/* 基本リセット: すべての要素のmarginとpaddingをゼロに */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS変数: 色やサイズを定義（洗練されたスタイリッシュデザイン） */
:root {
    --color-primary: #007cba;        /* 信頼感のある青（メインカラー） */
    --color-secondary: #666666;      /* 落ち着いたグレー（アクセント） */
    --color-bg-main: #ffffff;        /* 白（背景） */
    --color-bg-card: rgba(255, 255, 255, 0.9); /* 半透明白（カード背景） */
    --color-text-primary: #000000;   /* 黒（メインテキスト） */
    --color-text-secondary: #666666; /* グレー（サブテキスト） */
    --color-border: rgba(0, 124, 186, 0.1); /* プライマリーカラーの薄いボーダー */
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

/* Accessibility: Visually hidden elements (for screen readers only) */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Accessibility: Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    font-weight: 600;
    z-index: 1000;
    border-radius: 0 0 var(--radius-sm) 0;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* bodyのスタイル */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Segoe UI', 'Noto Sans JP', sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2ff 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    letter-spacing: 0.02em;
    min-height: 100vh;
}

/* ヘッダーのスタイル */
header {
    background:
        linear-gradient(rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0.75)),
        linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    backdrop-filter: blur(15px);
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 32px rgba(0, 124, 186, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* ヘッダーの装飾要素 */
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(103, 195, 243, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 215, 0, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

header::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 150px;
    background: 
        linear-gradient(45deg, rgba(103, 195, 243, 0.1) 0%, rgba(255, 215, 0, 0.1) 100%);
    border-radius: 20px;
    box-shadow: 
        inset 0 0 50px rgba(255, 255, 255, 0.1),
        0 0 100px rgba(103, 195, 243, 0.2);
    pointer-events: none;
    animation: float 6s ease-in-out infinite;
}

/* 魔法の粒子アニメーション */
@keyframes float {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.6;
    }
}

/* 追加の粒子効果 */
.header-content::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 20%;
    width: 4px;
    height: 4px;
    background: rgba(103, 195, 243, 0.8);
    border-radius: 50%;
    animation: sparkle 3s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(103, 195, 243, 0.6);
}

.header-content::after {
    content: '';
    position: absolute;
    top: -10px;
    right: 30%;
    width: 3px;
    height: 3px;
    background: rgba(255, 215, 0, 0.8);
    border-radius: 50%;
    animation: sparkle 4s ease-in-out infinite 1s;
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.6);
}

@keyframes sparkle {
    0%, 100% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-10px);
    }
}

/* ヘッダーコンテンツのコンテナ */
.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    max-width: 800px;
    width: 100%;
    position: relative;
    z-index: 10;
}

/* ヘッダー内のタイトル（h1） */
header h1 {
    color: #ffffff;
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #67c3f3 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* プロンプトボタンのスタイル */
.prompt-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
    width: 100%;
}

.prompt-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.prompt-button:active {
    transform: translateY(0);
}

/* 管理モードコントロール */
.admin-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin: 0;
}

.admin-button {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #ffffff;
    font-size: 12px;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.02em;
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.admin-button:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    color: #67c3f3;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.admin-button:active {
    transform: translateY(0);
}

/* メインコンテナ */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-xl);
}

/* 検索・フィルターコントロール */
.search-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 124, 186, 0.08);
}

.search-input {
    flex: 2;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.author-filter {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.author-filter:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.add-book-button {
    flex: 0 0 auto;
    background: linear-gradient(135deg, var(--color-primary) 0%, #005a8c 100%);
    border: none;
    color: white;
    font-size: 14px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

.add-book-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 124, 186, 0.4);
}

/* 本のカード一覧（グリッドレイアウト） */
#book-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); /* レスポンシブ対応 */
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

/* 本のカード（本屋さん風） */
.book-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(0, 124, 186, 0.08);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* 表紙画像コンテナ */
.book-cover {
    width: 100%;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e8f5 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.book-card:hover .book-cover-image {
    transform: scale(1.05);
}

/* 画像なしプレースホルダー */
.no-cover-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.book-icon {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.no-image-text {
    font-size: 12px;
    color: var(--color-text-secondary);
    font-weight: 500;
    letter-spacing: 0.05em;
}

/* 本の情報エリア */
.book-info {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* 管理モード時の本のカード */
.book-card.admin-mode {
    padding-bottom: 60px;
}

.book-card-actions {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    gap: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
}

.book-card:hover .book-card-actions {
    opacity: 1;
}

.book-action-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 12px;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.book-action-btn:last-child {
    border-right: none;
}

.book-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.book-action-btn.delete:hover {
    background: rgba(220, 53, 69, 0.8);
}

.book-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, #4db8d4 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

/* カードホバー時のエフェクト */
.book-card:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 124, 186, 0.15);
    border-color: #4db8d4;
}

.book-card:hover::before {
    transform: scaleX(1);
}

/* 本のタイトル（一覧画面） */
.book-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
    letter-spacing: 0.01em;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 著者名（一覧画面） */
.book-author {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin: 0;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* SC2: 詳細画面 */
#screen-detail {
    max-width: 800px;
    margin: 0 auto;
}

/* 詳細画面の表紙画像 */
.detail-cover-image {
    width: 100%;
    max-width: 280px;
    margin: 0 auto var(--spacing-xl) auto;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e8f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-cover-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-cover-image .no-cover-placeholder {
    width: 100%;
    height: 100%;
}

.detail-cover-image .book-icon {
    font-size: 64px;
}

.detail-cover-image .no-image-text {
    font-size: 14px;
}

/* 戻るボタン */
.back-button {
    background: linear-gradient(135deg, var(--color-primary) 0%, #005a8c 100%);
    border: none;
    color: white;
    font-size: 16px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    margin-bottom: var(--spacing-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
    position: relative;
    overflow: hidden;
}

.back-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.back-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 124, 186, 0.4);
}

.back-button:hover::before {
    left: 100%;
}

/* 本の詳細情報 */
.book-detail-info {
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.detail-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.01em;
    line-height: 1.3;
}

.detail-author {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
    letter-spacing: 0.01em;
}

.detail-summary {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
    font-weight: 400;
}

/* 全体の感想セクション */
.overall-review-section {
    background-color: transparent;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-primary);
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.overall-review-content {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.9;
    white-space: pre-wrap;
    font-weight: 300;
}

/* 引用セクション */
.quote-section {
    background-color: transparent;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.quote-header {
    font-size: 12px;
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.quote-text {
    font-size: 14px;
    color: var(--color-text-primary);
    line-height: 1.9;
    padding: 0;
    padding-left: 20px;
    border-left: 2px solid var(--color-border);
    margin-bottom: 20px;
    white-space: pre-wrap;
    font-weight: 300;
}

.quote-comment {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.9;
    white-space: pre-wrap;
    font-weight: 300;
}

.quote-comment strong {
    color: var(--color-text-primary);
    font-weight: 400;
}

/* 上司と対話ボタン */
.dialog-button {
    width: 100%;
    height: 54px;
    background-color: var(--color-primary);
    color: white;
    border: 1px solid var(--color-primary);
    border-radius: 0;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: opacity 0.3s ease;
    margin-top: var(--spacing-xl);
}

.dialog-button:hover {
    opacity: 0.7;
}

.dialog-button:active {
    transform: none;
}

/* モーダル全体 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

/* モーダルの背景（半透明） */
.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
}

/* モーダルのコンテンツボックス */
.modal-content {
    position: relative;
    background-color: white;
    border-radius: 0;
    padding: 40px;
    max-width: 640px;
    width: 90%;
    max-height: 80vh;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 1001;
}

/* モーダルヘッダー */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-primary);
    margin: 0;
    letter-spacing: 0.05em;
}

/* ×ボタン */
.close-x {
    background-color: transparent;
    border: none;
    font-size: 24px;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    line-height: 1;
    transition: opacity 0.3s ease;
    font-weight: 300;
}

.close-x:hover {
    opacity: 0.6;
}

/* プロンプトテキストエリア */
.prompt-textarea {
    width: 100%;
    height: 300px;
    padding: 20px;
    background-color: #fafafa;
    border: 1px solid var(--color-border);
    border-radius: 0;
    font-size: 13px;
    font-family: 'Courier New', monospace;
    color: var(--color-text-secondary);
    resize: vertical;
    margin-bottom: 20px;
    line-height: 1.7;
    font-weight: 300;
}

.prompt-textarea:focus {
    outline: 1px solid var(--color-text-secondary);
    outline-offset: 0;
}

/* モーダルボタングループ */
.modal-buttons {
    display: flex;
    gap: 12px;
}

/* コピーボタン */
.copy-button {
    flex: 1;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #005a8c 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

.copy-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 124, 186, 0.4);
}

/* 閉じるボタン */
.close-button {
    flex: 1;
    height: 50px;
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.close-button:hover {
    background-color: var(--color-border);
    transform: translateY(-2px);
}

/* レスポンシブ: スマホ（幅768px未満） */
@media (max-width: 768px) {
    header {
        padding: var(--spacing-md);
        min-height: 100px;
        background-attachment: scroll;
    }

    main {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    header h1 {
        font-size: 22px;
        margin: 0;
    }

    .admin-controls {
        margin: 0;
        justify-content: center;
    }

    .admin-button {
        font-size: 11px;
        padding: 6px 12px;
    }

    #app {
        padding: var(--spacing-md);
    }

    /* スマホ: 2列表示 */
    #book-list {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-md);
    }

    .book-card {
        padding: 0;
    }

    .book-info {
        padding: var(--spacing-sm);
    }

    .book-title {
        font-size: 13px;
        -webkit-line-clamp: 2;
    }

    .book-author {
        font-size: 11px;
    }

    .book-cover {
        aspect-ratio: 2 / 3;
    }

    .book-icon {
        font-size: 28px;
    }

    .no-image-text {
        font-size: 10px;
    }
    
    .book-card-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
    }
    
    .book-action-btn {
        width: 100%;
        font-size: 14px;
        padding: 10px;
    }
    
    .detail-title {
        font-size: 24px;
    }

    .detail-cover-image {
        max-width: 220px;
    }

    .detail-cover-image .book-icon {
        font-size: 48px;
    }
    
    .modal-content {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
        max-width: calc(100vw - 32px);
        max-height: calc(100vh - 32px);
        overflow-y: auto;
    }
    
    .search-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }
    
    .search-input, .author-filter {
        width: 100%;
        font-size: 16px; /* iOS Safariのズーム防止 */
    }
    
    .add-book-button {
        width: 100%;
        padding: 12px;
        font-size: 16px;
    }
}

/* レスポンシブ: タブレット（幅768px以上1024px未満） */
@media (min-width: 768px) and (max-width: 1024px) {
    main {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    /* タブレット: 自動調整 */
    #book-list {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

/* 編集フォーム */
.edit-form {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 20px rgba(0, 124, 186, 0.08);
}

.edit-form h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.form-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.form-section h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

/* 画像プレビューコンテナ */
.image-preview-container {
    margin-top: var(--spacing-md);
}

.image-preview {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 3 / 4;
    margin: 0 auto;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.no-image-placeholder {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.image-error {
    text-align: center;
    padding: var(--spacing-xl);
    color: #dc3545;
    font-size: 14px;
}

.quote-section {
    background: #f8f9fa;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    position: relative;
}

.quote-section h4 {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.remove-quote-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: #dc3545;
    border: none;
    color: white;
    font-size: 12px;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.remove-quote-btn:hover {
    background: #c82333;
}

.add-quote-button {
    background: var(--color-primary);
    border: none;
    color: white;
    font-size: 14px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.add-quote-button:hover {
    background: #005a8c;
    transform: translateY(-1px);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.save-button {
    background: linear-gradient(135deg, var(--color-primary) 0%, #005a8c 100%);
    border: none;
    color: white;
    font-size: 16px;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

.save-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 124, 186, 0.4);
}

.cancel-button {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 16px;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.cancel-button:hover {
    background: var(--color-border);
    transform: translateY(-1px);
}

/* 認証フォーム */
.auth-form {
    margin-bottom: var(--spacing-xl);
}

.auth-input {
    width: 100%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.auth-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 124, 186, 0.1);
}

.auth-button {
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, #005a8c 100%);
    border: none;
    color: white;
    font-size: 14px;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 12px rgba(0, 124, 186, 0.3);
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 124, 186, 0.4);
}

/* コピー成功モーダル */
.copy-success-modal {
    z-index: 1001; /* プロンプトモーダルより上に表示 */
}

.copy-success-content {
    max-width: 400px;
    text-align: center;
    padding: 40px 32px;
}

.copy-success-header h2 {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin: 0;
    letter-spacing: 0.05em;
}

.copy-success-message {
    margin: 24px 0 32px 0;
}

.copy-success-message p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
    font-weight: 300;
}

.copy-success-content .modal-buttons {
    justify-content: center;
}

.copy-success-content .close-button {
    min-width: 120px;
    background-color: var(--color-primary);
    color: white;
    border: 1px solid var(--color-primary);
}

.copy-success-content .close-button:hover {
    opacity: 0.7;
}

/* レスポンシブ: デスクトップ（幅1024px以上） */
@media (min-width: 1024px) {
    main {
        max-width: 1200px;
        padding: var(--spacing-xl) var(--spacing-xxl);
    }

    #book-list {
        gap: var(--spacing-xl);
    }
}