@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;700&family=Noto+Serif+JP:wght@600;900&family=Montserrat:wght@300;600&display=swap');

:root {
    --primary-bg: #051421; /* 深い海のようなネイビーブルー */
    --secondary-bg: #0b2239; /* 少し明るいネイビー */
    --accent: #f2a65a; /* 夕日を思わせるサンセットオレンジ */
    --text-main: #f0f0f0;
    --text-sub: #b0ccd7; /* ライトスチールブルーに変更して海っぽく */
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Noto Serif JP', serif;
}

ul {
    list-style: none;
}

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

/* Scroll Animation Classes */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-up.active {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(5, 20, 33, 0.8), transparent);
    backdrop-filter: blur(5px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a:hover {
    color: var(--accent);
}

/* Hero Section */
.hero {
    height: 100vh;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    /* JSでランダムな画像を --hero-bg にセットします。JSオフの場合はフォールバック画像が表示されます。 */
    background-image: var(--hero-bg, url('../img/line_oa_chat_260404_192654.jpg'));  
    background-size: cover;
    background-position: center;
    filter: brightness(0.5);
    z-index: -1;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    letter-spacing: 0.15em;
    word-break: keep-all;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--text-sub);
}

.cta-btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--accent);
    color: var(--primary-bg);
    font-weight: bold;
    border-radius: 50px;
    letter-spacing: 0.1em;
}

.cta-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

/* Common Section Style */
section {
    padding: 100px 10%;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    display: inline-block;
    position: relative;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; width: 50px; height: 2px;
    background: var(--accent);
    transform: translateX(-50%);
}

.en-title {
    display: block;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.3em;
    margin-bottom: 10px;
}

/* About Section */
.about-container {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-img {
    flex: 1;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.about-img img {
    width: 100%;
    height: auto;
    display: block;
}

/* Highlights Grid */
.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.highlight-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 40px;
    border-radius: 15px;
    transition: 0.3s;
}

.highlight-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-10px);
}

/* Instagram Section */
.insta-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.insta-item {
    aspect-ratio: 1/1;
    overflow: hidden;
    position: relative;
}

.insta-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

.insta-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: 0.3s;
}

.insta-item:hover .insta-overlay {
    opacity: 1;
}

.insta-item:hover img {
    transform: scale(1.1);
}

.insta-info {
    font-size: 0.9rem;
    color: var(--white);
}

/* Pricing Card */
.pricing {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.price-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 50px 40px;
    border-radius: 30px;
    width: 350px;
    text-align: center;
    position: relative;
    backdrop-filter: blur(10px);
}

.price-card.featured {
    border: 1px solid var(--accent);
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.1);
}

.price-card.featured::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: 20px; right: -20px;
    background: var(--accent);
    color: var(--primary-bg);
    padding: 5px 20px;
    font-size: 0.7rem;
    font-weight: bold;
    transform: rotate(45deg);
}

.price-title {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.price-value {
    font-size: 2.5rem;
    color: var(--accent);
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 30px;
}

.price-features {
    text-align: left;
    margin-bottom: 40px;
}

.price-features li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.price-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Access */
.access-container {
    display: flex;
    gap: 50px;
}

.map-box {
    flex: 2;
    height: 400px;
    border-radius: 20px;
    overflow: hidden;
}

.info-box {
    flex: 1;
}

/* Footer */
footer {
    padding: 50px 10%;
    background: #000;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

.footer-logo {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.copyright {
    color: var(--text-sub);
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 20px;
    }
    .nav-links {
        display: none;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .about-container, .access-container {
        flex-direction: column;
    }
    .insta-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .price-card {
        width: 100%;
        box-sizing: border-box;
    }
    section {
        padding: 60px 5%;
    }
}