:root {
    /* Color Palette - Night Sky & Forest */
    --c-bg: #0d1318;      /* Deep navy/black background */
    --c-surface: #162028; /* Slightly lighter surface for cards */
    --c-text: #e6ebef;    /* Main text (soft white/blueish) */
    --c-text-muted: #9aa8b5;
    --c-accent: #dac07e;  /* Soft gold */
    --c-accent-dark: #b59b56;
    --c-border: rgba(218, 192, 126, 0.15); /* Soft gold border */
    
    /* Typography */
    --f-serif: 'Noto Serif JP', serif;
    --f-sans: 'Noto Sans JP', sans-serif;
    
    /* Transitions */
    --transition-slow: 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-fast: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--c-bg);
    color: var(--c-text);
    font-family: var(--f-sans);
    line-height: 1.8;
    overflow-x: hidden;
}

.serif {
    font-family: var(--f-serif);
    font-weight: 300;
}

.center {
    text-align: center;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5vw;
}

.section-padding {
    padding: 10rem 0;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 0.5rem 5vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: background-color var(--transition-fast), padding var(--transition-fast);
}

header.scrolled {
    background-color: rgba(13, 19, 24, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 5vw;
    border-bottom: 1px solid var(--c-border);
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 7rem;
    width: auto;
    display: block;
    transition: height 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

header.scrolled .logo img {
    height: 4rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 3rem;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--c-text);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    transition: color var(--transition-fast);
}

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

.lang-switcher {
    display: flex;
    gap: 0.8rem;
    margin-left: 2rem;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--c-border);
    color: var(--c-text-muted);
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover, .lang-btn.active {
    border-color: var(--c-accent);
    color: var(--c-accent);
    background: rgba(218, 192, 126, 0.1);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle .bar {
    height: 2px;
    width: 100%;
    background-color: var(--c-text);
    transition: all 0.3s ease;
}

.menu-toggle.active .bar:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--c-accent);
    color: var(--c-accent);
    padding: 0.6rem 1.5rem;
    border-radius: 40px;
    cursor: pointer;
    font-family: var(--f-sans);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: var(--c-accent);
    color: var(--c-bg);
}

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

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

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity 2s ease-in-out, transform 8s linear;
}

.slide.active {
    opacity: 1;
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(13,19,24,0.4) 0%,
        rgba(13,19,24,0.2) 50%,
        rgba(13,19,24,1) 100%
    );
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    width: 100%;
    padding: 0 2rem;
}

.hero-caption {
    font-size: 1.2rem;
    color: var(--c-accent);
    letter-spacing: 0.3em;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 5rem);
    line-height: 1.4;
    text-shadow: 0 10px 30px rgba(0,0,0,0.8);
    letter-spacing: 0.05em;
}

.scroll-indicator {
    position: absolute;
    bottom: -15vh;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.scroll-indicator span {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    color: var(--c-accent);
}

.scroll-indicator .line {
    width: 1px;
    height: 80px;
    background: linear-gradient(to bottom, var(--c-accent), transparent);
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.delay-1 { animation-delay: 0.4s; }
.delay-2 { animation-delay: 0.8s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all var(--transition-slow);
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 3rem);
    color: var(--c-accent);
    line-height: 1.5;
    margin-bottom: 3rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--c-text-muted);
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
    position: relative;
    z-index: 2;
}

.image-frame {
    position: absolute;
    top: -20px;
    left: 20px;
    width: 100%;
    height: 100%;
    border: 1px solid var(--c-accent);
    z-index: 1;
}

/* Stats */
.stats-container {
    display: flex;
    justify-content: space-around;
    margin-top: 8rem;
    padding-top: 4rem;
    border-top: 1px solid var(--c-border);
}

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

.stat-number {
    font-size: 4rem;
    color: var(--c-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--c-text-muted);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(13, 19, 24, 0.95);
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.modal-content {
    background-color: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 8px;
    padding: 3rem;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform var(--transition-fast);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    color: var(--c-accent);
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.3s;
}

.close-btn:hover {
    color: #fff;
}

.map-btn {
    display: inline-block;
    width: 100%;
    text-align: center;
    padding: 1rem;
    background: var(--c-accent);
    color: var(--c-bg);
    border: none;
    font-weight: 600;
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.map-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

@media (max-width: 768px) {
    .detail-content-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    
    .menu-toggle { display: flex; }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--c-bg);
        border-left: 1px solid var(--c-border);
        transition: right var(--transition-fast);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    
    .nav-menu.active { right: 0; }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 2rem;
    }

    .stats-container { flex-direction: column; gap: 3rem; }
}

/* Routes Section */
#route-container {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.route-card {
    display: flex;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.route-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border-color: rgba(218, 192, 126, 0.4);
}

.route-card.special {
    background: linear-gradient(135deg, #0a0e12 0%, #162028 100%);
    border-color: rgba(181, 155, 86, 0.3);
}

.route-card.special:hover {
    border-color: var(--c-accent-dark);
    box-shadow: 0 20px 50px rgba(0,0,0,0.7);
}

.route-card.special .route-img {
    filter: sepia(0.2) contrast(1.1);
}

.route-img {
    flex: 0 0 40%;
    background-size: cover;
    background-position: center;
    min-height: 300px;
}

.route-info {
    flex: 1;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.route-subtitle {
    color: var(--c-accent);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}

.route-title {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 1.5rem;
}

.route-desc {
    color: var(--c-text-muted);
    margin-bottom: 2rem;
}

.route-meta {
    font-size: 0.85rem;
    color: var(--c-text-muted);
    border-top: 1px dashed var(--c-border);
    padding-top: 1rem;
    margin-top: auto;
}

/* Archive Search & Filter */
.search-filter-container {
    max-width: 800px;
    margin: 0 auto 4rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.shrine-search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--c-border);
    border-radius: 4px;
    color: var(--c-text);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.shrine-search-input:focus {
    border-color: var(--c-accent);
    background: rgba(255,255,255,0.1);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.filter-tag {
    background: transparent;
    border: 1px solid rgba(218, 192, 126, 0.3);
    color: var(--c-text-muted);
    padding: 0.4rem 1rem;
    border-radius: 40px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.filter-tag:hover {
    border-color: var(--c-accent);
    color: var(--c-text);
}

.filter-tag.active {
    background: var(--c-accent);
    color: var(--c-bg);
    border-color: var(--c-accent);
}

/* 125 Archive Grid */
.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.archive-item {
    background: rgba(218, 192, 126, 0.05);
    border: 1px solid rgba(218, 192, 126, 0.4);
    padding: 2rem 1.5rem;
    border-radius: 4px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}


.archive-item:hover {
    background: var(--c-accent);
    transform: translateY(-3px);
}

.archive-item:hover .archive-num,
.archive-item:hover .archive-name {
    color: var(--c-bg);
}

.archive-num {
    display: block;
    font-size: 0.9rem;
    color: var(--c-accent);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    transition: color var(--transition-fast);
}

.archive-name {
    font-size: 1.1rem;
    color: var(--c-text);
    transition: color var(--transition-fast);
}

/* Shrine Modal Inner Styles */
.modal-layout {
    display: flex;
    gap: 3rem;
}

.modal-img {
    flex: 0 0 45%;
    border-radius: 4px;
    background-size: cover;
    background-position: center;
    min-height: 400px;
}

.modal-info {
    flex: 1;
}

.modal-badge {
    color: var(--c-accent);
    letter-spacing: 0.2em;
    font-size: 0.9rem;
}

.modal-title {
    font-size: 2.2rem;
    color: #fff;
    margin: 0.5rem 0 0.2rem;
}

.modal-furi {
    font-size: 0.85rem;
    color: var(--c-text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

.modal-data-row {
    background: rgba(255,255,255,0.03);
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 2rem;
    border-left: 3px solid var(--c-accent);
}

.modal-data-row .label {
    display: block;
    font-size: 0.8rem;
    color: var(--c-text-muted);
    margin-bottom: 0.3rem;
}

.modal-data-row .value {
    font-size: 1.1rem;
    color: var(--c-text);
}

.modal-history p {
    color: var(--c-text-muted);
    margin-bottom: 2rem;
}

.modal-access {
    background: rgba(0,0,0,0.2);
    padding: 1.5rem;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.05);
}

.modal-access strong {
    display: block;
    color: var(--c-accent);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.modal-access p {
    font-size: 0.95rem;
    color: var(--c-text-muted);
}

@media (max-width: 768px) {
    .route-card { flex-direction: column; }
    .route-img { min-height: 250px; }
    .modal-layout { flex-direction: column; }
    .modal-img { min-height: 300px; }
    .modal-content { padding: 2rem; }
}

/* Walking Guide Styles */
.walking-guide h3 {
    font-size: 1.4rem;
    letter-spacing: 0.1em;
}

.walking-guide ul li {
    line-height: 1.6;
    position: relative;
    margin-bottom: 0.8rem;
}

/* Route Shrine List item spacing */
.route-shrine-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    transition: background 0.3s;
    text-decoration: none;
    color: var(--c-text);
}

.route-shrine-item:hover {
    background: rgba(218, 192, 126, 0.05);
    color: var(--c-accent);
}