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

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* ヘッダー */
header {
    background: #000;
    color: #fff;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    letter-spacing: 2px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
}

/* ヒーローセクション */
.hero {
    position: relative;
    height: 80vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #000;
}

.hero-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
}

.hero-text {
    position: relative;
    text-align: center;
    color: #fff;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #fff;
    color: #000;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: 0.3s;
}

.btn:hover {
    background: #ccc;
}

/* グリッドレイアウト */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 60px 0;
}

.card {
    background: #f9f9f9;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card img {
    width: 100%;
    height: auto;
    display: block;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    margin-bottom: 10px;
}

/* フッター */
footer {
    text-align: center;
    padding: 40px 0;
    background: #111;
    color: #888;
    font-size: 12px;
}