icon:nth-child(4) {
    left: 70%;
    animation-delay: 6s;
}

.icon:nth-child(5) {
    left: 90%;
    animation-delay: 8s;
}

.falling-letters {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.falling-letters span {
    position: absolute;
    font-size: 1.5rem;
    color: #00ff00; /* Yeşil renk */
    animation: fall 5s linear infinite;
    left: calc(var(--col) * 5vw); /* Sütun boşluğu */
    animation-delay: calc(var(--row) * 0.5s); /* Satır gecikmesi */
}

.falling-letters span:nth-child(1) { --col: 0; --row: 0; }
.falling-letters span:nth-child(2) { --col: 1; --row: 1; }
.falling-letters span:nth-child(3) { --col: 2; --row: 2; }
.falling-letters span:nth-child(4) { --col: 3; --row: 3; }
.falling-letters span:nth-child(5) { --col: 4; --row: 4; }
.falling-letters span:nth-child(6) { --col: 5; --row: 5; }
.falling-letters span:nth-child(7) { --col: 6; --row: 6; }
.falling-letters span:nth-child(8) { --col: 7; --row: 7; }
.falling-letters span:nth-child(9) { --col: 8; --row: 8; }
.falling-letters span:nth-child(10) { --col: 9; --row: 9; }
/* Daha fazla harf için benzer şekilde devam edecek... */

.container {
    position: relative;
    z-index: 1;
    background-color: rgba(255, 192, 203, 0.8); /* Pembe, hafif şeffaf kutu */
    padding: 20px;
    border-radius: 10px;
    max-width: 400px;
    margin: auto;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2rem;
    color: #ffffff;
    margin: 0;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

    .balloon {
        width: 40px;
        height: 60px;
    }

    .icon {
        font-size: 2rem;
    }
}