/* ==========================================================================
   publication.css
   Publication ページ（publication.html / en/publication.html）用
   ※ ヘッダー・フッター・ページ見出し帯は common.css にあります
   ※ 論文カードは js/publication_roader.js がスプレッドシートから自動生成します
   ========================================================================== */

/* --------------------------------------------------------------------------
   旧ハンバーガーメニューCSSの名残
   以前このファイルに丸ごとコピーされていた旧メニューCSSのうち、hamburger.css で
   上書きされずに効いていた指定だけを残しています（見た目を一切変えないため）。
   ・.burger の margin-right … スマホ時のメニューボタンが他ページより少し左に寄る
   ・overflow-x: hidden    … 横スクロールを防止
   他ページ（style.css 系）と揃えたい場合は、このブロックを削除してください。
   -------------------------------------------------------------------------- */
.burger {
  margin-right: 5%;
}
@media screen and (max-width: 1090px) {
  html, body {
    overflow-x: hidden;
  }
}

/* ==========================================================
   Design tokens
   ========================================================== */

:root {
  --paper: #F4F6F2;
  --paper-line: #DCE3D9;
  --ink: #152B3D;
  --ink-soft: #4E6270;
  --ink-faint: #8C9A9F;
  --cobalt: #1B4F8C;
  --cobalt-deep: #0E3352;
  --spark: #A9CB4C;
  --spark-glow: rgba(169, 203, 76, 0.35);
  --card-bg: #FFFFFF;
  --border: #D6DED2;
  --shadow: 0 1px 2px rgba(21, 43, 61, 0.04), 0 8px 24px rgba(21, 43, 61, 0.06);

  --font-display: 'Fraunces', 'Iowan Old Style', serif;
  --font-body: 'IBM Plex Sans', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', monospace;

  --radius-card: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }
a { color: inherit; }
code { font-family: var(--font-mono); }
/* ==========================================================
   Header
   ========================================================== */

.stat-trace {
  max-width: 640px;
  margin: 0 auto -6px;
}
.trace-svg { width: 100%; height: 24px; display: block; }
.trace-line {
  stroke: var(--border);
  stroke-width: 1.4;
  fill: none;
}
.trace-node {
  fill: var(--paper);
  stroke: var(--cobalt);
  stroke-width: 1.6;
}

.stats {
  display: flex;
  gap: 3rem;
  justify-content: space-between;
  max-width: 640px;
  margin: 0.6rem auto 0;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 0.15rem; min-width: 80px; }
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--ink);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ==========================================================
   Controls
   ========================================================== */
.content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px dashed var(--border);
}

.field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.field-search {
  position: relative;
  flex: 1 1 260px;
  min-width: 220px;
}
.field-icon {
  position: absolute;
  left: 0.8rem;
  width: 16px; height: 16px;
  color: var(--ink-faint);
  pointer-events: none;
}
#searchInput {
  width: 100%;
  padding: 0.65rem 0.9rem 0.65rem 2.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--ink);
}
#searchInput::placeholder { color: var(--ink-faint); }
#searchInput:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 1px;
}

.field-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}

#yearSelect {
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink);
}
#yearSelect:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 1px; }

.field-tags {
  align-items: center;
  gap: 0.6rem;
}
.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tag-filter-item {
  cursor: pointer;
  user-select: none;
}
.tag-filter-item input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.tag-filter-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--ink-soft);
  background: var(--card-bg);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.tag-filter-item input:checked + .tag-filter-pill {
  background: var(--cobalt);
  border-color: var(--cobalt);
  color: #fff;
}
.tag-filter-item input:focus-visible + .tag-filter-pill {
  outline: 2px solid var(--cobalt);
  outline-offset: 2px;
}

.result-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  white-space: nowrap;
}

/* ==========================================================
   States (loading / error / empty)
   ========================================================== */
.state-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  padding: 4rem 1rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.state-message[hidden] { display: none; }
.state-error { color: #8a3b2c; }
.error-detail { font-size: 0.85rem; color: var(--ink-soft); max-width: 40em; }

.spinner {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 2.5px solid var(--border);
  border-top-color: var(--cobalt);
  animation: spin 0.8s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2.4s; }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================================
   Paper grid & cards
   ========================================================== */
.paper-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.4rem;
}

.paper-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.paper-card:hover,
.paper-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 2px 4px rgba(21,43,61,0.06), 0 14px 32px rgba(21,43,61,0.10);
}

.card-index {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  background: rgba(21, 43, 61, 0.82);
  color: #EAF1E8;
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
}

.card-figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  background: #FCFCFA;
  position: relative;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.card-figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.6rem;
}
.card-figure.no-image { display: flex; align-items: center; justify-content: center; }

.ga-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink-faint);
  padding: 1rem;
}
.ga-placeholder svg { width: 44px; height: 44px; color: var(--cobalt); opacity: 0.55; }
.ga-placeholder span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
}

.card-body {
  padding: 1.1rem 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  flex: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.35;
  margin: 0;
  color: var(--ink);
}
.card-title i, .card-title em { font-style: italic; }

.card-authors {
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.card-journal {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--cobalt-deep);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--spark-glow);
  color: var(--cobalt-deep);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease;
}
a.tag-pill:hover, a.tag-pill:focus-visible {
  background: var(--cobalt);
  color: #fff;
  outline: none;
}

.card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--border);
}

.meta-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.doi-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-decoration: none;
  color: var(--cobalt);
  border: 1px solid var(--cobalt);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.doi-link:hover, .doi-link:focus-visible {
  background: var(--cobalt);
  color: #fff;
  box-shadow: 0 0 0 3px var(--spark-glow);
}
.doi-link:focus-visible { outline: none; }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 640px) {
  .site-header { padding: 3rem 1.2rem 2rem; }
  .stats { gap: 1.6rem; }
  .result-count { margin-left: 0; width: 100%; order: 10; }
  .paper-grid { grid-template-columns: 1fr; }
}