/* 基本スタイル */
body {
    font-family: 'Helvetica Neue', 'Arial', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    width: 85%;
    margin: auto;
    overflow: hidden;
}

h1, h2, h3 {
    color: #333;
}

/* ヘッダー */
header {
    background: #333;
    color: #fff;
    padding-top: 30px;
    min-height: 70px;
    border-bottom: #0779e4 3px solid;
}

header .logo {
    float: left;
    margin: 0;
}

header nav {
    float: right;
    margin-top: 10px;
}

header ul {
    margin: 0;
    padding: 0;
}

header li {
    display: inline;
    padding: 0 20px 0 20px;
}

header a {
    color: #fff;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 16px;
}

/* ヒーローセクション */
#hero {
    min-height: 200px;
    background: #0779e4;
    color: #fff;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

#hero h2 {
    color: #fff;
    font-size: 32px;
}

/* ツール一覧 */
#tools-list {
    padding: 30px 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.tool-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.tool-card img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

.btn {
    display: inline-block;
    background: #0779e4;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 10px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background: #045aab;
}


/* フッター */
footer {
    padding: 20px;
    margin-top: 20px;
    color: #fff;
    background-color: #333;
    text-align: center;
}