/* Kanjouについてセクション */
.about-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 2rem;
    font-family: var(--font-secondary);
}

.philosophy-text {
    color: var(--gray-700);
    line-height: 1.8;
}

.philosophy-text .lead {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
}

.philosophy-text p {
    margin-bottom: 1.5rem;
}

.key-message {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--border-radius-xl);
    border-left: 4px solid var(--primary-color);
    margin-top: 2rem;
}

.key-message i {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.key-message span {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.6;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.emotion-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.flow-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.flow-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.joy-flow { background: linear-gradient(135deg, var(--joy-color), #fde047); }
.anger-flow { background: linear-gradient(135deg, var(--anger-color), #fca5a5); animation-delay: 0.5s; }
.sadness-flow { background: linear-gradient(135deg, var(--sadness-color), #93c5fd); animation-delay: 1s; }
.pleasure-flow { background: linear-gradient(135deg, var(--pleasure-color), #6ee7b7); animation-delay: 1.5s; }

.flow-item span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--gray-400);
    font-weight: bold;
    animation: pulse 2s ease-in-out infinite;
}

.balance-visualization {
    text-align: center;
}

.balance-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.balance-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.balance-segment {
    position: absolute;
    width: 50%;
    height: 50%;
}

.balance-segment:nth-child(1) {
    top: 0;
    left: 0;
    background: var(--joy-color);
    border-radius: 100% 0 0 0;
}

.balance-segment:nth-child(2) {
    top: 0;
    right: 0;
    background: var(--anger-color);
    border-radius: 0 100% 0 0;
}

.balance-segment:nth-child(3) {
    bottom: 0;
    left: 0;
    background: var(--pleasure-color);
    border-radius: 0 0 0 100%;
}

.balance-segment:nth-child(4) {
    bottom: 0;
    right: 0;
    background: var(--sadness-color);
    border-radius: 0 0 100% 0;
}

.balance-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
}

/* あなたの感情の旅セクション */
.journey-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.journey-section .section-title,
.journey-section .section-subtitle {
    color: var(--white);
}

.journey-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.journey-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.journey-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.journey-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.journey-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--white);
}

.journey-item p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

.journey-message {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.message-content {
    position: relative;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-xl);
    backdrop-filter: blur(10px);
}

.message-content i {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.6);
}

.fas.fa-quote-left {
    position: absolute;
    top: 1rem;
    left: 1rem;
}

.fas.fa-quote-right {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
}

.message-content p {
    font-size: 1.125rem;
    line-height: 1.7;
    margin: 0;
    padding: 0 2rem;
    color: var(--white);
}

/* 感情ガイドセクションの更新 */
.emotion-guide {
    padding: 6rem 0;
    background: var(--white);
}

.emotion-categories {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.emotion-category {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.category-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2rem;
    text-align: center;
}

.category-subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray-500);
    font-family: var(--font-secondary);
}

.emotion-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.emotion-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.emotion-item:hover {
    background: var(--gray-50);
    transform: translateX(5px);
}

.emotion-emoji {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
}

.emotion-item.joy .emotion-emoji { background: linear-gradient(135deg, var(--joy-color), #fde047) !important; }
.emotion-item.anger .emotion-emoji { background: linear-gradient(135deg, var(--anger-color), #fca5a5) !important; }
.emotion-item.sadness .emotion-emoji { background: linear-gradient(135deg, var(--sadness-color), #93c5fd) !important; }
.emotion-item.pleasure .emotion-emoji { background: linear-gradient(135deg, var(--pleasure-color), #6ee7b7) !important; }
.emotion-item.energy .emotion-emoji { background: linear-gradient(135deg, var(--pleasure-color), #6ee7b7) !important; }
.emotion-item.relaxation .emotion-emoji { background: linear-gradient(135deg, var(--joy-color), #fde047) !important; }
.emotion-item.fatigue .emotion-emoji { background: linear-gradient(135deg, var(--sadness-color), #93c5fd) !important; }
.emotion-item.tension .emotion-emoji { background: linear-gradient(135deg, var(--tension-color), #fca5a5) !important; }

.emotion-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.emotion-info p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.single-category {
    max-width: 800px;
    width: 100%;
}

.emotion-balance-note {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(59, 130, 246, 0.1);
    margin-top: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.balance-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.balance-text h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.balance-text p {
    color: var(--gray-600);
    line-height: 1.7;
    margin: 0;
}

/* レスポンシブデザインの更新 */
@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-title {
        font-size: 2rem;
    }
    
    .emotion-flow {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
    
    .journey-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .emotion-categories {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .emotion-balance-note {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .single-category {
        padding: 2rem 1.5rem;
    }
}

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

:root {
    /* カラーパレット */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* 感情カラー */
    --joy-color: #fbbf24;
    --anger-color: #ef4444;
    --sadness-color: #3b82f6;
    --pleasure-color: #10b981;
    --energy-color: #f59e0b;
    --relaxation-color: #06b6d4;
    --fatigue-color: #6b7280;
    --tension-color: #dc2626;
    
    /* グレースケール */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* タイポグラフィ */
    --font-primary: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* シャドウ */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* その他 */
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-out;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--gray-800);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ナビゲーション */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
}

.nav-brand:hover {
    text-decoration: none;
}

.nav-brand .app-logo {
    margin-top: 3px;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    flex-shrink: 0;
    background-image: url('../images/logo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}



.nav-brand .brand-text {
    font-size: 1.75rem;
    font-weight: 800;
    font-family: var(--font-secondary);
    letter-spacing: -0.02em;
    filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.1));
}

.j-letter {
    color: #007AFF; /* iOSの.blue色 */
}

.other-letters {
    color: #8E8E93; /* iOSの.secondary色（ライトモード） */
}

.plus {
    color: #8E8E93; /* iOSの.secondary色（ライトモード） */
    font-weight: 900; /* .heavy に対応 */
    font-size: 1.1em; /* +を少し大きく */
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center; /* 垂直方向の中央揃えを追加 */
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ヒーローセクション */
.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;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    font-family: var(--font-secondary);
}

.title-main {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.title-sub {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    opacity: 1;
    animation: fadeInUp 0.8s ease-out 0.9s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    opacity: 1;
    animation: fadeInUp 0.8s ease-out 1.2s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::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: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #10b981, #06b6d4);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ヒーロービジュアル */
.hero-visual {
    display: flex;
    justify-content: center;
    opacity: 1;
    animation: fadeInUp 0.8s ease-out 1.5s backwards;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
    border-radius: 2.5rem;
    padding: 0.5rem;
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--gray-50), var(--white));
    border-radius: 2rem;
    padding: 0;  /* パディングを削除 */
    position: relative;
    overflow: hidden;
}

.emotion-circles {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.emotion-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    animation: float 3s ease-in-out infinite;
}

.emotion-circle:nth-child(1) { animation-delay: 0s; }
.emotion-circle:nth-child(2) { animation-delay: 0.5s; }
.emotion-circle:nth-child(3) { animation-delay: 1s; }
.emotion-circle:nth-child(4) { animation-delay: 1.5s; }

.emotion-circle.joy { background: linear-gradient(135deg, var(--joy-color), #fde047); }
.emotion-circle.anger { background: linear-gradient(135deg, var(--anger-color), #fca5a5); }
.emotion-circle.sadness { background: linear-gradient(135deg, var(--sadness-color), #93c5fd); }
.emotion-circle.pleasure { background: linear-gradient(135deg, var(--pleasure-color), #6ee7b7); }

.state-indicators {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.state-bar {
    height: 12px;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    animation: pulse 2s ease-in-out infinite;
}

.state-bar:nth-child(1) { animation-delay: 0s; }
.state-bar:nth-child(2) { animation-delay: 0.3s; }
.state-bar:nth-child(3) { animation-delay: 0.6s; }
.state-bar:nth-child(4) { animation-delay: 0.9s; }

.state-bar.energy { background: linear-gradient(90deg, var(--energy-color), #fde047); }
.state-bar.relaxation { background: linear-gradient(90deg, var(--relaxation-color), #67e8f9); }
.state-bar.fatigue { background: linear-gradient(90deg, var(--fatigue-color), #9ca3af); }
.state-bar.tension { background: linear-gradient(90deg, var(--tension-color), #fca5a5); }

/* セクション共通スタイル */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-family: var(--font-secondary);
}

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

/* 機能セクション */
.features {
    padding: 6rem 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.8;
}

/* 感情ガイドセクション */
.emotion-guide {
    padding: 6rem 0;
    background: var(--white);
}

.emotion-categories {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.emotion-category {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.category-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2rem;
    text-align: center;
}

.category-subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--gray-500);
    font-family: var(--font-secondary);
}

.emotion-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.emotion-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.emotion-item:hover {
    background: var(--gray-50);
    transform: translateX(5px);
}

.emotion-emoji {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
}

.emotion-item.joy .emotion-emoji { background: linear-gradient(135deg, var(--joy-color), #fde047); }
.emotion-item.anger .emotion-emoji { background: linear-gradient(135deg, var(--anger-color), #fca5a5); }
.emotion-item.sadness .emotion-emoji { background: linear-gradient(135deg, var(--sadness-color), #93c5fd); }
.emotion-item.pleasure .emotion-emoji { background: linear-gradient(135deg, var(--pleasure-color), #6ee7b7); }
.emotion-item.energy .emotion-emoji { background: linear-gradient(135deg, var(--energy-color), #fde047); }
.emotion-item.relaxation .emotion-emoji { background: linear-gradient(135deg, var(--relaxation-color), #67e8f9); }
.emotion-item.fatigue .emotion-emoji { background: linear-gradient(135deg, var(--fatigue-color), #9ca3af); }
.emotion-item.tension .emotion-emoji { background: linear-gradient(135deg, var(--tension-color), #fca5a5); }

.emotion-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.emotion-info p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* スクリーンショットセクション */
.screenshots {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.screenshots .section-title,
.screenshots .section-subtitle {
    color: var(--white);
}

.screenshots-carousel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-top: 4rem;
}

.screenshot-item {
    text-align: center;
    transition: var(--transition);
}

.screenshot-phone {
    width: 280px;
    height: 560px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
    border-radius: 2rem;
    padding: 0.5rem;
    box-shadow: var(--shadow-xl);
    transition: var(--transition);
}

.screenshot-item:hover .screenshot-phone {
    transform: translateY(-10px) scale(1.05);
}

.screenshot-content {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 1.5rem;
    overflow: hidden;
    position: relative;
}

.mock-screen {
    padding: 1rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.mock-header {
    font-weight: 600;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--gray-800);
    font-size: 0.875rem;
}

.mock-emotion-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.mock-emotion {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    margin: 0 auto;
}

.mock-states {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mock-state-bar {
    height: 8px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
}

.mock-chart {
    position: relative;
    height: 120px;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.mock-chart-line {
    position: absolute;
    top: 20px;
    left: 10px;
    right: 10px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.mock-chart-bars {
    position: absolute;
    bottom: 20px;
    left: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
    align-items: end;
}

.mock-bar {
    flex: 1;
    background: var(--secondary-color);
    border-radius: 2px 2px 0 0;
}

.mock-bar:nth-child(1) { height: 20px; }
.mock-bar:nth-child(2) { height: 35px; }
.mock-bar:nth-child(3) { height: 15px; }
.mock-bar:nth-child(4) { height: 40px; }

.mock-legend {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mock-legend-item {
    font-size: 0.75rem;
    color: var(--gray-600);
}

.mock-calendar-header {
    text-align: center;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--gray-800);
}

.mock-calendar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.mock-date {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    background: var(--gray-100);
    color: var(--gray-600);
    margin: 0 auto;
}

.mock-date.active {
    background: var(--primary-color);
    color: var(--white);
}

.mock-record-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mock-record {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem;
    background: var(--gray-50);
    border-radius: var(--border-radius-sm);
}

.mock-time {
    font-size: 0.75rem;
    color: var(--gray-600);
    font-weight: 500;
}

.mock-emotions {
    font-size: 1rem;
}

.screenshot-info h3 {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.screenshot-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

/* ダウンロードセクション */
.download {
    padding: 6rem 0;
    background: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-family: var(--font-secondary);
}

.download-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.download-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.download-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-700);
}

.download-feature i {
    color: var(--success-color);
    font-size: 1.125rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.app-store-button {
    display: block;
    transition: var(--transition);
}

.app-store-button:hover {
    transform: scale(1.05);
}

.app-store-button img {
    height: 60px;
    width: auto;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--gray-500);
}

.qr-placeholder i {
    font-size: 2rem;
}

.qr-placeholder p {
    font-size: 0.75rem;
    margin: 0;
}

/* フッター */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand .app-logo {
    margin-top: 3px;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    flex-shrink: 0;
    background-image: url('../images/logo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.footer-brand .brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-secondary);
    letter-spacing: -0.02em;
}

.footer-brand .j-letter {
    color: #3b82f6; /* アプリと同じ青色 */
}

.footer-brand .other-letters {
    color: var(--gray-400); /* フッター用のライトグレー */
}

.footer-brand .plus {
    color: var(--gray-400); /* フッター用のライトグレー */
    font-weight: 700;
}

.footer-brand p {
    color: var(--gray-400);
    margin-top: 0.5rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 1rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* AOS（Animate On Scroll）スタイル */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translate(0);
}

/* ストーリーページ専用スタイル */
.story-main {
    padding-top: 70px;
}

.story-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 4rem 0;
    color: var(--white);
    text-align: center;
}

.story-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 1rem;
    font-family: var(--font-secondary);
}

.story-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
}

.story-content {
    padding: 4rem 0;
    background: var(--white);
}

.story-article {
    max-width: 800px;
    margin: 0 auto;
}

.story-section {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
}

.story-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-top: 0.5rem;
}

.story-text {
    flex: 1;
}

.story-text h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-family: var(--font-secondary);
}

.story-text p {
    line-height: 1.8;
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.story-quote {
    background: var(--gray-50);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.story-quote p {
    margin-bottom: 0.75rem;
    font-style: italic;
    color: var(--gray-600);
}

.story-quote p:last-child {
    margin-bottom: 0;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    margin: 1.5rem 0;
}

.highlight-box p {
    margin: 0;
    color: var(--gray-800);
    font-weight: 500;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.step-item:hover {
    background: var(--gray-100);
    transform: translateX(5px);
}

.step-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

.step-item p {
    margin: 0;
    color: var(--gray-700);
}

.important-message {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    margin: 2rem 0;
}

.important-message h3 {
    color: var(--success-color);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.important-message p {
    margin-bottom: 0.75rem;
    color: var(--gray-700);
}

.important-message p:last-child {
    margin-bottom: 0;
}

.final-section {
    border-left-color: var(--success-color);
}

.final-message {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--gray-800);
    margin-bottom: 2rem;
}

.cta-section {
    text-align: center;
    margin-top: 2rem;
}

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

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

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

.nav-brand a {
    text-decoration: none;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .story-section {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .story-icon {
        align-self: flex-start;
    }
    
    .story-text h2 {
        font-size: 1.5rem;
    }
    
    .steps-container {
        gap: 0.75rem;
    }
    
    .step-item {
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 70px;
    }
    
    .hero-title {
        font-size: 1.6rem;
        line-height: 1.2;
        margin-top: 1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.875rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .emotion-category {
        padding: 2rem 1.5rem;
    }

    .phone-mockup {
        width: 180px;
        height: 360px;
    }

    .screenshot-phone {
        width: 200px;
        height: 400px;
    }

    .about-section {
        padding: 4rem 0;
    }
    
    .journey-section {
        padding: 4rem 0;
    }
    
    .about-title {
        font-size: 1.75rem;
    }
    
    .key-message {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .message-content {
        padding: 1.5rem;
    }
    
    .message-content p {
        padding: 0 1rem;
        font-size: 1rem;
    }
    
    .flow-circle {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .balance-circle {
        width: 100px;
        height: 100px;
    }
}



@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: start;
        padding-top: 2rem;
        transition: var(--transition);
    }

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

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .phone-mockup {
        width: 200px;
        height: 400px;
        transform: none;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .emotion-categories {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .screenshots-carousel {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .screenshot-phone {
        width: 250px;
        height: 500px;
    }

    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .download-title {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}



/* 言語切替ボタンのスタイル */
.language-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    height: 40px; /* 高さを固定してナビメニューと同じ高さに */
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    display: flex;
    align-items: center; /* ナビリンクも中央揃えに */
    height: 40px; /* ナビリンクの高さを統一 */
}

.language-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.language-link:hover {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

.language-link.active {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
    font-weight: 600;
}

.language-separator {
    color: var(--gray-400);
    font-weight: 300;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .language-toggle {
        order: -1; /* モバイルでは最上部に表示 */
        margin-bottom: 1rem;
    }
}