/* ── FONTS ── */
@font-face {
  font-family: 'Playfair Display';
  src: url('../fonts/PlayfairDisplay-VariableFont_wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: block;
}

@font-face {
  font-family: 'Playfair Display';
  src: url('../fonts/PlayfairDisplay-Italic-VariableFont_wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: italic;
  font-display: block;
}

@font-face {
  font-family: 'Urbanist';
  src: url('../fonts/Urbanist-VariableFont_wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: block;
}

@font-face {
  font-family: 'Urbanist';
  src: url('../fonts/Urbanist-Italic-VariableFont_wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: italic;
  font-display: block;
}

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

/* ── VARIABLES ── */
:root {
  --bg:         #f7f6f2;
  --surface:    #ffffff;
  --ink:        #1a1a18;
  --ink-muted:  #3a3a38;
  --accent:     #336699;
  --accent-lt:  #e8f0f8;
  --border:     #e2e0d8;
  --tag-bg:     #ddeaf6;
  --tag-ink:    #336699;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Urbanist', system-ui, sans-serif;
  --max-w:      1200px;
  --gap:        2.5rem;
}

/* ── BASE ── */
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── SITE HEADER ── */
.site-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.site-logo span { color: #336699; font-style: italic; }

.site-nav a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.site-nav a:hover { color: var(--ink); }

/* ── SECTION LABELS ── */
.hero-label,
.section-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-label::before,
.section-label::before {
  content: '';
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: #336699;
}

/* ── HERO ── */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  border-bottom: 1px solid var(--border);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.hero-excerpt {
  font-size: 1rem;
  color: var(--ink-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
  text-align: justify;
}

.hero-meta {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ── TAGS ── */
.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-ink);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
}

/* ── READ LINK ── */
.read-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #336699;
  text-decoration: none;
  border-bottom: 1px solid #336699;
  padding-bottom: 1px;
  transition: opacity 0.2s;
}

.read-link:hover { opacity: 0.55; }
.read-link:hover svg { transform: translateX(3px); }
.read-link svg { transition: transform 0.2s; }

/* ── POST GRID ── */
.posts-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.post-card {
  background: var(--surface);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s, border-left 0.2s;
}

.post-card:hover {
  background: var(--accent-lt);
  border-left: 3px solid var(--accent);
}

.post-card-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--ink);
}

.post-card-excerpt {
  font-size: 0.85rem;
  color: var(--ink-muted);
  line-height: 1.65;
  flex: 1;
  text-align: justify;
}

.post-card-date {
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  margin-top: 0.5rem;
}

/* ── BIO ── */
.bio-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 3rem;
  align-items: start;
}

.bio-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding-top: 0.2rem;
}

.bio-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--ink);
}

.bio-text {
  font-size: 1rem;
  color: var(--ink-muted);
  line-height: 1.75;
  max-width: 700px;
  text-align: justify;
}

.bio-text p + p { margin-top: 0.85rem; }

.bio-linkedin {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: #336699;
  text-decoration: none;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: border-color 0.2s, color 0.2s;
}

.bio-linkedin:hover {
  color: var(--ink-muted);
  border-color: var(--ink-muted);
}

/* ── FOOTER ── */
.site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
}

.post-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 2.5rem;
  border-bottom: 1px solid var(--border);
}

.post-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #336699;
  text-decoration: none;
  border-bottom: 1px solid #336699;
  padding-bottom: 1px;
  margin-bottom: 2rem;
  transition: opacity 0.2s;
}

.post-breadcrumb:hover { opacity: 0.55; }
.post-breadcrumb:hover svg { transform: translateX(-3px); }
.post-breadcrumb svg { transition: transform 0.2s; }

.post-meta {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 1.25rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.post-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: var(--max-w);
}

.post-excerpt {
  margin-top: 1.25rem;
  font-size: 1.05rem;
  color: var(--ink-muted);
  line-height: 1.75;
  max-width: var(--max-w);
}

/* ── ARTICLE BODY ── */
.post-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 4rem;
  align-items: start;
}

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

.post-content p {
  font-size: 1rem;
  color: var(--ink-muted);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

.post-content h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  line-height: 1.2;
  color: var(--ink);
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--ink);
  margin: 2rem 0 0.75rem;
}

.post-content strong {
  font-weight: 600;
  color: var(--ink);
}

/* ── SIDEBAR ── */
.post-sidebar {
  position: sticky;
  top: 2rem;
}

.sidebar-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-label::before {
  content: '';
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: #336699;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toc-list a {
  font-size: 0.82rem;
  color: var(--ink-muted);
  text-decoration: none;
  line-height: 1.45;
  transition: color 0.2s;
  display: block;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border);
}

.toc-list a:hover {
  color: #336699;
  border-left-color: #336699;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero          { animation: fadeUp 0.55s ease both; }
.posts-section { animation: fadeUp 0.55s 0.1s ease both; }
.bio-section   { animation: fadeUp 0.55s 0.2s ease both; }
.post-header { animation: fadeUp 0.55s ease both; }
.post-body   { animation: fadeUp 0.55s 0.1s ease both; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .hero            { grid-template-columns: 1fr; gap: 1.5rem; }
  .bio-section     { grid-template-columns: 1fr; gap: 1rem; }
  .site-header     { flex-direction: column; gap: 0.75rem; }
}

@media (max-width: 820px) {
  .post-body { grid-template-columns: 1fr; }
  .post-sidebar { display: none; }
}