/* ベース */
body {
    font-family: 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background: #000;
    color: #fff;
}

/* ヘッダー */
header {
    background: #111;
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    flex-wrap: wrap;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    color: #3a7bd5;
}

/* 言語切替ボタン */
.lang-switch button {
    background: #333;
    color: #fff;
    border: none;
    padding: 0.3rem 0.8rem;
    margin-left: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
}

.lang-switch button:hover {
    background: #555;
}

/* ヒーローセクション */
#hero {
    text-align: center;
    padding: 6rem 1rem;
    background: linear-gradient(to right, #3a7bd5, #3a6073);
}

#hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

#hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

#hero button {
    padding: 0.8rem 1.5rem;
    border: none;
    background: #fff;
    color: #3a6073;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.3s;
}

#hero button:hover {
    background: #ddd;
}

/* セクション共通 */
section {
    padding: 3rem 1rem;
    max-width: 900px;
    margin: 0 auto;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Featuresリスト */
#features ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

#features li {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* Appリンク */
#download {
    text-align: center;
    background: #111;
    padding: 3rem 1rem;
}

.app-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.app-links a {
    text-decoration: none;
    color: #fff;
    transition: transform 0.2s;
    text-align: center;
    width: 160px;
}

.app-links a:hover {
    transform: scale(1.05);
}

/* アプリのアイコン */
.app-icon {
    width: 80px;
    height: 80px;
    border-radius: 20%;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}


/* フッター */
footer {
    text-align: center;
    padding: 1rem;
    background: #111;
    color: #888;
    font-size: 0.9rem;
}