/* ══════════════════════════════════════════
   cards.css — 記事カードグリッド（エディトリアル・ライトテーマ）
   column/index.html で読み込む
   common.css のダークテーマをこのファイルで上書きする
   ══════════════════════════════════════════ */

/* ── PALETTE OVERRIDES ── */
:root {
  --ed-paper:      #faf7f2;
  --ed-paper-soft: #f3eee5;
  --ed-ink:        #161616;
  --ed-ink-soft:   #2a2a2a;
  --ed-body:       #2d2a25;
  --ed-muted:      #757067;
  --ed-rule:       #d9d2c4;
  --ed-rule-soft:  #ebe4d5;
  --ed-card:       #ffffff;
  --ed-shu:        #c8202c;
  --ed-shu-deep:   #9b1620;
  --ed-shu-tint:   rgba(200,32,44,0.06);
  --ed-gold:       #8c6b29;
}

body {
  background: var(--ed-paper);
  color: var(--ed-body);
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  letter-spacing: 0.02em;
}

/* ── NAV OVERRIDE ── */
body > nav {
  background: rgba(250,247,242,0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ed-rule);
  padding: 14px 32px;
}
.logo {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem; font-weight: 700; letter-spacing: 0.06em;
  color: var(--ed-ink);
}
.logo em { color: var(--ed-shu); font-style: normal; font-weight: 700; }
.nav-link {
  color: var(--ed-ink-soft); font-size: 0.83rem; font-weight: 500;
}
.nav-link:hover { color: var(--ed-shu); }
.nav-cta {
  background: var(--ed-ink); color: var(--ed-paper);
  padding: 9px 18px; border-radius: 2px;
  font-size: 0.83rem; font-weight: 700; letter-spacing: 0.04em;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--ed-shu); opacity: 1; }

@media (max-width: 620px) {
  body > nav { padding: 12px 16px; }
  .nav-toggle span { background: rgba(20,20,20,0.7); }
  .nav-right {
    background: rgba(250,247,242,0.98);
    border-bottom: 1px solid var(--ed-rule);
  }
  .nav-right .nav-link {
    color: var(--ed-ink-soft);
    border-bottom: 1px solid var(--ed-rule);
  }
}

/* ── PAGE HEADER ── */
.page-header {
  padding: 132px 24px 56px;
  background:
    radial-gradient(ellipse 70% 60% at 50% 0%, rgba(200,32,44,0.05), transparent 60%),
    var(--ed-paper);
  border-bottom: 1px solid var(--ed-rule);
  text-align: center;
}
.page-header .label {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem; font-weight: 500; letter-spacing: 0.2em;
  color: var(--ed-shu);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--ed-shu);
}
.page-header h1 {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700; line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--ed-ink);
  margin-bottom: 16px;
}
.page-header p {
  color: var(--ed-ink-soft); font-size: 0.95rem;
  line-height: 2; max-width: 540px;
  margin: 0 auto;
}

/* ── CONTAINER ── */
.container { max-width: 1100px; margin: 0 auto; padding: 64px 28px 80px; }
.container + .container { padding-top: 0; }

/* ── POPULAR ARTICLES ── */
.popular-section {
  background: var(--ed-card);
  border: 1px solid var(--ed-rule);
  border-top: 3px solid var(--ed-shu);
  padding: 30px 32px 22px;
}
.popular-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem; font-weight: 500; letter-spacing: 0.18em;
  color: var(--ed-shu);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.popular-list { display: flex; flex-direction: column; gap: 0; }
.popular-item {
  display: flex; align-items: center; gap: 22px;
  padding: 16px 4px; text-decoration: none;
  border-bottom: 1px solid var(--ed-rule-soft);
  transition: background 0.2s, padding 0.2s;
}
.popular-item:last-child { border-bottom: none; }
.popular-item:hover { background: var(--ed-paper-soft); padding-left: 12px; }
.popular-rank {
  width: 38px; flex-shrink: 0;
  font-family: 'Noto Serif JP', serif;
  font-style: italic;
  font-size: 1.6rem; font-weight: 700;
  line-height: 1; text-align: center;
  color: var(--ed-rule);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ed-rule);
  letter-spacing: -0.02em;
  transition: color 0.2s, border-color 0.2s;
}
.popular-item:nth-child(1) .popular-rank,
.popular-item:nth-child(2) .popular-rank,
.popular-item:nth-child(3) .popular-rank {
  color: var(--ed-shu);
  border-bottom: 1px solid var(--ed-shu);
}
.popular-item:nth-child(1) .popular-rank { font-size: 1.9rem; }
.popular-item:hover .popular-rank {
  color: var(--ed-shu);
  border-bottom-color: var(--ed-shu);
}
.popular-title {
  font-size: 0.92rem;
  color: var(--ed-ink-soft);
  line-height: 1.6;
  font-weight: 500;
  transition: color 0.2s;
}
.popular-item:hover .popular-title { color: var(--ed-shu); }

/* ── CATEGORY FILTER ── */
.cat-filter {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: center;
  margin-bottom: 12px;
}
.cat-btn {
  background: var(--ed-card);
  border: 1px solid var(--ed-rule);
  color: var(--ed-ink-soft);
  font-family: inherit;
  font-size: 0.82rem; font-weight: 500;
  padding: 8px 18px; cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}
.cat-btn:hover {
  border-color: var(--ed-shu);
  color: var(--ed-shu);
  background: var(--ed-shu-tint);
}
.cat-btn.active {
  background: var(--ed-shu);
  border-color: var(--ed-shu);
  color: #fff;
  font-weight: 700;
}

/* ── FILTER COUNT ── */
.filter-count {
  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.76rem; color: var(--ed-muted);
  margin-top: 14px; letter-spacing: 0.06em;
}

/* ── ARTICLE GRID ── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 0;
  border-top: 1px solid var(--ed-rule);
  border-left: 1px solid var(--ed-rule);
  background: var(--ed-card);
  counter-reset: art-num;
}
.article-card {
  background: var(--ed-card);
  border-right: 1px solid var(--ed-rule);
  border-bottom: 1px solid var(--ed-rule);
  text-decoration: none; color: var(--ed-ink);
  display: flex; flex-direction: column;
  transition: background 0.2s;
  overflow: hidden;
  position: relative;
  counter-increment: art-num;
}
.article-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: transparent;
  transition: background 0.3s;
  z-index: 2;
}
.article-card:hover { background: var(--ed-paper-soft); }
.article-card:hover::after { background: var(--ed-shu); }

/* ── CARD THUMB（原稿用紙風＋通し番号＋SVGアイコン） ── */
.card-thumb {
  height: 116px;
  background-color: var(--ed-paper-soft);
  background-image:
    linear-gradient(to right, transparent 0, transparent calc(100% - 1px), var(--ed-rule-soft) calc(100% - 1px)),
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 23px,
      var(--ed-rule-soft) 23px,
      var(--ed-rule-soft) 24px
    );
  border-bottom: 1px solid var(--ed-rule-soft);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
  font-size: 0;            /* 元のemojiを実質非表示（SVG差し替え対応） */
  color: var(--ed-ink-soft);
  transition: background-color 0.3s;
}
.card-thumb::before {
  content: 'No.' counter(art-num, decimal-leading-zero);
  position: absolute; top: 10px; left: 14px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--ed-shu);
  opacity: 0.85;
}
.card-thumb::after {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 32px; height: 32px;
  border-top: 1px solid var(--ed-shu);
  border-left: 1px solid var(--ed-shu);
  opacity: 0.55;
}
.card-thumb svg {
  width: 42px; height: 42px;
  stroke: var(--ed-ink-soft);
  fill: none;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.55;
  transition: stroke 0.3s, opacity 0.3s, transform 0.35s ease;
  z-index: 1;
}
.article-card:hover .card-thumb { background-color: #fff; }
.article-card:hover .card-thumb svg {
  stroke: var(--ed-shu);
  opacity: 1;
  transform: scale(1.08) rotate(-2deg);
}
.card-body {
  padding: 22px 24px 24px;
  flex: 1;
  display: flex; flex-direction: column;
  gap: 10px;
}
.card-meta {
  display: flex; gap: 12px; align-items: center;
  flex-wrap: wrap;
}
.card-cat {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ed-shu);
  border: 1px solid var(--ed-shu);
  padding: 3px 9px;
}
.card-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem; color: var(--ed-muted);
  letter-spacing: 0.04em;
}
.card-title {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem; font-weight: 700;
  line-height: 1.6; letter-spacing: 0.01em;
  color: var(--ed-ink);
}
.card-desc {
  font-size: 0.86rem;
  color: var(--ed-body);
  line-height: 1.85;
  flex: 1;
}
.card-tags {
  display: flex; flex-wrap: wrap; gap: 5px;
  margin-top: 6px;
}
.card-tag {
  font-size: 0.72rem;
  padding: 3px 9px;
  background: var(--ed-paper);
  border: 1px solid var(--ed-rule);
  color: var(--ed-muted);
}
.card-arrow {
  font-size: 0;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--ed-rule-soft);
  display: flex; align-items: center; gap: 10px;
}
.card-arrow::before {
  content: 'Read';
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ed-shu);
}
.card-arrow::after {
  content: '';
  flex: 1; height: 1px;
  background: var(--ed-shu);
  opacity: 0.35;
  transition: opacity 0.3s, transform 0.3s;
  transform-origin: left;
}
.article-card:hover .card-arrow::after {
  opacity: 1;
}

/* ── COLUMN PAGE CTA ── */
.column-cta {
  background: var(--ed-ink);
  color: var(--ed-paper);
  padding: 52px 38px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.column-cta::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--ed-shu);
}
.column-cta-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem; font-weight: 500; letter-spacing: 0.16em;
  color: var(--ed-shu);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.column-cta h2 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.4rem; font-weight: 700;
  line-height: 1.6; letter-spacing: 0.02em;
  margin-bottom: 14px;
  color: var(--ed-paper);
}
.column-cta p {
  font-size: 0.94rem;
  color: rgba(250,247,242,0.7);
  line-height: 1.95;
  margin-bottom: 32px;
}
.column-cta-btn {
  display: inline-block;
  background: var(--ed-shu); color: #fff;
  font-size: 1rem; font-weight: 700;
  padding: 16px 42px; letter-spacing: 0.04em;
  border-radius: 2px;
  text-decoration: none;
  transition: background 0.2s;
}
.column-cta-btn:hover { background: #fff; color: var(--ed-shu); }
.column-cta small {
  display: block; font-size: 0.76rem;
  color: rgba(250,247,242,0.55);
  margin-top: 14px;
}

/* ── FILTER ANIMATION ── */
.article-card { transition: background 0.2s, opacity 0.3s; }
.article-card.hidden { display: none; }

/* ── FOOTER OVERRIDE ── */
footer {
  background: var(--ed-ink);
  color: rgba(250,247,242,0.55);
  padding: 32px 24px;
  font-size: 0.8rem;
}
footer a { color: rgba(250,247,242,0.7); }
footer a:hover { color: var(--ed-shu); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .page-header { padding: 106px 20px 44px; }
  .container { padding: 48px 20px 64px; }
  .article-grid { grid-template-columns: 1fr; }
  .cat-filter { gap: 6px; }
  .cat-btn { font-size: 0.76rem; padding: 7px 14px; }
  .popular-section { padding: 22px 20px 14px; }
  .popular-title { font-size: 0.84rem; }
  .column-cta { padding: 36px 22px; }
  .column-cta h2 { font-size: 1.2rem; }
}