/* 基本設定 */
:root {
    --primary-color: #0a2d4d; /* 濃い紺色 */
    --secondary-color: #1a73e8; /* 明るい青 */
    --accent-color: #f0c419; /* アクセントの黄色 */
    --text-color: #333;
    --background-color: #ffffff;
    --light-gray: #f8f9fa;
    --border-color: #dee2e6;
    --font-family: 'Noto Sans JP', sans-serif;
}

body {
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: var(--text-color);
    line-height: 1.8;
    background-color: var(--background-color);
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    background-color: var(--background-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

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

.header__logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.header__nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.header__nav li {
    margin-left: 35px;
}

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

.header__nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    transition: width 0.3s ease;
}

.header__nav a:hover, .header__nav a.active {
    color: var(--secondary-color);
}

.header__nav a:hover::after, .header__nav a.active::after {
    width: 100%;
}

.header__nav .contact-button a {
    background-color: var(--secondary-color);
    color: #fff;
    padding: 10px 25px;
    border-radius: 25px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.header__nav .contact-button a:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    color: #fff;
}

.header__nav .contact-button a::after {
    display: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 30px;
    color: var(--primary-color);
    cursor: pointer;
}

/* ヒーローセクション */
.hero {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    text-align: center;
    padding: 120px 20px;
}

.hero__title {
    font-size: 52px;
    font-weight: 700;
    margin: 0 0 20px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

.hero__text {
    font-size: 18px;
    font-weight: 400;
    margin: 0 auto 40px;
    max-width: 650px;
    opacity: 0.9;
}

.hero__button a {
    background-color: var(--background-color);
    color: var(--secondary-color);
    padding: 18px 35px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    border: 2px solid var(--background-color);
    transition: all 0.3s ease;
}

.hero__button a:hover {
    background-color: transparent;
    color: var(--background-color);
}

/* 共通セクションスタイル */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 60px;
    text-align: center;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
}


/* UGATTAの強みセクション */
.features {
    background-color: var(--light-gray);
}

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

.feature-card {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.1);
}

.feature-card__icon img {
    width: 60px;
    height: auto;
    margin-bottom: 20px;
    filter: grayscale(100%) contrast(1) brightness(1.5);
    transition: filter 0.3s ease;
}

.feature-card:hover .feature-card__icon img {
    filter: none;
}

.feature-card__title {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 15px;
    color: var(--primary-color);
}

.feature-card__title span {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.feature-card__text {
    font-size: 15px;
    color: #666;
}

/* お問い合わせセクション */
.contact {
    text-align: center;
}

.contact__title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.contact__text {
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 16px;
}

.contact__button a {
    background-color: var(--secondary-color);
    color: #fff;
    padding: 18px 40px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(26, 115, 232, 0.3);
}

.contact__button a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(10, 45, 77, 0.4);
}

/* フッター */
footer {
    background-color: var(--primary-color);
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

footer nav ul {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

footer nav li {
    margin: 0 15px;
}

footer nav a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

footer nav a:hover {
    opacity: 1;
}

footer p {
    margin: 0;
    font-size: 14px;
    opacity: 0.6;
}

/* サブページ共通 */
.page-header {
    background-color: var(--light-gray);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    color: var(--primary-color);
    margin: 0;
}

/* 会社概要ページ */
.about-content {
    padding: 80px 0;
}
.about-section {
    margin-bottom: 50px;
}
.about-section h2 {
    font-size: 28px;
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.company-info {
    width: 100%;
    border-collapse: collapse;
}
.company-info th, .company-info td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}
.company-info th {
    width: 25%;
    background-color: var(--light-gray);
    font-weight: 700;
}
.company-info ul {
    margin: 0;
    padding-left: 20px;
}

/* 事業内容ページ */
.service-list {
    padding: 80px 0;
}
.service-item {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 50px;
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.service-item:nth-child(even) {
    flex-direction: row-reverse;
}
.service-item img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--secondary-color);
}
.service-content h2 {
    font-size: 24px;
    color: var(--primary-color);
    margin: 0 0 10px;
}

/* 実績紹介ページ */
.portfolio-grid {
    padding: 80px 0;
}
.portfolio-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.portfolio-item img {
    width: 100%;
    display: block;
}
.portfolio-content {
    padding: 25px;
}
.portfolio-content h3 {
    margin: 0;
    font-size: 20px;
    color: var(--primary-color);
}

/* お問い合わせページ */
.contact-form-section {
    padding: 80px 0;
    text-align: center;
}
.center-text {
    text-align: center;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 30px;
}
.btn {
    background-color: var(--secondary-color);
    color: #fff;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    transition: all 0.3s ease;
    display: inline-block;
}
.btn:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .header__nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--background-color);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        flex-direction: column;
        padding: 10px 0;
    }

    .header__nav.active {
        display: flex;
    }

    .header__nav ul {
        flex-direction: column;
        width: 100%;
    }

    .header__nav li {
        margin: 0;
        width: 100%;
        text-align: center;
    }

    .header__nav a {
        padding: 15px 0;
        display: block;
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }
    
    .header__nav a::after {
        display: none;
    }

    .header__nav .contact-button {
        padding: 15px;
    }
    
    .header__nav .contact-button a {
        padding: 12px 20px;
    }

    .menu-toggle {
        display: block;
    }

    .hero__title {
        font-size: 36px;
    }

    .hero__text {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .service-item, .service-item:nth-child(even) {
        flex-direction: column;
        text-align: center;
    }
}