/* =========================================================
   column.css — コラム一覧 & 記事詳細 共通スタイル
   ========================================================= */

/* =====================================================
   一覧ページ
   ===================================================== */

/* ---------- フィルタータブ ---------- */
.col-filter {
  position: sticky;
  top: 64px;
  z-index: 40;
  background: rgba(244, 248, 255, 0.88);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.col-filter__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.col-filter__list::-webkit-scrollbar {
  display: none;
}
.col-filter__btn {
  display: block;
  padding: 14px 22px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--sans);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color 0.2s,
    border-color 0.2s;
  text-decoration: none;
}
.col-filter__btn:hover,
.col-filter__btn.is-active {
  color: var(--brand-1);
  border-bottom-color: var(--brand-1);
}

/* ---------- レイアウト ---------- */
.col-list {
  background: var(--bg);
}
.col-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}
.col-main {
  min-width: 0;
}

/* ---------- フィーチャードカード ---------- */
.col-card--featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  margin-bottom: 32px;
  background: #fff;
  transition:
    box-shadow 0.3s,
    border-color 0.3s,
    transform 0.3s var(--ease);
}
.col-card--featured:hover {
  box-shadow: 0 16px 48px rgba(31, 108, 255, 0.12);
  border-color: var(--brand-1);
  transform: translateY(-4px);
}
.col-card--featured .col-card__img-wrap {
  height: 100%;
  min-height: 260px;
}
/* フィーチャード: 画像がwrapperを埋めるよう伸長 */
.col-card--featured .col-card__img {
  flex: 1;
  aspect-ratio: unset;
  min-height: 0;
}
.col-card--featured .col-card__body {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.col-card--featured .col-card__title {
  font-size: clamp(17px, 2vw, 22px);
}
.col-card--featured .col-card__excerpt {
  -webkit-line-clamp: 4;
}
.col-card--featured.is-hidden {
  display: none;
}

/* ---------- 通常カードグリッド ---------- */
.col-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.col-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  background: #fff;
  transition:
    transform 0.3s var(--ease),
    box-shadow 0.3s,
    border-color 0.3s;
}
.col-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(31, 108, 255, 0.1);
  border-color: var(--brand-1);
}
.col-card.is-hidden {
  display: none;
}

/* サムネイル */
.col-card__img-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  /* overflow: hidden は .col-card__img に移動 */
}
.col-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  overflow: hidden; /* スケールアニメーションのクリップ */
  transition: transform 0.4s var(--ease);
}
.col-card:hover .col-card__img {
  transform: scale(1.03);
}
.col-card__img svg {
  width: 100%;
  height: 100%;
  display: block;
}
.col-card__img-wrap .col-card__cat {
  position: absolute;
  left: 15px;
  top: 15px;
}
/* カテゴリバッジ（フロー配置・画像直下） */
.col-card__cat {
  display: inline-flex;
  align-items: center;
  position: relative;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 3px 12px;
  border-radius: 40px;
}
.col-card__cat--ai {
  background: rgba(31, 108, 255, 0.85);
  color: #fff;
}
.col-card__cat--seo {
  background: rgba(106, 60, 255, 0.85);
  color: #fff;
}
.col-card__cat--wp {
  background: rgba(0, 128, 200, 0.85);
  color: #fff;
}
.col-card__cat--design {
  background: rgba(0, 180, 180, 0.85);
  color: #fff;
}
.col-card__cat--mfg {
  background: rgba(200, 120, 0, 0.85);
  color: #fff;
}

/* カード本文 */
.col-card__body {
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.col-card--featured .col-card__img-wrap {
  border-radius: 0;
  aspect-ratio: unset;
}
.col-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.col-card__read {
  letter-spacing: 0.04em;
}
.col-card__title {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.55;
  color: var(--ink);
  margin: 0;
  flex: 1;
}
.col-card__excerpt {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}
.col-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--brand-1);
  margin-top: auto;
  transition: gap 0.2s;
}
.col-card:hover .col-card__link {
  gap: 10px;
}

/* ---------- 空表示 ---------- */
.col-empty {
  text-align: center;
  padding: 60px 0;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- サイドバー ---------- */
.col-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.col-widget {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 20px;
}
.col-widget__title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.col-cat-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 4px;
}
.col-cat-list__btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 8px 12px;
  background: none;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  font-family: var(--sans);
  text-decoration: none;
  transition:
    background 0.2s,
    color 0.2s;
  text-align: left;
}
.col-cat-list__btn:hover,
.col-cat-list__btn.is-active,
.col-cat-list__btn--active {
  background: rgba(31, 108, 255, 0.07);
  color: var(--brand-1);
}
.col-cat-list__btn span {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  background: rgba(0, 0, 0, 0.06);
  padding: 1px 7px;
  border-radius: 40px;
}
.col-recent {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.col-recent__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  text-decoration: none;
  color: var(--ink);
}
.col-recent__item:hover .col-recent__title {
  color: var(--brand-1);
}
.col-recent__cat {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 40px;
  white-space: nowrap;
  flex-shrink: 0;
}
.col-recent__title {
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 4px;
}
.col-recent__date {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
}
.col-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.col-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 4px 12px;
  border-radius: 40px;
  text-decoration: none;
  transition:
    border-color 0.2s,
    color 0.2s;
}
.col-tag:hover {
  border-color: var(--brand-1);
  color: var(--brand-1);
}
.col-widget--cta {
  background: var(--deep);
  border-color: transparent;
  text-align: center;
}
.col-widget-cta__lead {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin: 0 0 16px;
}
.col-widget-cta__btn {
  display: block;
  background: var(--grad);
  color: #fff;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  transition: opacity 0.2s;
}
.col-widget-cta__btn:hover {
  opacity: 0.85;
}

/* ---------- 関連記事 ---------- */
.col-related {
  background: var(--bg-2);
}
.col-related__head {
  text-align: center;
  margin-bottom: 40px;
}
.col-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.col-related__more {
  text-align: center;
  margin-top: 40px;
}

/* =====================================================
   詳細ページ
   ===================================================== */

/* ---------- 記事ヘッダー ---------- */
.art-header {
  background: var(--deep);
  padding: clamp(80px, 10vw, 130px) 0 clamp(48px, 5vw, 64px);
}
.art-header .breadcrumb a,
.art-header .breadcrumb {
  color: rgba(255, 255, 255, 0.45);
}
.art-header .breadcrumb a:hover {
  color: rgba(255, 255, 255, 0.8);
}
.art-header .breadcrumb__sep {
  opacity: 0.3;
}
.art-header .breadcrumb span:last-child {
  color: rgba(255, 255, 255, 0.7);
}
.art-header__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 20px;
  flex-wrap: wrap;
}
.art-header__date {
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.art-header__read {
  font-family: var(--mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
}
.art-header__title {
  font-size: clamp(24px, 4vw, 44px);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}
.art-header__lead {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.9;
  margin: 0 0 28px;
  max-width: 680px;
}
.art-header__author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.art-header__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.2);
}
.art-header__author-name {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
}
.art-header__author-role {
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.06em;
}

/* ---------- 記事レイアウト ---------- */
.art-wrap {
  background: var(--bg);
}
.art-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  align-items: start;
}
.art-main {
  min-width: 0;
}

/* ---------- 記事本文 ---------- */
.art-body {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(32px, 4vw, 56px);
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
}
.art-body section {
  margin-bottom: 56px;
}
.art-body section:last-of-type {
  margin-bottom: 0;
}
.art-body h2 {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line);
  position: relative;
}
.art-body h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--grad);
}
.art-body h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
  margin: 32px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--brand-1);
}
.art-body p {
  margin: 0 0 16px;
}
.art-body p:last-child {
  margin-bottom: 0;
}
.art-body ul,
.art-body ol {
  padding-left: 0;
  margin: 0 0 20px;
  list-style: none;
  display: grid;
  gap: 8px;
}
.art-body ul li,
.art-body ol li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.75;
}
.art-body ul li::before {
  content: "→";
  color: var(--brand-1);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.art-body ol {
  counter-reset: ol-counter;
}
.art-body ol li::before {
  counter-increment: ol-counter;
  content: counter(ol-counter);
  width: 22px;
  height: 22px;
  background: var(--grad);
  color: #fff;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--mono);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.art-body strong {
  color: var(--ink);
  font-weight: 800;
}
.art-body code {
  font-family: var(--mono);
  font-size: 13px;
  background: rgba(31, 108, 255, 0.07);
  color: var(--brand-1);
  padding: 1px 6px;
  border-radius: 4px;
}

/* コールアウト */
.art-callout {
  display: flex;
  gap: 16px;
  background: rgba(31, 108, 255, 0.05);
  border: 1px solid rgba(31, 108, 255, 0.2);
  border-left: 4px solid var(--brand-1);
  border-radius: 0 12px 12px 0;
  padding: 20px;
  margin: 24px 0;
}
.art-callout__icon {
  font-size: 22px;
  flex-shrink: 0;
  line-height: 1;
}
.art-callout strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 6px;
}
.art-callout p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0;
}

/* 引用 */
.art-quote {
  border-left: 4px solid var(--brand-2);
  margin: 24px 0;
  padding: 16px 20px;
  background: rgba(0, 198, 255, 0.04);
  border-radius: 0 10px 10px 0;
}
.art-quote p {
  font-size: 14px;
  color: var(--ink);
  font-style: italic;
  margin: 0;
  line-height: 1.8;
}

/* チェックリスト */
.art-check-list {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}
.art-check-item {
  display: flex;
  gap: 16px;
  background: var(--bg-2);
  border-radius: 12px;
  padding: 20px;
}
.art-check-item__num {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--brand-1);
  background: rgba(31, 108, 255, 0.1);
  border: 1px solid rgba(31, 108, 255, 0.2);
  padding: 4px 10px;
  border-radius: 40px;
  flex-shrink: 0;
  height: fit-content;
  margin-top: 2px;
}
.art-check-item strong {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
}
.art-check-item p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0;
}

/* コードブロック */
.art-code {
  margin: 24px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.art-code__label {
  background: var(--deep);
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--mono);
  font-size: 11px;
  padding: 8px 16px;
  letter-spacing: 0.06em;
}
.art-code pre {
  background: #0d1b36;
  margin: 0;
  padding: 20px;
  overflow-x: auto;
}
.art-code code {
  background: none;
  color: rgba(0, 212, 255, 0.85);
  font-size: 13px;
  font-family: var(--mono);
  padding: 0;
  border-radius: 0;
}

/* テーブル */
.art-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}
.art-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.art-table th {
  background: var(--deep);
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}
.art-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  vertical-align: top;
}
.art-table tr:last-child td {
  border-bottom: none;
}
.art-table tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.02);
}

/* ステップ */
.art-steps {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}
.art-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--bg-2);
  border-radius: 12px;
  padding: 20px;
}
.art-step__num {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  color: #fff;
  background: var(--grad);
  padding: 4px 10px;
  border-radius: 40px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
  letter-spacing: 0.08em;
}
.art-step__body strong {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
}
.art-step__body p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0;
}

/* まとめボックス */
.art-summary {
  background: rgba(31, 108, 255, 0.04);
  border: 1px solid rgba(31, 108, 255, 0.2);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}
.art-summary h3 {
  font-size: 13px;
  font-family: var(--mono);
  color: var(--brand-1);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 14px;
  padding: 0;
  border: none;
}
.art-summary ul {
  margin: 0;
}

/* ---------- 目次 ---------- */
.art-toc {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 40px;
}
.art-toc__title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.art-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 6px;
  counter-reset: toc;
}
.art-toc__list > li {
  counter-increment: toc;
}
.art-toc__list a {
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  display: block;
  padding: 4px 0;
  transition: color 0.2s;
}
.art-toc__list a:hover {
  color: var(--brand-1);
}
.art-toc__list ol {
  padding-left: 16px;
  margin: 4px 0 0;
}
.art-toc__list ol a {
  font-size: 12px;
}

/* サイドバー目次 */
.art-toc-side {
  position: sticky;
  top: 100px;
}
.art-toc__list--side {
  counter-reset: toc2;
}
.art-toc__list--side > li {
  counter-increment: toc2;
}
.art-toc__list--side a {
  font-size: 12px;
  color: var(--muted);
}
.art-toc__list--side a.is-active,
.art-toc__list--side a:hover {
  color: var(--brand-1);
}

/* ---------- 著者 ---------- */
.art-author {
  display: flex;
  gap: 20px;
  background: var(--bg-2);
  border-radius: 14px;
  padding: 24px;
  margin-top: 48px;
}
.art-author__img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.art-author__name {
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 2px;
}
.art-author__role {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: block;
}
.art-author__bio {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 0;
}

/* ---------- 前後ナビ ---------- */
.art-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 32px;
}
.art-nav__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
.art-nav__item:hover {
  border-color: var(--brand-1);
  box-shadow: 0 4px 16px rgba(31, 108, 255, 0.1);
}
.art-nav__item--next {
  text-align: right;
}
.art-nav__label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.1em;
}
.art-nav__title {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

/* =====================================================
   レスポンシブ
   ===================================================== */
@media (max-width: 1000px) {
  .art-layout {
    grid-template-columns: 1fr;
  }
  .art-toc-side {
    display: none;
  }
  .col-related__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 860px) {
  .col-layout {
    grid-template-columns: 1fr;
  }
  .col-sidebar {
    position: static;
  }
  .col-card--featured {
    grid-template-columns: 1fr;
  }
  .col-card--featured .col-card__img-wrap {
    min-height: 200px;
  }
  .col-related__grid {
    grid-template-columns: 1fr;
  }
  .art-nav {
    grid-template-columns: 1fr;
  }
  .art-nav__item--next {
    text-align: left;
  }
}
@media (max-width: 640px) {
  .col-grid {
    grid-template-columns: 1fr;
  }
  .art-body {
    padding: 24px 20px;
  }
  .art-check-item,
  .art-step {
    flex-direction: column;
    gap: 10px;
  }
  .col-filter__btn {
    padding: 12px 14px;
    font-size: 12px;
  }
}