/* CSS Custom Properties (Variables) */
:root {
    --color-primary: #C53030;
    --color-green: #264f0e;
    --color-primary-dark: #9B2C2C;
    --color-accent: #B8860B;
    --color-accent-light: #DAA520;
    --color-white: #FFFFFF;
    --color-gray-50: #F7FAFC;
    --color-gray-100: #EDF2F7;
    --color-gray-200: #E2E8F0;
    --color-gray-300: #CBD5E0;
    --color-gray-600: #718096;
    --color-gray-700: #4A5568;
    --color-gray-800: #2D3748;
    --color-gray-900: #1A202C;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --border-radius-sm: 0.125rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-2xl: 1rem;
    
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.8s ease-in-out, visibility 0.8s;
    opacity: 1;
    visibility: visible;
}

.loading-logo {
    /* Start with the pulsing animation */
    animation: pulse 1.5s infinite ease-in-out;
}

.loading-logo.is-ending {
    /* Switch to the growing animation */
    animation: growAndFill 1.5s forwards ease-in-out;
}

.loading-logo img {
    max-width: 150px;
    height: auto;
}

body.loaded .loading-overlay {
    opacity: 0;
    visibility: hidden;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes growAndFill {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(50);
        opacity: 0;
    }
}

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

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: transparent; /* Initially transparent */
    z-index: 999;
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 90px; /* Increased from 80px */
}

.nav-logo .logo-img {
    height: 60px; /* Increased from 50px */
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-2); /* Reduced gap */
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all var(--transition-normal);
    padding: var(--spacing-2) var(--spacing-5); /* Adjusted padding */
    border-radius: var(--border-radius-lg);
    position: relative;
    background-color: rgb(226, 232, 240, 0.6);
}

.header.scrolled .nav-link {
    color: var(--color-gray-700);
    text-shadow: none;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-gray-200);
}

.header.scrolled .nav-link:hover {
    background-color: var(--color-gray-100);
    color: var(--color-primary);
}

.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-gray-200);
}

.header.scrolled .nav-link.active {
    background-color: var(--color-gray-200);
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    z-index: 10000;
    position: relative;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    transition: all var(--transition-fast);
}

.header.scrolled .nav-toggle span {
    background: var(--color-gray-700);
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section - Slideshow */
.hero-slideshow {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: flex-end; /* Align content to the bottom */
    justify-content: flex-start; /* Align content to the left */
    text-align: left; /* Align text to the left */
    color: var(--color-white);
    overflow: hidden;
}

@media (max-width: 768px) {
    .hero-slideshow {
        min-height: 70vh; /* Reduce height on mobile */
    }
}

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

.slide-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 2s ease-in-out;
    animation: zoom-pan 20s infinite;
}

.slide-image.active {
    opacity: 1;
}

.hero-slideshow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent 50%); /* Bottom dark gradient */
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 3;
    padding: var(--spacing-16);
    max-width: 800px;
}

.hero-logo-wrapper {
    position: absolute;
    background-color: rgb(255, 255, 255, 0.7);
    border-radius: 150px;
    top: 100px;
    right: 25px;
    z-index: 2;
    padding: 10px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.hero-logo-wrapper.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-logo-white {
    max-width: 225px;
    margin: 0;
}

.hero-main-copy {
    font-family: "Sawarabi Mincho";
    font-size: 2.8rem; /* Adjusted size */
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: var(--spacing-8);
    text-shadow: 1px 1px 8px rgba(0,0,0,0.5);
}

.hero-main-copy .line {
    display: block;
    overflow: hidden;
}

.hero-main-copy .line span {
    display: block;
    transform: translateY(100%);
    opacity: 0;
    transition: transform 0.8s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.8s ease-out;
}

.hero-main-copy.visible .line:nth-child(1) span {
    transition-delay: 0.5s;
    transform: translateY(0);
    opacity: 1;
}

.hero-main-copy.visible .line:nth-child(2) span {
    transition-delay: 0.7s;
    transform: translateY(0);
    opacity: 1;
}

.hero-sub-copy {
    font-family: 'M PLUS 1p', sans-serif;
    font-size: 1rem; /* Adjusted size */
    line-height: 1.8;
    max-width: 600px;
    text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease-out 1s, transform 1s ease-out 1s;
}

.hero-sub-copy.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes zoom-pan {
    0% {
        transform: scale(1) translate(0, 0);
    }
    50% {
        transform: scale(1.1) translate(-5%, 5%);
    }
    100% {
        transform: scale(1) translate(0, 0);
    }
}


/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-4);
    position: relative;
}

.section-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin: 0 auto;
    border-radius: var(--border-radius-sm);
}

/* CEO Message Section */
.ceo-message {
    padding: var(--spacing-24) 0;
    background: var(--color-gray-50);
}

.ceo-content {
    display: grid;
    grid-template-columns: 1.1fr 2fr;
    gap: var(--spacing-12);
    align-items: start;
}

.ceo-photo {
    text-align: center;
}

.ceo-img {
    width: 100%;
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.ceo-text {
    space-y: var(--spacing-6);
}

.message-paragraph {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--spacing-2);
    color: var(--color-gray-700);
}

.ceo-company-title {
    font-weight: normal;
    color: var(--color-green);
    display: block;
}

.ceo-name {
    font-weight: bold;
    color: var(--color-green);
    display: block;
    font-size: 1.875rem;
    margin-top: var(--spacing-1);
}

/* Logo Description Section */
.logo-description {
    padding: var(--spacing-24) 0;
    background: var(--color-white);
}

.logo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: center;
}

.logo-visual {
    text-align: center;
}

.logo-large {
    max-width: 400px;
    margin: 0 auto;
}
@media (max-width: 768px) {
    .logo-large {
    max-width: 100%;
}
}

.description-paragraph {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-gray-700);
}

/* Featured Sections */
.featured-sections {
    display: flex;
    width: 100%;
    height: 500px; /* Adjust height as needed */
}

.featured-block {
    flex: 1;
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--color-white);
    font-size: var(--font-size-5xl);
    font-weight: 700;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    transition: background-size 0.3s ease-in-out, z-index 0s;
    z-index: 0;
    background-size: 100% 100%;
}

.featured-block:hover {
    background-size: 105% 105%;
    z-index: 10;
}

.featured-block .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4); /* Dark overlay */
    transition: background 0.3s ease-in-out;
}

.featured-block:hover .overlay {
    background: rgba(0, 0, 0, 0.6); /* Darker on hover */
}

.featured-title {
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
    margin-bottom: var(--spacing-2); /* Add margin below title */
}

.featured-subtitle {
    position: relative;
    z-index: 1;
    color: var(--color-white);
    font-size: var(--font-size-lg);
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.7);
}

/* Responsive adjustments for featured sections */
@media (max-width: 768px) {
    .featured-sections {
        flex-direction: column;
        height: auto;
    }

    .featured-block {
        height: 300px; /* Adjust height for mobile */
        font-size: var(--font-size-4xl);
        padding: 75px 0;
    }
    
    /* ロゴ responsive */
    .hero-logo-wrapper {
        top: 20px;
        right: 20px;
    }
    
    .hero-logo-white {
        max-width: 150px;
    }
    
}
.btn {
    display: inline-block;
    padding: var(--spacing-4) var(--spacing-8);
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--color-gray-50);
}

/* Footer */
.footer {
    background: var(--color-gray-800);
    color: var(--color-white);
    padding: var(--spacing-16) 0 var(--spacing-8);
    position: relative;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.footer-main-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-left-column {
    flex: 2;
}

.footer-right-column {
    flex: 1;
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-4);
}

.footer-logo-company {
    margin-bottom: var(--spacing-4);
}

.footer-company-logo-img {
    height: 40px; /* Adjust as needed */
    width: auto;
}

.footer-company-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    display: flex;
    align-items: baseline;
}

.footer-anniversary-text {
    font-size: var(--font-size-base);
    color: var(--color-gray-300);
    margin-left: var(--spacing-2);
}

.footer-address,
.footer-contact {
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    line-height: 1.5;
    margin-top: var(--spacing-4);
}

.footer-contact .tel-fax,
.footer-contact .free-dial {
    display: inline-block;
    margin-right: var(--spacing-4); /* Space between phone numbers */
}

@media (max-width: 768px) {
    .footer {
        padding: var(--spacing-12) 0 var(--spacing-6);
    }

    .footer-main-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-left-column {
        width: 100%;
    }

    .footer-right-column {
        text-align: center;
        margin-top: var(--spacing-6);
        justify-content: center;
    }

    .footer .back-to-top-btn {
        position: absolute !important;
        top: var(--spacing-4) !important;
        right: var(--spacing-4) !important;
        width: 50px !important;
        height: 50px !important;
    }

    .footer .back-to-top-btn .material-symbols-outlined {
        font-size: 20px !important;
    }

    .footer .back-to-top-btn .back-to-top-text {
        font-size: 0.6rem !important;
    }

    .footer-company-name {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-anniversary-text {
        margin-left: 0;
        margin-top: var(--spacing-1);
    }

    .footer-contact .tel-fax,
    .footer-contact .free-dial {
        display: block;
        margin-right: 0;
    }
}

.corporate-site-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-4);
    border: 1px solid var(--color-accent-light);
    border-radius: var(--border-radius-md);
    color: var(--color-accent-light);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.corporate-site-link:hover {
    background: var(--color-accent-light);
    color: var(--color-white);
}

.corporate-site-link .material-symbols-outlined {
    font-size: var(--font-size-base);
}

/* Back to Top Button */
.back-to-top-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border: none;
    border-radius: 50%;
    color: var(--color-white);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    opacity: 0.8;
    z-index: 1000;
    pointer-events: auto;
    position: relative;
}

.back-to-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    opacity: 1;
}

.back-to-top-btn .material-symbols-outlined {
    font-size: 24px;
    margin-bottom: 2px;
}

.back-to-top-text {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    line-height: 1;
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-6);
    text-align: center;
}

.copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

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

@keyframes scrollLine {
    0%, 100% {
        transform: scaleY(1);
        opacity: 1;
    }
    50% {
        transform: scaleY(1.5);
        opacity: 0.7;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body.nav-open {
        overflow: hidden;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(26, 32, 44, 0.85); /* Semi-transparent dark background */
        backdrop-filter: blur(10px) saturate(180%);
        -webkit-backdrop-filter: blur(10px) saturate(180%);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-slow), visibility var(--transition-slow);
        z-index: 9999; /* Much higher z-index to override all stacking contexts */
        pointer-events: none; /* Prevent interaction when hidden */
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto; /* Enable interaction when active */
    }

    .nav-menu .nav-item {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease-out, transform 0.4s ease-out;
        list-style: none !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .nav-menu.active .nav-item {
        opacity: 1;
        transform: translateY(0);
    }

    /* Staggered animation for nav items */
    .nav-menu.active .nav-item:nth-child(1) {
        transition-delay: 0.2s;
    }
    .nav-menu.active .nav-item:nth-child(2) {
        transition-delay: 0.3s;
    }
    .nav-menu.active .nav-item:nth-child(3) {
        transition-delay: 0.4s;
    }

    .nav-menu .nav-link {
        font-family: 'M PLUS 1p', sans-serif !important;
        font-size: var(--font-size-3xl) !important;
        font-weight: 700 !important;
        color: var(--color-white) !important;
        text-shadow: none !important;
        padding: var(--spacing-2) 0 !important;
        margin: var(--spacing-1) 0 !important;
        border-radius: 0 !important;
        background: transparent !important;
        transition: color var(--transition-normal), transform var(--transition-normal) !important;
        display: block !important;
        text-align: center !important;
    }

    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background: transparent !important;
        color: var(--color-accent-light) !important;
        transform: scale(1.1) !important;
    }
    
    .nav-toggle {
        display: flex;
        position: relative;
        z-index: 10000;
    }
    
    /* Hero section mobile styles */
    .hero-main-copy {
        font-size: 1.8rem; /* Reduce from 2.8rem */
        line-height: 1.4;
        margin-bottom: var(--spacing-6);
    }
    
    .hero-sub-copy {
        font-size: 0.9rem; /* Reduce from 1rem */
        line-height: 1.6;
    }
    
    .hero-container {
        padding: var(--spacing-8); /* Reduce padding */
    }
    
    .hero-logo-wrapper {
        top: 50px;
        right: 15px;
    }
    
    .hero-logo-white {
        max-width: 120px; /* Further reduce logo size */
    }
    
    .ceo-content,
    .logo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
        text-align: center;
    }
    
    .ceo-signature {
        text-align: center;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .teaser-title {
        font-size: var(--font-size-3xl);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .container {
        padding: 0 var(--spacing-3);
    }
}

@media (max-width: 480px) {
    .hero-slideshow {
        min-height: 60vh; /* Further reduce on very small screens */
    }
    
    .hero-main-copy {
        font-size: 1.5rem; /* Further reduce font size */
        line-height: 1.3;
    }
    
    .hero-sub-copy {
        font-size: 0.8rem;
    }
    
    .hero-container {
        padding: var(--spacing-6);
    }
    
    .hero-logo-white {
        max-width: 100px;
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .message-paragraph,
    .description-paragraph {
        font-size: var(--font-size-sm);
        line-height: 1.6;
        text-align: left;
    }
    
    .container {
        padding: 0 var(--spacing-2);
    }
}