/* ─── LLMx Blog — Styles ───────────────────────────────────────────────── */

:root {
  --ink:        #111111;
  --paper:      #f4f2ee;
  --paper-dim:  #e8e5de;
  --line:       rgba(17,17,17,0.12);
  --line-mid:   rgba(17,17,17,0.2);
  --muted:      rgba(17,17,17,0.45);
  --muted-mid:  rgba(17,17,17,0.6);
  --font-mono:  'Courier New', Courier, monospace;
  --font-serif: Georgia, 'Times New Roman', serif;
  --max-prose:  680px;
  --sidebar-w:  220px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:hover { opacity: 0.7; }

/* ─── SITE HEADER ─────────────────────────────────────────────────────── */
.blog-site-header {
  border-bottom: 1px solid var(--line-mid);
  padding: 14px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.blog-site-header .wordmark {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
}

.blog-site-header .wordmark span {
  opacity: 0.35;
  font-weight: 400;
  margin-left: 6px;
}

.blog-site-header nav {
  display: flex;
  gap: 28px;
}

.blog-site-header nav a {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted-mid);
}

.blog-site-header nav a:hover { color: var(--ink); opacity: 1; }
.blog-site-header nav a.active { color: var(--ink); }

/* ─── INDEX PAGE ──────────────────────────────────────────────────────── */
.blog-index {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 40px 100px;
}

.blog-index-header {
  margin-bottom: 56px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line-mid);
}

.blog-index-eyebrow {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.blog-index-title {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.blog-index-desc {
  font-size: 1rem;
  color: var(--muted-mid);
  line-height: 1.6;
  max-width: 520px;
}

/* Post list */
.post-list {
  list-style: none;
}

.post-list-item {
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
}

.post-list-item:first-child { padding-top: 0; }

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.post-readtime {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted);
  opacity: 0.7;
}

.post-readtime::before { content: '·'; margin-right: 12px; }

.post-list-title {
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.35;
  margin-bottom: 8px;
}

.post-list-title a {
  text-decoration: none;
  color: var(--ink);
}

.post-list-title a:hover {
  opacity: 1;
  text-decoration: underline;
  text-decoration-color: var(--line-mid);
  text-underline-offset: 3px;
}

.post-excerpt {
  font-size: 0.95rem;
  color: var(--muted-mid);
  line-height: 1.6;
  max-width: 580px;
}

.post-read-link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line-mid);
  padding-bottom: 1px;
}

.post-read-link:hover { opacity: 1; border-color: var(--ink); }

/* Empty state */
.blog-empty {
  padding: 60px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

/* ─── POST PAGE ───────────────────────────────────────────────────────── */
.post-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: calc(100vh - 52px);
}

/* Sidebar */
.post-sidebar {
  position: sticky;
  top: 52px;
  height: calc(100vh - 52px);
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 40px 24px 40px 40px;
  font-family: var(--font-mono);
}

.post-sidebar::-webkit-scrollbar { width: 2px; }
.post-sidebar::-webkit-scrollbar-track { background: transparent; }
.post-sidebar::-webkit-scrollbar-thumb { background: var(--line-mid); }

.sidebar-back {
  display: block;
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  margin-bottom: 32px;
}
.sidebar-back:hover { color: var(--ink); opacity: 1; }

.sidebar-label {
  font-size: 8px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.toc-list {
  list-style: none;
}

.toc-item {
  margin-bottom: 2px;
}

.toc-link {
  display: block;
  font-size: 11px;
  line-height: 1.5;
  color: var(--muted-mid);
  text-decoration: none;
  padding: 3px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: color 0.15s, border-color 0.15s;
}

.toc-link:hover { color: var(--ink); opacity: 1; }
.toc-link.active { color: var(--ink); border-left-color: var(--ink); }
.toc-link.toc-h3 { font-size: 10px; padding-left: 20px; opacity: 0.8; }

/* Post main */
.post-main {
  padding: 60px 80px 100px 60px;
  max-width: calc(var(--max-prose) + 140px);
}

.post-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.post-series {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.post-title {
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  max-width: var(--max-prose);
}

.post-byline {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
}

.post-byline .author { color: var(--ink); }
.post-byline .sep { opacity: 0.3; }

/* Prose */
.post-body {
  max-width: var(--max-prose);
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--ink);
}

.post-body h2 {
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.3;
  margin: 52px 0 16px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.post-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 32px 0 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.post-body p { margin-bottom: 1.4em; }

.post-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--line-mid);
}

.post-body a:hover {
  text-decoration-color: var(--ink);
  opacity: 1;
}

.post-body blockquote {
  border-left: 3px solid var(--ink);
  margin: 2em 0;
  padding: 4px 0 4px 24px;
  color: var(--muted-mid);
  font-style: italic;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--paper-dim);
  padding: 2px 6px;
  border: 1px solid var(--line);
}

.post-body pre {
  background: var(--ink);
  color: #dcdcdc;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 2em 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

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

.post-body ul, .post-body ol {
  margin: 0 0 1.4em 1.5em;
}

.post-body li { margin-bottom: 0.4em; }

.post-body hr {
  border: none;
  border-top: 1px solid var(--line-mid);
  margin: 3em 0;
}

.post-body strong { font-weight: 700; }
.post-body em { font-style: italic; }

/* Post footer */
.post-footer {
  max-width: var(--max-prose);
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line-mid);
  font-family: var(--font-mono);
}

.post-footer-label {
  font-size: 8px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.post-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.post-footer-link {
  font-size: 11px;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line-mid);
  padding-bottom: 2px;
}

.post-footer-link:hover { opacity: 1; border-color: var(--ink); }

/* ─── ADMIN EDITOR ────────────────────────────────────────────────────── */
.admin-layout {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 40px 100px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-mid);
}

.admin-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.admin-status {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.field-group {
  margin-bottom: 20px;
}

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-mid);
  margin-bottom: 6px;
}

.field-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--line-mid);
  background: #fff;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.field-input:focus { border-color: var(--ink); }

.field-input.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.editor-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px 12px;
  background: var(--paper-dim);
  border: 1px solid var(--line-mid);
  border-bottom: none;
  flex-wrap: wrap;
}

.toolbar-btn {
  padding: 4px 10px;
  background: none;
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted-mid);
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: all 0.15s;
}

.toolbar-btn:hover {
  border-color: var(--line-mid);
  color: var(--ink);
  background: #fff;
}

.toolbar-sep {
  width: 1px;
  background: var(--line-mid);
  margin: 2px 4px;
}

#md-editor {
  width: 100%;
  min-height: 480px;
  padding: 20px;
  border: 1px solid var(--line-mid);
  background: #fff;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink);
  outline: none;
  resize: vertical;
  box-sizing: border-box;
  tab-size: 2;
}

#md-editor:focus { border-color: var(--ink); }

.editor-meta-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.admin-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.btn-publish {
  padding: 12px 28px;
  background: var(--ink);
  color: #dcdcdc;
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-publish:hover { background: #333; }
.btn-publish:disabled { opacity: 0.4; cursor: default; }

.btn-preview {
  padding: 12px 20px;
  background: none;
  color: var(--ink);
  border: 1px solid var(--line-mid);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s;
}

.btn-preview:hover { border-color: var(--ink); }

.btn-save-draft {
  padding: 12px 20px;
  background: none;
  color: var(--muted-mid);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
}

.btn-save-draft:hover { color: var(--ink); border-color: var(--line-mid); }

.publish-result {
  margin-top: 16px;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  display: none;
}

.publish-result.success { background: #e8f5e9; color: #1a6a3a; border: 1px solid #1a6a3a; }
.publish-result.error   { background: #fce8e8; color: #8a1a1a; border: 1px solid #8a1a1a; }

/* Preview pane */
.preview-pane {
  display: none;
  margin-top: 32px;
  border: 1px solid var(--line-mid);
  padding: 40px;
  background: var(--paper);
}

.preview-pane.visible { display: block; }

.preview-label {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

/* Post list in admin */
.admin-post-list {
  margin-top: 48px;
}

.admin-post-list-header {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.admin-post-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  gap: 16px;
}

.admin-post-item-title { flex: 1; }
.admin-post-item-date { color: var(--muted); font-size: 9px; white-space: nowrap; }

.admin-post-actions {
  display: flex;
  gap: 12px;
}

.admin-post-actions button {
  background: none;
  border: none;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  cursor: pointer;
  text-decoration: underline;
  color: var(--muted-mid);
  padding: 0;
}

.admin-post-actions button:hover { color: var(--ink); }
.admin-post-actions .btn-delete { color: #8a3a1a; }
.admin-post-actions .btn-delete:hover { color: #8a1a1a; }

/* ─── RESPONSIVE ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .blog-site-header { padding: 12px 20px; }
  .blog-index { padding: 40px 20px 80px; }
  .post-layout { grid-template-columns: 1fr; }
  .post-sidebar { display: none; }
  .post-main { padding: 40px 24px 80px; }
  .post-title { font-size: 1.5rem; }
  .editor-meta-row { grid-template-columns: 1fr; }
  .admin-layout { padding: 32px 20px 80px; }
}