/* ================================================
   CSS Variables - Color Palette
   ================================================ */
:root {
    /* Brand Colors (Purple) */
    --color-purple-dark: #2F195C;
    --color-purple-medium-dark: #4C3B84;
    --color-purple-medium: #6A5DAC;
    --color-purple-light: #867BCD;
    --color-purple-extra-light: #A69AE7;
    
    /* Sub Colors (Teal) */
    --color-teal-dark: #016364;
    --color-teal-medium-dark: #01969A;
    --color-teal-medium: #02C1C4;
    --color-teal-light: #88E3E5;
    --color-teal-extra-light: #C0F6F7;
    
    /* Accent Colors (Red/Coral) */
    --color-red-dark: #B12F2E;
    --color-red-bright: #F03832;
    --color-coral: #FF6156;
    --color-coral-light: #FFA39C;
    --color-coral-extra-light: #FFD2CD;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-gray-light: #F8F9FA;
    --color-gray-medium: #E9ECEF;
    --color-gray: #ADB5BD;
    --color-gray-dark: #495057;
    --color-black: #212529;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-xxl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(47, 25, 92, 0.05);
    --shadow-md: 0 4px 12px rgba(47, 25, 92, 0.08);
    --shadow-lg: 0 8px 24px rgba(47, 25, 92, 0.12);
    --shadow-xl: 0 16px 48px rgba(47, 25, 92, 0.15);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
    overflow-y: auto;
    position: relative;
}

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

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

ul {
    list-style: none;
}

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

/* ================================================
   Header & Navigation
   ================================================ */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

#header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    font-family: var(--font-secondary);
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-menu li a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-gray-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-menu li a:hover {
    color: var(--color-purple-medium);
    background-color: var(--color-purple-extra-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-purple-dark);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ================================================
   Hero Section
   ================================================ */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-purple-dark) 0%, var(--color-purple-medium) 50%, var(--color-teal-medium-dark) 100%);
    color: var(--color-white);
    padding-top: 0;
    margin-bottom: 0;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(2, 193, 196, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 97, 86, 0.15) 0%, transparent 50%);
    animation: gradient-shift 15s ease infinite;
    z-index: 0;
}

@keyframes gradient-shift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-md);
}

.hero-title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.02em;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    animation: fadeIn 0.8s ease 0.6s forwards;
    font-weight: 400;
    letter-spacing: 0.05em;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeIn 0.8s ease 0.8s forwards;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-purple-dark);
}

.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);
    opacity: 0.8;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator span {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.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 {
    padding: var(--spacing-lg) 0 var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-purple-dark);
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-teal-medium);
    text-transform: uppercase;
    letter-spacing: 0.3em;
}

/* ================================================
   Business Section
   ================================================ */
.business-section {
    background-color: var(--color-gray-light);
    position: relative;
    z-index: 10;
}

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

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

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-purple-medium), var(--color-teal-medium));
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.business-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    color: var(--color-purple-medium);
}

.business-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    margin-bottom: var(--spacing-sm);
}

.business-card p {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.business-features {
    list-style: none;
    padding: 0;
}

.business-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-dark);
    position: relative;
    padding-left: var(--spacing-md);
}

.business-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-teal-medium);
    font-weight: 700;
}

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

.company-info-grid {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.info-row {
    display: grid;
    grid-template-columns: 200px 1fr;
    border-bottom: 1px solid var(--color-gray-medium);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    background-color: var(--color-gray-light);
    padding: var(--spacing-md);
    font-weight: 600;
    color: var(--color-purple-dark);
    display: flex;
    align-items: center;
}

.info-value {
    padding: var(--spacing-md);
    color: var(--color-gray-dark);
    display: flex;
    align-items: center;
}

/* ================================================
   Contact Section
   ================================================ */
.contact-section {
    background: linear-gradient(135deg, var(--color-purple-dark) 0%, var(--color-purple-medium) 100%);
    color: var(--color-white);
}

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

.contact-section .section-subtitle {
    color: var(--color-teal-light);
}

.contact-text {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 2;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.contact-item {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    color: var(--color-teal-light);
}

.contact-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-details a {
    font-size: 1.1rem;
    color: var(--color-white);
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.contact-details a:hover {
    border-bottom-color: var(--color-coral);
}

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

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

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--color-purple-light);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

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

.footer-column a {
    color: var(--color-purple-light);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

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

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--color-purple-light);
}

/* ================================================
   Responsive Design
   ================================================ */
@media (max-width: 768px) {
    /* Navigation */
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu li a {
        display: block;
        padding: var(--spacing-sm);
    }
    
    /* Hero Section */
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    /* Info Grid */
    .info-row {
        grid-template-columns: 1fr;
    }
    
    .info-label {
        border-bottom: 1px solid var(--color-gray-medium);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    /* Sections */
    section {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}