:root {
  --bg: #faf8f5;
  --bg-card: #fffefc;
  --text: #171717;
  --text-muted: #737373;
  --border: #e5e4eb;
  --separator: #d4d2dc;
  /* ボタン・リンク: #333 前後のダークグレー */
  --accent: #333333;
  --accent-hover: #1a1a1a;
  --accent-soft: rgba(51, 51, 51, 0.08);
  --accent-border: rgba(51, 51, 51, 0.25);
  --radius: 4px;
  --radius-sm: 2px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-btn-hover: 0 2px 6px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease;
  --focus-ring: 0 0 0 2px var(--bg-card), 0 0 0 4px var(--accent);
  --touch-min: 44px;
  /* 投稿画面ボタン用 */
  --btn-preview: #64748b;
  --btn-preview-hover: #475569;
  --btn-draft: #78716c;
  --btn-draft-hover: #57534e;
  /* ボタン共通: タグと同じピル形・黒で統一 */
  --btn-radius: 999px;
  --btn-black: #1a1a1a;
  /* コメント投稿直後のハイライトアニメ */
  --comment-highlight-bg: rgba(255, 200, 50, 0.6);
  --comment-highlight-ring: rgba(255, 180, 0, 0.6);
  --comment-highlight-glow: rgba(255, 200, 50, 0.4);
  --comment-highlight-mid: rgba(255, 210, 80, 0.35);
}

/*
 * font-display: swap は Google Fonts URL の display=swap で指定済み。
 * optional は LCP 優先で同一テキスト表示を妥協する場合の選択肢。
 * フォールバック時の CLS 軽減のため、ローカルフォントに Noto 相当のメトリクスを付与。
 * 出典: Noto Sans JP usWinAscent 1160 / usWinDescent 288 / UPM 1000, line-gap 0
 */
@font-face {
  font-family: "Noto Sans JP";
  src: local("Hiragino Kaku Gothic ProN"), local("Hiragino Sans"), local("Yu Gothic Medium"), local("Yu Gothic");
  ascent-override: 116%;
  descent-override: 28.8%;
  line-gap-override: 0%;
}

@font-face {
  font-family: "Noto Serif JP";
  src: local("Yu Mincho"), local("Yu Mincho Medium"), local("MS PMincho");
  ascent-override: 116%;
  descent-override: 28.8%;
  line-gap-override: 0%;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.47;
  color: var(--text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image: none;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.022em;
}

/* リンク: 下線 + ホバーで下線が伸びるアニメーション（gradient） */
.main a[href] {
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.18);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size 0.3s ease, border-bottom-color 0.3s ease;
}
.main a[href]:hover,
.main a[href]:focus-visible {
  border-bottom-color: transparent;
  background-size: 100% 1px;
}
.main a[href]::after {
  content: none;
  display: none;
}

/* 記事一覧のサムネイルリンク：下線アニメなし（.main a[href] より優先） */
.main a.entry-photo-link,
.main a.entry-photo-link:hover,
.main a.entry-photo-link:focus-visible {
  border-bottom: none;
  background-image: none;
  background-size: 0;
}

/* 背景写真ストリップ: Photo カテゴリ・Photo 個別ページでのみ base で出力される */
.bg-photo-strip {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  overflow: hidden;
  width: 100vw;
}

/* 各 .bg-photo に黒オーバーレイをかけ、hover で取り除く */

.bg-photo {
  flex: 1 1 80px;
  min-width: 80px;
  aspect-ratio: 1;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: block;
  text-decoration: none;
  position: relative;
}

.bg-photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.bg-photo:hover::after {
  opacity: 0;
}

@keyframes tooltip-line-underline {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.bg-photo-tooltip {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 20;
  display: inline-block;
  padding: 0 0 4px 0;
  font-size: 2.25rem;
  font-weight: 500;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  max-width: min(85vw, 520px);
  line-height: 1.35;
}

.bg-photo-tooltip .tooltip-line {
  display: block;
  width: max-content;
  max-width: 100%;
  position: relative;
}

.bg-photo-tooltip .tooltip-line::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
}

.bg-photo:hover .bg-photo-tooltip {
  opacity: 1;
}

.bg-photo:hover .bg-photo-tooltip .tooltip-line:nth-child(1)::after {
  animation: tooltip-line-underline 0.6s ease-in-out 0s forwards;
}
.bg-photo:hover .bg-photo-tooltip .tooltip-line:nth-child(2)::after {
  animation: tooltip-line-underline 0.6s ease-in-out 0.35s forwards;
}
.bg-photo:hover .bg-photo-tooltip .tooltip-line:nth-child(3)::after {
  animation: tooltip-line-underline 0.6s ease-in-out 0.7s forwards;
}
.bg-photo:hover .bg-photo-tooltip .tooltip-line:nth-child(4)::after {
  animation: tooltip-line-underline 0.6s ease-in-out 1.05s forwards;
}
.bg-photo:hover .bg-photo-tooltip .tooltip-line:nth-child(n+5)::after {
  animation: tooltip-line-underline 0.6s ease-in-out 1.4s forwards;
}

body > .main {
  position: relative;
  z-index: 1;
}

.main .wrap {
  pointer-events: auto;
}

.main {
  pointer-events: none;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* トップ: メイン + サイドカラム（Moblog / QuadCamera / Video 各1件） */
body.index .main .wrap {
  max-width: 960px;
}

.index-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
  align-items: start;
}

.index-main {
  min-width: 0;
}

.index-sidebar-section {
  margin-bottom: 1.5rem;
}

.index-sidebar-section:last-child {
  margin-bottom: 0;
}

.index-sidebar-entry .entry-body,
.index-sidebar-entry .entry-more,
.index-sidebar-entry .entry-actions,
.index-sidebar-entry .entry-place-map,
.index-sidebar-entry .entry-meta-fields,
.index-sidebar-entry .entry-quote {
  display: none;
}

/* Video セクションは本文（動画埋め込み）を表示 */
.index-sidebar-section--video .entry-body,
.index-sidebar-section--video .entry-more {
  display: block;
  font-size: 11px;
}

.index-sidebar-section--video .entry-body iframe,
.index-sidebar-section--video .entry-more iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 200px;
  border-radius: var(--radius-sm);
}

.index-sidebar-entry .entry-title {
  font-size: 1rem;
}

.index-sidebar-entry .entry-time {
  font-size: 0.75rem;
}

.index-sidebar-entry .entry-photo-slideshow,
.index-sidebar-entry .entry-photo-link,
.index-sidebar-entry .entry-photo--moblog-tiles {
  max-height: 220px;
  overflow: hidden;
}

.index-sidebar-entry .entry-photo-slideshow .entry-photo-slide img,
.index-sidebar-entry .entry-photo-link .quadcamera-flipbook {
  width: 100%;
  object-fit: cover;
}

/* Moblog セクションの写真は幅50%、高さ制限あり */
.index-sidebar-section:not(.index-sidebar-section--video):not(.index-sidebar-section--quadcamera) .entry-photo-slideshow,
.index-sidebar-section:not(.index-sidebar-section--video):not(.index-sidebar-section--quadcamera) .entry-photo-link {
  width: 50%;
  max-height: 220px;
  overflow: hidden;
}

.index-sidebar-section:not(.index-sidebar-section--video) .entry-photo-slideshow .entry-photo-slide img,
.index-sidebar-section:not(.index-sidebar-section--video) .entry-photo-link .quadcamera-flipbook {
  width: 100%;
  object-fit: cover;
}

/* QuadCamera セクション: 写真は幅50%、縦は全部表示（max-height なし） */
.index-sidebar-section--quadcamera .entry-photo-link {
  width: 50%;
  max-height: none;
  overflow: visible;
}

.index-sidebar-section--quadcamera .entry-photo-link .quadcamera-flipbook {
  width: 100%;
  object-fit: contain;
}

.index-sidebar-section--quadcamera .quadcamera-flipbook .quadcamera-sprite {
  width: 100%;
  aspect-ratio: 3 / 4;
  max-height: none;
  object-fit: contain;
}

@media (max-width: 768px) {
  .index-layout {
    grid-template-columns: 1fr;
  }

  .index-sidebar {
    position: static;
  }
}

/* logo: bottom-left fixed */
@keyframes bg-shift {
  0%, 100% { background-color: var(--bg-card); }
  50% { background-color: var(--bg); }
}

.site-breadcrumb {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 10;
  padding: 0 1rem 0 0.5rem;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  min-height: var(--touch-min);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.site-breadcrumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.8);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.35s ease;
  z-index: -1;
}

.site-breadcrumb:hover::before {
  transform: scaleX(1);
}

.site-breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.site-breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.site-breadcrumb-icon {
  opacity: 0.85;
  text-decoration: none;
  border: none;
}

.site-breadcrumb-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  vertical-align: -0.25em;
  text-decoration: none;
  border: none;
  margin-right: 10px;
}

.site-breadcrumb-link {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.18);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: color var(--transition), background-size 0.3s ease, border-bottom-color 0.3s ease;
}

.site-breadcrumb-link:hover,
.site-breadcrumb-link:focus-visible {
  color: var(--accent);
  border-bottom-color: transparent;
  background-size: 100% 1px;
}

.site-breadcrumb-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.site-breadcrumb-current {
  color: var(--text);
}

.site-breadcrumb-sep {
  color: var(--text);
  user-select: none;
  pointer-events: none;
  font-size: 0.6em;
  margin-right: 1.2em;
}

/* nav: 左下固定、ホバーゾーンでメニュー表示（アイコンなし） */
.site-nav-fixed {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 10;
  font-size: 0.8125rem;
  letter-spacing: -0.01em;
}
.site-nav-fixed.is-open {
  inset: 0;
  width: 100%;
  height: 100%;
  bottom: auto;
  left: auto;
}

/* メニュー閉じているときのホバー・フォーカス用の見えないトリガー */
.site-nav-trigger-zone {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 11;
  width: 3rem;
  height: 3rem;
  cursor: pointer;
}
.site-nav-fixed.is-open .site-nav-trigger-zone {
  width: 0;
  height: 0;
  overflow: hidden;
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* メニューオープン時は左下のパンくずを隠し、メニュー内アバターだけ見せる */
.is-nav-open .site-breadcrumb {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

/* メニュー: エリアの左下から右へ並べ、折り返しは上へ
   wrap-reverse だと cross-start/cross-end が入れ替わるので、下寄せは align-content: flex-start */
.site-nav-menu {
  position: fixed;
  inset: 0;
  z-index: 9;
  display: flex;
  flex-flow: row wrap-reverse;
  align-content: flex-start;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 0.5rem;
  padding: 2rem;
  box-sizing: border-box;
  background-color: color-mix(in srgb, var(--bg-card) 70%, transparent);
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
}

/* メニュー内ユーザーアバター: リンク行の高さを基準に中央に配置 */
.site-nav-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  min-width: 4rem;
  min-height: 4rem;
  margin: 0 1rem 0 2rem;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--border);
  transform: scale(0.3);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
  transition-delay: 0s;
  flex-shrink: 0;
  cursor: pointer;
  align-self: center;
}

.site-nav-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-nav-avatar i {
  font-size: 2rem;
  color: var(--text);
  opacity: 0.9;
}

.site-nav-fixed.is-open .site-nav-menu .site-nav-avatar {
  transform: scale(1);
  opacity: 1;
  transition-delay: 0.02s;
}

.site-nav-fixed .site-nav-menu[hidden] {
  display: none;
}

.site-nav-fixed.is-open .site-nav-menu {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

@property --nav-link-fill {
  syntax: "<percentage>";             
  inherits: false;
  initial-value: 0%;
}

.site-nav-menu a {
  --nav-link-fill: 0%;
  margin: 0;
  position: relative;
  overflow: hidden;
  width: max-content;
  min-width: 1.5em;
  background-color: var(--border);
  color: transparent;
  text-decoration: none;
  padding: 0.5em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.875rem, min(6vw, 8vh), 10vmin);
  font-weight: 500;
  line-height: 1;
  transform-origin: left bottom;
  transform: scale(0.3);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease, --nav-link-fill 0.4s ease;
  transition-delay: 0s;
  box-sizing: border-box;
  -webkit-background-clip: text;
  background-clip: text;
  background-image: linear-gradient(90deg, #fff 0%, #fff var(--nav-link-fill), var(--text) var(--nav-link-fill));
  z-index: 1;
  min-height: 0;
  white-space: nowrap;
}

.site-nav-menu a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 100%;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
  z-index: -1;
}

.site-nav-menu a:hover {
  --nav-link-fill: 100%;
  background-image: linear-gradient(90deg, #fff, #fff);
  color: #fff;
}

.site-nav-menu a:hover::before {
  transform: scaleX(1);
}

.site-nav-fixed.is-open .site-nav-menu a {
  transform: scale(1);
  opacity: 1;
  transition-delay: 0.05s;
}

.site-nav-fixed.is-open .site-nav-menu a:nth-child(2) { transition-delay: 0.06s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(3) { transition-delay: 0.1s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(4) { transition-delay: 0.14s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(5) { transition-delay: 0.18s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(6) { transition-delay: 0.22s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(7) { transition-delay: 0.26s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(8) { transition-delay: 0.3s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(9) { transition-delay: 0.34s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(10) { transition-delay: 0.38s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(11) { transition-delay: 0.42s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(12) { transition-delay: 0.46s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(13) { transition-delay: 0.5s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(14) { transition-delay: 0.54s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(15) { transition-delay: 0.58s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(16) { transition-delay: 0.62s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(17) { transition-delay: 0.66s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(18) { transition-delay: 0.7s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(19) { transition-delay: 0.74s; }
.site-nav-fixed.is-open .site-nav-menu a:nth-child(20) { transition-delay: 0.78s; }

.site-nav-menu a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* main */
.main {
  padding: 2rem 0 3rem;
}

/* フラッシュ: 画面右上に固定、ふわっと表示・消去、先頭にスピナー */
.flash-toast {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.flash-toast-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin: 0;
  box-shadow: var(--shadow);
  animation: flash-toast-in 0.35s ease forwards;
}

.flash-toast-item.is-out {
  animation: flash-toast-out 0.35s ease forwards;
}

.flash-toast-spinner {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--border);
  border-top-color: transparent;
  border-radius: 50%;
  animation: flash-spin 0.7s linear infinite;
}

.flash-toast-text {
  flex: 1;
  min-width: 0;
}

@keyframes flash-toast-in {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes flash-toast-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
}

@keyframes flash-spin {
  to { transform: rotate(360deg); }
}