/* 基本設定 */
:root {
    --main-color: #2ecc71; /* ロゴの緑をイメージ */
    --text-color: #333;
    --light-bg-color: #f7f9fc;
    --dark-bg-color: #2c3e50;
    --white-color: #ffffff;
    --font-jp: 'Noto Sans JP', sans-serif;
    --font-en: 'Roboto', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-jp);
    color: var(--text-color);
    line-height: 1.8;
    background-color: var(--white-color);
}

.container {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
}

/* ヘッダー */
.header {
    background-color: var(--white-color);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-en);
    font-weight: 700;
    font-size: 24px;
    letter-spacing: 2px;
    color: var(--text-color);
}

.header nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 30px;
}

.header nav a {
    text-decoration: none;
    font-family: var(--font-en);
    color: var(--text-color);
    font-weight: 700;
    font-size: 14px;
    transition: color 0.3s;
}

.header nav a:hover {
    color: var(--main-color);
}


/* メインビジュアル */
.hero {
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--light-bg-color);
    padding-top: 80px; /* ヘッダーの高さ分 */
}

.hero h1 {
    font-size: 2.5rem;
    line-height: 1.4;
    margin: 0 0 20px;
}

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

.section-title {
    font-family: var(--font-en);
    font-size: 2rem;
    text-align: center;
    margin: 0 0 40px;
    letter-spacing: 2px;
    color: var(--main-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.5rem;
    margin: -20px 0 40px;
}

/* ABOUT */
#about p {
    max-width: 800px;
    margin: 0 auto;
}

/* SERVICE */
.bg-light {
    background-color: var(--light-bg-color);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.service-item {
    background-color: var(--white-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.service-item h4 {
    margin: 0 0 15px;
    font-size: 1.2rem;
    color: var(--main-color);
}

.tech-box {
    text-align: center;
    padding: 20px;
    background-color: #e9ecef;
    border-radius: 8px;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* FEATURES */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    text-align: center;
}

.feature-item .feature-number {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 700;
    color: var(--main-color);
    line-height: 1;
}

.feature-item h4 {
    font-size: 1.2rem;
    margin: 10px 0 15px;
}

/* CONTACT */
.bg-dark {
    background-color: var(--dark-bg-color);
    color: var(--white-color);
}

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

.contact-lead {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
}

.form-group .required {
    background-color: var(--main-color);
    color: var(--white-color);
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 1rem;
    font-family: var(--font-jp);
}

.submit-btn {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 20px auto 0;
    padding: 15px;
    background-color: var(--main-color);
    color: var(--white-color);
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

.submit-btn:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
}


/* フッター */
.footer {
    background-color: #34495e;
    color: var(--white-color);
    text-align: center;
    padding: 30px 0;
}

.footer .logo {
    color: var(--white-color);
    margin-bottom: 10px;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .header-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .header nav ul {
        gap: 20px;
    }

    .service-grid, .features-grid {
        grid-template-columns: 1fr;
    }

    .content-section {
        padding: 60px 0;
    }
}
/* CONTACTセクションのボタン (追記) */
.contact-button-wrapper {
    text-align: center;
    margin-top: 40px;
}

.action-btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--main-color);
    color: var(--white-color);
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.3s;
}

.action-btn:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
}