/* ==========================================================================
   ELE Inc. Corporate Website
   Modern, Professional Design with White/Black/Blue Color Scheme
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #1a365d;
    --color-primary-light: #2d4a7c;
    --color-primary-dark: #0f2444;
    --color-accent: #3182ce;
    --color-accent-light: #4299e1;

    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-black: #0a0a0a;

    /* Typography */
    --font-sans: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 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);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: var(--font-weight-regular);
    line-height: 1.7;
    color: var(--color-gray-800);
    background-color: var(--color-white);
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-5xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    letter-spacing: -0.02em;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    border-radius: 4px;
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-1px);
}

.pc-only {
    display: none;
}

.sp-only {
    display: inline;
}

@media (min-width: 768px) {
    .pc-only {
        display: inline;
    }
    .sp-only {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-gray-100);
}

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

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.logo-sub {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
}

.nav {
    display: none;
}

.nav-list {
    display: flex;
    gap: var(--space-xl);
}

.nav-list a {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.nav-list a:hover {
    color: var(--color-primary);
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-gray-700);
    transition: all var(--transition-base);
}

@media (min-width: 768px) {
    .nav {
        display: block;
    }
    .menu-toggle {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-5xl) var(--container-padding);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-label {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.2em;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    color: var(--color-gray-900);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-title.hero-title-xl {
    margin-bottom: var(--space-xl);
}

.hero-title .highlight {
    color: var(--color-primary);
}

.xdrive {
    display: block;
    font-size: clamp(2.5rem, 10vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
}

.xdrive-x {
    display: block;
    font-size: clamp(1.5rem, 5vw, 3rem);
    font-weight: 300;
    color: var(--color-gray-400);
    margin: var(--space-sm) 0;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--color-gray-600);
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    overflow: hidden;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.04;
}

.hero-shape-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -150px;
}

.hero-shape-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    left: -100px;
}

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

.about-content {
    display: grid;
    gap: var(--space-3xl);
}

.about-text {
    max-width: 700px;
}

.about-lead {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
    margin-bottom: var(--space-lg);
    line-height: 1.9;
}

.about-text p {
    color: var(--color-gray-600);
    line-height: 1.9;
}

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

.info-table tr {
    border-bottom: 1px solid var(--color-gray-200);
}

.info-table th,
.info-table td {
    padding: var(--space-md) 0;
    text-align: left;
    vertical-align: top;
}

.info-table th {
    width: 120px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
}

.info-table td {
    font-size: 0.9375rem;
    color: var(--color-gray-800);
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

/* --------------------------------------------------------------------------
   Representative Section
   -------------------------------------------------------------------------- */
.representative {
    background-color: var(--color-gray-50);
}

.representative-content {
    max-width: 720px;
    margin: 0 auto;
}

.representative-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-gray-200);
}

.representative-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-xs);
}

.representative-role {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
}

.representative-body {
    margin-top: var(--space-xl);
}

.representative-subtitle {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-800);
    margin-bottom: var(--space-lg);
}

.representative-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.representative-timeline li {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding-left: var(--space-lg);
    border-left: 3px solid var(--color-accent);
    position: relative;
    left: -1px;
}

/* 執行役員就任の項目内の小さい写真 */
.timeline-item-with-photo .timeline-photo-block {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-sm);
}

@media (min-width: 640px) {
    .timeline-item-with-photo .timeline-photo-block {
        flex-direction: row;
        align-items: flex-start;
    }
}

.timeline-photo {
    flex-shrink: 0;
    margin: 0;
}

.timeline-photo img {
    display: block;
    max-width: 140px;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--color-gray-200);
}

.timeline-text-block .timeline-text {
    display: block;
}

.timeline-period {
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.timeline-text {
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    line-height: 1.8;
}


/* --------------------------------------------------------------------------
   Philosophy Section
   -------------------------------------------------------------------------- */
.philosophy {
    background-color: var(--color-primary);
    padding: var(--space-4xl) 0;
}

.philosophy-content {
    text-align: center;
}

.philosophy-quote {
    max-width: 800px;
    margin: 0 auto;
}

.philosophy-quote p {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    font-weight: var(--font-weight-light);
    color: var(--color-white);
    line-height: 2;
    letter-spacing: 0.02em;
}

.philosophy-sub {
    margin-top: var(--space-xl);
    font-size: 0.9375rem !important;
    color: rgba(255, 255, 255, 0.7) !important;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services {
    background-color: var(--color-gray-50);
}

.services-grid {
    display: grid;
    gap: var(--space-xl);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--space-2xl);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

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

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

.service-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.service-description {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.service-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .services-grid.services-grid-2col {
        grid-template-columns: repeat(2, 1fr);
    }
}

.service-link {
    display: inline-block;
    margin-top: var(--space-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.service-link:hover {
    color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Achievements Section
   -------------------------------------------------------------------------- */
.achievements {
    background-color: var(--color-white);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.achievement-card {
    text-align: center;
    padding: var(--space-xl);
}

.achievement-number {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.achievement-number .unit {
    font-size: 0.4em;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
}

.achievement-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.achievements-note {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-gray-400);
    margin-top: var(--space-2xl);
}

@media (min-width: 768px) {
    .achievements-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Value Section
   -------------------------------------------------------------------------- */
.value {
    background-color: var(--color-gray-50);
}

.value-content {
    display: grid;
    gap: var(--space-3xl);
    align-items: center;
}

.value-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.value-text p {
    color: var(--color-gray-600);
    margin-bottom: var(--space-md);
    line-height: 1.9;
}

.value-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.chart-bar {
    position: relative;
}

.chart-label {
    display: block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.chart-fill {
    height: 8px;
    background-color: var(--color-gray-200);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.chart-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 4px;
    animation: fillBar 1.5s ease-out forwards;
}

.chart-bar-1 .chart-fill::after {
    width: 95%;
}

.chart-bar-2 .chart-fill::after {
    width: 40%;
    animation-delay: 0.3s;
}

@keyframes fillBar {
    from {
        width: 0;
    }
}

@media (min-width: 768px) {
    .value-content {
        grid-template-columns: 1fr 1fr;
    }
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact {
    background-color: var(--color-white);
}

.contact-content {
    text-align: center;
}

.contact-text {
    font-size: 1rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.contact-notice {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.contact-methods {
    display: flex;
    justify-content: center;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-2xl) var(--space-3xl);
    background-color: var(--color-gray-50);
    border-radius: 8px;
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.contact-card:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.contact-card:hover .contact-icon svg {
    color: var(--color-white);
}

.contact-card:hover .contact-label,
.contact-card:hover .contact-value {
    color: var(--color-white);
}

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

.contact-icon svg {
    width: 100%;
    height: 100%;
    color: var(--color-accent);
    transition: color var(--transition-base);
}

.contact-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-xs);
    transition: color var(--transition-base);
}

.contact-value {
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
    transition: color var(--transition-base);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background-color: var(--color-gray-900);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid var(--color-gray-700);
}

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

.footer .logo-sub {
    color: var(--color-gray-400);
}

.footer-tagline {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-top: var(--space-sm);
}

.footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
}

.footer-nav a {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-white);
}

.footer-notice {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    line-height: 1.6;
    padding-top: var(--space-lg);
    margin: 0;
    border-top: 1px solid var(--color-gray-700);
}

.footer-bottom {
    padding-top: var(--space-xl);
}

.copyright {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

/* イースターエッグ（隠しリンク） */
.easter-egg {
    display: inline-block;
    margin-left: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-gray-700);
    color: var(--color-gray-400);
    text-decoration: none;
    font-size: 0.75rem;
    border-radius: 4px;
    opacity: 0.5;
    transition: all 0.3s ease;
}

.easter-egg:hover {
    opacity: 1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-white);
    transform: scale(1.1);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

/* --------------------------------------------------------------------------
   Mobile Navigation
   -------------------------------------------------------------------------- */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background-color: var(--color-white);
    display: flex;
    flex-direction: column;
    padding: var(--space-5xl) var(--container-padding);
    transform: translateX(100%);
    transition: transform var(--transition-base);
}

.mobile-nav.is-open {
    transform: translateX(0);
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-nav-list a {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Fade in animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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