/* style.css */

/* リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本設定 */
body {
    font-family: 'Noto Sans JP', sans-serif;
    background: linear-gradient(to bottom, #1a1a1a, #2C3E50);
    color: #fff;
    line-height: 1.6;
    min-height: 100vh;
}

/* フォント設定 */
h1, h2, h3 {
    font-family: 'Playfair Display', serif;
    color: #D4AF37; /* ゴールドネオンのアクセント */
    text-shadow: 0 0 5px rgba(212, 175, 55, 0.5);
    margin-bottom: 20px;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    border-bottom: 2px solid rgba(212, 175, 55, 0.3);
    padding-bottom: 10px;
    margin-top: 40px;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 15px;
}

a {
    color: #D4AF37;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #FFD700;
}

.link-anchor {
    text-decoration: underline;
}

/* ヘッダー */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 10;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    padding: 15px 10%;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: auto;
}

.logo-link {
    display: block;
    width: 50px; /* ロゴのサイズ調整 */
}

.logo {
    width: 100%;
    height: auto;
    animation: glow 2s infinite alternate; /* ネオンエフェクト */
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    font-weight: 700;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: rgba(212, 175, 55, 0.2);
}

/* メインコンテンツ */
main {
    padding-top: 80px; /* ヘッダーの高さ分 */
}

.section {
    padding: 5% 10%;
    max-width: 1200px;
    margin: auto;
    opacity: 0; /* スクロールアニメーション用 */
    transform: translateY(20px); /* スクロールアニメーション用 */
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.section.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Heroセクション */
.hero {
    height: 100vh;
    background: url('https://3.itnext1.com/top.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0;
    margin-top: -80px; /* ヘッダー分を相殺 */
}

.hero-overlay {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 40px;
    border-radius: 10px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 10px;
}

.hero-small {
    height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: #1a1a1a;
}

.h1-sub {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 1.2rem;
    color: #ccc;
    margin-bottom: 30px;
}

/* ボタン */
.btn-gold, .btn-emerald {
    display: inline-block;
    color: #000;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: box-shadow 0.3s, transform 0.3s;
    margin-top: 20px;
}

.btn-gold {
    background: #D4AF37;
}

.btn-gold:hover {
    box-shadow: 0 0 20px #D4AF37;
    transform: translateY(-3px);
}

.btn-emerald {
    background: #3D9970; /* エメラルドグリーン */
    color: #fff;
}

.btn-emerald:hover {
    box-shadow: 0 0 20px #3D9970;
    transform: translateY(-3px);
}

.cta-hero {
    font-size: 1.2rem;
}

/* グリッドレイアウト */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.product-card, .review-card {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: transform 0.3s;
}

.product-card:hover, .review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

.product-card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 15px;
}

.product-card h3 {
    color: #fff;
    text-shadow: none;
}

.price {
    font-weight: 700;
    color: #FFD700;
    font-size: 1.1rem;
}

/* USPセクション */
.usp-content {
    display: flex;
    gap: 30px;
    align-items: center;
}

.usp-content img {
    max-width: 40%;
    height: auto;
    border-radius: 10px;
}

/* コンセプトセクション */
.dark-concept {
    background-color: #111;
    padding: 8% 10%;
}

.concept-content {
    display: flex;
    gap: 30px;
    align-items: center;
}

.neon-stone {
    max-width: 40%;
    height: auto;
    border-radius: 10px;
    animation: glow 3s infinite alternate;
}

/* Q&A アコーディオン */
.qa-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 10px;
}

.qa-toggle {
    cursor: pointer;
    padding: 15px 0;
    color: #fff;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    margin-bottom: 0;
    transition: color 0.3s;
}

.qa-toggle:hover {
    color: #D4AF37;
}

.qa-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    padding: 0 15px;
}

.qa-answer.show {
    max-height: 500px; /* 十分な高さ */
    padding: 15px;
}

/* CTAセクション */
.cta-section {
    text-align: center;
    padding: 8% 10%;
    background-color: #111;
}

.cta-section h1 {
    font-size: 3rem;
}

.cta-sub {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.share-buttons {
    margin-top: 40px;
}

.share-x {
    background-color: #1DA1F2;
    color: #fff;
    padding: 8px 15px;
    border-radius: 5px;
    margin-left: 10px;
}

.share-x:hover {
    background-color: #0c85d0;
}

.hidden-h1 {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* フッター */
footer {
    background-color: #000;
    padding: 30px 10%;
    text-align: center;
    font-size: 0.9rem;
}

.footer-content {
    max-width: 1200px;
    margin: auto;
}

.contact-info, .footer-links {
    margin-top: 10px;
}

.contact-info a, .footer-links a {
    color: #aaa;
    margin: 0 5px;
}

.contact-info a:hover, .footer-links a:hover {
    color: #D4AF37;
}

/* アニメーション */
@keyframes glow {
    0% {
        text-shadow: 0 0 5px #D4AF37;
        box-shadow: 0 0 5px rgba(212, 175, 55, 0.5);
    }
    50% {
        text-shadow: 0 0 20px #D4AF37;
        box-shadow: 0 0 20px rgba(212, 175, 55, 0.8);
    }
    100% {
        text-shadow: 0 0 5px #D4AF37;
        box-shadow: 0 0 5px rgba(212, 175, 55, 0.5);
    }
}

.logo {
    animation: glow 2s infinite alternate;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    header {
        padding: 10px 5%;
    }

    .header-content {
        flex-direction: column;
    }

    nav ul {
        margin-top: 10px;
        justify-content: center;
    }

    nav ul li {
        margin: 0 10px;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .section {
        padding: 5% 5%;
    }

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

    .usp-content, .concept-content {
        flex-direction: column;
    }

    .usp-content img, .neon-stone {
        max-width: 100%;
    }

    .cta-section h1 {
        font-size: 2rem;
    }
}