/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本設定 */
:root {
    --primary-color: #1d1d1f;
    --secondary-color: #ffffff;
    --text-color: #1d1d1f;
    --text-light: #86868b;
    --background-light: #f5f5f7;
    --border-color: #d2d2d7;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.08);
    --accent-blue: #007aff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'SF Pro Display', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--secondary-color);
    -webkit-font-smoothing: antialiased;
    font-weight: 400;
}

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

/* ヘッダー */
.header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 16px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 44px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-image {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
}

.logo-text {
    font-size: 21px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.03em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 17px;
    font-weight: 400;
    letter-spacing: -0.022em;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--text-light);
}

/* ヒーローセクション */
.hero {
    background: var(--secondary-color);
    color: var(--text-color);
    padding: 120px 0 100px;
    text-align: center;
}

.hero-container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
}

.hero-title {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 24px;
    line-height: 1.08;
    letter-spacing: -0.003em;
}

.hero-description {
    font-size: 21px;
    margin-bottom: 40px;
    color: var(--text-light);
    font-weight: 400;
    line-height: 1.4;
    letter-spacing: 0.016em;
}

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

/* ボタン */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 980px;
    text-decoration: none;
    font-weight: 400;
    font-size: 17px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    line-height: 1.2;
    letter-spacing: -0.022em;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--secondary-color);
}

.btn-primary:hover {
    background: #0056cc;
    color: var(--secondary-color);
}

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

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--secondary-color);
}

/* セクション共通 */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 48px;
    text-align: center;
    margin-bottom: 80px;
    color: var(--text-color);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.003em;
}

/* 事業内容セクション */
.services {
    background: var(--background-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.service-card {
    background: var(--secondary-color);
    padding: 60px 40px;
    border-radius: 18px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    font-size: 56px;
    margin-bottom: 32px;
    opacity: 0.8;
}

.service-card h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-color);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.007em;
}

.service-card p {
    color: var(--text-light);
    line-height: 1.5;
    font-size: 17px;
    letter-spacing: -0.022em;
}

/* 会社概要セクション */
.about-content {
    max-width: 980px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 40px;
    margin-bottom: 32px;
    color: var(--text-color);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.005em;
    text-align: center;
}

.about-text p {
    font-size: 21px;
    margin-bottom: 60px;
    color: var(--text-light);
    line-height: 1.4;
    letter-spacing: 0.016em;
    text-align: center;
}

.company-info {
    display: grid;
    gap: 24px;
    max-width: 640px;
    margin: 0 auto;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px;
    background: var(--secondary-color);
    border-radius: 18px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.info-item strong {
    color: var(--text-color);
    font-weight: 600;
    font-size: 17px;
    letter-spacing: -0.022em;
}

.info-item span {
    color: var(--text-light);
    font-size: 17px;
    letter-spacing: -0.022em;
}

/* お問い合わせセクション */
.contact {
    background: var(--background-light);
}

.contact-content {
    max-width: 780px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    font-size: 21px;
    margin-bottom: 60px;
    color: var(--text-light);
    line-height: 1.4;
    letter-spacing: 0.016em;
}

.contact-info {
    display: grid;
    gap: 24px;
    max-width: 640px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px;
    background: var(--secondary-color);
    border-radius: 18px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.contact-item strong {
    color: var(--text-color);
    font-weight: 600;
    font-size: 17px;
    letter-spacing: -0.022em;
}

.contact-item span {
    color: var(--text-light);
    font-size: 17px;
    letter-spacing: -0.022em;
}

/* フッター */
.footer {
    background: var(--background-light);
    color: var(--text-light);
    padding: 60px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo .logo-text {
    color: var(--text-color);
    font-size: 17px;
    font-weight: 600;
}

.footer-text {
    color: var(--text-light);
    font-size: 12px;
    letter-spacing: -0.01em;
}

/* 言語セレクター */
.language-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.language-label {
    color: var(--text-light);
    font-size: 14px;
}

.language-select {
    background: var(--background-light);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-select:hover {
    background: var(--secondary-color);
    border-color: var(--text-light);
}

.language-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2);
}

.language-select option {
    background: var(--secondary-color);
    color: var(--text-color);
}

/* レスポンシブデザイン */
@media (max-width: 834px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
        line-height: 1.1;
    }
    
    .hero-description {
        font-size: 19px;
    }
    
    .section-title {
        font-size: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .service-card {
        padding: 50px 32px;
    }
    
    .service-card h3 {
        font-size: 24px;
    }
    
    .about-text h3 {
        font-size: 32px;
    }
    
    .about-text p {
        font-size: 19px;
    }
    
    .contact-description {
        font-size: 19px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-container {
        padding: 10px 20px;
    }
    
    .hero-container {
        padding: 0 20px;
    }
    
    .hero {
        padding: 80px 0 80px;
    }
    
    .hero-title {
        font-size: 28px;
        margin-bottom: 20px;
    }
    
    .hero-description {
        font-size: 17px;
        margin-bottom: 32px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 32px;
        margin-bottom: 60px;
    }
    
    .service-card {
        padding: 40px 24px;
    }
    
    .service-card h3 {
        font-size: 21px;
    }
    
    .service-card p {
        font-size: 15px;
    }
    
    .about-text h3 {
        font-size: 28px;
    }
    
    .about-text p {
        font-size: 17px;
    }
    
    .contact-description {
        font-size: 17px;
    }
    
    .info-item,
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 12px;
        padding: 24px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .btn {
        font-size: 15px;
        padding: 10px 20px;
    }
}