/* ============================================
   Reset CSS (Modern Lean Reset)
   ============================================ */
html { color: #333; background: #fff; font-family: sans-serif; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; }
body { margin: 0; line-height: 1; }
article, aside, details, figcaption, figure, footer, header, main, menu, nav, section, summary { display: block; }
ul, ol { list-style: none; padding: 0; margin: 0; }
a { background-color: transparent; text-decoration: none; color: inherit; }
img { border-style: none; vertical-align: middle; max-width: 100%; height: auto; }
button, input, optgroup, select, textarea { font-family: inherit; font-size: 100%; line-height: 1.15; margin: 0; border: none; background: none; cursor: pointer; }
h1, h2, h3, h4, h5, h6, p { margin: 0; font-size: inherit; font-weight: normal; }

/* ============================================
   Base Style
   ============================================ */
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 80px 20px;
}

/* Header */
header {
    background: #fff;
    padding: 15px 20px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.logo { font-weight: bold; font-size: 1.1rem; letter-spacing: 0.05em; }

.nav-menu ul { display: flex; gap: 25px; }
.nav-menu a { font-size: 0.85rem; font-weight: bold; color: #444; transition: color 0.3s; }
.nav-menu a:hover { color: #008000; }

/* Hamburger Menu Button */
.menu-btn {
    display: none;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 1100;
}

.menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: #333;
    position: absolute;
    transition: transform 0.3s, opacity 0.3s, top 0.3s;
}

.menu-btn span:nth-child(1) { top: 0; }
.menu-btn span:nth-child(2) { top: 11px; }
.menu-btn span:nth-child(3) { top: 22px; }

/* Click Animation (X) */
.menu-btn.active span:nth-child(1) { top: 11px; transform: rotate(45deg); }
.menu-btn.active span:nth-child(2) { opacity: 0; }
.menu-btn.active span:nth-child(3) { top: 11px; transform: rotate(-45deg); }

/* Hero Section */
.hero {
    height: 70vh;
    background: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.2)), url('https://images.unsplash.com/photo-1493976040374-85c8e12f0c0e?auto=format&fit=crop&q=80&w=1400') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}

.hero p { font-size: 1.1rem; margin-bottom: 15px; }
.hero h2 { font-size: 2.2rem; font-weight: bold; line-height: 1.4; }

/* Sections */
.section-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: bold;
    margin-bottom: 40px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: #008000;
    margin: 15px auto 0;
}

.about-text { text-align: center; max-width: 800px; margin: 0 auto; }
.about-text p { margin-bottom: 20px; }

/* Tour Grid */
.tour-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.img-box { background: #eee; aspect-ratio: 16/10; display: flex; align-items: center; justify-content: center; margin-bottom: 15px; font-weight: bold; color: #999; }
.tour-card h3 { font-weight: bold; margin-bottom: 10px; font-size: 1.1rem; text-align: center; }
.tour-card p { font-size: 0.9rem; color: #666; }

/* Info Section */
.info-flex { display: flex; gap: 40px; align-items: center; background: #f9f9f9; padding: 30px; border-radius: 8px; }
.info-img { flex: 1; }
.img-box-lg { background: #ddd; aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; font-weight: bold; color: #888; }
.info-details { flex: 1.2; }
.info-details h3 { font-size: 1.3rem; font-weight: bold; margin-bottom: 15px; }
.info-details p { margin-bottom: 5px; font-size: 0.95rem; }

/* Buttons */
.cta-btns { display: flex; gap: 20px; padding-top: 0; }
.btn-green, .btn-gray { 
    flex: 1; text-align: center; padding: 20px; font-weight: bold; color: #fff; border-radius: 4px; transition: opacity 0.3s;
}
.btn-green { background: #008000; }
.btn-gray { background: #b0b0b0; }
.btn-green:hover, .btn-gray:hover { opacity: 0.8; }

/* Footer */
footer { background: #005000; color: #fff; text-align: center; padding: 20px; }

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s ease-out;
}
.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .menu-btn { display: block; }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(255,255,255,0.98);
        padding-top: 100px;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .nav-menu.active { right: 0; }
    .nav-menu ul { flex-direction: column; align-items: center; gap: 30px; }
    .nav-menu a { font-size: 1.2rem; }
    
    .hero h2 { font-size: 1.5rem; }
    .tour-grid { grid-template-columns: 1fr; }
    .info-flex { flex-direction: column; padding: 15px; }
    .cta-btns { flex-direction: column; }
}