/* ========================================
   Reset & Base Styles
======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Colors */
    --primary-color: #4A90E2;
    --secondary-color: #7ED321;
    --accent-color: #F5A623;
    --danger-color: #BD10E0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --background: #FAFBFC;
    --card-bg: #FFFFFF;
    --border-color: #E8E8E8;
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
    --font-heading: "Noto Sans JP", sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.16);
    --shadow-xl: 0 16px 32px rgba(0,0,0,0.20);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    background-color: var(--background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Typography
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: #3a7bc8;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: #3a7bc8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Utilities
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-title {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Navigation
======================================== */
.navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ========================================
   Hero Section
======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    color: white;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 1rem;
    opacity: 0.8;
    margin-top: var(--spacing-xs);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.cta-arrow {
    transition: transform var(--transition-fast);
}

.hero-cta:hover .cta-arrow {
    transform: translate(2px, -2px);
}

/* ========================================
   Overview Section
======================================== */
.overview {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.overview-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.overview-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.overview-card.highlight {
    background: linear-gradient(135deg, var(--primary-color), #3a7bc8);
    color: white;
    border-color: transparent;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.card-list {
    list-style: none;
    text-align: left;
}

.card-list li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
}

.card-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.overview-story {
    background: var(--background);
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
}

.story-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
}

.story-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.story-stat {
    padding: var(--spacing-md);
}

.story-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.story-label {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========================================
   Phases Section
======================================== */
.phases {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.phases-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.phase-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: var(--spacing-xl);
}

.phase-marker {
    position: absolute;
    left: 30px;
    top: 0;
    width: 40px;
    height: 40px;
    background: white;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.phase-number {
    font-weight: 700;
    color: var(--primary-color);
}

.phase-content {
    background: white;
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.phase-content:hover {
    box-shadow: var(--shadow-md);
}

.phase-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.phase-icon {
    font-size: 2rem;
}

.phase-title {
    flex: 1;
    font-size: 1.25rem;
}

.phase-period {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--background);
    padding: 4px 12px;
    border-radius: 20px;
}

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

.phase-details {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
}

.phase-details ul {
    list-style: none;
}

.phase-details li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
}

.phase-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ========================================
   Results Section
======================================== */
.results {
    padding: var(--spacing-xxl) 0;
    background: white;
}

/* 原稿の内容紹介 */
.book-introduction {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    padding: var(--spacing-xl);
    background: var(--background);
    border-radius: 12px;
}

.intro-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.intro-text {
    font-size: 1.125rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-secondary);
}

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

.keyword {
    background: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 25px;
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.keyword:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 物語の概要 */
.story-summary {
    margin-bottom: var(--spacing-xxl);
}

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

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.summary-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.summary-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.book-structure {
    margin-bottom: var(--spacing-xxl);
}

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

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

.structure-item {
    background: var(--background);
    border-radius: 8px;
    padding: var(--spacing-md);
    text-align: center;
    min-width: 150px;
}

.structure-label {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.structure-desc {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.structure-arrow {
    font-size: 1.5rem;
    color: var(--text-light);
}

.book-features {
    margin-bottom: var(--spacing-xxl);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--background);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.feature-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    color: var(--text-secondary);
}

.testimonial {
    background: linear-gradient(135deg, var(--primary-color), #3a7bc8);
    color: white;
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
}

.testimonial-quote {
    font-size: 1.5rem;
    font-style: italic;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.testimonial-author {
    font-size: 1rem;
    opacity: 0.9;
}

/* ========================================
   Gallery Section
======================================== */
.gallery {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.gallery-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.gallery-viewer {
    background: white;
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.gallery-main {
    margin-bottom: var(--spacing-md);
}

.gallery-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.gallery-caption {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
}

.gallery-thumbs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.gallery-thumb {
    background: none;
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 0;
    cursor: pointer;
    transition: all var(--transition-fast);
    overflow: hidden;
}

.gallery-thumb img {
    width: 100%;
    height: auto;
    display: block;
}

.gallery-thumb.active {
    border-color: var(--primary-color);
}

.thumb-label {
    display: block;
    text-align: center;
    padding: var(--spacing-xs);
    background: var(--background);
    font-size: 0.875rem;
}

.gallery-description {
    background: white;
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.gallery-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.gallery-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   Future Section
======================================== */
.future {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.future-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.future-card {
    background: var(--background);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.future-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.future-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.future-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.future-desc {
    color: var(--text-secondary);
}

.future-cta {
    background: var(--background);
    border-radius: 12px;
    padding: var(--spacing-xl);
    text-align: center;
}

.cta-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.qr-container {
    display: inline-block;
    background: white;
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

#qrcode {
    margin-bottom: var(--spacing-sm);
}

.qr-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========================================
   Manuscript Access Section
======================================== */
.manuscript-access {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(to bottom, var(--background), white);
}

.access-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.access-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.access-preview {
    position: relative;
    margin-bottom: var(--spacing-lg);
    border-radius: 12px;
    overflow: hidden;
}

.preview-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.preview-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: var(--spacing-md);
    text-align: center;
}

.preview-text {
    font-size: 1.125rem;
    margin: 0;
}

.access-info {
    margin-bottom: var(--spacing-lg);
}

.access-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.free-chapters {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-md);
}

.free-chapters li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--background);
    border-radius: 8px;
    font-weight: 500;
}

.free-chapters li::before {
    content: "✅ ";
    margin-right: var(--spacing-xs);
}

.access-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

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

.btn-large {
    font-size: 1.125rem;
    padding: var(--spacing-md) var(--spacing-xl);
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.access-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.access-features {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-lg);
}

.features-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.reader-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.reader-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-emoji {
    font-size: 1.5rem;
}

.feature-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.access-qr {
    background: white;
    border-radius: 16px;
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    align-self: start;
}

#manuscript-qrcode {
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.qr-url {
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-top: var(--spacing-xs);
}

/* ========================================
   Footer
======================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-text {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ========================================
   Copy Notification
======================================== */
.copy-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    transition: transform var(--transition-normal);
    z-index: 9999;
}

.copy-notification.show {
    transform: translateX(-50%) translateY(0);
}

/* Share and Copy Buttons */
.share-button, .copy-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 25px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin: var(--spacing-xs);
}

.share-button:hover, .copy-button:hover {
    background: #3a7bc8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Mobile Only
======================================== */
.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .mobile-only {
        display: inline;
    }
}