/* ===========================================================
   AI Booth Studio — Columns (blog/posts)
   =========================================================== */

.column-page {
  background: var(--c-bg);
  padding: clamp(40px, 6vw, 80px) 0 clamp(64px, 8vw, 112px);
}

.column-page__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: clamp(20px, 4vw, 40px);
}


/* ===========================================================
   Breadcrumbs
   =========================================================== */
.breadcrumb {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-ink-3);
}
.breadcrumb__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "›";
  color: var(--c-line-strong);
  font-size: 14px;
  margin-right: 2px;
}
.breadcrumb__item a {
  color: var(--c-ink-3);
  text-decoration: none;
  transition: color var(--t-fast);
}
.breadcrumb__item a:hover {
  color: var(--c-brand);
  opacity: 1;
}
.breadcrumb__item--current {
  color: var(--c-ink);
  font-weight: 500;
}


/* ===========================================================
   Column hero (archive / single 共通)
   =========================================================== */
.column-hero {
  text-align: center;
  margin-bottom: clamp(32px, 5vw, 56px);
}
.column-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ff-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-brand);
}
.column-hero__eyebrow::before,
.column-hero__eyebrow::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--c-brand);
}
.column-hero__title {
  margin: 14px 0 10px;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-ink);
  line-height: 1.4;
}
.column-hero__lead {
  margin: 0 auto;
  max-width: 640px;
  font-size: 15px;
  line-height: 2;
  color: var(--c-ink-2);
}


/* ===========================================================
   Layout : 2-col with sidebar
   =========================================================== */
.column-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

@media (max-width: 960px) {
  .column-layout {
    grid-template-columns: 1fr;
  }
}


/* ===========================================================
   Card grid (archive)
   =========================================================== */
.column-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: clamp(20px, 2.6vw, 28px);
}

.column-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-1);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.column-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-3);
  border-color: var(--c-brand-line);
}

.column-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--c-bg-tint);
  overflow: hidden;
}
.column-card__media img,
.column-card__media__placeholder {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform var(--t-base);
}
.column-card:hover .column-card__media img {
  transform: scale(1.04);
}
.column-card__media__placeholder {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--c-brand-soft) 0%, var(--c-bg-tint) 100%);
}
.column-card__media__placeholder::after {
  content: "AI BOOTH STUDIO";
  font-family: var(--ff-en);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-brand);
  opacity: 0.7;
}

.column-card__body {
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.column-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-family: var(--ff-en);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-ink-3);
}
.column-card__cat {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  background: var(--c-brand-soft);
  color: var(--c-brand);
  font-family: var(--ff);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background var(--t-fast);
}
.column-card__cat:hover {
  background: var(--c-brand);
  color: #fff;
  opacity: 1;
}

.column-card__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.column-card__title a {
  color: inherit;
  text-decoration: none;
  background-image: linear-gradient(var(--c-brand), var(--c-brand));
  background-repeat: no-repeat;
  background-size: 0 1px;
  background-position: 0 100%;
  transition: background-size var(--t-base), color var(--t-fast);
}
.column-card__title a:hover {
  color: var(--c-brand);
  background-size: 100% 1px;
  opacity: 1;
}

.column-card__excerpt {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--c-ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* ===========================================================
   Pagination
   =========================================================== */
.column-pagination {
  margin-top: clamp(36px, 5vw, 56px);
  display: flex;
  justify-content: center;
}
.column-pagination .nav-links,
.column-pagination .page-numbers-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}
.column-pagination .page-numbers {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  background: #fff;
  border: 1px solid var(--c-line);
  color: var(--c-ink);
  font-family: var(--ff-en);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.column-pagination .page-numbers:hover {
  border-color: var(--c-brand-line);
  color: var(--c-brand);
  opacity: 1;
}
.column-pagination .page-numbers.current {
  background: var(--c-brand);
  border-color: var(--c-brand);
  color: #fff;
}
.column-pagination .page-numbers.dots {
  border-color: transparent;
  background: transparent;
  color: var(--c-ink-3);
}


/* ===========================================================
   Single article
   =========================================================== */
.column-article {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-2);
}

.column-article__header {
  padding: clamp(24px, 3.5vw, 40px) clamp(20px, 3vw, 40px) 0;
}

.column-article__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  font-family: var(--ff-en);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-ink-3);
}
.column-article__meta time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.column-article__meta time::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-brand);
  display: inline-block;
}
.column-article__cat {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  background: var(--c-brand-soft);
  color: var(--c-brand);
  font-family: var(--ff);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.column-article__title {
  margin: 14px 0 18px;
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}

.column-article__thumb {
  margin: 0 0 clamp(20px, 3vw, 32px);
  aspect-ratio: 16 / 9;
  background: var(--c-bg-tint);
  overflow: hidden;
}
.column-article__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Body content typography ---------------------------------- */
.column-article__body {
  padding: clamp(8px, 1.5vw, 16px) clamp(20px, 3vw, 40px) clamp(28px, 4vw, 48px);
  font-size: 16px;
  line-height: 2;
  color: var(--c-ink-2);
  letter-spacing: 0.02em;
}
.column-article__body > * + * {
  margin-top: 1.4em;
}
.column-article__body h2 {
  margin-top: 2.4em;
  padding: 14px 18px;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--c-ink);
  background: var(--c-brand-soft);
  border-left: 4px solid var(--c-brand);
  border-radius: var(--r-sm);
}
.column-article__body h3 {
  margin-top: 2em;
  padding-bottom: 8px;
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--c-ink);
  border-bottom: 2px solid var(--c-brand);
  display: inline-block;
  padding-right: 14px;
}
.column-article__body h4 {
  margin-top: 1.8em;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 700;
  color: var(--c-ink);
}
.column-article__body p {
  margin: 0;
}
.column-article__body a {
  color: var(--c-brand);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.column-article__body a:hover {
  color: var(--c-brand-deep);
  opacity: 1;
}
.column-article__body strong { font-weight: 700; color: var(--c-ink); }
.column-article__body em     { font-style: italic; }
.column-article__body ul,
.column-article__body ol {
  margin: 0;
  padding-left: 1.6em;
}
.column-article__body ul li,
.column-article__body ol li {
  padding-left: 4px;
  margin-bottom: 8px;
}
.column-article__body ul li::marker { color: var(--c-brand); }
.column-article__body blockquote {
  margin: 0;
  padding: 18px 24px;
  background: var(--c-bg-soft);
  border-left: 4px solid var(--c-line-strong);
  border-radius: var(--r-sm);
  font-size: 15px;
  color: var(--c-ink-2);
  font-style: italic;
}
.column-article__body img {
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
}
.column-article__body figure {
  margin: 0;
}
.column-article__body figure figcaption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--c-ink-3);
  text-align: center;
}
.column-article__body pre {
  padding: 18px 20px;
  background: var(--c-ink);
  color: #DCE0F0;
  border-radius: var(--r-md);
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
}
.column-article__body code {
  padding: 2px 6px;
  background: var(--c-bg-tint);
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--c-ink);
}
.column-article__body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}
.column-article__body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border: 1px solid var(--c-line);
}
.column-article__body th,
.column-article__body td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
}
.column-article__body th {
  background: var(--c-bg-soft);
  font-weight: 700;
  color: var(--c-ink);
}


/* Tags & share -------------------------------------------- */
.column-article__footer {
  padding: 0 clamp(20px, 3vw, 40px) clamp(24px, 3.5vw, 36px);
  display: grid;
  gap: 18px;
}
.column-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
}
.column-tags__tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--c-bg-soft);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-ink-2);
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast);
}
.column-tags__tag:hover {
  background: var(--c-brand);
  color: #fff;
  opacity: 1;
}
.column-tags__tag::before { content: "#"; margin-right: 4px; color: var(--c-ink-3); }
.column-tags__tag:hover::before { color: rgba(255,255,255,.7); }


/* Prev / Next navigation ---------------------------------- */
.column-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 40px);
}
.column-nav__prev,
.column-nav__next {
  padding: 16px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  text-decoration: none;
}
.column-nav__next { text-align: right; }
.column-nav__prev:hover,
.column-nav__next:hover {
  border-color: var(--c-brand-line);
  box-shadow: var(--sh-1);
  opacity: 1;
}
.column-nav__label {
  font-size: 11px;
  font-family: var(--ff-en);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-brand);
}
.column-nav__title {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* ===========================================================
   Related posts
   =========================================================== */
.column-related {
  margin-top: clamp(40px, 5vw, 64px);
}
.column-related__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
.column-related__title {
  margin: 0;
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: 0.04em;
}
.column-related__title::before {
  content: "—";
  margin-right: 10px;
  color: var(--c-brand);
}


/* ===========================================================
   Sidebar
   =========================================================== */
.column-sidebar {
  display: grid;
  gap: 24px;
  position: sticky;
  top: 92px;
}
@media (max-width: 960px) {
  .column-sidebar {
    position: static;
    top: auto;
  }
}

.sidebar-widget {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 22px 22px;
}
.sidebar-widget__title {
  margin: 0 0 16px;
  font-size: 13px;
  font-family: var(--ff-en);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-brand);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-widget__title::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--c-brand);
}

/* Categories ------------------------------------- */
.sidebar-cats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.sidebar-cats li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 13px;
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--c-line);
  transition: color var(--t-fast), padding-left var(--t-fast);
}
.sidebar-cats li a:hover {
  color: var(--c-brand);
  padding-left: 4px;
  opacity: 1;
}
.sidebar-cats__count {
  font-family: var(--ff-en);
  font-size: 11px;
  color: var(--c-ink-3);
  letter-spacing: 0.04em;
}

/* Popular posts ----------------------------------- */
.sidebar-popular {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
  counter-reset: pop;
}
.sidebar-popular li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: start;
}
.sidebar-popular li::before {
  counter-increment: pop;
  content: counter(pop, decimal-leading-zero);
  font-family: var(--ff-en);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: 0;
  line-height: 1.5;
}
.sidebar-popular__link {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-ink);
  text-decoration: none;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--t-fast);
}
.sidebar-popular__link:hover {
  color: var(--c-brand);
  opacity: 1;
}

/* Tags ------------------------------------------- */
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.sidebar-tags a {
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--c-bg-soft);
  font-size: 12px;
  color: var(--c-ink-2);
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast);
}
.sidebar-tags a:hover {
  background: var(--c-brand);
  color: #fff;
  opacity: 1;
}


/* ===========================================================
   404 / search no result
   =========================================================== */
.column-empty {
  padding: clamp(60px, 8vw, 100px) 20px;
  text-align: center;
  background: #fff;
  border: 1px dashed var(--c-line-strong);
  border-radius: var(--r-lg);
}
.column-empty p { margin: 0 0 18px; color: var(--c-ink-2); }
.column-empty a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--r-pill);
  background: var(--c-brand);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  letter-spacing: 0.04em;
}
.column-empty a:hover { background: var(--c-brand-deep); opacity: 1; }