/**
 * SWELL Accordion Archive v2.0.0
 */

.saa-archive {
  --saa-color-text:   var(--color_text,   #333);
  --saa-color-muted:  var(--color_gray,   #888);
  --saa-color-border: var(--color_border, #e2e2e2);
  --saa-color-hover:  rgba(0, 0, 0, 0.04);
  --saa-color-accent: var(--color_main,   #0073aa);
  --saa-fz:           0.875rem;
  --saa-indent-m:     0.75rem;
  --saa-indent-p:     1.3rem;
  --saa-duration:     0.3s;
  --saa-ease:         cubic-bezier(0.4, 0, 0.2, 1);

  font-size: var(--saa-fz);
  line-height: 1.5;
  color: var(--saa-color-text);
}

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

/* ── リスト ── */
.saa-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.saa-item {
  border-bottom: 1px solid var(--saa-color-border);
}
.saa-item:last-child {
  border-bottom: none;
}

/* ── トグルボタン（年・月） ── */
.saa-toggle {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.5rem 1.6rem 0.5rem 0;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s;
}
.saa-toggle:hover,
.saa-toggle:focus-visible {
  background: var(--saa-color-hover);
  outline: none;
}
.saa-toggle:focus-visible {
  box-shadow: inset 0 0 0 2px var(--saa-color-accent);
}

.saa-toggle__inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  width: 100%;
  gap: 0.4rem;
  min-width: 0;
}

.saa-label {
  font-weight: 600;
  white-space: nowrap;
}

.saa-count {
  font-size: 0.78em;
  color: var(--saa-color-muted);
  flex-shrink: 0;
}

/* 矢印アイコン */
.saa-toggle::after {
  content: '';
  position: absolute;
  right: 0.4rem;
  top: 50%;
  width: 0.42rem;
  height: 0.42rem;
  margin-top: -0.3rem;
  border-right: 1.5px solid var(--saa-color-muted);
  border-bottom: 1.5px solid var(--saa-color-muted);
  transform: rotate(-45deg);
  transition: transform var(--saa-duration) var(--saa-ease),
              margin-top var(--saa-duration) var(--saa-ease);
  pointer-events: none;
}
.saa-toggle[aria-expanded="true"]::after {
  transform: rotate(45deg);
  margin-top: -0.1rem;
}

/* 階層インデント */
.saa-toggle--year  { padding-left: 0; }
.saa-toggle--month { padding-left: var(--saa-indent-m); }

/* ── 記事リンク（日+タイトル） ── */
.saa-link--post {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.42rem 0.4rem 0.42rem var(--saa-indent-p);
  text-decoration: none;
  color: var(--saa-color-text);
  overflow: hidden;          /* flex コンテナ自体も隠す */
  transition: background-color 0.15s, color 0.15s;
}
.saa-link--post:hover,
.saa-link--post:focus-visible {
  background: var(--saa-color-hover);
  color: var(--saa-color-accent);
  outline: none;
}
.saa-link--post:focus-visible {
  box-shadow: inset 0 0 0 2px var(--saa-color-accent);
}

/* 日付（例: 5日）― 幅固定・縮まない */
.saa-day {
  flex-shrink: 0;
  min-width: 2.4em;
  font-size: 0.78em;
  color: var(--saa-color-muted);
  white-space: nowrap;
}

/* タイトル ― 1行で省略 */
.saa-title {
  flex: 1;
  min-width: 0;           /* flex 子要素の text-overflow に必須 */
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 0.85em;
}

/* ── パネル（スライド開閉） ── */
.saa-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--saa-duration) var(--saa-ease);
}

/* hidden 状態は display: none で完全非表示 */
.saa-panel[hidden] {
  display: none !important;
}

/* 開いた状態 */
.saa-panel.is-open {
  grid-template-rows: 1fr;
}

.saa-panel__inner {
  overflow: hidden;
  min-height: 0;
}

/* ── レスポンシブ ── */
@media (max-width: 959px) {
  .saa-archive {
    --saa-fz: 0.9rem;
  }
}

/* アニメーション無効設定を尊重 */
@media (prefers-reduced-motion: reduce) {
  .saa-panel,
  .saa-toggle::after {
    transition: none;
  }
}