/* ========================================
   基本設定とリセット
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 淡く明るいビューティー系カラーパレット - 視認性向上 */
    --primary-color: #ff99cc;
    --primary-dark: #ff80bf;
    --primary-light: #ffd0e8;
    --secondary-color: #c78ed4;
    --accent-color: #ffb3d9;
    
    /* ニュートラルカラー - 濃くして可読性向上 */
    --bg-color: #fffbfd;
    --white: #ffffff;
    --text-dark: #2d2d2d;
    --text-gray: #555555;
    --text-light: #777777;
    --border-color: #ffe5f3;
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #ff99cc 0%, #c78ed4 100%);
    --gradient-light: linear-gradient(135deg, #ffe8f5 0%, #fdf0f8 100%);
    --gradient-hero: linear-gradient(135deg, #ffb3d9 0%, #ddb8e8 100%);
    
    /* シャドウ */
    --shadow-sm: 0 2px 12px rgba(255, 153, 204, 0.2);
    --shadow-md: 0 4px 20px rgba(255, 153, 204, 0.25);
    --shadow-lg: 0 8px 35px rgba(255, 153, 204, 0.3);
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-display: 'Playfair Display', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* ボーダー半径 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* トランジション */
    --transition: all 0.3s ease;
}

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

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

/* ========================================
   ヘッダー
   ======================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.logo .for-women {
    color: var(--primary-color);
    font-style: italic;
}

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

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: var(--gradient-light);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box input {
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    outline: none;
    font-family: var(--font-primary);
    transition: var(--transition);
    width: 250px;
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(212, 101, 140, 0.1);
}

.search-box i {
    position: absolute;
    right: 1rem;
    color: var(--text-light);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    color: var(--white);
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
}

.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: -200px;
    right: -100px;
    animation: float 20s infinite ease-in-out;
}

.circle-2 {
    width: 300px;
    height: 300px;
    bottom: -150px;
    left: -100px;
    animation: float 15s infinite ease-in-out 5s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: 10%;
    animation: float 18s infinite ease-in-out 3s;
}

/* ========================================
   ボタン
   ======================================== */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-family: var(--font-primary);
}

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

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

.btn-secondary {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

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

/* ========================================
   セクション共通
   ======================================== */
.categories,
.featured,
.about,
.newsletter,
.our-picks {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-family: var(--font-display);
    font-size: 3rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
}

/* ========================================
   カテゴリーセクション
   ======================================== */
.categories {
    background: var(--bg-color);
}

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

.category-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    background: var(--gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.category-card p {
    color: var(--text-gray);
    margin-bottom: var(--spacing-sm);
}

.item-count {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--gradient-light);
    color: var(--primary-color);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
}

/* ========================================
   おすすめ商品セクション
   ======================================== */
.featured {
    background: var(--white);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--white);
    border-radius: var(--radius-lg);
    color: var(--text-gray);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-primary);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: transparent;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    font-weight: 700;
    z-index: 10;
    text-transform: uppercase;
}

.product-badge.trending {
    background: var(--secondary-color);
}

.product-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--gradient-light);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder i {
    font-size: 4rem;
    opacity: 0.3;
}

.beauty-bg {
    background: linear-gradient(135deg, #fff0f8 0%, #fef4fa 100%);
}

.beauty-bg i {
    color: var(--primary-color);
}

.fashion-bg {
    background: linear-gradient(135deg, #f0f4ff 0%, #faf0ff 100%);
}

.fashion-bg i {
    color: #b088f9;
}

.wellness-bg {
    background: linear-gradient(135deg, #fff0f5 0%, #fff5f8 100%);
}

.wellness-bg i {
    color: #ff9ec8;
}

.home-bg {
    background: linear-gradient(135deg, #faf0ff 0%, #f5f0ff 100%);
}

.home-bg i {
    color: #c4a5ff;
}

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

.product-category {
    display: inline-block;
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.product-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.product-description {
    color: var(--text-gray);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: var(--spacing-sm);
}

.product-rating i {
    color: #ffc107;
    font-size: 0.9rem;
}

.product-rating span {
    margin-left: 0.5rem;
    color: var(--text-gray);
    font-size: 0.9rem;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* ========================================
   マイ比較ネットが選んだおすすめセクション
   ======================================== */
.our-picks {
    background: var(--white);
    padding: var(--spacing-xl) 0;
}

.picks-filter-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.picks-filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--white);
    border-radius: var(--radius-lg);
    color: var(--text-gray);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-primary);
}

.picks-filter-btn:hover,
.picks-filter-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
}

.picks-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.load-more-container {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.load-more-container .btn-primary {
    font-size: 1.1rem;
    padding: 1.2rem 3rem;
}

/* ========================================
   Aboutセクション
   ======================================== */
.about {
    background: var(--gradient-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-text h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.about-features {
    margin-top: var(--spacing-md);
}

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

.feature-item i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.feature-item span {
    color: var(--text-dark);
    font-weight: 500;
    font-size: 1.1rem;
}

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

.stat-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--font-display);
}

.stat-label {
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-top: var(--spacing-xs);
}

/* ========================================
   おすすめコラムセクション
   ======================================== */
.columns-section {
    background: var(--bg-color);
    padding: var(--spacing-xl) 0;
}

.columns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.column-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
}

.column-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.column-image-wrapper {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
    background: var(--gradient-light);
}

.column-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.column-category-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    z-index: 10;
}

.column-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.column-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.column-excerpt {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.column-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-light);
}

.column-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.column-author i {
    color: var(--primary-color);
}

.column-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.column-date,
.column-read-time {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.column-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
}

.column-tag {
    padding: 0.3rem 0.8rem;
    background: var(--gradient-light);
    color: var(--primary-color);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ========================================
   ニュースレターセクション
   ======================================== */
.newsletter {
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.newsletter-content h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.newsletter-content p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 600px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
}

.newsletter-form input {
    flex: 1;
    min-width: 250px;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
}

.newsletter-form input:focus {
    outline: 3px solid rgba(255, 255, 255, 0.5);
}

/* ========================================
   フッター
   ======================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-light);
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    opacity: 1;
    color: var(--primary-light);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
    text-decoration: none;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0.8;
}

.contact-info i {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* ========================================
   LINE登録ボタン（固定配置）
   ======================================== */
.line-float-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    animation: slideInFromRight 0.5s ease-out;
}

.line-button {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #06C755;
    color: white;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(6, 199, 85, 0.4);
    transition: all 0.3s ease;
    position: relative;
}

.line-button:hover {
    background: #05b04b;
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(6, 199, 85, 0.5);
}

.line-icon {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.line-icon i {
    font-size: 24px;
    color: #06C755;
}

.line-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.line-label {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.9;
}

.line-action {
    font-size: 1rem;
    font-weight: 700;
}

.line-close-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    background: var(--text-dark);
    color: white;
    border: 2px solid white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
    opacity: 0;
}

.line-float-button:hover .line-close-btn {
    opacity: 1;
}

.line-close-btn:hover {
    background: #ff4444;
    transform: rotate(90deg);
}

.line-float-button.hidden {
    display: none;
}

/* ========================================
   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) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes slideOutToRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* ========================================
   レスポンシブデザイン
   ======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .search-box input {
        width: 200px;
    }
    
    .hero {
        min-height: 500px;
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    /* コラムセクション - タブレット */
    .columns-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: var(--spacing-md);
    }
    
    .newsletter-form input {
        width: 100%;
    }
    
    /* LINEボタン - タブレット */
    .line-float-button {
        bottom: 20px;
        right: 20px;
    }
    
    .line-button {
        padding: 10px 16px;
    }
    
    .line-icon {
        width: 36px;
        height: 36px;
    }
    
    .line-icon i {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .search-box {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-btn {
        width: 100%;
    }
    
    /* コラムセクション - モバイル */
    .columns-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .column-title {
        font-size: 1.1rem;
    }
    
    .column-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    /* LINEボタン - モバイル */
    .line-float-button {
        bottom: 15px;
        right: 15px;
    }
    
    .line-text {
        display: none;
    }
    
    .line-button {
        padding: 12px;
        border-radius: 50%;
        gap: 0;
    }
    
    .line-icon {
        width: 50px;
        height: 50px;
    }
    
    .line-icon i {
        font-size: 28px;
    }
    
    .line-button {
        animation: pulse 2s infinite;
    }
}

/* ========================================
   ユーティリティクラス
   ======================================== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeInUp 0.6s ease;
}

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }