/* * アナログな質感の再現
 * AIが生成しにくい「ノイズ」と「不均一さ」をCSSで表現
 */

body {
    background-color: #f4f1ea;
    color: #2b2b2b;
    overflow-x: hidden;
}

/* 画面全体にざらついた質感をオーバーレイ */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
    opacity: 0.6;
    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='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.08'/%3E%3C/svg%3E");
}

/* 縦書き設定 */
.tategaki {
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0.15em;
}

/* ふわっと墨が滲むような出現アニメーション */
.fade-in-ink {
    opacity: 0;
    filter: blur(8px);
    transform: translateY(20px);
    transition: opacity 1.5s ease-out, filter 1.5s ease-out, transform 1.5s ease-out;
}

.fade-in-ink.visible {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
}

/* 画像の縁を少し滲ませる */
.ink-edge {
    mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%),
                linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
    mask-composite: intersect;
}

/* カスタムスクロールバー */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f4f1ea;
}
::-webkit-scrollbar-thumb {
    background: #8c705f;
    border-radius: 4px;
}

/* ゆらぎアニメーション */
@keyframes yuragi {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-5px) rotate(0.5deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}
.animate-yuragi {
    animation: yuragi 6s ease-in-out infinite;
}