:root {
    --primary-color: #1a303a; 
    --accent-color: #d4c3a3;  
    --bg-beige: #f9f6f0;      
    --text-color: #1c1c1c;    
    --font-en: 'Montserrat', sans-serif;
    --font-jp: 'Zen Kaku Gothic New', sans-serif;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
    100% { transform: translateY(0px); }
}

@keyframes textReveal {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

body {
    margin: 0;
    font-family: var(--font-jp);
    color: var(--text-color);
    background-color: #ffffff;
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 30px;
}

.section-padding {
    padding: 100px 0;
}

.bg-light {
    background-color: var(--bg-beige);
}

.section-title {
    font-family: var(--font-en);
    font-size: 2.8rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 70px;
    letter-spacing: 4px;
    color: var(--primary-color);
}

.section-title span {
    display: block;
    font-family: var(--font-jp);
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 700;
    margin-top: 12px;
    letter-spacing: 2px;
}

.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    box-shadow: 0 4px 20px rgba(26, 48, 58, 0.04);
    z-index: 1000;
    box-sizing: border-box;
}

.site-header .logo {
    font-family: var(--font-en);
    font-weight: 900;
    font-size: 1.5rem;
    color: var(--primary-color);
    letter-spacing: 2px;
    flex-shrink: 0;
}

.site-header .sub-logo {
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--accent-color);
    margin-left: 8px;
    letter-spacing: 1px;
}


.menu-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1100;
}
.menu-toggle img {
    width: 25px;
    height: 25px;
    filter: invert(15%) sepia(20%) saturate(1200%) hue-rotate(160deg);
}

.main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    padding: 30px 0;
    box-sizing: border-box;
    z-index: 1150; /* ヘッダーの上に重なるように */
}


.main-nav.active {
    display: block !important;
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    z-index: 1150;
}

.main-nav ul {
    display: flex;
    flex-direction: column; 
    gap: 25px;
    align-items: center;
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-header nav a {
    text-decoration: none;
    color: var(--text-color);
    font-family: var(--font-en);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 1px;
    display: inline-block;
}


a.btn-login,
.btn-login {
    display: inline-block;      
    white-space: nowrap;        
    padding: 12px 28px;         
    background-color: var(--primary-color) !important;
    color: #ffffff !important;                         
    font-weight: bold !important;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-decoration: none;      
    border-radius: 50px; 
    box-shadow: 0 4px 15px rgba(26, 48, 58, 0.2);
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s !important;
}

a.btn-login:hover,
.btn-login:hover {
    background-color: #0f1e24 !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 48, 58, 0.3);
}



@media (min-width: 769px) {
    .site-header {
        padding: 20px 40px;
    }

    .menu-toggle {
        display: none !important;
    }

    .main-nav {
        display: flex !important;
        flex-grow: 1;
        position: relative !important; 
        width: 100% !important; 
        background: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        justify-content: center;
        align-items: center; 
    }


    .main-nav ul.nav-list {
        display: flex !important;
        flex-direction: row !important; 
        gap: 40px !important;
        width: 100%;
        max-width: 1000px;
        justify-content: center; 
        align-items: center !important;
        padding: 0 !important;
        margin: 0 !important;
    }


    .main-nav ul,
    .main-nav ul.nav-list {
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        gap: 40px !important;
    }

    .main-nav ul.nav-list li {
        display: inline-flex !important;
        align-items: center !important;
    }

    .site-header nav a {
        font-size: 0.85rem;
        position: relative;
        padding-bottom: 4px;
    }


    .main-nav ul.nav-list li.login-li {
        margin-left: 0 !important;
        position: static !important;
        transform: none !important;
    }


    .site-header .login-li {
        position: absolute !important;
        right: 40px !important;
        top: 50% !important;
        transform: translateY(-50%) !important;
        z-index: 1200 !important;
    }


    .site-header nav a::after {
        content: '';
        position: absolute;
        bottom: 0; left: 0;
        width: 100%; height: 2px;
        background-color: var(--accent-color);
        transform: scaleX(0);
        transform-origin: right;
        transition: transform 0.3s ease;
    }
    
    .site-header nav a:hover::after {
        transform: scaleX(1);
        transform-origin: left;
    }
}


.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    text-align: center;
    width: 90%;
    pointer-events: none;
}

.hero-title {
    font-family: var(--font-en);
    font-size: clamp(2.8rem, 6.4vw, 4.8rem);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 25px;
    color: var(--primary-color) !important;
    text-shadow: 0 10px 30px rgba(255, 255, 255, 0.8);
    animation: textReveal 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-title span {
    color: var(--accent-color) !important;
    text-shadow: 0 10px 30px rgba(255, 255, 255, 0.8);
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 700;
    color: #444;
    letter-spacing: 1px;
    line-height: 2;
}

.hero-swiper {
    width: 100%;
    height: 100%;
}

.hero-slide {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.slide-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: transparent;
}

#textCloudCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.activity-card {
    background: white;
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(26, 48, 58, 0.03);
    text-align: center;
    border: 1px solid rgba(212, 195, 163, 0.2);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s ease;
}

.activity-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 20px 40px rgba(26, 48, 58, 0.08);
}

.activity-card h3 {
    font-family: var(--font-en);
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.text-link {
    display: inline-block;
    margin-top: 20px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s, transform 0.3s;
}
.text-link:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.qa-item {
    margin-bottom: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(26, 48, 58, 0.02);
    border: 1px solid rgba(212, 195, 163, 0.15);
}

.qa-question {
    width: 100%;
    padding: 24px;
    color: var(--primary-color);
    font-size: 1.05rem;
}

footer {
    background: var(--primary-color);
    color: #ffffff;
    padding: 80px 0;
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: var(--accent-color);
}

.footer-social-icons .social-icon {
    width: 40px;
    height: 40px;
    filter: invert(1) brightness(10);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.footer-social-icons a:hover .social-icon {
    transform: translateY(-5px) scale(1.2);
}

.news-list { list-style: none; padding: 0; max-width: 800px; margin: 0 auto; }
.news-list li { border-bottom: 1px solid rgba(212, 195, 163, 0.2); padding: 22px 0; display: flex; align-items: center; }
.news-list .date { font-family: var(--font-en); font-weight: bold; color: #aaa; width: 120px; }
.news-list .category { background: var(--accent-color); color: var(--primary-color); font-weight: bold; padding: 3px 12px; font-size: 0.75rem; margin-right: 20px; border-radius: 4px; }
.news-list a { font-weight: bold; text-decoration: none; color: var(--text-color); transition: color 0.3s; }
.news-list a:hover { color: var(--accent-color); }