/* リセットとベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #000;
    background-color: #fff;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー・ナビゲーション */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: #000;
    font-weight: 400;
    font-size: 16px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #D4AF37;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #D4AF37;
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #000;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero セクション */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    text-align: center;
    z-index: 2;
    color: #000;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    font-weight: 300;
}

.cta-button {
    background: linear-gradient(45deg, #D4AF37, #FFD700);
    color: #000;
    border: none;
    padding: 15px 40px;
    font-size: 18px;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.4);
}

/* セクションタイトル */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 60px;
    color: #000;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(45deg, #D4AF37, #FFD700);
}

/* 瀑布流セクション */
.masonry-section {
    padding: 100px 0;
    background-color: #fff;
}

.masonry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.masonry-item {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.masonry-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.masonry-item img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.masonry-item:hover img {
    transform: scale(1.05);
}

.item-info {
    padding: 20px;
}

.item-info h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 10px;
    color: #000;
}

.price {
    font-size: 1.1rem;
    font-weight: 700;
    color: #D4AF37;
}

.load-more {
    display: block;
    margin: 0 auto;
    background: linear-gradient(45deg, #D4AF37, #FFD700);
    color: #000;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.load-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
}

/* おすすめ商品セクション */
.recommendations {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.rec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.rec-column {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.rec-title {
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: #000;
    position: relative;
}

.rec-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: #D4AF37;
}

.rec-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.rec-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: 10px;
    transition: background-color 0.3s ease;
}

.rec-item:hover {
    background-color: #f5f5f5;
}

.rec-item img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
}

.rec-info h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 5px;
    color: #000;
}

.rec-price {
    font-weight: 600;
    color: #D4AF37;
    margin: 0;
}

.rec-price.original {
    text-decoration: line-through;
    color: #888;
    font-size: 0.9rem;
}

.rec-price.sale {
    color: #D4AF37;
    font-size: 1.1rem;
}

/* フッター */
.footer {
    background-color: #000;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.contact-info h3,
.line-qr h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #D4AF37;
}

.contact-info p {
    margin-bottom: 10px;
    font-size: 0.95rem;
}

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

.qr-code img {
    width: 120px;
    height: 120px;
    margin-bottom: 10px;
    border-radius: 10px;
}

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

.auto-redirect p {
    font-size: 1rem;
    margin-bottom: 15px;
}

.countdown {
    font-size: 2rem;
    font-weight: 700;
    color: #D4AF37;
    background: rgba(212, 175, 55, 0.1);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    border: 2px solid #D4AF37;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #888;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        backdrop-filter: blur(10px);
        padding: 20px 0;
        gap: 20px;
    }

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

    .hamburger {
        display: flex;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

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

    .masonry-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .rec-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .rec-column {
        padding: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

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

    .cta-button {
        padding: 12px 30px;
        font-size: 16px;
    }

    .masonry-section,
    .recommendations {
        padding: 60px 0;
    }

    .rec-item {
        flex-direction: column;
        text-align: center;
    }

    .rec-item img {
        width: 100px;
        height: 100px;
    }
}

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

.masonry-item {
    animation: fadeInUp 0.6s ease forwards;
}

/* スクロール効果 */
.masonry-item:nth-child(odd) {
    animation-delay: 0.1s;
}

.masonry-item:nth-child(even) {
    animation-delay: 0.2s;
}

/* ローディング効果 */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* ホバー効果の強化 */
.nav-link,
.cta-button,
.load-more,
.masonry-item,
.rec-item {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* スクロールバーのスタイリング */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #D4AF37;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #B8860B;
}