/* --- いま風モダンデザインCSS --- */
:root {
    --primary-color: #3b82f6; /* 爽やかな青 */
    --text-color: #1f2937;    /* 読みやすいダークグレー子 */
    --bg-color: #f9fafb;      /* ほんのり明るい背景 */
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.7;
    margin: 0;
    padding: 0;
}

/* ヘッダー */
header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

header h1 {
    font-size: 1.25rem;
    margin: 0;
}

header h1 a {
    color: var(--text-color);
    text-decoration: none;
}

nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-left: 1rem;
}

nav a:hover {
    text-decoration: underline;
}

/* メインコンテンツエリア */
main {
    max-width: 720px;
    margin: 2.5rem auto;
    padding: 0 1.5rem;
}

article {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
    margin-bottom: 2rem;
}

article h2 {
    font-size: 1.75rem;
    margin-top: 0;
    color: #111827;
    letter-spacing: -0.025em;
}

article p {
    margin-bottom: 1.25rem;
}

.date {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    display: block;
}

/* ボタンやリンク */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s;
    margin: 1rem 0;
}

.btn:hover {
    background-color: #2563eb;
}

/* 前後の記事ナビゲーション */
.post-nav {
    display: flex;
    justify-content: space-between;
    margin: 2rem 0;
    font-size: 0.95rem;
}

.post-nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.post-nav a:hover {
    text-decoration: underline;
}

/* 関連記事エリア */
.related-posts {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.related-posts h3 {
    font-size: 1.1rem;
    margin-top: 0;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.related-posts ul {
    margin: 0;
    padding-left: 1.2rem;
}

.related-posts li {
    margin-bottom: 0.5rem;
}

.related-posts a {
    color: var(--primary-color);
    text-decoration: none;
}

.related-posts a:hover {
    text-decoration: underline;
}

/* 一覧ページのスタイル */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 18px;
    margin-top: 24px;
}

.app-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px 12px 14px;
    text-decoration: none;
    color: var(--text-color);
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.04);
    transition: .2s ease;
}

.app-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
}

.icon-img {
    width: 52px;
    height: 52px;
    display: block;
    margin: 0 auto 12px;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.title {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.5;
}

/* フッター */
footer {
    text-align: center;
    padding: 2.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    margin-top: 4rem;
}
/* 内部リンクカードのスタイル */
.game-card {
    display: flex;
    gap: 1.5rem;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    margin: 2rem 0;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.game-card img {
    width: 160px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.game-card-info h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
}

.game-card-info p {
    margin: 0 0 0.75rem 0;
    font-size: 0.9rem;
    color: #6b7280;
}

.game-card .btn {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    margin: 0;
}