@charset "UTF-8";
/*
 * blog.css — ブログ専用スタイル
 * 共通デザイン（フォント・色・ヘッダー・フッター・main#sub の h1 / section）は静的サイト側の CSS（sub.css）で管理
 * 色は sub.css の :root 変数を参照する
 */

/* =====================================================
   Variables
===================================================== */
:root {
  --blog-primary:    var(--sub-blue02, #0B638C);
  --blog-accent:     var(--sub-blue, #67c4b4);
  --blog-text:       var(--base-color, #222);
  --blog-text-muted: #888;
  --blog-bg:         var(--sub-blue03, #F3F8FB);
  --blog-border:     #dde6ea;
  --blog-white:      #fff;
  --blog-radius:     1.5rem;
  --blog-shadow:     0 2px 14px rgba(0, 0, 0, 0.07);
  --blog-shadow-lg:  0 6px 28px rgba(0, 0, 0, 0.11);
}

/* =====================================================
   Category Filter
===================================================== */
.blog-cat-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 5rem;
}

.blog-cat-btn {
  display: block;
  min-width: 14rem;
  padding: 0.5em 1.4em;
  border: 1px solid var(--blog-primary);
  border-radius: 5rem;
  color: var(--blog-primary);
  font-size: 1.4rem;
  text-align: center;
  line-height: 1.6;
  transition: background 0.22s, color 0.22s;
}

main .blog-cat-btn:hover,
.blog-cat-btn.is-active {
  background-color: var(--blog-primary);
  color: var(--blog-white);
  opacity: 1;
}

@media (max-width: 896px) {
  .blog-cat-filter {
    margin-bottom: 3rem;
  }
  .blog-cat-btn {
    min-width: 0;
    font-size: 1.25rem;
  }
}

/* =====================================================
   Article Card Grid
===================================================== */
.blog-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.2rem;
  list-style: none;
  padding: 0;
  margin: 0 0 6rem;
}

@media (max-width: 1024px) {
  .blog-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.4rem;
  }
}

@media (max-width: 525px) {
  .blog-list {
    gap: 1.4rem;
  }
}

/* =====================================================
   Article Card
===================================================== */
.blog-card {
  display: flex;
}

.blog-card a {
  display: flex;
  flex-direction: column;
  width: 100%;
  color: inherit;
  background: var(--blog-white);
  border-radius: var(--blog-radius);
  overflow: hidden;
  box-shadow: var(--blog-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

main .blog-card a:hover {
  transform: translateY(-5px);
  box-shadow: var(--blog-shadow-lg);
  opacity: 1;
}

.blog-card__thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--blog-bg);
  flex-shrink: 0;
}

main section .blog-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform 0.45s ease;
}

.blog-card a:hover .blog-card__thumb img {
  transform: scale(1.06);
}

.blog-card__thumb--noimage {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card__thumb--noimage::after {
  content: "";
  display: block;
  width: 35%;
  aspect-ratio: 1;
  background-color: var(--sub-blue04, #DDF3F0);
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z'/%3E%3C/svg%3E");
          mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z'/%3E%3C/svg%3E");
  -webkit-mask-size: contain;
          mask-size: contain;
  -webkit-mask-repeat: no-repeat;
          mask-repeat: no-repeat;
  -webkit-mask-position: center;
          mask-position: center;
}

.blog-card__body {
  padding: 1.6rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.blog-card__date {
  font-size: 1.2rem;
  color: var(--blog-text-muted);
  white-space: nowrap;
}

.blog-card__cat {
  display: inline-block;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.35em 0.9em;
  border-radius: 5rem;
  background-color: var(--blog-accent);
  color: var(--blog-white);
  white-space: nowrap;
}

.blog-card__title {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--blog-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 525px) {
  .blog-card__body  { padding: 1.2rem; }
  .blog-card__title { font-size: 1.3rem; }
  .blog-card__date  { font-size: 1.05rem; }
  .blog-card__cat   { font-size: 1rem; }
}

/* =====================================================
   Pagination
===================================================== */
.blog-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.blog-pagination .page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 4rem;
  height: 4rem;
  padding: 0 0.5em;
  border: 1px solid var(--blog-primary);
  border-radius: 5rem;
  font-size: 1.4rem;
  color: var(--blog-primary);
  line-height: 1;
  transition: background 0.22s, color 0.22s;
}

main .blog-pagination .page-numbers:hover,
.blog-pagination .page-numbers.current {
  background: var(--blog-primary);
  color: var(--blog-white);
  opacity: 1;
}

.blog-pagination .page-numbers.dots {
  border: none;
  background: transparent;
  color: var(--blog-text-muted);
}

/* =====================================================
   Empty State
===================================================== */
.blog-empty {
  text-align: center;
  padding: 6rem 0;
  color: var(--blog-text-muted);
  font-size: 1.6rem;
}

main section .blog-empty p {
  text-align: center;
}

/* =====================================================
   Single — h1 / Meta
===================================================== */
.blog-single-page h1 {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 5rem;
}

.blog-single-page h1 .en {
  font-size: 4.6rem;
}

@media (max-width: 896px) {
  .blog-single-page h1 {
    padding-inline: 2.5rem;
  }
  .blog-single-page h1 .en {
    font-size: 2.8rem;
  }
}

.blog-single-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.blog-single-date {
  font-size: 1.4rem;
  color: var(--blog-text-muted);
}

.blog-single-cat {
  display: inline-block;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.4em 1.1em;
  border-radius: 5rem;
  background: var(--blog-accent);
  color: var(--blog-white);
}

/* =====================================================
   Single — Related (Recommend)
===================================================== */
.blog-recommend {
  background: var(--blog-bg);
  border-radius: var(--blog-radius);
  padding: 2.5rem 3rem;
}

main section .blog-recommend__title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--blog-primary);
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--blog-primary);
}

.blog-recommend__link {
  display: flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--blog-border);
  color: var(--blog-text);
  font-size: 1.5rem;
  transition: color 0.2s, padding-left 0.2s;
}

.blog-recommend__link:last-child { border-bottom: none; }

main .blog-recommend__link:hover {
  color: var(--blog-primary);
  padding-left: 0.5em;
  opacity: 1;
}

.blog-recommend__link::before {
  content: "›";
  color: var(--blog-primary);
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}

@media (max-width: 896px) {
  .blog-recommend {
    padding: 2rem;
  }
}

/* =====================================================
   Single — Prev / Next Navigation
===================================================== */
.blog-post-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

main section .blog-post-nav .comBtn {
  margin: 0;
}

main section .blog-post-nav .comBtn a {
  width: 24rem;
}

@media (max-width: 896px) {
  .blog-post-nav {
    flex-direction: column;
    gap: 1.5rem;
  }
  main section .blog-post-nav .comBtn a {
    width: 100%;
  }
}

/* =====================================================
   404
===================================================== */
main section .blog-404__text {
  text-align: center;
  margin-bottom: 4rem;
}

.blog-404__cats {
  background: var(--blog-bg);
  border-radius: var(--blog-radius);
  padding: 3rem;
  max-width: 500px;
  margin: 0 auto;
}

main section .blog-404__cats-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--blog-primary);
  border-bottom: 2px solid var(--blog-primary);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.blog-404__cats li {
  font-size: 1.45rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--blog-border);
}

.blog-404__cats li:last-child { border-bottom: none; }

.blog-404__cats a {
  color: var(--blog-text);
}

.blog-404__cats a::before {
  content: "›";
  margin-right: 0.5em;
  color: var(--blog-primary);
}