/* リセット & 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --bg-light: #f8f9fa;
    --bg-dark: #343a40;
    --text-dark: #333;
    --text-light: #fff;
    --border-color: #dee2e6;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    background: #fff;
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo h1 {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 700;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* ヒーローセクション */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 150px 0 100px;
    position: relative;
    overflow: hidden;
    margin-top: 70px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-bg.jpg') center/cover;
    opacity: 0.2;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--text-light);
}

.hero-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* ボタン */
.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-color);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    display: inline-block;
    padding: 15px 40px;
    background: transparent;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid var(--text-light);
}

.btn-secondary:hover {
    background: var(--text-light);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-block;
    padding: 12px 30px;
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

/* セクションタイトル */
.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 50px;
    font-size: 18px;
}

/* サービス概要 */
.services-summary {
    padding: 100px 0;
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.service-icon {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* 会社概要セクション */
.about-summary {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--secondary-color);
    line-height: 1.8;
}

.about-image .image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--bg-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.placeholder-content {
    text-align: center;
    color: var(--secondary-color);
}

.placeholder-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

/* 実績セクション */
.achievements {
    padding: 80px 0;
    background: var(--primary-color);
    color: var(--text-light);
}

.achievements .section-title {
    color: var(--text-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

/* CTAセクション */
.cta-section {
    padding: 80px 0;
    text-align: center;
    background: var(--bg-light);
}

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.cta-section p {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 30px;
}

/* フッター */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.footer-info p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-links h4,
.footer-sns h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.sns-icons {
    display: flex;
    gap: 15px;
}

.sns-icon {
    color: var(--text-light);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.sns-icon:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.6;
}

/* ページヘッダー（サブページ用） */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 150px 0 80px;
    text-align: center;
    color: var(--text-light);
    margin-top: 70px;
}

.page-header h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 20px;
    opacity: 0.9;
}

/* コンテンツセクション */
.content-section {
    padding: 80px 0;
}

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

/* タイムライン（Aboutページ用） */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 50px;
    position: relative;
}

.timeline-year {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.timeline-content {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-left: 30px;
    flex: 1;
}

.timeline-content h3 {
    margin-bottom: 10px;
    color: var(--text-dark);
}

/* サービス詳細（Servicesページ用） */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
}

.service-detail.reverse {
    direction: rtl;
}

.service-detail.reverse > * {
    direction: ltr;
}

.service-detail-content h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.service-detail-content p {
    color: var(--secondary-color);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-detail-content ul {
    list-style: none;
}

.service-detail-content li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--secondary-color);
}

.service-detail-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
}

.service-detail-image .image-placeholder {
    width: 100%;
    height: 300px;
    background: var(--bg-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

/* お問い合わせフォーム（Contactページ用） */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 50px;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-info {
    padding: 40px;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
}

.info-icon {
    font-size: 24px;
    margin-right: 15px;
    min-width: 40px;
}

.info-item h4 {
    margin-bottom: 5px;
    color: var(--text-dark);
}

.info-item p {
    color: var(--secondary-color);
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    
    .nav.active ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-content h2 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .service-detail {
        grid-template-columns: 1fr;
    }
    
    .service-detail.reverse {
        direction: ltr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 50px;
    }
    
    .timeline-content {
        margin-left: 0;
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .stat-number {
        font-size: 36px;
    }
}