/* リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基本スタイル */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #FFF8F0 0%, #FFE4CC 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* ヘッダー */
header {
    background: linear-gradient(135deg, #FF8C42 0%, #FF6B35 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

/* ナビゲーション */
nav {
    background: #f8f9fa;
    padding: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    border-bottom: 2px solid #e9ecef;
}

nav a {
    color: #FF6B35;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s;
}

nav a:hover {
    background: #FF6B35;
    color: white;
}

/* コンテンツ */
.content, .app-info {
    padding: 40px 30px;
}

h2 {
    color: #FF6B35;
    font-size: 1.8em;
    margin: 30px 0 15px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid #FFE4CC;
}

h3 {
    color: #FF8C42;
    font-size: 1.4em;
    margin: 20px 0 10px 0;
}

p {
    margin-bottom: 15px;
    text-align: justify;
}

ul, ol {
    margin: 15px 0 15px 30px;
}

li {
    margin-bottom: 8px;
}

a {
    color: #FF6B35;
    text-decoration: underline;
}

a:hover {
    color: #FF8C42;
}

/* FAQ */
.faq-item {
    background: #f8f9fa;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    border-left: 4px solid #FF6B35;
}

.faq-item h3 {
    color: #333;
    margin-top: 0;
    margin-bottom: 10px;
}

.faq-item p {
    margin-bottom: 10px;
}

/* フッター */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 30px;
    margin-top: 40px;
}

footer a {
    color: #FFE4CC;
}

/* レスポンシブ */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 2em;
    }

    .content, .app-info {
        padding: 30px 20px;
    }

    h2 {
        font-size: 1.5em;
    }

    h3 {
        font-size: 1.2em;
    }

    nav {
        flex-direction: column;
        gap: 10px;
    }

    nav a {
        display: block;
        text-align: center;
    }
}