/*
Theme Name: blog5
Version: 1.0
Description: Classic professional editorial theme for blog5
Author: blog5
*/

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,800;1,400;1,700&family=Source+Sans+3:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* ── Variables ──────────────────────────────────────────── */
:root {
  --bg: #FAFAF7;
  --surface: #FFFFFF;
  --surface2: #F4F3EF;
  --border: #E2DED8;
  --border-dark: #C8C4BE;
  --text: #1C1917;
  --text-muted: #78716C;
  --text-light: #A8A29E;
  --accent: #1D4ED8;
  --accent-hover: #1E40AF;
  --accent-dim: rgba(29,78,216,.07);
  --accent-glow: rgba(29,78,216,.15);
  --cat-bg: #F5F0EB;
  --cat-text: #92400E;
  --radius: 4px;
  --radius-md: 8px;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Source Sans 3', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--surface2); }
::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 3px; }
::selection { background: var(--accent-dim); color: var(--accent); }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── Layout ─────────────────────────────────────────────── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }

/* ── Top Bar ────────────────────────────────────────────── */
.top-bar { display: none; }
/* old: //
  background: var(--text);
  color: #fff;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .03em;
  padding: .4rem 0;
  text-align: center;
}
.top-bar a { color: rgba(255,255,255,.7); transition: color .15s; }
.top-bar a:hover { color: #fff; }

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  position: relative;
  background: var(--surface);
  border-bottom: 3px solid var(--text);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  max-width: 1180px;
  margin: 0 auto;
  gap: 2rem;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--text);
  line-height: 1;
  flex-shrink: 0;
}
.site-logo-img {
  height: 40px;
  width: auto;
  max-width: 350px;
  max-height: 40px;
  object-fit: contain;
  margin-top: 4px;
}

.header-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: .9rem;
  color: var(--text-muted);
  border-left: 2px solid var(--border);
  padding-left: 1.25rem;
  max-width: 280px;
  line-height: 1.5;
}

.site-nav {
  border-top: 1px solid var(--border);
}

.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-links { display: flex; }
.nav-links li a {
  display: block;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text);
  padding: .75rem 1.1rem;
  border-right: 1px solid var(--border);
  transition: background .15s, color .15s;
}
.nav-links li:first-child a { border-left: 1px solid var(--border); }
.nav-links li a:hover { background: var(--surface2); color: var(--accent); }

.menu-toggle { display: none; }
.mobile-nav { display: none; }
.mobile-nav.open { display: flex; flex-direction: column; }

/* ── Hero ───────────────────────────────────────────────── */
.hero-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
}

.hero-featured {
  border: 1px solid var(--border);
}

.hero-featured-img {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--surface2);
  background-size: cover;
  background-position: center;
}

.hero-featured-body {
  padding: 1.75rem;
}

.hero-category {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: .6rem;
  display: block;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}

.hero-excerpt {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-light);
  padding-top: .75rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: .75rem;
  align-items: center;
}

.hero-meta .read-more {
  color: var(--accent);
  font-weight: 500;
  margin-left: auto;
}

/* Hero sidebar */
.hero-sidebar { display: flex; flex-direction: column; gap: 1px; background: white; }
.hero-sidebar-item {
  background: var(--surface);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  transition: background .15s;
}
.hero-sidebar-item:hover { background: var(--surface2); }
.hero-sidebar-item h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}
.hero-sidebar-item .hero-meta {
  border: none;
  padding: 0;
  font-size: .7rem;
  color: var(--text-light);
}

/* ── Section ────────────────────────────────────────────── */
.content-section { padding: 3rem 0; }

.section-divider {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -.02em;
}

.section-rule {
  flex: 1;
  height: 2px;
  background: var(--border);
  position: relative;
}

.section-rule::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
}

.section-link {
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent);
  white-space: nowrap;
  transition: opacity .15s;
  flex-shrink: 0;
}
.section-link:hover { opacity: .7; }

/* ── Article Grid ───────────────────────────────────────── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card { display: flex; flex-direction: column; gap: 0; }

.article-img {
  aspect-ratio: 4/3;
  background: var(--surface2);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
  margin-bottom: 1rem;
  transition: border-color .2s;
}
.article-card:hover .article-img { border-color: var(--accent); }

.article-cat {
  font-family: var(--font-mono);
  font-size: .65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  margin-bottom: .35rem;
  display: block;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  letter-spacing: -.01em;
  margin-bottom: .5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--text-light);
  margin-top: auto;
  padding-top: .5rem;
}

/* ── Two Column Layout ──────────────────────────────────── */
.two-col-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 3rem;
}

.main-articles { display: flex; flex-direction: column; gap: 2rem; }

.list-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.25rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.list-card:last-child { border-bottom: none; }

.list-card-img {
  aspect-ratio: 4/3;
  background: var(--surface2);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.list-card-body { display: flex; flex-direction: column; gap: .35rem; }
.list-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  letter-spacing: -.01em;
}
.list-card-body h3 a:hover { color: var(--accent); }
.list-card-body .article-meta { padding-top: .25rem; }

/* Sidebar */
.sidebar-box {
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--surface);
  background: var(--text);
  padding: .6rem 1rem;
  margin: 0;
}

.sidebar-box ul { padding: .75rem 1rem; display: flex; flex-direction: column; gap: .5rem; }
.sidebar-box ul li {
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
  font-size: .875rem;
}
.sidebar-box ul li:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-box ul li a { color: var(--text); line-height: 1.5; }
.sidebar-box ul li a:hover { color: var(--accent); }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer {
  border-top: 3px solid var(--text);
  background: var(--surface);
  margin-top: 3rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.footer-brand .site-logo { font-size: 1.8rem; margin-bottom: .75rem; display: inline-block; }
.footer-tagline { font-size: .875rem; color: var(--text-muted); line-height: 1.65; max-width: 260px; }

.footer-heading {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text);
  margin-bottom: .75rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
}

.footer-col ul { display: flex; flex-direction: column; gap: .4rem; }
.footer-col ul li a { font-size: .875rem; color: var(--text-muted); }
.footer-col ul li a:hover { color: var(--accent); }

.footer-bottom {
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--text-light);
}

/* ── Single Article ─────────────────────────────────────── */
/* ── Single Article ─────────────────────────────────────── */
.single-featured-image {
  width: 100%;
  aspect-ratio: 21/9;
  background: var(--surface2);
  background-size: cover;
  background-position: center;
}

.single-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3.5rem;
  max-width: 1140px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
  align-items: start;
}

.single-main { min-width: 0; }

.back-link {
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  transition: color .15s;
}
.back-link:hover { color: var(--accent); }

.single-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -.03em;
  margin-bottom: 1rem;
}

.single-meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: .75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  margin-bottom: 2rem;
}

.single-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text);
}

.single-content p { margin-bottom: 1.5rem; }
.single-content h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin: 2.5rem 0 1rem;
  letter-spacing: -.02em;
  scroll-margin-top: 80px;
}
.single-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 2rem 0 .75rem;
  scroll-margin-top: 80px;
}
.single-content ul, .single-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  list-style: none;
}
.single-content li {
  margin-bottom: .5rem;
  padding-left: 1rem;
  position: relative;
}
.single-content ul li::before { content: '—'; position: absolute; left: -1rem; color: var(--accent); }
.single-content ol { counter-reset: list-counter; }
.single-content ol li { counter-increment: list-counter; }
.single-content ol li::before { content: counter(list-counter) '.'; position: absolute; left: -1.5rem; font-family: var(--font-mono); font-size: .85em; color: var(--accent); }
.single-content strong { font-weight: 600; color: var(--text); }
.single-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.single-content blockquote {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--accent);
  background: var(--surface2);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text);
  line-height: 1.6;
}

/* Sidebar */
.single-sidebar {
  position: sticky;
  top: 1.5rem;
}

.sidebar-box {
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.sidebar-box-title {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text);
  padding: .6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

/* TOC in sidebar */
.toc-box .toc { padding: .75rem 1rem; }
.toc ol { list-style: none; counter-reset: toc-counter; padding: 0; margin: 0; }
.toc-item { counter-increment: toc-counter; margin-bottom: .2rem; }
.toc-item a {
  font-size: .8rem;
  color: var(--text-muted);
  display: flex;
  align-items: baseline;
  gap: .4rem;
  padding: .25rem .35rem;
  border-radius: 3px;
  transition: color .15s, background .15s;
}
.toc-item a:hover { color: var(--accent); background: var(--surface2); }
.toc-item a::before { content: counter(toc-counter, decimal-leading-zero) '.'; font-family: var(--font-mono); font-size: .68rem; color: var(--text-light); flex-shrink: 0; }

/* Author in sidebar */
.author-sidebar { padding: 1rem; display: flex; flex-direction: column; gap: .75rem; }
.author-avatar-lg {
  width: 48px;
  height: 48px;
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}
.author-sidebar-name { font-family: var(--font-serif); font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: .4rem; }
.author-sidebar-bio { font-size: .8rem; color: var(--text-muted); line-height: 1.65; margin: 0; }

/* ── Author Box (fallback) ─────────────────────────────── */
.author-box {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  padding: 1.5rem;
  margin-top: 3rem;
}
.author-avatar {
  width: 56px;
  height: 56px;
  min-width: 56px;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}
.author-info { flex: 1; }
.author-label { font-family: var(--font-mono); font-size: .68rem; font-weight: 500; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-bottom: .2rem; }
.author-name { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: .3rem; }
.author-bio { font-size: .875rem; color: var(--text-muted); line-height: 1.65; margin: 0; }

/* ── Related Posts ─────────────────────────────────────── */
.related-posts { margin-top: 3rem; padding-top: 2rem; border-top: 2px solid var(--border); }
.related-title { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 700; color: var(--text); margin-bottom: 1.25rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.related-card { display: block; border: 1px solid var(--border); transition: border-color .2s; }
.related-card:hover { border-color: var(--accent); }
.related-img { height: 130px; background: var(--surface2); background-size: cover; background-position: center; }
.related-body { padding: 1rem; }
.related-date { font-family: var(--font-mono); font-size: .7rem; color: var(--text-light); }
.related-body h4 { font-family: var(--font-serif); font-size: .95rem; font-weight: 600; color: var(--text); margin-top: .3rem; line-height: 1.35; }

/* ── Archive ───────────────────────────────────────────── */
.archive-header { padding: 3rem 0 2rem; border-bottom: 2px solid var(--border); margin-bottom: 0; }
.archive-header .container { max-width: 860px; }
.archive-header h1 { font-family: var(--font-serif); font-size: 2.25rem; font-weight: 800; color: var(--text); letter-spacing: -.03em; margin-bottom: .5rem; }
.archive-header p { color: var(--text-muted); font-size: .95rem; }
.archive-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; padding: 3rem 0; }

/* ── Page ───────────────────────────────────────────────── */
.page-header { padding: 2.5rem 0 1.5rem; border-bottom: 2px solid var(--border); }
.page-header h1 { font-family: var(--font-serif); font-size: 2rem; font-weight: 800; color: var(--text); letter-spacing: -.03em; }
.page-content { max-width: 720px; margin: 0 auto; padding: 2.5rem 0; font-size: 1rem; line-height: 1.8; }
.page-content h2 { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 700; color: var(--text); margin: 2rem 0 .75rem; letter-spacing: -.02em; }
.page-content h3 { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 600; color: var(--text); margin: 1.5rem 0 .5rem; }
.page-content p { margin-bottom: 1.25rem; }
.page-content ul { margin: 1rem 0 1.25rem 1.5rem; list-style: none; }
.page-content ul li { margin-bottom: .4rem; padding-left: 1rem; position: relative; }
.page-content ul li::before { content: '—'; position: absolute; left: -1rem; color: var(--accent); }
.page-content a { color: var(--accent); text-decoration: underline; }
.page-content strong { font-weight: 600; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-sidebar { flex-direction: row; }
  .hero-sidebar-item { flex: 1; }
  .single-layout { grid-template-columns: 1fr; }
  .single-toc { display: none; }
  .two-col-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .site-nav { display: none; }
  .menu-toggle { display: flex !important; position: absolute; top: 50%; right: 1rem; transform: translateY(-50%); background: rgba(0,0,0,.08); border: none; cursor: pointer; padding: .6rem .5rem; border-radius: 4px; align-items: center; justify-content: center; color: var(--text); }
  .mobile-nav-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 998; }
  .mobile-nav { display: none; position: fixed; top: 0; right: 0; bottom: 0; width: 280px; background: var(--surface); z-index: 999; padding: 4rem 1.5rem 2rem; overflow-y: auto; box-shadow: -2px 0 8px rgba(0,0,0,.1); }
  .mobile-nav.open { display: flex; flex-direction: column; }
  .header-main { flex-direction: column; text-align: center; gap: .75rem; }
  .header-tagline { border: none; padding: 0; max-width: 100%; text-align: center; }
  .nav-inner { overflow-x: auto; }
  .hero-sidebar { flex-direction: column; }
  .article-grid { grid-template-columns: 1fr; }
  .list-card { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .related-grid { grid-template-columns: 1fr; }
  .archive-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .header-main { padding: 1rem 1.25rem; }
  .footer-top { grid-template-columns: 1fr; }
  .single-featured-image { aspect-ratio: 16/9; }
}