body {
    margin: 0;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background: #00000000; /* Фон страницы */
    color: #333; /* Текст */
    font-family: Arial, sans-serif;
}

.page-dark {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0); /* Затемнённая область */
    pointer-events: none;
    z-index: 1000;
    overflow: hidden;
}

/* Матрица: символы */
.matrix-rain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    overflow: hidden;
    pointer-events: none;
}

.symbol {
    position: absolute;
    font-size: 18px;
    font-family: monospace;
    color: rgba(255, 0, 0, 0.7);
    animation: fall linear infinite;
    text-shadow: 0 0 6px rgba(255, 0, 0, 0.7), 0 0 10px rgba(255, 0, 13, 0.7);
}

@keyframes fall {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    100% {
        transform: translateY(30vh);
        opacity: 0;
    }
}