html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--chl-bg-page);
    color: var(--chl-body-text);
}

/** フォーム・ジャーナル記事などで slate-50 系背景を共有（!important は使わない） */
body.chl-page-bg-muted {
    background-color: var(--chl-bg-muted);
}

.bg-noise {
    position: relative;
}

.bg-noise::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

.btn-elegant {
    position: relative;
    overflow: hidden;
    transition: color 0.4s ease;
}

.btn-elegant::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--chl-navy);
    transform: scaleY(0);
    transform-origin: bottom center;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: -1;
}

.btn-elegant:hover::after {
    transform: scaleY(1);
}

.btn-elegant:hover {
    color: #ffffff !important;
}

.img-zoom {
    transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.group:hover .img-zoom {
    transform: scale(1.05);
}

.grid-bg {
    background-image:
        linear-gradient(to right, var(--chl-grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--chl-grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
}

.spa-view {
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.spa-view.active {
    display: block;
    opacity: 1;
}

/* トップ「Why Gut Health?」腸内フローラ画像（透過）— 枠なし・ゆるい浮遊 */
@keyframes chl-microbiome-float {
    0%,
    100% {
        transform: translate3d(0, 0, 0);
    }
    25% {
        transform: translate3d(3px, -10px, 0);
    }
    50% {
        transform: translate3d(0, -16px, 0);
    }
    75% {
        transform: translate3d(-3px, -8px, 0);
    }
}

.chl-microbiome-float {
    animation: chl-microbiome-float 5.5s ease-in-out infinite;
    filter: drop-shadow(0 20px 36px rgba(0, 0, 0, 0.22));
    will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
    .chl-microbiome-float {
        animation: none;
        filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.18));
    }
}