:root {
    /* Color Palette - Nature inspired, Premium feel */
    --color-bg: #F9FAF8;
    --color-text-main: #2C3E50;
    --color-text-sub: #5D6D7E;
    --color-primary: #2E7D32;
    /* Green */
    --color-primary-light: #4CAF50;
    --color-accent: #81C784;
    --color-white: #FFFFFF;
    --color-glass: rgba(255, 255, 255, 0.8);
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-display: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

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

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

/* Typography Utilities */
h1,
h2,
h3 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

.highlight {
    color: var(--color-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-main);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.3);
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(46, 125, 50, 0.4);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--color-text-sub);
    color: var(--color-text-sub);
}

.btn-secondary:hover {
    background-color: var(--color-text-sub);
    color: var(--color-white);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 10% 20%, rgba(46, 125, 50, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(129, 199, 132, 0.2) 0%, transparent 40%);
}

.hero-content {
    background: var(--color-glass);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px var(--color-shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    max-width: 800px;
    width: 100%;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-main);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-sub);
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-sub);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Diagnosis Section */
.diagnosis-section {
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 var(--spacing-sm);
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background-color: #E0E0E0;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    width: 0%;
    transition: width 0.5s ease;
}

.question-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px var(--color-shadow);
    text-align: center;
    animation: slideIn 0.5s ease-out;
}

.question-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-main);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.option-btn {
    background: var(--color-bg);
    border: 2px solid transparent;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    color: var(--color-text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.option-btn:hover {
    background: var(--color-white);
    border-color: var(--color-primary-light);
    transform: translateY(-4px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.option-btn.selected {
    background: var(--color-primary-light);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-sm);
}

/* Result Section */
.result-section {
    max-width: 900px;
    margin: 4rem auto;
    padding: 0 var(--spacing-sm);
    animation: fadeInUp 0.6s ease-out;
}

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

.result-header h2 {
    font-size: 2rem;
    color: var(--color-text-main);
}

.plant-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 48px var(--color-shadow);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.plant-card:hover {
    transform: translateY(-8px);
}

.plant-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
}

.plant-info {
    padding: var(--spacing-lg);
}

.plant-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.plant-scientific {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.plant-description {
    line-height: 1.8;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-md);
}

.plant-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

.care-level {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.care-level-label {
    font-weight: 600;
    color: var(--color-text-main);
}

.care-dots {
    display: flex;
    gap: 4px;
}

.care-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #E0E0E0;
}

.care-dot.filled {
    background: var(--color-primary);
}

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

/* Purchase Section */
.purchase-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-bg);
}

.purchase-title {
    font-size: 1.3rem;
    width: 100%;
    height: 6px;
    background-color: #E0E0E0;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    width: 0%;
    transition: width 0.5s ease;
}

.question-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px var(--color-shadow);
    text-align: center;
    animation: slideIn 0.5s ease-out;
}

.question-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-main);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.option-btn {
    background: var(--color-bg);
    border: 2px solid transparent;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    color: var(--color-text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.option-btn:hover {
    background: var(--color-white);
    border-color: var(--color-primary-light);
    transform: translateY(-4px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.option-btn.selected {
    background: var(--color-primary-light);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    padding: 0 var(--spacing-sm);
}

/* Result Section */
.result-section {
    max-width: 900px;
    margin: 4rem auto;
    padding: 0 var(--spacing-sm);
    animation: fadeInUp 0.6s ease-out;
}

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

.result-header h2 {
    font-size: 2rem;
    color: var(--color-text-main);
}

.plant-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 48px var(--color-shadow);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.plant-card:hover {
    transform: translateY(-8px);
}

.plant-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
}

.plant-info {
    padding: var(--spacing-lg);
}

.plant-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    text-align: center;
}

.plant-scientific {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    font-style: italic;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.plant-description {
    line-height: 1.8;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.plant-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    justify-content: center;
}

.tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

.care-level {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.care-level-label {
    font-weight: 600;
    color: var(--color-text-main);
}

.care-dots {
    display: flex;
    gap: 4px;
}

.care-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #E0E0E0;
}

.care-dot.filled {
    background: var(--color-primary);
}

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

/* Purchase Section */
.purchase-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-bg);
}

.purchase-title {
    font-size: 1.3rem;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.purchase-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.purchase-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.purchase-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.amazon-btn {
    background: linear-gradient(135deg, #FF9900 0%, #FFB84D 100%);
    color: #000000;
}

.amazon-btn:hover {
    background: linear-gradient(135deg, #FFB84D 0%, #FF9900 100%);
}

.rakuten-btn {
    background: linear-gradient(135deg, #BF0000 0%, #E60012 100%);
    color: var(--color-white);
}

.rakuten-btn:hover {
    background: linear-gradient(135deg, #E60012 0%, #BF0000 100%);
}

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

.affiliate-notice {
    font-size: 0.75rem;
    color: var(--color-text-sub);
}

.result-header h2 {
    font-size: 2rem;
    color: var(--color-text-main);
}

.plant-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 48px var(--color-shadow);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.plant-card:hover {
    transform: translateY(-8px);
}

.plant-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
}

.plant-info {
    padding: var(--spacing-lg);
}

.plant-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.plant-scientific {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.plant-description {
    line-height: 1.8;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-md);
}

.plant-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

.care-level {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.care-level-label {
    font-weight: 600;
    color: var(--color-text-main);
}

.care-dots {
    display: flex;
    gap: 4px;
}

.care-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #E0E0E0;
}

.care-dot.filled {
    background: var(--color-primary);
}

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

/* Purchase Section */
.purchase-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-bg);
}

.purchase-title {
    font-size: 1.3rem;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.purchase-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.purchase-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.purchase-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.amazon-btn {
    background: linear-gradient(135deg, #FF9900 0%, #FFB84D 100%);
    color: #000000;
}

.amazon-btn:hover {
    background: linear-gradient(135deg, #FFB84D 0%, #FF9900 100%);
}

.rakuten-btn {
    background: linear-gradient(135deg, #BF0000 0%, #E60012 100%);
    color: var(--color-white);
}

.rakuten-btn:hover {
    background: linear-gradient(135deg, #E60012 0%, #BF0000 100%);
}

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

.affiliate-notice {
    font-size: 0.75rem;
    color: var(--color-text-sub);
    text-align: center;
    font-style: italic;
    margin: 0;
}

/* Care Details Section - SEO強化用 */
.care-details-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--color-bg);
}

.care-details-title {
    font-size: 1.8rem;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    text-align: center;
}

.care-detail-item {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.care-detail-heading {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.care-level-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.care-level-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
}

.care-frequency-label,
.care-sunlight-label {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.care-detail-description {
    line-height: 1.8;
    color: var(--color-text-main);
    margin-top: var(--spacing-xs);
    font-size: 1rem;
}

/* Share Section */
.share-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--color-text-sub);
}

.share-title {
    font-size: 1.1rem;
    color: var(--color-text-main);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

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

.share-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-full);
    text-decoration: none !important;
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-white) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: none;
    line-height: 1;
    position: relative;
    overflow: hidden;
}

.share-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

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

.share-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.share-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.twitter-btn {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
}

.twitter-btn:hover {
    background: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
}

.line-btn {
    background: linear-gradient(135deg, #06C755 0%, #00B900 100%);
}

.line-btn:hover {
    background: linear-gradient(135deg, #00B900 0%, #06C755 100%);
}

.facebook-btn {
    background: linear-gradient(135deg, #1877F2 0%, #0d5dbf 100%);
}

.facebook-btn:hover {
    background: linear-gradient(135deg, #0d5dbf 0%, #1877F2 100%);
}

.btn-icon {
    font-size: 1.3rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* SEO Content Section */
.seo-content-section {
    color: var(--color-text-main);
    line-height: 1.8;
}

.seo-content-section h2 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.seo-content-section h3 {
    font-size: 1.4rem;
    color: var(--color-text-main);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.seo-content-section p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-main);
}

.seo-content-section ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

.seo-content-section li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-main);
}

.seo-content-section strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Footer */
.site-footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-bg);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) var(--spacing-sm);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

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

.footer-title {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.footer-text {
    color: var(--color-text-main);
    line-height: 1.8;
    font-size: 0.95rem;
}

.footer-link {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-bg);
    text-align: center;
}

.footer-copyright {
    color: var(--color-text-sub);
    font-size: 0.85rem;
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-content {
        padding: var(--spacing-md);
    }

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

    .plant-name {
        font-size: 1.6rem;
    }

    .plant-image {
        height: 200px;
    }

    .purchase-buttons,
    .share-buttons {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .purchase-buttons-top {
        flex-direction: column;
    }

    .share-btn-top {
        max-width: 100%;
    }
}

/* 画像直下の植物名表示 */
.plant-name-top {
    padding: var(--spacing-md);
    background: var(--color-white);
    text-align: center;
    border-bottom: 1px solid var(--color-bg);
}

.plant-name-main {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.plant-scientific-top {
    font-size: 0.9rem;
    color: var(--color-text-sub);
    font-style: italic;
    margin: 0;
}

/* メイン画像直下の購入ボタン（目立つ配置） */
.purchase-buttons-top {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-bg);
}

.share-button-top {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-white);
    border-bottom: 2px solid var(--color-bg);
    display: flex;
    justify-content: center;
}

.share-btn-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
    color: var(--color-white) !important;
    width: 100%;
    max-width: 300px;
}

.share-btn-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
}

/* ================================================
   モバイル対応（レスポンシブデザイン）
   ================================================ */

/* タブレット以下 */
@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }

    body {
        font-size: 14px;
    }

    /* ヒーローセクション */
    .hero-section {
        padding: var(--spacing-lg);
        min-height: 100vh;
    }

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

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-description {
        font-size: 0.9rem;
        padding: 0 var(--spacing-sm);
    }

    .start-btn {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }

    /* 質問セクション */
    .diagnosis-section {
        padding: var(--spacing-md);
    }

    .question-card {
        padding: var(--spacing-md);
    }

    .question-title {
        font-size: 1.3rem;
        margin-bottom: var(--spacing-md);
    }

    .options-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .option-btn {
        padding: var(--spacing-md);
        font-size: 0.95rem;
    }

    .option-btn span:first-child {
        font-size: 1.5rem !important;
    }

    /* 結果セクション */
    .result-section {
        padding: var(--spacing-md);
    }

    .result-header h2 {
        font-size: 1.5rem;
    }

    .plant-card {
        margin-top: var(--spacing-md);
    }

    .plant-info {
        padding: var(--spacing-md);
    }

    .plant-name {
        font-size: 1.5rem;
    }

    .plant-scientific {
        font-size: 0.85rem;
    }

    .plant-description {
        font-size: 0.9rem;
    }

    .plant-tags {
        gap: 0.4rem;
    }

    .tag {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }

    /* ケア詳細セクション */
    .care-details-section {
        padding: var(--spacing-md);
    }

    .care-details-title {
        font-size: 1.3rem;
    }

    .care-detail-heading {
        font-size: 1rem;
    }

    .care-detail-description {
        font-size: 0.85rem;
    }

    /* 購入ボタン */
    .purchase-section {
        padding: var(--spacing-md);
    }

    .purchase-buttons,
    .purchase-buttons-top {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .purchase-btn {
        width: 100%;
        padding: 0.9rem;
        font-size: 0.95rem;
    }

    .affiliate-notice {
        font-size: 0.75rem;
    }

    /* シェアボタン */
    .share-section {
        padding: var(--spacing-md);
    }

    .share-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .share-btn {
        width: 100%;
        padding: 0.9rem;
        font-size: 0.95rem;
    }

    .share-title,
    .purchase-title {
        font-size: 1.1rem;
    }

    /* プログレスバー */
    .progress-container {
        margin: var(--spacing-sm) 0;
    }

    /* リトライボタン */
    .retry-btn {
        padding: 0.9rem 2rem;
        font-size: 0.95rem;
    }
}

/* スマートフォン（小） */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .hero-description {
        font-size: 0.85rem;
    }

    .question-title {
        font-size: 1.1rem;
    }

    .plant-name {
        font-size: 1.3rem;
    }

    .care-details-title {
        font-size: 1.1rem;
    }

    .option-btn {
        padding: var(--spacing-sm);
    }

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

    .purchase-section,
    .share-section,
    .care-details-section {
        padding: var(--spacing-sm);
    }
}

/* 横向き対応 */
@media (max-height: 600px) and (orientation: landscape) {
    .hero-section {
        min-height: auto;
        padding: var(--spacing-md);
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-description {
        display: none;
    }

    .question-card {
        padding: var(--spacing-sm);
    }

    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Coffee Donation Button Styling */
.coffee-btn {
    background: linear-gradient(135deg, #FFDD00 0%, #FFC700 100%);
    color: #000;
    font-weight: bold;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 221, 0, 0.3);
}

.coffee-btn:hover {
    background: linear-gradient(135deg, #FFC700 0%, #FFDD00 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 221, 0, 0.4);
}

/* Google Search Button Styling */
.google-btn {
    background: linear-gradient(135deg, #4285F4 0%, #34A853 50%, #FBBC05 75%, #EA4335 100%);
    color: white;
    font-weight: bold;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
}


.google-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(66, 133, 244, 0.4);
}


/* =========================================
   History (My Plants) Styles
   ========================================= */

/* History Button (Floating or Footer) */
.history-btn-container {
    text-align: center;
    margin-top: 1rem;
}

.history-trigger-btn {
    background: white;
    border: 2px solid #4CAF50;
    color: #4CAF50;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.history-trigger-btn:hover {
    background: #e8f5e9;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #2E7D32;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

/* History List */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    border: 1px solid #eee;
    border-radius: 8px;
    transition: background 0.2s;
}

.history-item:hover {
    background: #f9f9f9;
}

.history-thumb {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.history-info {
    flex: 1;
}

.history-name {
    font-weight: bold;
    color: #333;
}

.history-date {
    font-size: 0.8rem;
    color: #888;
}

.history-delete {
    color: #ff5252;
    cursor: pointer;
    padding: 0.25rem;
    font-size: 0.9rem;
}

/* =========================================
   Annual Care Calendar Styles
   ========================================= */
.calendar-section {
    margin-top: 2rem;
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid #e9ecef;
}

.calendar-title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #2c3e50;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);

    /* PC: 2 rows of 6 months */

    gap: 8px;
    margin-bottom: 1rem;
}

.calendar-month {
    background: white;
    border-radius: 8px;
    padding: 0.5rem;
    text-align: center;
    border: 1px solid #dee2e6;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 80px;
}

.month-label {
    font-size: 0.9rem;
    font-weight: bold;
    color: #495057;
    margin-bottom: 0.25rem;
    border-bottom: 1px solid #f1f3f5;
    width: 100%;
    padding-bottom: 2px;
}

.care-icons {
    display: flex;
    gap: 4px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: auto;
}

.care-icon {
    font-size: 1.2rem;
    line-height: 1;
}

/* Tooltips or simple visual cues */
.care-icon.water {
    filter: drop-shadow(0 2px 2px rgba(33, 150, 243, 0.2));
}

.care-icon.water-dry {
    opacity: 0.6;
    transform: scale(0.9);
}

.care-icon.fertilizer {
    filter: drop-shadow(0 2px 2px rgba(255, 152, 0, 0.2));
}

.care-icon.repot {
    filter: drop-shadow(0 2px 2px rgba(121, 85, 72, 0.2));
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 1rem;
    padding-top: 0.5rem;
    border-top: 1px solid #e9ecef;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .calendar-grid {
        grid-template-columns: repeat(4, 1fr);
        /* Mobile: 3 rows of 4 months */
    }
}

/* Center align detail items as requested */
.detail-item {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 1rem 0;
    font-size: 1.1rem;
}

.detail-label {
    color: #666;
    font-weight: bold;
}

.detail-value {
    color: #2E7D32;
    font-weight: bold;
}

/* =========================================
   Shareable Result Card Redesign
   ========================================= */
.result-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 0 auto 2rem auto;
    max-width: 500px;
    /* Card width limit */
    transition: transform 0.3s ease;
}

.result-card:hover {
    transform: translateY(-5px);
}

.result-card-header {
    height: 220px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    padding-top: 1rem;
}

.result-card-icon {
    font-size: 7rem;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.15));
}

.result-card-body {
    padding: 2.5rem 2rem;
    text-align: center;
}

.result-plant-name {
    font-size: 2.2rem;
    color: #2E7D32;
    margin-bottom: 0.5rem;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
}

.result-plant-scientific {
    font-size: 1.1rem;
    color: #888;
    font-style: italic;
    margin-bottom: 2rem;
    font-family: 'Inter', sans-serif;
}

.result-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.result-tag {
    background: #E8F5E9;
    color: #2E7D32;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    /* Subtle shadow for pills */
}

.result-description {
    color: #555;
    line-height: 1.8;
    margin-bottom: 2rem;
    font-size: 1.05rem;
    text-align: justify;
    text-align-last: center;
}

/* Updated Details Grid within Card */
.care-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 2rem;
}

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

.care-info-label {
    font-size: 0.8rem;
    color: #888;
    font-weight: bold;
}

.care-info-value {
    font-size: 1rem;
    color: #333;
    font-weight: bold;
}