/* fatalism.php 専用オーバーレイ */

/* ノイズテクスチャ */
.fatalism-page-effects::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9998;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' seed='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* スキャンライン */
.fatalism-page-effects::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.015) 0px 1px,
        transparent 1px 3px
    );
}

/* 走査帯 */
.fatalism-sweep {
    position: fixed;
    left: 0;
    right: 0;
    height: 18vh;
    z-index: 9999;
    pointer-events: none;
    background: linear-gradient(
        180deg,
        transparent,
        rgba(255, 255, 255, 0.012) 45%,
        rgba(255, 255, 255, 0.025) 50%,
        transparent
    );
    animation: fatalism-sweep 10s linear infinite;
}

@keyframes fatalism-sweep {
    from { transform: translateY(-30vh); }
    to   { transform: translateY(130vh); }
}

@media (prefers-reduced-motion: reduce) {
    .fatalism-sweep {
        animation: none;
        display: none;
    }
}