/* ========================================
   Global Styles & Reset
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Ocean Color Palette */
    --color-deep-ocean: #003459;
    --color-ocean-blue: #007EA7;
    --color-bright-blue: #00A8E8;
    --color-sky-blue: #00C9FF;
    --color-white: #FFFFFF;
    --color-light-gray: #F5F9FC;
    --color-text-dark: #1A2332;
    --color-text-light: #6B7C93;
    
    /* Gradients */
    --gradient-ocean: linear-gradient(135deg, #003459 0%, #007EA7 50%, #00A8E8 100%);
    --gradient-wave: linear-gradient(90deg, rgba(0, 168, 232, 0.1) 0%, rgba(0, 126, 167, 0.1) 100%);
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-xxl: 120px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 52, 89, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 52, 89, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 52, 89, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 52, 89, 0.2);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

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

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo-svg {
    height: 50px;
    width: auto;
}

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

.nav-link {
    color: var(--color-text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-ocean);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-ocean-blue);
}

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

.nav-link-cta {
    background: var(--gradient-ocean);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-weight: 600;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-ocean-blue);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 999;
}

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

.mobile-nav-list {
    list-style: none;
    padding: var(--spacing-md);
}

.mobile-nav-list li {
    margin-bottom: var(--spacing-sm);
}

.mobile-nav-link {
    display: block;
    padding: var(--spacing-sm);
    color: var(--color-text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 18px;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--gradient-wave);
    color: var(--color-ocean-blue);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(180deg, #001a2e 0%, #003459 50%, #005a7d 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* Animated Waves */
.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200%;
    height: 200px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z' fill='%2300A8E8' fill-opacity='0.3'/%3E%3C/svg%3E");
    background-size: 50% 100px;
    animation: wave 15s linear infinite;
    opacity: 0.5;
}

.wave-1 {
    animation-duration: 20s;
    opacity: 0.3;
}

.wave-2 {
    animation-duration: 15s;
    opacity: 0.2;
    animation-delay: -5s;
}

.wave-3 {
    animation-duration: 25s;
    opacity: 0.1;
    animation-delay: -10s;
}

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

/* Particles */
.particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(0, 168, 232, 0.5);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.3s;
}

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

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    color: var(--color-sky-blue);
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
    letter-spacing: 2px;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    border: 2px solid var(--color-white);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-ocean-blue);
    transform: translateY(-3px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-white);
    font-size: 12px;
    letter-spacing: 2px;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-white), transparent);
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

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

.section-label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-bright-blue);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.section-label-white {
    color: var(--color-sky-blue);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-deep-ocean);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-ocean);
    border-radius: 2px;
}

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

.section-description {
    font-size: 18px;
    color: var(--color-text-light);
    line-height: 1.8;
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
}

.section-description-white {
    color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   Business Section
   ======================================== */
.business {
    padding: var(--spacing-xxl) 0;
    background: var(--color-light-gray);
    position: relative;
}

.business::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--color-white), transparent);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.business-card {
    background: var(--color-white);
    border-radius: 20px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-ocean);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.business-card:hover::before {
    transform: scaleX(1);
}

.business-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: var(--gradient-ocean);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 36px;
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.business-card-title {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-deep-ocean);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.business-card-description {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.business-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 15px;
    color: var(--color-text-dark);
}

.feature-item i {
    color: var(--color-bright-blue);
    font-size: 18px;
}

.business-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-ocean-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-sm);
}

.business-link:hover {
    color: var(--color-bright-blue);
    gap: var(--spacing-sm);
}

.business-tag {
    display: inline-block;
    background: linear-gradient(135deg, #FFB347, #FFCC33);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.card-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V120H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z' fill='%2300A8E8' fill-opacity='0.05'/%3E%3C/svg%3E");
    background-size: cover;
    background-position: bottom;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.business-card:hover .card-wave {
    opacity: 1;
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-top: var(--spacing-xl);
}

.about-visual {
    position: relative;
    padding: var(--spacing-lg);
}

.about-decoration {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 400px;
    margin: 0 auto;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid;
    opacity: 0.3;
}

.circle-1 {
    width: 100%;
    height: 100%;
    border-color: var(--color-ocean-blue);
    animation: pulse 4s ease-in-out infinite;
}

.circle-2 {
    width: 75%;
    height: 75%;
    top: 12.5%;
    left: 12.5%;
    border-color: var(--color-bright-blue);
    animation: pulse 4s ease-in-out infinite 1s;
}

.circle-3 {
    width: 50%;
    height: 50%;
    top: 25%;
    left: 25%;
    border-color: var(--color-sky-blue);
    animation: pulse 4s ease-in-out infinite 2s;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.5;
    }
}

.about-icon-group {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.about-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-ocean-blue);
}

.about-icon-item i {
    font-size: 32px;
    color: var(--color-bright-blue);
}

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

.about-table tr {
    border-bottom: 1px solid #E5E5E5;
}

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

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

.about-table th {
    font-weight: 600;
    color: var(--color-ocean-blue);
    width: 150px;
    padding-right: var(--spacing-md);
}

.about-table td {
    color: var(--color-text-dark);
    line-height: 1.8;
}

.about-link {
    color: var(--color-ocean-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.about-link:hover {
    color: var(--color-bright-blue);
    text-decoration: underline;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    position: relative;
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-ocean);
    overflow: hidden;
}

.contact-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.contact-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120'%3E%3Cpath d='M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V120H1200V3C1132.19,26.09,1055.71,18.48,985.66,92.83,906.67,72,823.78,31,743.84,13.61,661.58-3.73,575.78-2.72,493.39,14,435.55,25.79,379.39,45.13,321.39,56.44Z' fill='white' fill-opacity='0.05'/%3E%3C/svg%3E");
    background-size: 50% 100%;
    animation: wave 20s linear infinite;
    opacity: 0.3;
}

.contact-content {
    position: relative;
    z-index: 10;
}

.contact-cta {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.btn-contact {
    background: var(--color-white);
    color: var(--color-ocean-blue);
    font-size: 18px;
    padding: 20px 48px;
    box-shadow: var(--shadow-xl);
}

.btn-contact:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo svg {
    height: 50px;
}

.footer-info {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 15px;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-sky-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        align-items: center;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 32px;
        --spacing-xl: 48px;
        --spacing-xxl: 64px;
    }
    
    .nav-list {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .business-card {
        padding: var(--spacing-md);
    }
    
    .about-table th {
        width: 100px;
        font-size: 14px;
    }
    
    .about-table td {
        font-size: 14px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .business-card-title {
        font-size: 22px;
    }
    
    .about-decoration {
        max-width: 250px;
    }
    
    .about-icon-item i {
        font-size: 24px;
    }
}