/* ===================================
   CSS Variables
   =================================== */
:root {
    --color-white: #FFFFFF;
    --color-off-white: #F9FAFB;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-main: #1A2B48;
    --color-accent: #007BFF;
    --color-accent-hover: #0056b3;
    --color-border: #E5E7EB;
    --color-shadow: rgba(0, 0, 0, 0.1);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --header-height: 80px;
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-main);
    letter-spacing: 0.05em;
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 0.5rem 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--color-accent);
}

/* ハンバーガーメニュー */
.js-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.js-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-main);
    transition: var(--transition);
    border-radius: 2px;
}

.js-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* ===================================
   Home Section
   =================================== */
.home-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 50%, #f0f4ff 100%);
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--header-height);
    position: relative;
    overflow: hidden;
}

/* 背景装飾：大きな円形グラデーション */
.home-section::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -15%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 123, 255, 0.08) 0%, rgba(0, 123, 255, 0.02) 40%, transparent 70%);
    border-radius: 50%;
    animation: floatAnimation 20s ease-in-out infinite;
}

/* 背景装飾：左下の円形 */
.home-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(26, 43, 72, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    animation: floatAnimation 25s ease-in-out infinite reverse;
}

@keyframes floatAnimation {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(30px, -30px) scale(1.05);
    }
}

.home-content {
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease;
    max-width: 1000px;
    margin: 0 auto;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.home-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    letter-spacing: 0.02em;
    position: relative;
    display: inline-block;
}

.home-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    border-radius: 2px;
}

.home-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    margin-top: calc(var(--spacing-md) + 10px);
    line-height: 1.9;
    font-weight: 400;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 1.2rem 3.5rem;
    background: linear-gradient(135deg, var(--color-accent) 0%, #0056b3 100%);
    color: var(--color-white);
    font-weight: 600;
    border-radius: 50px;
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.35);
    transition: var(--transition);
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    background: linear-gradient(135deg, #0056b3 0%, var(--color-accent) 100%);
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0, 123, 255, 0.45);
}

.cta-button::after {
    content: '→';
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.cta-button:hover::after {
    transform: translateX(5px);
}

/* 幾何学的な装飾図形 */
.geometric-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.4;
    animation: morphShape 15s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), rgba(0, 86, 179, 0.05));
    top: 10%;
    right: 5%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: linear-gradient(225deg, rgba(26, 43, 72, 0.08), rgba(26, 43, 72, 0.03));
    bottom: 15%;
    left: 8%;
    animation-delay: 2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: linear-gradient(315deg, rgba(0, 123, 255, 0.12), rgba(0, 123, 255, 0.04));
    top: 50%;
    left: 15%;
    animation-delay: 4s;
}

.shape-4 {
    width: 250px;
    height: 250px;
    background: linear-gradient(45deg, rgba(0, 86, 179, 0.08), rgba(0, 123, 255, 0.03));
    bottom: 10%;
    right: 10%;
    animation-delay: 6s;
}

@keyframes morphShape {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
        transform: rotate(0deg) scale(1);
    }
    25% {
        border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
        transform: rotate(90deg) scale(1.1);
    }
    50% {
        border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
        transform: rotate(180deg) scale(0.9);
    }
    75% {
        border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
        transform: rotate(270deg) scale(1.05);
    }
}

/* ホームバッジ */
.badge-container {
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.2s backwards;
}

.home-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), rgba(0, 86, 179, 0.15));
    border: 1px solid rgba(0, 123, 255, 0.3);
    color: var(--color-accent);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    backdrop-filter: blur(10px);
}

/* ホーム特徴アイコン */
.home-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(0, 123, 255, 0.1);
    transition: var(--transition);
    min-width: 140px;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 123, 255, 0.3);
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.15);
}

.feature-item svg {
    color: var(--color-accent);
    stroke-width: 2.5;
}

.feature-item span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-main);
    text-align: center;
}

/* ===================================
   Section Common Styles
   =================================== */
.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-main);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.1em;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
}

/* ===================================
   Services Section
   =================================== */
.services-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-main) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

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

.service-card.featured {
    background: linear-gradient(135deg, #007BFF 0%, #0056b3 100%);
    color: var(--color-white);
    border: none;
    transform: scale(1.05);
}

.service-card.featured:hover {
    transform: scale(1.08) translateY(-5px);
}

.service-card.featured .service-title,
.service-card.featured .service-description {
    color: var(--color-white);
}

.service-card.featured .service-icon svg {
    stroke: var(--color-white);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    padding: 5px 40px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    transform: rotate(45deg);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.service-card.featured .service-icon {
    color: var(--color-white);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.service-description {
    color: var(--color-text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ===================================
   About Section
   =================================== */
.about-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-off-white);
}

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

.company-info {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--color-shadow);
}

.info-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.info-row dt {
    font-weight: 700;
    color: var(--color-main);
}

.info-row dd {
    color: var(--color-text);
}

.info-row dd a {
    color: var(--color-accent);
    text-decoration: underline;
}

.info-row dd a:hover {
    color: var(--color-accent-hover);
}

.business-list {
    padding-left: var(--spacing-md);
}

.business-list li {
    position: relative;
    padding-left: var(--spacing-sm);
    margin-bottom: 0.5rem;
}

.business-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.about-map {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px var(--color-shadow);
    height: 100%;
    min-height: 400px;
}

.about-map iframe {
    width: 100%;
    height: 100%;
    display: block;
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-white);
}

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

.contact-text {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1.2rem 3rem;
    background-color: var(--color-accent);
    color: var(--color-white);
    font-size: 1.2rem;
    font-weight: 500;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transition: var(--transition);
    margin-bottom: var(--spacing-md);
}

.contact-button:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.contact-button svg {
    width: 24px;
    height: 24px;
}

.contact-info {
    margin-top: var(--spacing-md);
}

.contact-info p {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 1rem;
}

.contact-info svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-accent);
}

.contact-info a {
    color: var(--color-accent);
    text-decoration: underline;
}

.contact-info a:hover {
    color: var(--color-accent-hover);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    font-weight: 300;
}

.footer-nav h4,
.footer-info h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    font-weight: 600;
}

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

.footer-nav a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

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

.footer-info p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-info a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet (768px以下) */
@media (max-width: 768px) {
    :root {
        --header-height: 70px;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .js-menu-toggle {
        display: flex;
    }
    
    .nav-list {
        position: fixed;
        top: var(--header-height);
        right: 0;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-md);
        box-shadow: -5px 0 15px var(--color-shadow);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        align-items: flex-start;
    }
    
    .nav-list.active {
        transform: translateX(0);
    }
    
    .pc-only {
        display: none;
    }
    
    /* ホームセクション - タブレット */
    .shape {
        display: none;
    }
    
    .home-features {
        gap: var(--spacing-md);
    }
    
    .feature-item {
        min-width: 120px;
        padding: var(--spacing-sm);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .info-row {
        grid-template-columns: 100px 1fr;
        gap: var(--spacing-sm);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card.featured {
        transform: scale(1);
    }
    
    .service-card.featured:hover {
        transform: translateY(-5px);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Mobile (480px以下) */
@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }
    
    .home-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .home-title br {
        display: none;
    }
    
    .home-badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }
    
    .home-features {
        gap: var(--spacing-sm);
        margin-top: var(--spacing-lg);
    }
    
    .feature-item {
        min-width: 100px;
        padding: 0.75rem;
    }
    
    .feature-item span {
        font-size: 0.75rem;
    }
    
    .feature-item svg {
        width: 20px;
        height: 20px;
    }
    
    .cta-button {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }
    
    .info-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .info-row dt {
        margin-bottom: 0.25rem;
    }
    
    .contact-button {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    .service-card {
        padding: var(--spacing-md);
    }
    
    .about-map {
        min-height: 300px;
    }
}

/* Large Screens (1400px以上) */
@media (min-width: 1400px) {
    .container,
    .header-container {
        max-width: 1400px;
    }
}