:root {
  --bg: #faf7f1;
  --paper: #fffbf3;
  --ink: #2a261f;
  --ink-soft: #5a5448;
  --accent: #8a4a3b;
  --accent-soft: #c89f8e;
  --border: #d6c9b3;
  --shadow: 0 2px 18px rgba(80, 60, 30, .06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", serif;
  line-height: 1.7;
}

.topbar {
  background: #1e1b16;
  color: #f0e8d6;
  padding: .6em 0;
  border-bottom: 1px solid #3a3328;
}
.topbar-in {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
}
.brand {
  color: #f0e8d6;
  text-decoration: none;
  font-size: 1.1em;
  display: flex;
  align-items: center;
  gap: .5em;
}
.brand-mark { color: var(--accent-soft); font-size: 1.3em; }
.brand-name { letter-spacing: .1em; }
.topbar-links a {
  color: #c0b8a2;
  text-decoration: none;
  font-size: .85em;
  margin-left: 1.2em;
  white-space: nowrap;
}
.topbar-links a:hover { color: #fff; }
.topbar-links a.current { color: var(--accent-soft, #d4a87a); font-weight: bold; pointer-events: none; }
@media (max-width: 600px) {
  .topbar-links a { margin-left: .7em; font-size: .76em; }
  .topbar-links a:not(.current) { display: none; }
  .topbar-links a.current { display: inline; }
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.4em 1em 4em;
}

.date-nav {
  display: flex;
  align-items: center;
  gap: .55em;
  margin-bottom: 1.5em;
  flex-wrap: wrap;
}
.date-btn, .today-btn, .copy-btn {
  font-family: inherit;
  font-size: 1em;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--ink);
  border-radius: 6px;
  padding: .35em .8em;
  cursor: pointer;
  transition: background .12s;
}
.date-btn:hover, .today-btn:hover, .copy-btn:hover {
  background: var(--accent-soft);
  color: #fff;
}
#date-picker {
  font-family: inherit;
  font-size: 1em;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .3em .5em;
  background: #fff;
}

.poem-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2em 1.5em;
  box-shadow: var(--shadow);
  margin-bottom: 1.4em;
}
.poem-card.loading .loading-msg {
  color: var(--ink-soft);
  text-align: center;
  padding: 2em 0;
}
/* 詞書 / 場面: 常時展開 */
.kotobagaki-expanded {
  margin-bottom: 1.1em;
  border-left: 3px solid var(--accent-soft);
  padding-left: .9em;
  font-size: .9em;
  color: var(--ink-soft);
}
.kotobagaki-expanded .context-label {
  color: var(--accent);
  font-size: .8em;
  font-weight: 600;
  letter-spacing: .08em;
  margin-bottom: .25em;
}
.kotobagaki-expanded .context-orig {
  line-height: 1.85;
}
.kotobagaki-expanded .context-modern {
  margin-top: .55em;
  padding-top: .45em;
  border-top: 1px dashed var(--border);
  color: var(--ink);
  line-height: 1.7;
}
.kotobagaki-expanded .context-modern strong {
  color: var(--accent);
  font-weight: 600;
  margin-right: .3em;
}
.date-label {
  text-align: center;
  color: var(--ink-soft);
  font-size: .85em;
  margin-bottom: .6em;
}
.kanji {
  font-size: 1.55em;
  line-height: 2.1;
  text-align: center;
  margin: 0 0 .8em;
  letter-spacing: .02em;
}
.segments {
  text-align: center;
  color: var(--ink-soft);
  font-size: .95em;
  margin: 0 0 1.2em;
}
.segments span:not(:last-child)::after {
  content: " / ";
  color: var(--accent-soft);
  margin: 0 .15em;
}
.attribution {
  text-align: right;
  color: var(--ink-soft);
  font-size: .9em;
  margin-top: 1em;
  padding-top: .8em;
  border-top: 1px dashed var(--border);
}
.attribution .author { color: var(--ink); font-weight: 600; }
.attribution .source { font-size: .85em; margin-left: .6em; }

.shuffle-row {
  display: flex;
  justify-content: center;
  margin: -.6em 0 1.4em;
}
.shuffle-btn {
  font-family: inherit;
  font-size: .95em;
  background: #fff;
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: .45em 1.4em;
  cursor: pointer;
  transition: background .12s, color .12s, transform .15s;
  display: inline-flex;
  align-items: center;
  gap: .5em;
}
.shuffle-btn:hover {
  background: var(--accent);
  color: #fff;
}
.shuffle-btn:active {
  transform: scale(0.96);
}
.shuffle-icon {
  font-size: 1.15em;
  display: inline-block;
  transition: transform .4s ease;
}
.shuffle-btn:hover .shuffle-icon {
  transform: rotate(180deg);
}
.mode-tag {
  display: inline-block;
  font-size: .7em;
  background: var(--accent-soft);
  color: #fff;
  padding: .15em .55em;
  border-radius: 999px;
  margin-left: .4em;
  letter-spacing: .04em;
  vertical-align: middle;
}

/* poem-card に統合された解説部 */
.poem-explanation {
  margin-top: 1.4em;
  padding-top: 1.2em;
  border-top: 1px solid var(--border);
}
.gendaiyaku-fold {
  margin-bottom: 1.2em;
}
.gendaiyaku-fold > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  color: var(--accent);
  font-size: .95em;
  border-bottom: 1px solid var(--border);
  padding-bottom: .25em;
  margin-bottom: .5em;
  letter-spacing: .05em;
  user-select: none;
}
.gendaiyaku-fold > summary::-webkit-details-marker { display: none; }
.gendaiyaku-fold > summary::before {
  content: '▾';
  font-size: .75em;
  margin-right: .35em;
  transition: transform .15s;
  display: inline-block;
}
.gendaiyaku-fold:not([open]) > summary::before {
  transform: rotate(-90deg);
}
.gendaiyaku-fold > p {
  margin: 0;
}
.exp-block-inline {
  margin-bottom: 1.1em;
}
.exp-block-inline:last-child {
  margin-bottom: 0;
}
.exp-block-inline h3 {
  margin: 0 0 .4em;
  font-size: .95em;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: .25em;
  letter-spacing: .05em;
}
.exp-block-inline p { margin: 0; line-height: 1.75; }
.exp-block-inline ul {
  margin: 0;
  padding-left: 1.3em;
  list-style: square;
}
.exp-block-inline li { margin-bottom: .35em; }
.exp-block-inline li .label {
  color: var(--accent);
  font-weight: 600;
  margin-right: .4em;
}
.exp-meta-inline {
  margin-top: 1em;
  padding-top: .5em;
  border-top: 1px dashed var(--border);
  color: var(--ink-soft);
  font-size: .75em;
  text-align: right;
}
.exp-empty-inline {
  background: #f8f3e5;
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 1em;
  text-align: center;
  color: var(--ink-soft);
  font-size: .9em;
}

.exp-section {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4em 1.5em;
  box-shadow: var(--shadow);
}
.exp-block { margin-bottom: 1.2em; }
.exp-block:last-of-type { margin-bottom: 0; }
.exp-block h3 {
  margin: 0 0 .4em;
  font-size: .95em;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: .25em;
  letter-spacing: .05em;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.trans-toggle {
  font-family: inherit;
  font-size: .7em;
  background: transparent;
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: .15em .7em;
  cursor: pointer;
  letter-spacing: 0;
  transition: background .12s, color .12s;
}
.trans-toggle:hover {
  background: var(--accent);
  color: #fff;
}
.trans-source {
  font-size: .75em;
  color: var(--ink-soft);
  margin-top: .3em;
  text-align: right;
}
.exp-block p { margin: 0; }
.exp-block ul {
  margin: 0;
  padding-left: 1.3em;
  list-style: square;
}
.exp-block li { margin-bottom: .35em; }
.exp-block li .label {
  color: var(--accent);
  font-weight: 600;
  margin-right: .4em;
}
.exp-meta {
  margin-top: 1em;
  padding-top: .6em;
  border-top: 1px dashed var(--border);
  color: var(--ink-soft);
  font-size: .75em;
  text-align: right;
}

.exp-empty {
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 1.5em;
  text-align: center;
  color: var(--ink-soft);
}
.exp-empty .hint {
  font-size: .8em;
  color: #999;
}
.exp-empty code {
  background: #f0ece0;
  padding: .1em .4em;
  border-radius: 3px;
  font-size: .9em;
}

/* ---- 共有ボタン ---- */
.share-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .6em;
  margin: 1.6em 0 0;
  padding: 1em 0;
  border-top: 1px dashed var(--border);
  flex-wrap: wrap;
}
.share-label {
  color: var(--ink-soft);
  font-size: .85em;
  margin-right: .5em;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4em;
  height: 2.4em;
  border-radius: 50%;
  text-decoration: none;
  font-weight: bold;
  font-size: .95em;
  transition: transform .12s, box-shadow .12s;
  cursor: pointer;
  user-select: none;
}
.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0,0,0,.18);
}
.share-x     { background: #000; color: #fff; }
.share-fb    { background: #1877f2; color: #fff; }
.share-line  { background: #06c755; color: #fff; }
.share-email { background: #5d5346; color: #fff; }
.share-rss   { background: #ee802f; color: #fff; border: none; padding: 0; }
.share-btn svg { display: block; }

/* AI 整形バッジ (現代風訳 summary 内) */
.ai-badge {
  display: inline-block;
  background: #c89f8e;
  color: #fff;
  font-size: .65em;
  padding: .15em .55em;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: .05em;
  margin-left: .55em;
  vertical-align: middle;
}

/* RSS URL ダイアログ */
.rss-dialog {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4em 1.6em;
  max-width: 480px;
  width: 90%;
  background: var(--paper);
  color: var(--ink);
  font-family: inherit;
}
.rss-dialog::backdrop {
  background: rgba(30, 27, 22, .5);
}
.rss-dialog h3 {
  margin: 0 0 .6em;
  color: var(--accent);
  font-size: 1.1em;
}
.rss-help {
  color: var(--ink-soft);
  font-size: .85em;
  margin: 0 0 1em;
}
.rss-url {
  width: 100%;
  padding: .55em .7em;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: .85em;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}
.rss-actions {
  display: flex;
  gap: .6em;
  margin-top: 1em;
  justify-content: flex-end;
}
.rss-btn, .rss-btn-primary {
  font-family: inherit;
  border-radius: 6px;
  padding: .45em 1em;
  cursor: pointer;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
}
.rss-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.rss-btn:hover, .rss-btn-primary:hover { opacity: .85; }

/* 場面の現代語訳: 折り畳み */
.context-modern-fold {
  margin-top: .5em;
  padding-top: .35em;
  border-top: 1px dashed var(--border);
}
.context-modern-fold > summary {
  cursor: pointer;
  list-style: none;
  color: var(--accent);
  font-size: .85em;
  user-select: none;
}
.context-modern-fold > summary::-webkit-details-marker { display: none; }
.context-modern-fold > summary::before {
  content: '▸';
  margin-right: .3em;
  display: inline-block;
  transition: transform .15s;
}
.context-modern-fold[open] > summary::before {
  transform: rotate(90deg);
}
.context-modern-fold > summary:hover { color: var(--ink); }
.context-modern-fold .context-modern {
  margin-top: .4em;
  padding-top: 0;
  border-top: none;
  color: var(--ink);
  line-height: 1.7;
}

/* 訳出 (出典) */
.trans-attrib {
  margin-top: .4em;
  color: var(--ink-soft);
  font-size: .72em;
  text-align: right;
  font-style: italic;
}

/* ---- footer ---- */
.site-footer {
  margin-top: 3em;
  padding: 1.4em 0 2em;
  background: #1e1b16;
  color: #c0b8a2;
  font-size: .85em;
  border-top: 1px solid #3a3328;
}
.footer-in {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.4em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
  flex-wrap: wrap;
}
.footer-link {
  color: #c0b8a2;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .35em .9em;
  border: 1px solid #3a3328;
  border-radius: 999px;
  transition: background .12s, color .12s, border-color .12s;
}
.footer-link.footer-icon-only {
  width: 2.4em; height: 2.4em; padding: 0;
  justify-content: center; border-radius: 50%; gap: 0;
}
.footer-link:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.footer-link svg { display: block; }
.footer-copy {
  color: #6e6655;
  font-size: .8em;
}

.hidden { display: none !important; }

@media (max-width: 540px) {
  .kanji { font-size: 1.25em; line-height: 1.9; }
  .poem-card { padding: 1.4em 1em; }
  .exp-section, .exp-empty { padding: 1.1em 1em; }
}