/* ====== ページ全体の背景（ホラー黒） ====== */
html, body {
    background-color: #000; /* 完全な黒 */
    background-image:
        radial-gradient(circle at 50% 20%, rgba(255,0,0,0.05), transparent 60%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.03), transparent 70%);
    color: #e8e8e8;
    min-height: 100vh;
}

/* ====== 本文コンテナ（黒ホラー調） ====== */
.container {
    background: #0b0b0b; /* 真っ黒すぎない黒 */
    color: #e8e8e8;      /* 読みやすい白寄りグレー */
    margin: 80px auto 24px;
    padding: 30px;
    width: min(90%, 700px);
    border-radius: 10px;

    /* 内側と外側のダブル影で不穏感 */
    box-shadow:
        0 0 25px rgba(0,0,0,0.6),
        inset 0 0 35px rgba(255,0,0,0.08),
        inset 0 0 15px rgba(255,255,255,0.05);

    /* 黒いノイズ混じりの汚れた紙っぽさ */
    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(255,0,0,0.03) 0px,
            rgba(255,0,0,0.03) 1px,
            transparent 1px,
            transparent 3px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(255,255,255,0.02) 0px,
            rgba(255,255,255,0.02) 2px,
            transparent 2px,
            transparent 4px
        );
}

/* ====== 本文の文字（小さめ・余白あり） ====== */
.content {
    margin-top: 26px;
    line-height: 1.75;
    font-size: 0.95rem;
    padding: 6px 2px;
    color: #e6e6e6;
}

/* ====== タイトル ====== */
.title {
    font-size: 1.7rem;
    font-weight: bold;
    margin-bottom: 14px;
    color: #ffdf8a; /* 暗い背景でも映える */
    position: relative;
}

/* 光って滲む蛍光ペン風ライン（ホラー寄り） */
.title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 14px;
    background: rgba(255,225,130,0.75);
    transform: skewX(-14deg);
    filter: blur(2px);
    opacity: 0.85;
    z-index: -1;
}

/* ====== ハート矢印 ====== */
.nav-arrows {
    display: flex;
    justify-content: space-between;
    margin: 30px 0 10px;
}

.arrow-btn img {
    width: 48px;
}