/* --- 1. 基本設定と変数 --- */
:root {
    --paper: #f9f6f2;
    --ink: #2c2c2c;
    --accent: #8e7d6f;
}

body {
    margin: 0; padding: 0;
    font-family: 'Shippori Mincho', serif;
    background-color: var(--paper);
    color: var(--ink);
    line-height: 2;
    overflow-x: hidden;
}

/* --- 2. イントロ演出（タイピング層） --- */
#intro-layer {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 2s ease;
}

#intro-text {
    color: #fff;
    font-size: 1.1rem;
    letter-spacing: 0.3em;
    padding: 20px;
    text-align: center;
}

/* --- 3. メインサイトのデザイン（最初は透明） --- */
.site-wrapper {
    opacity: 0;
    transition: opacity 3s ease;
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 20px;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.brand {
    font-size: 12px;
    letter-spacing: 0.3em;
    border-bottom: 1px solid var(--ink);
    padding-bottom: 5px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
}

.main-nav a {
    text-decoration: none;
    color: var(--ink);
    font-size: 13px;
    transition: color 0.3s;
}

.main-nav a:hover {
    color: var(--accent);
}

.book-page {
    display: flex;
    gap: 5%;
    margin-top: 80px;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
}

/* 本のビジュアル部分 */
.book-visual {
    width: 35%;
    min-width: 280px; /* スマートフォンで小さくなりすぎないための最小幅 */
}

.book-cover {
    width: 100%;
    height: auto;
    box-shadow: 15px 15px 30px rgba(0,0,0,0.1);
}

.book-details {
    width: 60%;
    min-width: 300px;
}

.vertical-title { font-size: 26px; letter-spacing: 0.4em; font-weight: 700; margin-left: 10px; }
.vertical-author { font-size: 16px; letter-spacing: 0.2em; margin-top: 40px; }

.main-title { font-size: 32px; margin-top: 0; }
.book-info-table { margin: 30px 0; font-size: 14px; border-top: 1px solid #eee; padding-top: 15px; }
.book-info-table span { display: inline-block; width: 80px; color: #888; }

.btn-archive {
    background: var(--ink);
    color: #fff;
    padding: 18px 45px;
    border: none;
    cursor: pointer;
    font-family: 'Shippori Mincho', serif;
    font-size: 16px;
    transition: 0.4s;
}

.btn-archive:hover { background: var(--accent); }

.sep { border: none; border-top: 1px solid #eee; margin: 40px 0; }

/* --- 4. 共通コンポーネント（他ページ用） --- */
.page-title {
    font-size: 24px;
    letter-spacing: 0.2em;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 15px;
}
.page-title::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 1px;
    background: var(--ink);
}

/* カタログ用 */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 40px;
}
.catalog-item { text-decoration: none; color: inherit; display: block; }
.catalog-item img { width: 100%; height: auto; box-shadow: 5px 5px 15px rgba(0,0,0,0.05); transition: 0.3s; }
.catalog-item:hover img { transform: translateY(-5px); box-shadow: 5px 10px 20px rgba(0,0,0,0.1); }
.catalog-item h3 { font-size: 14px; margin: 15px 0 5px; }
.catalog-item p { font-size: 12px; color: #888; margin: 0; }

/* 著者・プロフィール用 */
.profile-layout { display: flex; gap: 40px; align-items: flex-start; line-height: 1.8; }
.profile-image {
    flex: 0 0 300px;
    filter: grayscale(100%);
    transition: filter 0.5s;
}
.profile-image:hover { filter: grayscale(0%); }
.profile-text { flex: 1; font-size: 15px; }

/* フォーム用 */
.contact-form { max-width: 500px; margin: 0 auto; }
.form-group { margin-bottom: 25px; }
.form-group label { display: block; font-size: 12px; margin-bottom: 8px; letter-spacing: 0.1em; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    background: #fff;
    font-family: 'Shippori Mincho', serif;
    box-sizing: border-box;
}
.btn-submit {
    width: 100%; background: var(--ink); color: #fff; border: none; padding: 15px; cursor: pointer; transition: 0.3s;
}
.btn-submit:hover { background: var(--accent); }

.site-footer {
    margin-top: 100px;
    text-align: center;
    font-size: 12px;
    color: #bbb;
}

@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        gap: 20px;
    }
    .main-nav ul {
        gap: 15px;
        justify-content: center;
    }
    .profile-layout {
        flex-direction: column;
    }
}