* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    height: 100vh;
    overflow: hidden;
    background: #0f0f1a;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

.bg-animation {
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, #ff00cc, #3333ff, #00ffee);
    animation: moveBg 10s linear infinite;
    filter: blur(120px);
    opacity: 0.3;
}

@keyframes moveBg {
    0% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(-25%, -25%);
    }

    100% {
        transform: translate(0, 0);
    }
}

.container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

input {
    padding: 10px 15px;
    border: none;
    border-radius: 10px;
    margin: 15px 0;
    outline: none;
    font-size: 1rem;
}

.letters {
    margin: 20px 0;
}

.letters span {
    display: inline-block;
    font-size: 4rem;
    margin: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-shadow: 0 0 10px cyan;
}

.letters span:hover {
    transform: scale(1.3);
    text-shadow: 0 0 20px #00ffee, 0 0 40px #00ffee;
}

.letters span.active {
    animation: explode 0.7s ease;
}

@keyframes explode {
    0% {
        transform: scale(1);
    }

    30% {
        transform: scale(1.6) rotate(20deg);
        color: #ff00cc;
    }

    60% {
        transform: translateY(-100px) rotate(-15deg);
    }

    100% {
        transform: translateY(0);
    }
}

.wave {
    animation: waveAnim 1s infinite;
}

@keyframes waveAnim {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-40px);
    }
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    background: #00ffee;
    color: black;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}

button:hover {
    background: #ff00cc;
    color: white;
}