/* =========================================
   PartsLoad - メインスタイル v3
   ライトグレー系・赤アクセント
========================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:       #f5f5f5;
  --color-surface:  #ffffff;
  --color-surface2: #eeeeee;
  --color-border:   #e0e0e0;
  --color-accent:   #cc0000;
  --color-accent2:  #ee0000;
  --color-text:     #1a1a1a;
  --color-muted:    #777777;
  --color-white:    #ffffff;
  --color-header:   #1a1a1a;
  --font-main:      'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --radius:         4px;
  --max-width:      1100px;
  --content-width:  760px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent2); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* =========================================
   ヘッダー（ダーク維持）
========================================= */
.site-header {
  background: var(--color-header);
  border-bottom: 2px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}

.logo span { color: var(--color-accent); }

.global-nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
}

.global-nav a {
  color: #aaaaaa;
  font-size: .82rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-weight: 500;
  transition: color .2s;
}

.global-nav a:hover { color: #ffffff; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* =========================================
   ヒーロー
========================================= */
.hero {
  position: relative;
  background-image: url('/img/top.jpg');
  background-size: cover;
  background-position: center 40%;
  padding: 80px 20px;
  text-align: left;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}

.hero .inner { position: relative; z-index: 1; }

.hero-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
  display: block;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: .02em;
  line-height: 1.3;
  max-width: 700px;
}

.hero p {
  color: rgba(255,255,255,0.8);
  font-size: .95rem;
  max-width: 500px;
}

/* =========================================
   カテゴリナビ（テキストリンクのみ・ラベルなし）
========================================= */
.cat-nav {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.cat-nav .inner {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-nav-link {
  font-size: .82rem;
  color: var(--color-text);
  letter-spacing: .04em;
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: all .2s;
  white-space: nowrap;
  background: var(--color-bg);
}

.cat-nav-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: #fff;
}

/* =========================================
   記事グリッド
========================================= */
.section { padding: 40px 0; }

.section-title {
  font-size: .78rem;
  font-weight: 700;
  color: var(--color-muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
  margin-bottom: 24px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
  display: block;
}

.article-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transform: translateY(-2px);
  text-decoration: none;
}

.article-card .thumb {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-card .thumb-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.article-card .card-body { padding: 14px 16px; }

.article-card .card-cat {
  font-size: .68rem;
  color: var(--color-accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 6px;
}

.article-card .card-title {
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

/* =========================================
   カテゴリトップ
========================================= */
.cat-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0 30px;
}

.cat-header .cat-label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.cat-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.cat-header .cat-desc {
  color: var(--color-muted);
  font-size: .9rem;
  max-width: 600px;
}

/* =========================================
   記事個別ページ
========================================= */
.article-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 40px 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-meta .meta-cat {
  font-size: .72rem;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 10px;
  border-radius: 2px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.article-title {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 28px;
}

.article-eyecatch {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 32px;
}

/* 本文スタイル */
.article-body { color: var(--color-text); line-height: 1.9; }

.article-body h2 {
  font-size: 1.25rem;
  color: var(--color-text);
  border-left: 4px solid var(--color-accent);
  padding-left: 14px;
  margin: 40px 0 16px;
  font-weight: 700;
}

.article-body h3 {
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-body p { margin-bottom: 16px; }
.article-body ul, .article-body ol { margin: 12px 0 16px 24px; }
.article-body li { margin-bottom: 6px; }
.article-body strong { color: var(--color-text); font-weight: 700; }
.article-body a { color: var(--color-accent); }
.article-body a:hover { color: var(--color-accent2); }

.article-body img {
  border-radius: var(--radius);
  margin: 20px 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: .88rem;
}

.article-body th, .article-body td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: var(--color-surface2);
  color: var(--color-text);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .04em;
}

.article-body td { background: var(--color-surface); }

/* パンくず */
.breadcrumb {
  font-size: .75rem;
  color: var(--color-muted);
  padding: 14px 0;
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb span { margin: 0 6px; }

/* ページネーション */
.pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  padding: 40px 0;
}

.pagination a, .pagination span {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .82rem;
  color: var(--color-text);
  background: var(--color-surface);
}

.pagination a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination .current { border-color: var(--color-accent); color: var(--color-accent); background: #fff0f0; }

/* =========================================
   フッター
========================================= */
.site-footer {
  background: var(--color-header);
  border-top: 2px solid var(--color-accent);
  padding: 30px 0;
  margin-top: 60px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 16px;
}

.footer-nav a {
  font-size: .78rem;
  color: #aaaaaa;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.footer-nav a:hover { color: #ffffff; }
.copyright { font-size: .75rem; color: #666; }

/* =========================================
   レスポンシブ
========================================= */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .global-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-header);
    border-bottom: 1px solid #333;
    padding: 16px 20px;
    z-index: 99;
  }
  .global-nav.open { display: block; }
  .global-nav ul { flex-direction: column; gap: 14px; }

  .hero { padding: 60px 20px; }
  .hero h1 { font-size: 1.4rem; }
  .article-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .article-title { font-size: 1.3rem; }
}

@media (max-width: 480px) {
  .article-grid { grid-template-columns: 1fr; }
  .article-wrap { padding: 24px 16px; }
  .cat-nav .inner { gap: 6px; }
}