/**
 * エロ漫画・同人診断 - スタイルシート
 * カラーテーマ: パープル/ブルー系（Avnatorのピンク系と差別化）
 */

/* ============================================
   CSS変数
============================================ */
:root {
    /* プライマリカラー - パープル/インディゴ系 */
    --color-primary: #8b5cf6;
    --color-primary-dark: #7c3aed;
    --color-primary-light: #a78bfa;

    /* セカンダリカラー - ブルー系 */
    --color-secondary: #6366f1;
    --color-secondary-dark: #4f46e5;
    --color-secondary-light: #818cf8;

    /* アクセントカラー */
    --color-accent: #a855f7;
    --color-accent-glow: rgba(168, 85, 247, 0.5);

    /* 背景色 */
    --bg-dark: #0f0a1a;
    --bg-card: rgba(139, 92, 246, 0.08);
    --bg-card-hover: rgba(139, 92, 246, 0.15);

    /* テキスト色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #6366f1 50%, #a855f7 100%);
    --gradient-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.3) 0%, rgba(99, 102, 241, 0.3) 100%);

    /* シャドウ */
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);

    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* フォント */
    --font-primary: 'Noto Sans JP', 'Inter', sans-serif;

    /* 間隔 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* ============================================
   リセット & ベース
============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   ナビゲーション
============================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-link-avnator {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
    color: white !important;
}

.nav-link-avnator:hover {
    opacity: 0.9;
}

/* ============================================
   メインコンテンツ
============================================ */
.main-content {
    padding-top: 80px;
    min-height: 100vh;
}

.section-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.title-icon {
    font-size: 1.3em;
}

/* ============================================
   ヒーローセクション
============================================ */
.hero-section {
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-container {
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--gradient-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.badge-icon {
    font-size: 1.2em;
}

.badge-text {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.75rem;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-size: clamp(2rem, 8vw, 3.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.title-sub {
    display: block;
    font-size: clamp(1rem, 3vw, 1.3rem);
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-card);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    font-size: 0.9rem;
}

.feature-icon {
    font-size: 1.2em;
}

/* CTAボタン */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 50px rgba(139, 92, 246, 0.5);
    color: white;
}

.cta-large {
    font-size: 1.4rem;
    padding: var(--spacing-lg) var(--spacing-xl);
}

.button-icon {
    font-size: 1.2em;
    transition: transform var(--transition-fast);
}

.cta-button:hover .button-icon {
    transform: translateX(5px);
}

.hero-note {
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   フローセクション
============================================ */
.flow-section {
    background: var(--gradient-glow);
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.flow-step {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    min-width: 140px;
    position: relative;
}

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.step-icon {
    font-size: 2rem;
    margin: var(--spacing-sm) 0;
}

.step-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.step-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.flow-arrow {
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: bold;
}

@media (max-width: 768px) {
    .flow-arrow {
        display: none;
    }

    .flow-steps {
        gap: var(--spacing-md);
    }
}

/* ============================================
   特徴セクション
============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.3);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================
   姉妹サイトセクション
============================================ */
.sister-section {
    padding: var(--spacing-lg) var(--spacing-md);
}

.sister-card {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.2) 0%, rgba(219, 39, 119, 0.2) 100%);
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(236, 72, 153, 0.3);
    max-width: 500px;
    margin: 0 auto;
}

.sister-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.sister-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.sister-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.sister-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.sister-link:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(236, 72, 153, 0.4);
}

/* ============================================
   診断ページ
============================================ */
.diagnosis-page {
    padding-top: 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.diagnosis-container {
    max-width: 600px;
    width: 100%;
    padding: var(--spacing-md);
}

/* プログレスバー */
.progress-bar {
    height: 6px;
    background: rgba(139, 92, 246, 0.2);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.progress-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
}

/* 質問スライド */
.questions-wrapper {
    position: relative;
}

.question-slide {
    display: none;
    animation: fadeIn 0.3s ease;
}

.question-slide.active {
    display: block;
}

.question-slide.prev {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.question-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* オプショングリッド */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.option-button {
    background: var(--bg-card);
    border: 2px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
    font-family: inherit;
}

.option-button:hover {
    background: var(--bg-card-hover);
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.option-button.selected {
    background: rgba(139, 92, 246, 0.3);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.option-icon {
    font-size: 2.5rem;
}

.option-label {
    font-size: 1rem;
    font-weight: 600;
}

.option-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 画像付きオプションボタン */
.options-with-images {
    gap: var(--spacing-md);
}

.option-with-image {
    position: relative;
    padding: 0;
    overflow: hidden;
    min-height: 180px;
}

.option-image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.option-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.option-with-image:hover .option-image {
    transform: scale(1.1);
}

.option-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.7) 100%);
    transition: background var(--transition-normal);
}

.option-with-image:hover .option-image-overlay {
    background: linear-gradient(to bottom, rgba(139, 92, 246, 0.3) 0%, rgba(139, 92, 246, 0.8) 100%);
}

.option-text-wrapper {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    height: 100%;
    padding: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.option-with-image .option-label {
    font-size: 1.1rem;
    font-weight: 700;
}

.option-with-image .option-desc {
    color: rgba(255, 255, 255, 0.9);
}

.option-with-image.selected .option-image-overlay {
    background: linear-gradient(to bottom, rgba(139, 92, 246, 0.4) 0%, rgba(139, 92, 246, 0.9) 100%);
}

/* 画像がない場合（フォールバック用） */
.option-with-image .option-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

@media (max-width: 768px) {
    .option-with-image {
        min-height: 140px;
    }

    .option-with-image .option-label {
        font-size: 1rem;
    }
}

/* ローディング */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 10, 26, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(139, 92, 246, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.loading-sub {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   結果ページ
============================================ */
.result-page {
    padding-top: 100px;
}

.result-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* 結果ヘッダー */
.result-header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-lg);
}

.result-badge {
    display: inline-block;
    background: var(--gradient-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.result-type-name {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.result-type-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* 回答サマリー */
.answer-summary {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.summary-item {
    background: var(--bg-card);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.summary-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.summary-value {
    font-weight: 600;
    font-size: 0.9rem;
}

/* メイン推薦作品 */
.main-recommendation {
    margin-bottom: var(--spacing-xl);
}

.main-work-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 250px 1fr;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

@media (max-width: 640px) {
    .main-work-card {
        grid-template-columns: 1fr;
    }
}

.work-image-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.work-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.work-image-wrapper:hover .work-image {
    transform: scale(1.05);
}

.work-type-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background: var(--color-primary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.work-type-badge.ebook {
    background: #3b82f6;
}

.match-score {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.8);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
}

.work-info {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.work-title {
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.4;
}

.work-title a {
    color: var(--text-primary);
}

.work-title a:hover {
    color: var(--color-primary-light);
}

.work-creator {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.work-genres {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.genre-tag {
    background: rgba(139, 92, 246, 0.2);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
}

.work-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-accent);
}

.work-cta {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 10px;
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
    margin-top: auto;
}

.work-cta:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* 作品グリッド */
.recommendations-section {
    margin-bottom: var(--spacing-xl);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.work-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(139, 92, 246, 0.1);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.work-card:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.3);
}

.work-link {
    display: block;
    color: inherit;
}

.card-image-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.card-type-badge {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    background: var(--color-primary);
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.card-type-badge.ebook {
    background: #3b82f6;
}

.card-info {
    padding: var(--spacing-sm);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-creator {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.card-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-top: auto;
    margin-bottom: 0.5rem;
}

/* result/worksページ共通カードボタン */
.card-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0 var(--spacing-sm) var(--spacing-sm);
}

.card-btn {
    display: block;
    width: 100%;
    padding: 0.5rem;
    font-size: 0.75rem;
    text-align: center;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.card-btn.detail-btn {
    background: rgba(139, 92, 246, 0.2);
    color: var(--color-primary-light);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.card-btn.detail-btn:hover {
    background: rgba(139, 92, 246, 0.4);
}

.card-btn.fanza-btn {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: white;
}

.card-btn.fanza-btn:hover {
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

/* アクションセクション */
.action-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.share-button,
.action-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.share-button.twitter {
    background: #1da1f2;
    color: white;
}

.share-button.twitter:hover {
    color: white;
    background: #0d8bd9;
}

.action-button.retry {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.action-button.retry:hover {
    background: var(--bg-card-hover);
}

/* クロスプロモ */
.cross-promo {
    margin-bottom: var(--spacing-xl);
}

.promo-card {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.15) 0%, rgba(219, 39, 119, 0.15) 100%);
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(236, 72, 153, 0.2);
}

.promo-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.promo-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.promo-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.promo-link {
    display: inline-block;
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.promo-link:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(236, 72, 153, 0.4);
}

/* ============================================
   フッター
============================================ */
.site-footer {
    background: rgba(15, 10, 26, 0.95);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-container {
    max-width: 800px;
    margin: 0 auto;
}

.footer-content {
    text-align: center;
}

.footer-nav {
    margin-bottom: var(--spacing-lg);
}

.footer-nav a {
    color: var(--text-secondary);
    margin: 0 var(--spacing-sm);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-primary-light);
}

.footer-divider {
    color: rgba(255, 255, 255, 0.2);
}

.sister-site-banner {
    margin-bottom: var(--spacing-lg);
}

.sister-site-link {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.2) 0%, rgba(219, 39, 119, 0.2) 100%);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid rgba(236, 72, 153, 0.3);
    transition: all var(--transition-fast);
}

.sister-site-link:hover {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.3) 0%, rgba(219, 39, 119, 0.3) 100%);
    transform: translateY(-2px);
}

.sister-badge {
    font-size: 0.7rem;
    background: #ec4899;
    padding: 2px 8px;
    border-radius: 20px;
}

.sister-title {
    font-weight: 600;
    color: var(--text-primary);
}

.sister-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-disclaimer {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ============================================
   レスポンシブ
============================================ */
@media (max-width: 768px) {
    .site-nav {
        padding: 0.5rem 0.75rem;
    }

    .nav-container {
        flex-wrap: nowrap;
    }

    .nav-logo {
        font-size: 1rem;
        flex-shrink: 0;
    }

    .logo-icon {
        font-size: 1.2rem;
    }

    .logo-text {
        font-size: 0.95rem;
    }

    .nav-links {
        gap: 0.25rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .nav-links::-webkit-scrollbar {
        display: none;
    }

    .nav-link {
        font-size: 0.7rem;
        padding: 0.4rem 0.5rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .nav-link-avnator {
        font-size: 0.65rem;
        padding: 0.4rem 0.5rem;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .sp-only {
        display: inline;
    }
}

@media (min-width: 769px) {
    .sp-only {
        display: none;
    }
}

/* ============================================
   ユーティリティ
============================================ */
.bottom-cta {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* スクロールバー */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* 選択ハイライト */
::selection {
    background: rgba(139, 92, 246, 0.4);
}

/* ============================================
   結果ページ - ボタンレイアウト
============================================ */
.work-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
    flex-wrap: wrap;
}

.work-buttons .work-cta {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
}

.work-buttons .detail-btn {
    background: rgba(139, 92, 246, 0.2);
    border: 2px solid var(--color-primary);
    color: var(--color-primary-light);
}

.work-buttons .detail-btn:hover {
    background: var(--color-primary);
    color: white;
}

.work-buttons .fanza-btn {
    background: linear-gradient(135deg, #f97316, #ea580c);
    border: none;
}

.work-buttons .fanza-btn:hover {
    background: linear-gradient(135deg, #fb923c, #f97316);
    box-shadow: 0 0 20px rgba(249, 115, 22, 0.4);
}

/* ジャンルリンク */
.genre-link {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.genre-link:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* ============================================
   TOP5セクション
============================================ */
.top5-section {
    margin-bottom: var(--spacing-xl);
}

.top5-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

@media (max-width: 900px) {
    .top5-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 500px) {
    .top5-grid {
        grid-template-columns: 1fr;
    }
}

.top5-card {
    position: relative;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.top5-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.rank-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 10;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
}

.rank-2 { background: linear-gradient(135deg, #c0c0c0, #a0a0a0); }
.rank-3 { background: linear-gradient(135deg, #cd7f32, #b87333); }
.rank-4 { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.rank-5 { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.top5-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.top5-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.top5-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-fast);
}

.top5-card:hover .top5-image {
    transform: scale(1.05);
}

.top5-type-badge {
    position: absolute;
    bottom: 0.5rem;
    left: 0.5rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.7);
    color: white;
}

.top5-type-badge.doujin { background: rgba(236, 72, 153, 0.9); }
.top5-type-badge.ebook { background: rgba(59, 130, 246, 0.9); }

.top5-match {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(139, 92, 246, 0.9);
    color: white;
}

.top5-info {
    padding: 0.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.top5-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    line-height: 1.3;
    color: var(--text-primary);
}

.top5-creator {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
}

.top5-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    margin-top: auto;
}

/* TOP5ボタン */
.top5-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.top5-btn {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
}

.top5-btn.detail-btn {
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid var(--color-primary);
    color: var(--color-primary-light);
}

.top5-btn.detail-btn:hover {
    background: var(--color-primary);
    color: white;
}

.top5-btn.fanza-btn {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: white;
}

.top5-btn.fanza-btn:hover {
    background: linear-gradient(135deg, #fb923c, #f97316);
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.4);
}

/* TOP5タイトルリンク */
.top5-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.top5-title a:hover {
    color: var(--color-primary-light);
}

/* その他おすすめボタン */
.card-buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.card-btn {
    flex: 1;
    display: inline-block;
    padding: 0.4rem 0.5rem;
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-fast);
}

.card-btn.detail-btn {
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid var(--color-primary);
    color: var(--color-primary-light);
}

.card-btn.detail-btn:hover {
    background: var(--color-primary);
    color: white;
}

.card-btn.fanza-btn {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: white;
}

.card-btn.fanza-btn:hover {
    background: linear-gradient(135deg, #fb923c, #f97316);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.4);
}

/* カードタイトルリンク */
.card-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.card-title a:hover {
    color: var(--color-primary-light);
}

/* ============================================
   FAQセクション
============================================ */
.faq-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--gradient-glow);
}

.faq-section .section-container {
    max-width: 800px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.faq-item:hover {
    border-color: rgba(139, 92, 246, 0.4);
}

.faq-item[open] {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    list-style: none;
    -webkit-user-select: none;
    user-select: none;
    transition: background var(--transition-fast);
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-q-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.faq-q-text {
    flex: 1;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.faq-toggle {
    font-size: 1.2rem;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.faq-item[open] .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    padding-left: calc(var(--spacing-lg) + 32px + var(--spacing-sm));
    animation: faqSlideDown 0.3s ease;
}

@keyframes faqSlideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.faq-a-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(139, 92, 246, 0.2);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--color-primary-light);
    margin-right: var(--spacing-xs);
    flex-shrink: 0;
    vertical-align: middle;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    display: inline;
}

@media (max-width: 768px) {
    .faq-question {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .faq-q-icon {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }

    .faq-q-text {
        font-size: 0.9rem;
    }

    .faq-answer {
        padding: 0 var(--spacing-md) var(--spacing-md);
        padding-left: calc(var(--spacing-md) + 28px + var(--spacing-sm));
    }

    .faq-answer p {
        font-size: 0.85rem;
    }
}

/* ============================================
   ファーストビューCTA
============================================ */
.firstview-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(99, 102, 241, 0.2));
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: var(--radius-lg);
    animation: fadeInUp 0.6s ease 0.3s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.firstview-cta-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 0 0.25rem;
    letter-spacing: 0.1em;
}

.firstview-cta-name {
    font-size: clamp(1.3rem, 4vw, 1.8rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem;
    text-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.firstview-cta-score {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 1rem;
}

.firstview-cta-score strong {
    color: var(--color-primary-light);
    font-size: 1.1rem;
}

.firstview-cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--gradient-primary);
    color: #fff;
    text-decoration: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    min-height: 56px;
    min-width: 280px;
    box-shadow: 0 4px 20px var(--color-accent-glow);
    transition: all var(--transition-normal);
    animation: ctaGlow 2s ease-in-out infinite;
}

.firstview-cta-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.6);
}

@keyframes ctaGlow {
    0%, 100% { box-shadow: 0 4px 20px var(--color-accent-glow); }
    50% { box-shadow: 0 4px 30px rgba(139, 92, 246, 0.7), 0 0 50px rgba(168, 85, 247, 0.3); }
}

/* ============================================
   フローティングCTA（モバイル固定バー）
============================================ */
.floating-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: 0.75rem 1rem;
    background: rgba(15, 10, 26, 0.95);
    border-top: 1px solid rgba(139, 92, 246, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.floating-cta.visible {
    transform: translateY(0);
}

.floating-cta-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--gradient-primary);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: 0 4px 15px var(--color-accent-glow);
    transition: all var(--transition-normal);
}

.floating-cta-btn:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
}

@media (min-width: 769px) {
    .floating-cta { display: none; }
}

@media (max-width: 768px) {
    .firstview-cta {
        padding: 1.25rem 1rem;
    }
    .firstview-cta-btn {
        min-width: unset;
        width: 100%;
        padding: 0.875rem 1.5rem;
    }
}