/* ================================================
   株式会社JJ Corporate Website Styles
   Brand Colors: White Base, Black Structure, Coral Red (#FF6B6B) Accent
   ================================================ */

/* ================================================
   CSS Variables & Reset
   ================================================ */
:root {
    --color-primary: #FF6B6B;
    --color-primary-dark: #E55555;
    --color-black: #1A1A1A;
    --color-gray-dark: #333333;
    --color-gray: #666666;
    --color-gray-light: #CCCCCC;
    --color-white: #FFFFFF;
    --color-bg-light: #F8F8F8;
    --color-bg-dark: #2A2A2A;
    
    --font-primary: 'Noto Sans JP', sans-serif;
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --spacing-xl: 96px;
    
    --transition: all 0.3s ease;
    --transition-slow: all 0.6s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

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

/* ================================================
   Header & Navigation
   ================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-list a {
    color: var(--color-gray-dark);
    font-weight: 500;
    font-size: 15px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition);
}

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

.nav-contact {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: 10px 24px !important;
    border-radius: 50px;
}

.nav-contact:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: var(--spacing-sm);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    list-style: none;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin-bottom: var(--spacing-xs);
}

.dropdown-menu a {
    display: block;
    padding: 12px 16px;
    font-size: 14px;
    border-radius: 6px;
}

.dropdown-menu a:hover {
    background-color: rgba(255, 107, 107, 0.1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-black);
    border-radius: 3px;
    transition: var(--transition);
}

/* ================================================
   Hero Section
   ================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1A1A1A 0%, #2A2A2A 100%);
    color: var(--color-white);
    padding-top: 80px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 107, 107, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 107, 0.1) 0%, transparent 50%);
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    letter-spacing: 0.02em;
}

.hero-subtitle {
    font-size: clamp(18px, 2.5vw, 24px);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.95);
}

.hero-description {
    font-size: clamp(14px, 1.8vw, 18px);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    cursor: pointer;
}

.scroll-indicator span {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 10px;
    background-color: var(--color-primary);
    border-radius: 3px;
    animation: scroll-down 2s infinite;
}

@keyframes scroll-down {
    0%, 100% {
        top: 10px;
        opacity: 1;
    }
    50% {
        top: 25px;
        opacity: 0.5;
    }
}

/* ================================================
   Buttons
   ================================================ */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.4);
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
}

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

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 900;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-black);
    letter-spacing: 0.02em;
}

.section-lead {
    font-size: clamp(16px, 2vw, 20px);
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-dark);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.section-text {
    font-size: clamp(14px, 1.8vw, 18px);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-text-highlight {
    font-size: clamp(16px, 2vw, 20px);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-white);
}

.section-dark .section-title {
    color: var(--color-white);
}

.section-dark .section-lead,
.section-dark .section-text {
    color: rgba(255, 255, 255, 0.9);
}

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

/* ================================================
   Identity Section
   ================================================ */
.identity {
    background-color: var(--color-white);
}

.points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.point-card {
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-light);
    border-radius: 16px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
}

.point-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.point-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 36px;
}

.point-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-black);
}

.point-card p {
    font-size: 15px;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ================================================
   Challenge Section
   ================================================ */
.challenge-list {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.challenge-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
}

.challenge-item:hover {
    background-color: rgba(255, 107, 107, 0.1);
    border-color: var(--color-primary);
    transform: translateX(10px);
}

.challenge-icon {
    font-size: 32px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.challenge-item p {
    font-size: 18px;
    margin: 0;
}

.challenge-solution {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.solution-text {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.solution-sub {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
}

/* ================================================
   Execution Flow Section
   ================================================ */
.execution-flow {
    max-width: 700px;
    margin: 0 auto;
}

.flow-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: 16px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.flow-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 30px rgba(255, 107, 107, 0.2);
}

.flow-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    font-size: 24px;
    font-weight: 900;
    border-radius: 50%;
}

.flow-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-black);
}

.flow-content p {
    font-size: 16px;
    color: var(--color-gray);
    line-height: 1.7;
}

.flow-arrow {
    text-align: center;
    margin: var(--spacing-sm) 0;
    font-size: 28px;
    color: var(--color-primary);
}

/* ================================================
   Services Section
   ================================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.service-card:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--color-primary);
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(255, 107, 107, 0.3);
}

.service-icon {
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
    font-size: 40px;
    color: var(--color-white);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.service-card p {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 15px;
}

.service-card:hover .service-link {
    gap: 12px;
}

/* ================================================
   Trust Section
   ================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) auto;
    max-width: 900px;
}

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

.stat-number {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.stat-number::after {
    content: '+';
    margin-left: 4px;
}

.stat-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray-dark);
}

.trust-text {
    text-align: center;
    font-size: 18px;
    margin: var(--spacing-lg) auto var(--spacing-md);
    color: var(--color-gray);
    line-height: 2;
}

.trust-highlight {
    text-align: center;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-black);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ================================================
   Message Section
   ================================================ */
.message {
    padding: var(--spacing-xl) 0;
}

.message-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.message-text {
    font-size: clamp(20px, 2.5vw, 28px);
    font-weight: 700;
    line-height: 1.8;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

.message-sub {
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.9;
    color: var(--color-gray);
}

/* ================================================
   CTA Section
   ================================================ */
.cta {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-dark) 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.cta-text {
    font-size: clamp(16px, 2vw, 20px);
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

/* ================================================
   Footer
   ================================================ */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo img {
    height: 50px;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 20px;
    transition: var(--transition);
}

.footer-social a:hover {
    background-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* ================================================
   Animation Classes
   ================================================ */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ================================================
   Responsive Design
   ================================================ */
@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background-color: var(--color-white);
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }
    
    .nav-list.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        margin-top: var(--spacing-sm);
    }
    
    .hero {
        min-height: 80vh;
        padding-top: 100px;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .points-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
}