/* ===================================
   CSS Variables - Design Tokens
   =================================== */
:root {
    /* Colors - Dark Professional Theme */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-card: rgba(255, 255, 255, 0.03);
    
    /* Accent Colors */
    --color-accent: #c9a962;
    --color-accent-light: #e0c88a;
    --color-accent-dark: #a68a4e;
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);
    
    /* Gradients */
    --gradient-gold: linear-gradient(135deg, #c9a962 0%, #e0c88a 50%, #c9a962 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #111111 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(10,10,10,0.8) 0%, rgba(10,10,10,0) 30%, rgba(10,10,10,0) 70%, rgba(10,10,10,0.9) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(201, 169, 98, 0.2);
}

/* ===================================
   Reset & Base Styles
   =================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

/* ===================================
   Loader
   =================================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.loader-logo {
    width: 80px;
    height: auto;
    animation: pulse 1.5s ease-in-out infinite;
}

.loader-text {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ===================================
   Container
   =================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: transparent;
    transition: var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.1em;
}

.logo-icon {
    width: 32px;
    height: auto;
}

.logo-text {
    color: var(--color-text-primary);
}

/* Navigation */
.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-base);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-contact {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
}

.nav-contact:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
}

.nav-contact::after {
    display: none;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-30px) translateX(10px); }
    50% { transform: translateY(-10px) translateX(-10px); }
    75% { transform: translateY(-20px) translateX(5px); }
}

.hero-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 50% 50%, rgba(201, 169, 98, 0.08) 0%, transparent 50%),
        var(--gradient-overlay);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-md);
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(201, 169, 98, 0.1);
    border: 1px solid rgba(201, 169, 98, 0.3);
    border-radius: var(--radius-xl);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-title {
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease 0.5s both;
}

.hero-title-line {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    letter-spacing: 0.5em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.7s both;
}

.hero-description {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    font-size: 1rem;
    color: var(--color-text-muted);
    animation: fadeInUp 1s ease 0.9s both;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    transition: var(--transition-base);
    animation: fadeInUp 1s ease 1.1s both;
}

.hero-cta:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.arrow-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition-base);
}

.hero-cta:hover .arrow-icon {
    transform: translateX(5px);
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: fadeIn 1s ease 1.5s both;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* ===================================
   Section Base Styles
   =================================== */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-number {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.about-headline {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.about-stats {
    display: flex;
    gap: var(--spacing-xl);
}

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

.stat-number {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 5vw, 4rem);
    font-weight: 700;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* Services */
.services-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.service-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(201, 169, 98, 0.2);
    transform: translateY(-5px);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
}

.service-icon svg {
    width: 100%;
    height: 100%;
    stroke: var(--color-accent);
}

.service-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ===================================
   Company Section
   =================================== */
.company {
    background: var(--color-bg-primary);
}

.company-table-wrapper {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.company-table {
    width: 100%;
    border-collapse: collapse;
}

.company-table tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.company-table tr:last-child {
    border-bottom: none;
}

.company-table th,
.company-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    vertical-align: top;
}

.company-table th {
    width: 180px;
    font-weight: 500;
    color: var(--color-accent);
    background: rgba(201, 169, 98, 0.05);
    white-space: nowrap;
}

.company-table td {
    color: var(--color-text-secondary);
}

.company-table td a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-color: rgba(201, 169, 98, 0.3);
}

.company-table td a:hover {
    text-decoration-color: var(--color-accent);
}

.business-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.business-list li {
    position: relative;
    padding-left: var(--spacing-md);
}

.business-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* ===================================
   Access Section
   =================================== */
.access {
    background: var(--color-bg-secondary);
}

.access-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.access-company {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.access-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.access-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.access-item svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    stroke: var(--color-accent);
    margin-top: 2px;
}

.access-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.access-item strong {
    color: var(--color-text-primary);
}

.access-map {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.access-map iframe {
    display: block;
    filter: grayscale(100%) invert(92%) contrast(90%);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--color-bg-primary);
    padding: var(--spacing-2xl) 0;
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-methods {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition-base);
}

.contact-btn svg {
    width: 20px;
    height: 20px;
}

.contact-tel {
    background: var(--color-accent);
    color: var(--color-bg-primary);
}

.contact-tel:hover {
    background: var(--color-accent-light);
    box-shadow: var(--shadow-glow);
}

.contact-mail {
    background: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
}

.contact-mail:hover {
    background: rgba(201, 169, 98, 0.1);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg-tertiary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.1em;
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===================================
   Responsive Styles
   =================================== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-visual {
        order: -1;
    }
    
    .access-content {
        grid-template-columns: 1fr;
    }
    
    .access-map {
        order: -1;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-2xl: 5rem;
    }
    
    /* Navigation */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--color-bg-primary);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition-base);
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero */
    .hero {
        min-height: 600px;
    }
    
    .hero-scroll {
        display: none;
    }
    
    /* About */
    .about-stats {
        justify-content: center;
    }
    
    /* Company Table */
    .company-table th,
    .company-table td {
        display: block;
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .company-table th {
        padding-bottom: 0;
    }
    
    /* Contact */
    .contact-methods {
        flex-direction: column;
    }
    
    .contact-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .about-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Clients / Works Section
   =================================== */
.clients {
    background: var(--color-bg-tertiary);
    overflow: hidden;
}

.clients-marquee {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-md) 0;
}

.clients-marquee::before,
.clients-marquee::after {
    content: '';
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.clients-marquee::before {
    left: 0;
    background: linear-gradient(to right, var(--color-bg-tertiary), transparent);
}

.clients-marquee::after {
    right: 0;
    background: linear-gradient(to left, var(--color-bg-tertiary), transparent);
}

.clients-track {
    display: flex;
    animation: marquee 40s linear infinite;
}

.clients-track-reverse {
    animation: marquee-reverse 45s linear infinite;
}

.clients-list {
    display: flex;
    flex-shrink: 0;
}

.client-name {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    margin: 0 var(--spacing-xs);
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    transition: var(--transition-base);
}

.client-name:hover {
    border-color: rgba(201, 169, 98, 0.3);
    color: var(--color-accent);
    background: rgba(201, 169, 98, 0.05);
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes marquee-reverse {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

/* Pause on hover */
.clients-marquee:hover .clients-track {
    animation-play-state: paused;
}

@media (max-width: 768px) {
    .clients-marquee::before,
    .clients-marquee::after {
        width: 50px;
    }
    
    .client-name {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}