/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Colors - Valentine's & Elegant Theme */
    --color-primary: #8B4252;
    --color-primary-dark: #6B3240;
    --color-primary-light: #A55565;
    --color-accent: #D4AF37;
    --color-accent-light: #E5C555;
    
    --color-bg: #FEFDFB;
    --color-bg-alt: #F5F3F0;
    --color-bg-dark: #2C2420;
    
    --color-text: #2C2420;
    --color-text-light: #5C5450;
    --color-text-muted: #8C847C;
    --color-white: #FFFFFF;
    
    --color-border: #E5E0DB;
    --color-shadow: rgba(44, 36, 32, 0.1);
    
    /* Typography - 40代向けに大きく読みやすく */
    --font-primary: 'Noto Serif JP', serif;
    --font-accent: 'Cormorant Garamond', serif;
    
    /* Spacing - スマホファーストで調整 */
    --spacing-xs: 0.75rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3.5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.6s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    /* スマホ向けに基本フォントサイズを大きく */
    font-size: 17px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-bg);
    /* 40代向けに行間を広く */
    line-height: 1.9;
    overflow-x: hidden;
    /* スマホでの読みやすさ向上 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ========================================
   Utility Classes
   ======================================== */
.container {
    max-width: 100%;
    margin: 0 auto;
    /* スマホ向けにパディングを調整 */
    padding: 0 1.25rem;
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.section-title {
    /* スマホで読みやすいサイズに */
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1.4;
}

.section-description {
    font-size: 1rem;
    color: var(--color-text-light);
    max-width: 100%;
    margin: 0 auto;
    line-height: 1.9;
}

/* ========================================
   Header & Navigation - スマホ最適化
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(254, 253, 251, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px var(--color-shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
}

.nav-logo .logo-text {
    font-family: var(--font-accent);
    /* スマホで見やすいサイズ */
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

/* モバイルメニュー */
.nav-menu {
    position: fixed;
    top: 65px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 65px);
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: 0 4px 20px var(--color-shadow);
    transition: var(--transition);
    overflow-y: auto;
    display: flex;
    gap: 0;
    align-items: stretch;
}

.nav-menu.active {
    left: 0;
}

.nav-menu a {
    /* タップしやすい大きさに */
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    padding: 1.25rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.nav-menu a:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

.nav-menu .nav-cta {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 1.25rem 1.5rem;
    border-radius: 12px;
    margin-top: var(--spacing-sm);
    font-size: 1.25rem;
    border-bottom: none;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    /* タップエリアを広く */
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    align-items: center;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background: var(--color-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ========================================
   Hero Section - スマホ最適化
   ======================================== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #F5F3F0 0%, #FEFDFB 50%, #F0E8E0 100%);
    padding: 5rem 0 3rem;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 66, 82, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%238B4252" opacity="0.03"/></svg>');
    background-size: 30px 30px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    animation: fadeInUp 1s ease;
    padding: 0 1.25rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(139, 66, 82, 0.15);
    margin-bottom: var(--spacing-md);
    /* スマホで読みやすく */
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary);
}

.hero-badge i {
    color: var(--color-primary);
    font-size: 1.125rem;
}

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

.title-main {
    display: block;
    /* スマホで大きく目立つように */
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

.title-sub {
    display: block;
    font-family: var(--font-accent);
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

.hero-description {
    /* スマホで読みやすく */
    font-size: 1.0625rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 2;
}

.hero-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: var(--spacing-lg);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    /* スマホで読みやすく */
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 500;
}

.tag i {
    color: var(--color-accent);
    font-size: 1rem;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.hero-scroll {
    display: none; /* スマホでは非表示 */
}

/* ========================================
   Buttons - タップしやすく大きく
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    /* タップしやすいサイズ */
    padding: 1.125rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.0625rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
    width: 100%;
    max-width: 400px;
    /* タップ時のフィードバック */
    -webkit-tap-highlight-color: transparent;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(139, 66, 82, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-line {
    background: #06C755;
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(6, 199, 85, 0.35);
}

.btn-lg {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-xl {
    padding: 1.375rem 2.5rem;
    font-size: 1.1875rem;
    font-weight: 700;
}

.btn i {
    font-size: 1.25rem;
}

/* ========================================
   Features Section - スマホ最適化
   ======================================== */
.section-features {
    background: var(--color-white);
}

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

.feature-card {
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: 16px;
    border: 2px solid var(--color-border);
    transition: var(--transition);
    text-align: center;
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 50%;
    font-size: 1.875rem;
    color: var(--color-white);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.feature-text {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 0.9375rem;
}

/* ========================================
   CTA Inline Section
   ======================================== */
.section-cta-inline {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-lg) 0;
}

.cta-inline-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.cta-inline-content h3 {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.cta-inline-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1rem;
    line-height: 1.8;
}

/* ========================================
   Series Section - スマホ最適化
   ======================================== */
.section-series {
    background: var(--color-bg-alt);
}

.series-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.series-card {
    background: var(--color-white);
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--color-border);
    transition: var(--transition);
}

.series-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: var(--spacing-md);
    color: var(--color-white);
    text-align: center;
}

.series-number {
    font-family: var(--font-accent);
    font-size: 2.5rem;
    font-weight: 700;
    display: block;
    opacity: 0.3;
    line-height: 1;
}

.series-name {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0.5rem 0 0.25rem;
    letter-spacing: 0.05em;
}

.series-subtitle {
    font-size: 0.875rem;
    opacity: 0.95;
}

.series-body {
    padding: var(--spacing-md);
}

.series-taste {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.taste-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 500;
}

.series-description {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 0.9375rem;
}

.series-note {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border-left: 4px solid var(--color-accent);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.series-note i {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.series-note p {
    color: var(--color-text-light);
    flex: 1;
    font-size: 0.9375rem;
    line-height: 1.8;
}

/* ========================================
   Story Section - スマホ最適化
   ======================================== */
.section-story {
    background: var(--color-white);
}

.story-timeline {
    max-width: 100%;
    margin: 0 auto var(--spacing-lg);
    position: relative;
}

.story-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-marker {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(139, 66, 82, 0.3);
    position: relative;
    z-index: 1;
}

.timeline-content {
    flex: 1;
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.timeline-content h3 {
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.timeline-content p {
    color: var(--color-text-light);
    line-height: 1.9;
    font-size: 0.9375rem;
}

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

.highlight-card {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--color-border);
}

.highlight-card i {
    font-size: 2.25rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.highlight-card h4 {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.highlight-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    line-height: 1.8;
}

/* ========================================
   Rarity Section - スマホ最適化
   ======================================== */
.section-rarity {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #3C342C 100%);
    color: var(--color-white);
}

.rarity-label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.rarity-title {
    font-size: 1.625rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
    line-height: 1.4;
}

.rarity-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-unit {
    font-size: 1.375rem;
    margin-left: 0.25rem;
}

.stat-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-white);
}

.stat-note {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.rarity-description p {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-sm);
    line-height: 1.9;
    font-size: 0.9375rem;
}

.rarity-emphasis {
    background: rgba(212, 175, 55, 0.15);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.rarity-emphasis i {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

/* ========================================
   Social Section - スマホ最適化
   ======================================== */
.section-social {
    background: var(--color-bg-alt);
}

.social-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.social-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    border: 2px solid var(--color-border);
}

.social-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: 50%;
    font-size: 1.875rem;
    color: var(--color-white);
}

.social-stat {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.social-stat span {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.social-label {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.social-note {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.testimonial {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    position: relative;
}

.testimonial i {
    color: var(--color-accent);
    font-size: 1.5rem;
    opacity: 0.3;
    margin-bottom: var(--spacing-xs);
}

.testimonial p {
    color: var(--color-text-light);
    line-height: 1.9;
    font-style: italic;
    font-size: 0.9375rem;
}

/* ========================================
   Reserve Section - スマホ最適化
   ======================================== */
.section-reserve {
    background: linear-gradient(135deg, #F5F3F0 0%, #FEFDFB 100%);
    padding: var(--spacing-xl) 0;
}

.reserve-card {
    max-width: 100%;
    margin: 0 auto;
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 20px;
    box-shadow: 0 15px 50px var(--color-shadow);
}

.reserve-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.reserve-header i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.reserve-label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.reserve-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.reserve-description {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    line-height: 1.9;
}

.reserve-benefits {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 12px;
    margin-bottom: var(--spacing-lg);
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--color-border);
}

.benefit-item:last-child {
    border-bottom: none;
}

.benefit-item i {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.benefit-item span {
    flex: 1;
    color: var(--color-text);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.reserve-cta {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.reserve-cta .btn {
    width: 100%;
    max-width: 100%;
}

.reserve-cta-note {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.reserve-info {
    background: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 12px;
    border-left: 4px solid var(--color-primary);
}

.reserve-info h3 {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reserve-info h3 i {
    color: var(--color-primary);
    flex-shrink: 0;
}

.reserve-info ul {
    list-style: none;
}

.reserve-info li {
    padding: 0.625rem 0 0.625rem 1.5rem;
    color: var(--color-text-light);
    position: relative;
    line-height: 1.7;
    font-size: 0.9375rem;
}

.reserve-info li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: 1.125rem;
}

/* ========================================
   Footer CTA Section
   ======================================== */
.section-footer-cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-lg) 0;
}

.footer-cta-content {
    text-align: center;
    color: var(--color-white);
}

.footer-cta-content h2 {
    font-size: 1.625rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.footer-cta-content p {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
    line-height: 1.9;
}

/* ========================================
   Footer - スマホ最適化
   ======================================== */
.footer {
    background: var(--color-bg-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo h3 {
    font-family: var(--font-accent);
    font-size: 1.375rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.footer-links ul li {
    margin-bottom: 0.625rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.85);
    transition: var(--transition);
    font-size: 0.9375rem;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 0.625rem;
    font-size: 0.9375rem;
}

.footer-contact i {
    margin-right: 0.5rem;
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin: 0.375rem 0;
    line-height: 1.6;
}

.footer-disclaimer {
    font-weight: 600;
    color: var(--color-accent) !important;
    font-size: 0.9375rem !important;
}

/* ========================================
   Scroll to Top Button - スマホ最適化
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    /* タップしやすいサイズ */
    width: 54px;
    height: 54px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.375rem;
    box-shadow: 0 4px 20px rgba(139, 66, 82, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   タブレット向け調整
   ======================================== */
@media (min-width: 641px) and (max-width: 968px) {
    .container {
        padding: 0 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .series-grid,
    .story-highlights,
    .social-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    
    .social-testimonials {
        display: grid;
        grid-template-columns: 1fr;
    }
}

/* ========================================
   大画面向け調整（タブレット横・PC）
   ======================================== */
@media (min-width: 969px) {
    html {
        font-size: 16px;
    }
    
    .container {
        max-width: 1200px;
        padding: 0 2rem;
    }
    
    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        background: transparent;
        flex-direction: row;
        padding: 0;
        box-shadow: none;
        gap: 2rem;
    }
    
    .nav-toggle {
        display: none;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .title-main {
        font-size: 3.5rem;
    }
    
    .hero {
        min-height: 100vh;
    }
    
    .hero-scroll {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: row;
    }
    
    .features-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .series-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .story-highlights {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .social-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .social-testimonials {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .rarity-stats {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .timeline-marker {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .story-timeline::before {
        left: 30px;
    }
}