:root {
  --ink: #ffffff;
  --paper: #fbfaf7;
  --panel-line: #e7e5df;
  --text: #14171a;
  --muted: #57606a;
  --gold: #b8912f;
  --gold-bright: #8f6f22;
  --rule: rgba(184, 145, 47, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: 'Zen Kaku Gothic New', 'Noto Sans JP', sans-serif;
  line-height: 1.85;
  font-size: 16px;
}

a { color: inherit; }

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- two-column layout: post list + sidebar --- */

.content-layout {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.posts-main {
  flex: 1;
  min-width: 0;
}

.x-sidebar {
  width: 300px;
  flex-shrink: 0;
  position: sticky;
  top: 24px;
  background: var(--paper);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 18px;
}

.x-sidebar-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin: 0 0 14px;
}

.x-sidebar-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.x-sidebar-profile img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.x-sidebar-name {
  font-family: 'Shippori Mincho', serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.x-sidebar-handle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
}

.x-sidebar-handle:hover { color: var(--gold-bright); }

@media (max-width: 880px) {
  .content-layout { flex-direction: column; }
  .x-sidebar { width: 100%; position: static; }
}

/* --- banner / avatar --- */

.banner {
  width: 100%;
  aspect-ratio: 1983 / 793;
  overflow: hidden;
}

.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  border: 4px solid var(--ink);
  background: var(--paper);
  object-fit: cover;
  display: block;
  margin-top: -52px;
  margin-bottom: 16px;
}

/* --- header --- */

.site-header {
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--panel-line);
}

.site-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin-bottom: 14px;
}

.site-title {
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  font-size: clamp(30px, 5vw, 42px);
  margin: 0 0 14px;
  letter-spacing: 0.02em;
  color: var(--text);
}

.gold-rule {
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 18px 0 20px;
  transform-origin: left;
  animation: draw-rule 1.1s ease-out;
}

@keyframes draw-rule {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@media (prefers-reduced-motion: reduce) {
  .gold-rule { animation: none; }
}

.site-tagline {
  color: var(--muted);
  font-size: 15px;
  max-width: 52ch;
  margin: 0 0 22px;
}

.site-links {
  display: flex;
  gap: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  flex-wrap: wrap;
}

.site-links a {
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--panel-line);
  padding: 7px 14px;
  border-radius: 999px;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.site-links a:hover,
.site-links a:focus-visible {
  color: var(--gold-bright);
  border-color: var(--gold);
  background: var(--paper);
}

.site-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.site-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* --- search & tag filter --- */

.post-search {
  width: 100%;
  padding: 11px 16px;
  border: 1px solid var(--panel-line);
  border-radius: 999px;
  font-size: 14px;
  font-family: 'Zen Kaku Gothic New', sans-serif;
  color: var(--text);
  background: #fff;
  margin: 40px 0 16px;
}

.post-search:focus {
  outline: none;
  border-color: var(--gold);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.tag-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.02em;
  border: 1px solid var(--panel-line);
  background: #fff;
  color: var(--muted);
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.tag-btn:hover { border-color: var(--gold); color: var(--gold-bright); }

.tag-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}

.no-results {
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0;
  display: none;
}

/* tag pills shown on post-item / article header */
.post-tags, .article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 6px 0 0;
}

.post-tags .tag-pill, .article-tags .tag-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--gold-bright);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 2px 9px;
  border-radius: 999px;
  text-decoration: none;
}

.article-tags { margin: 14px 0 0; }
.article-tags .tag-pill:hover { background: var(--gold); color: #fff; }

/* --- post list --- */

.post-list-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 14px;
  color: var(--gold-bright);
  letter-spacing: 0.06em;
  margin: 48px 0 18px;
}

.post-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 22px 20px;
  margin: 0 -20px 4px;
  border-bottom: 1px solid var(--panel-line);
  text-decoration: none;
  color: var(--text);
  border-radius: 12px;
  transition: background 0.15s ease;
}

.post-eyecatch {
  flex: 0 0 auto;
  width: 118px;
  height: 89px;
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  background: var(--paper);
  object-fit: cover;
}

.post-body {
  min-width: 0;
}

@media (max-width: 600px) {
  .post-item { gap: 12px; }
  .post-eyecatch { width: 84px; height: 64px; }
}

.post-item:hover,
.post-item:focus-visible {
  background: var(--paper);
}

.post-item:hover .post-item-title,
.post-item:focus-visible .post-item-title {
  color: var(--gold-bright);
}

.post-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.post-item-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 8px;
  transition: color 0.15s ease;
  color: var(--text);
}

.post-excerpt {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
  line-height: 1.7;
}

/* --- article page --- */

.article-header {
  padding: 56px 0 32px;
}

.back-link {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 28px;
}

.back-link:hover, .back-link:focus-visible { color: var(--gold-bright); }

.article-title {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(26px, 4.4vw, 36px);
  line-height: 1.45;
  margin: 0 0 14px;
  color: var(--text);
}

.article-body {
  padding: 12px 0 64px;
  font-size: 16px;
}

.article-body p { margin: 0 0 22px; }

.article-body h2 {
  font-family: 'Shippori Mincho', serif;
  font-size: 21px;
  margin: 44px 0 16px;
  color: var(--gold-bright);
}

.article-body ul {
  margin: 0 0 22px;
  padding-left: 22px;
}

.article-body li { margin-bottom: 8px; }

.article-body h3 {
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-size: 15.5px;
  font-weight: 700;
  margin: 22px 0 8px;
  color: var(--text);
}

.article-body h3 + p { margin: 0 0 22px; color: var(--muted); }

.article-body p a,
.article-body li a {
  color: var(--gold-bright);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 2px;
}

.article-body p a:hover,
.article-body li a:hover { text-decoration-color: var(--gold-bright); }

.article-toc {
  background: var(--paper);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 8px 0 36px;
}

.article-toc-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin: 0 0 12px;
}

.article-toc ol {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
}

.article-toc li { margin-bottom: 6px; }

.article-toc a {
  color: var(--text);
  text-decoration: none;
}

.article-toc a:hover, .article-toc a:focus-visible { color: var(--gold-bright); }

.pull-note {
  border-left: 2px solid var(--gold);
  background: var(--paper);
  padding: 14px 18px;
  color: var(--muted);
  font-size: 14px;
  margin: 28px 0;
  border-radius: 0 10px 10px 0;
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--panel-line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

.article-nav a {
  color: var(--text);
  text-decoration: none;
  max-width: 46%;
}

.article-nav a:hover, .article-nav a:focus-visible { color: var(--gold-bright); }

.article-nav .nav-next { text-align: right; margin-left: auto; }

.chart {
  margin: 28px 0;
  padding: 20px;
  background: var(--paper);
  border-radius: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.chart svg { flex-shrink: 0; }

.chart-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
  text-transform: uppercase;
  margin: 0 0 10px;
}

.chart-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--muted);
  flex: 1;
  min-width: 200px;
}

.chart-legend li { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.chart-legend .dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

.bar-chart { margin: 8px 0 0; }
.bar-row { margin-bottom: 14px; }
.bar-row .bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
}
.bar-track { background: var(--panel-line); border-radius: 6px; height: 10px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 6px; background: var(--gold); }
.bar-fill.is-before { background: var(--muted); }

/* --- footer --- */

.site-footer {
  border-top: 1px solid var(--panel-line);
  padding: 32px 0 56px;
  margin-top: 40px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.03em;
}