/* =========================================================================
   # Global Variables & Reset
   ========================================================================= */

:root {
    /* Colors - Midnight Luxury Palette */
    --color-navy: #0f172a;
    --color-navy-light: #1e293b;
    --color-gold: #c9a227;
    --color-gold-light: #e2c14d;
    --color-white: #ffffff;
    --color-offwhite: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-600: #475569;
    --color-gray-900: #0f172a;

    /* Fonts */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', 'Noto Sans JP', sans-serif;

    /* Spacing */
    --section-padding: 140px;
    --section-padding-mobile: 80px;
    --container-max-width: 1200px;
    --container-narrow-width: 800px;

    /* Transitions */
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

/* =========================================================================
   # Helper Classes
   ========================================================================= */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 40px;
}

.container-narrow {
    max-width: var(--container-narrow-width);
}

.section {
    padding: var(--section-padding) 0;
}

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

.text-gold {
    color: var(--color-gold);
}

.label {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 16px;
    font-weight: 600;
}

.title {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 32px;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

/* =========================================================================
   # Buttons
   ========================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 40px;
    font-weight: 600;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.btn-gold {
    background-color: var(--color-gold);
    color: var(--color-white);
}

.btn-gold:hover {
    background-color: var(--color-gold-light);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--color-gray-300);
    color: var(--color-gray-900);
}

.btn-outline:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.btn-large {
    padding: 20px 60px;
    font-size: 1rem;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--color-gold);
    margin-top: 16px;
}

.text-link:hover {
    gap: 12px;
}

/* =========================================================================
   # Navigation
   ========================================================================= */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.nav.scrolled {
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.container-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-gray-600);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* =========================================================================
   # Hero
   ========================================================================= */

.hero {
    position: relative;
    height: 95vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.7) 0%, rgba(15, 23, 42, 0.3) 100%);
}

.hero-container {
    color: var(--color-white);
    max-width: 800px;
}

.hero-label {
    font-size: 0.9rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    margin-bottom: 24px;
    font-weight: 400;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 32px;
    font-weight: 400;
    font-style: italic;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    max-width: 500px;
    margin-bottom: 48px;
    color: var(--color-gray-300);
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-white);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translate(-50%, 0);}
    40% {transform: translate(-50%, -10px);}
    60% {transform: translate(-50%, -5px);}
}

/* =========================================================================
   # Appeal (3カラム)
   ========================================================================= */

.appeal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 80px;
}

.appeal-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 20px;
}

.appeal-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 1px;
    background-color: var(--color-gold);
}

.appeal-desc {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

/* =========================================================================
   # Popular Tours
   ========================================================================= */

.tours-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.tour-card {
    background-color: var(--color-white);
    transition: var(--transition);
}

.tour-card:hover {
    transform: translateY(-8px);
}

.tour-img {
    height: 450px;
    overflow: hidden;
}

.tour-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.tour-card:hover .tour-img img {
    transform: scale(1.05);
}

.tour-content {
    padding: 40px 0;
}

.tour-content h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.tour-content p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

/* =========================================================================
   # Gallery
   ========================================================================= */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    height: 500px;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.2);
    transition: var(--transition);
}

.gallery-item:hover img {
    filter: grayscale(0);
}

/* =========================================================================
   # Reviews
   ========================================================================= */

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
}

.review-item {
    text-align: center;
}

.review-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-gray-900);
    margin-bottom: 24px;
    position: relative;
}

.review-author {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gold);
}

/* =========================================================================
   # Tour Flow (Step)
   ========================================================================= */

.flow-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.flow-item {
    padding: 0 20px;
}

.flow-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--color-gold);
    opacity: 0.3;
    margin-bottom: 16px;
}

.flow-item h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.flow-item p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

/* =========================================================================
   # Why Choose Us (Visual + Content)
   ========================================================================= */

.why-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.why-list {
    margin-top: 50px;
}

.why-list-item {
    margin-bottom: 32px;
}

.why-list-item h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--color-gold);
}

.why-list-item p {
    color: var(--color-gray-600);
}

.why-visual {
    height: 600px;
}

.why-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* =========================================================================
   # Guides Section
   ========================================================================= */

.guides-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.guide-card {
    display: flex;
    align-items: center;
    gap: 40px;
    background-color: var(--color-white);
    padding: 30px;
}

.guide-img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.guide-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.guide-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.guide-pos {
    font-size: 0.8rem;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

/* =========================================================================
   # FAQ
   ========================================================================= */

.faq-list {
    margin-top: 40px;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
}

.faq-item .icon {
    font-size: 1.5rem;
    color: var(--color-gold);
    transition: transform 0.3s;
}

.faq-item.active .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: 30px;
}

/* =========================================================================
   # CTA Section
   ========================================================================= */

.cta-section {
    padding: 180px 0;
    background-image: url('https://images.unsplash.com/photo-1493976040374-85c8e12f0c0e?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-attachment: fixed;
    text-align: center;
}

.cta-card {
    background-color: var(--color-white);
    padding: 100px 40px;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.1);
}

.cta-desc {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--color-gray-600);
}

.portfolio-badge {
    margin-top: 60px;
    font-size: 0.75rem;
    color: var(--color-gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* =========================================================================
   # Footer
   ========================================================================= */

.footer {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: 100px 0 40px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    margin-top: 16px;
}

.footer-nav {
    display: flex;
    gap: 40px;
}

.footer-nav a {
    color: var(--color-gray-300);
    font-size: 0.9rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    font-size: 0.8rem;
    color: var(--color-gray-600);
}

/* =========================================================================
   # Animations
   ========================================================================= */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

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

/* =========================================================================
   # Responsive
   ========================================================================= */

@media (max-width: 1024px) {
    .hero-title { font-size: 3.5rem; }
    .appeal-grid, .tours-grid, .reviews-grid, .flow-grid { 
        grid-template-columns: 1fr; 
        gap: 60px;
    }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); height: auto; }
    .why-container { grid-template-columns: 1fr; gap: 60px; }
    .why-visual { height: 400px; }
    .guides-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .menu-toggle { display: block; color: var(--color-navy); }
}

@media (max-width: 768px) {
    .container { padding: 0 24px; }
    .section { padding: var(--section-padding-mobile) 0; }
    .hero-title { font-size: 2.8rem; }
    .title { font-size: 2.2rem; }
    .guide-card { flex-direction: column; text-align: center; }
}