.welcome-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #000;
    transition: opacity 1s ease-in-out;
    position: relative;
}
.sound-waves {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}
.wave {
    width: 6px;
    height: 40px;
    background-color: #1fdf64;
    border-radius: 4px;
    animation: wave-animation 1.2s infinite ease-in-out;
}
.wave:nth-child(1) { animation-delay: 0s; }
.wave:nth-child(2) { animation-delay: 0.2s; }
.wave:nth-child(3) { animation-delay: 0.4s; }
.wave:nth-child(4) { animation-delay: 0.6s; }
.wave:nth-child(5) { animation-delay: 0.8s; }
@keyframes wave-animation {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(2); }
}
.logo {
    width: 200px;
    height: auto;
    margin-bottom: 20px;
}
.main-content {
    display: none;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}
.watermark {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
}