/* ============ aerbuf devlog ============
   Layered on top of styles.css — reuses its tokens, header, and footer. */

.devlog-index,
.devlog-post {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 4.5rem) 1.25rem 4rem;
}

/* ---------- tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }

.tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.24rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  white-space: nowrap;
}

.tag-xvo { color: #ff7d97; border-color: rgba(255, 45, 85, 0.4); }
.tag-tq { color: #ecc65f; border-color: rgba(217, 169, 60, 0.4); }
.tag-five { color: #6fd07f; border-color: rgba(63, 163, 77, 0.45); }
.tag-studio { color: #9fc0ff; border-color: rgba(46, 134, 255, 0.4); }
.tag-diary { color: #c8b4ff; border-color: rgba(160, 132, 255, 0.4); }
.tag-patch { color: #7fd6d1; border-color: rgba(94, 200, 194, 0.42); }

/* ---------- index hero ---------- */
.devlog-hero { text-align: center; margin-bottom: clamp(2rem, 5vw, 3rem); }

.devlog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  letter-spacing: -0.015em;
}

.devlog-hero .lede { margin-top: 1rem; }

.feed-link {
  margin-top: 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.feed-link a { color: #7db4ff; text-decoration: none; }
.feed-link a:hover { text-decoration: underline; }

/* ---------- filters ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
  margin-bottom: 1.9rem;
}

.filter {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.42rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.filter:hover { color: var(--text); }

.filter.is-active {
  color: var(--bg);
  background: var(--text);
  border-color: var(--text);
}

.filter-empty { text-align: center; color: var(--muted); padding: 2rem 0; }

/* ---------- post list ---------- */
.post-list {
  list-style: none;
  display: grid;
  gap: 1.1rem;
  padding: 0;
}

.post-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: transform 0.15s, border-color 0.15s;
}

.post-card:hover { transform: translateY(-2px); border-color: rgba(255, 255, 255, 0.2); }

.post-card > a {
  display: grid;
  gap: 0.55rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  text-decoration: none;
  color: inherit;
}

.post-card h3 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.25;
}

.post-card p { color: var(--muted); }

.post-meta {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.post-card .post-meta { margin-top: 0.1rem; }

/* ---------- empty state ---------- */
.empty-state {
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: clamp(2.25rem, 6vw, 3.5rem) 1.5rem;
  background: var(--panel);
  display: grid;
  gap: 0.9rem;
  justify-items: center;
}

.empty-state h2 { font-family: var(--font-display); font-size: 1.5rem; }
.empty-state p { color: var(--muted); max-width: 46ch; }

/* ---------- single post ---------- */
.crumbs { margin-bottom: 1.4rem; font-size: 0.9rem; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--text); }

.draft-banner {
  margin-bottom: 1.4rem;
  padding: 0.7rem 1.1rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  color: #ffc861;
  background: rgba(255, 200, 97, 0.1);
  border: 1px solid rgba(255, 200, 97, 0.35);
}

.post-head { padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); }

.post-head h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0.9rem 0 0.6rem;
}

.post-summary { font-size: 1.1rem; color: var(--muted); }
.post-head .post-meta { margin-top: 0.9rem; }

.post-body { padding-top: 1.75rem; font-size: 1.03rem; }

.post-body > * + * { margin-top: 1.1rem; }

.post-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin-top: 2.4rem;
  padding-top: 0.2rem;
}

.post-body h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-top: 1.8rem;
}

.post-body h4 { font-size: 1.02rem; margin-top: 1.4rem; }

.post-body ul,
.post-body ol { padding-left: 1.35rem; display: grid; gap: 0.45rem; }
.post-body li::marker { color: var(--muted); }
.post-body li > ul,
.post-body li > ol { margin-top: 0.45rem; }

.post-body a { color: #7db4ff; }

.post-body strong { color: #fff; }

.post-body blockquote {
  border-left: 3px solid var(--line);
  padding: 0.2rem 0 0.2rem 1.1rem;
  color: var(--muted);
  font-style: italic;
}

.post-body blockquote > * + * { margin-top: 0.7rem; }

.post-body code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
}

.post-body pre {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: #05070c;
  border: 1px solid var(--line);
}

.post-body pre code { padding: 0; background: none; border: none; font-size: 0.88rem; }

.post-body hr { border: none; border-top: 1px solid var(--line); margin: 2.2rem 0; }

.post-body img { border-radius: 12px; border: 1px solid var(--line); margin: 0 auto; }

.table-wrap { overflow-x: auto; }

.post-body table { border-collapse: collapse; width: 100%; font-size: 0.94rem; }

.post-body th,
.post-body td {
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.post-body th {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2.5rem;
  padding: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- post nav ---------- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}

.post-nav:empty { display: none; }

.post-nav-link {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s, border-color 0.15s;
}

.post-nav-link:hover { transform: translateY(-2px); border-color: rgba(255, 255, 255, 0.2); }
.post-nav-link span { color: var(--muted); font-size: 0.8rem; font-weight: 500; }
.post-nav-link.next { text-align: right; }
.post-nav-link.prev:only-child { grid-column: 1; }
.post-nav-link.next:only-child { grid-column: 2; }

.post-cta {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.post-cta a { color: #7db4ff; text-decoration: none; }
.post-cta a:hover { text-decoration: underline; }

/* ---------- homepage teaser ---------- */
.devlog-teaser {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.25rem 4rem;
}

.devlog-teaser .section-title { text-align: center; margin-bottom: 0.6rem; }

.devlog-teaser .section-lede {
  color: var(--muted);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 1.9rem;
}

.devlog-teaser .post-list { max-width: 820px; margin: 0 auto; }

.section-more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.8rem;
}

.ghost-link { color: var(--muted); font-size: 0.92rem; }

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-link.next { text-align: left; }
  .post-nav-link.next:only-child { grid-column: 1; }
}