@import url("./site-base.css");

/* ============================================================
   blog-index.css — ブログ一覧ページ
   （旧: pages/blog/index.html のインライン <style>）
   本文ページ側は blog-casual.css を使う
   ============================================================ */

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

body.blog-index {
  margin: 0;
  min-height: 100vh;
  font-family: var(--ff-body);
  color: var(--clr-ink);
  line-height: 1.8;
  background-color: var(--clr-base);
  background-image:
    radial-gradient(ellipse at 30% 0%,   var(--clr-base-warm) 0%, transparent 55%),
    radial-gradient(ellipse at 70% 100%, var(--clr-base-cool) 0%, transparent 55%);
}

body.blog-index h1,
body.blog-index p { margin: 0; }

body.blog-index img { display: block; max-width: 100%; }

/* ---- ヒーロー ---- */
.blog-index-hero {
  padding: 3.5rem 1.5rem 2.8rem;
  text-align: center;
  border-bottom: 1px solid var(--line-soft);
}

.blog-index-hero h1 {
  margin-bottom: .6rem;
  font-family: var(--ff-display);
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800;
  letter-spacing: .18em;
  color: var(--clr-ink);
}

.blog-index-hero h1 span { color: var(--clr-blue); }

.blog-index-hero p {
  font-size: .88rem;
  letter-spacing: .07em;
  color: var(--clr-ink-muted);
}

/* ---- タグフィルター ---- */
.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  padding: 1.4rem 1rem 1rem;
}

.blog-filter__btn {
  padding: .3rem .95rem;
  border-radius: 20px;
  border: 1px solid var(--line-mid);
  background: rgba(243, 237, 227, .5);
  font-family: inherit;
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--clr-ink-muted);
  cursor: pointer;
  transition: background .2s, border-color .2s, color .2s;
}

.blog-filter__btn:hover,
.blog-filter__btn.is-active {
  background: var(--clr-blue);
  border-color: var(--clr-blue);
  color: #fff;
}

/* ---- セクション見出し ---- */
.blog-section-label {
  max-width: 960px;
  margin: 1.8rem auto 1rem;
  padding: 0 1.5rem;
}

/* ---- カードグリッド ---- */
.blog-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem 1rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  background: rgba(243, 237, 227, .85);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}

.blog-card:hover,
.blog-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--clr-beige);
}

.blog-card__img {
  width: 100%;
  height: 155px;
  object-fit: cover;
}

.blog-card__body {
  flex: 1;
  padding: .9rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
}

.blog-card__date {
  font-family: var(--ff-mono);
  font-size: .68rem;
  letter-spacing: .04em;
  color: var(--clr-beige);
}

.blog-card__tag {
  padding: .15rem .55rem;
  border-radius: 10px;
  background: rgba(74, 127, 165, .1);
  font-size: .62rem;
  letter-spacing: .06em;
  color: var(--clr-blue);
}

.blog-card__title {
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--clr-ink);
}

.blog-card__summary {
  flex: 1;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--clr-ink-muted);
}

.blog-card__readmore {
  align-self: flex-start;
  margin-top: .4rem;
  font-family: var(--ff-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--clr-blue);
}

.blog-card__empty {
  grid-column: 1 / -1;
  padding: 2rem 1rem;
  text-align: center;
  font-size: .85rem;
  color: var(--clr-ink-muted);
}

/* ---- アーカイブ（旧記事・折りたたみ） ----
   記事が増えても一覧が伸びないよう、既定で閉じておく。JSは使わない。 */
.blog-archive {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 3.5rem;
}

.blog-archive__summary {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .7rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--ff-mono);
  font-size: .78rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--clr-beige);
  transition: color .2s;
}

.blog-archive__summary::-webkit-details-marker {
  display: none;
}

/* 開閉の三角を自前で出す */
.blog-archive__summary::before {
  content: "▸";
  font-size: .8rem;
  letter-spacing: 0;
  transition: transform .2s;
}

.blog-archive[open] .blog-archive__summary::before {
  transform: rotate(90deg);
}

.blog-archive__summary::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--line-mid), transparent);
}

.blog-archive__summary:hover,
.blog-archive__summary:focus-visible {
  color: var(--clr-blue);
}

/* details の中に入るので、リスト側の外側余白は summary 側が持つ */
.blog-archive .blog-archive-list {
  padding: .4rem 0 0;
}

/* ---- アーカイブリスト ---- */
.blog-archive-list {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 3.5rem;
}

.blog-archive-item {
  display: grid;
  grid-template-columns: 7rem 1fr 3.5rem;
  align-items: center;
  gap: .75rem;
  padding: .6rem .8rem;
  border-radius: 8px;
  background: rgba(243, 237, 227, .4);
  border: 1px solid transparent;
  color: inherit;
  text-decoration: none;
  transition: background .2s, border-color .2s, transform .15s;
}

.blog-archive-item:hover,
.blog-archive-item:focus-visible {
  background: rgba(243, 237, 227, .9);
  border-color: var(--line-mid);
  transform: translateX(3px);
}

.blog-archive-item__date {
  font-family: var(--ff-mono);
  font-size: .7rem;
  color: var(--clr-beige);
}

.blog-archive-item__title {
  font-size: .88rem;
  line-height: 1.4;
  color: var(--clr-ink);
}

.blog-archive-item__tag {
  font-family: var(--ff-mono);
  font-size: .62rem;
  text-align: right;
  color: var(--clr-blue-light);
}

@media (max-width: 480px) {
  .blog-card-grid { grid-template-columns: 1fr; }
  .blog-archive-item { grid-template-columns: 6rem 1fr; }
  .blog-archive-item__tag { display: none; }
}