/* ═══════════════════════════════════════════════
   SANTOLAYA BLOG — Main Stylesheet
   ═══════════════════════════════════════════════ */

:root {
  --color-black:    #0A0A0A;
  --color-white:    #FFFFFF;
  --color-gold:     #C8A96E;
  --color-dark:     #1A1A1A;
  --color-gray:     #F5F5F3;
  --color-text:     #2C2C2C;
  --color-muted:    #888888;
  --color-border:   #E0E0DC;
  --font-sans:      'Inter', system-ui, -apple-system, sans-serif;
  --font-display:   'Playfair Display', Georgia, serif;
  --radius:         4px;
  --max-width:      1200px;
  --transition:     0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── READING PROGRESS ─── */
#reading-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 1000;
  background: transparent;
}
#reading-bar {
  height: 100%;
  width: 0;
  background: var(--color-gold);
  transition: width 0.1s linear;
}

/* ─── HEADER ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: 72px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
.site-header.hidden { transform: translateY(-100%); }

.header-inner {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-img {
  display: block;
  height: 38px;
  width: auto;
  object-fit: contain;
}
.logo-img--footer {
  height: 32px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
.logo-blog-label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-left: 0.25rem;
  border-left: 1px solid rgba(200,169,110,0.4);
  padding-left: 0.5rem;
}

.site-nav { flex: 1; }
.site-nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}
.site-nav a {
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover {
  color: var(--color-black);
  border-bottom-color: var(--color-gold);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-shrink: 0;
}

.search-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  padding: 0.25rem;
  transition: color var(--transition);
}
.search-toggle:hover { color: var(--color-gold); }

.back-link {
  font-size: 0.8rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}
.back-link:hover { color: var(--color-gold); }

.search-bar {
  background: var(--color-dark);
  border-top: 1px solid rgba(200,169,110,0.2);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.search-bar.open { max-height: 80px; }

.header-search-form {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}
.header-search-form input {
  flex: 1;
  background: none;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.5rem 0;
  outline: none;
}
.header-search-form input::placeholder { color: rgba(255,255,255,0.4); }
.header-search-form button {
  background: none;
  border: none;
  color: var(--color-gold);
  font-size: 1.25rem;
  cursor: pointer;
}

/* ─── HERO SECTION ─── */
.hero-section {
  background: var(--color-black);
  padding: 3rem 0 2rem;
}
.hero-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.hero-image-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  max-height: 520px;
}
.hero-img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  display: block;
}
.hero-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 2rem 2.5rem;
  background: linear-gradient(to top, rgba(10,10,10,0.92) 0%, rgba(10,10,10,0.5) 60%, transparent 100%);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: var(--color-white);
  line-height: 1.2;
  margin: 0.75rem 0;
}
.hero-title a { color: inherit; }
.hero-title a:hover { color: var(--color-gold); }
.hero-excerpt {
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  max-width: 65ch;
  margin-bottom: 0.75rem;
}
.hero-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

/* ─── PAGE LAYOUT ─── */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  padding-top: 3rem;
  padding-bottom: 4rem;
}

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

/* ─── POSTS GRID ─── */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 3rem;
}

.post-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  background: var(--color-white);
}
.post-card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.card-img-link { display: block; overflow: hidden; }
.card-img-link img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.card-img-link:hover img { transform: scale(1.04); }
.card-img-placeholder {
  width: 100%;
  height: 200px;
  background: var(--color-gray);
}

.card-body { padding: 1.25rem; }

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-black);
  background: var(--color-gold);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  margin-bottom: 0.6rem;
}

.card-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}
.card-body h3 a:hover { color: var(--color-gold); }

.excerpt {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
}

/* ─── SIDEBAR ─── */
.sidebar { min-width: 0; }

.sidebar-widget {
  background: var(--color-gray);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar-widget h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-black);
  border-bottom: 2px solid var(--color-gold);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.cat-list { list-style: none; }
.cat-list li { border-bottom: 1px solid var(--color-border); }
.cat-list li:last-child { border-bottom: none; }
.cat-list a {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--color-text);
  transition: color var(--transition);
}
.cat-list a:hover { color: var(--color-gold); }
.cat-list span { color: var(--color-muted); font-size: 0.8rem; }

.top-posts-list { list-style: none; counter-reset: item; }
.top-posts-list li {
  counter-increment: item;
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.top-posts-list li:last-child { border-bottom: none; }
.top-posts-list li::before {
  content: counter(item);
  min-width: 1.5rem;
  height: 1.5rem;
  background: var(--color-gold);
  color: var(--color-black);
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.top-posts-list a {
  font-size: 0.85rem;
  line-height: 1.4;
  transition: color var(--transition);
}
.top-posts-list a:hover { color: var(--color-gold); }

.cta-widget { background: var(--color-black); }
.cta-widget h3 { color: var(--color-white); border-color: var(--color-gold); }
.cta-widget p { color: rgba(255,255,255,0.7); font-size: 0.875rem; margin-bottom: 1rem; }

/* ─── BUTTONS ─── */
.btn-gold {
  display: inline-block;
  background: var(--color-gold);
  color: var(--color-black);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}
.btn-gold:hover {
  background: #d4b47c;
  transform: translateY(-1px);
}

/* ─── PAGINATION ─── */
.pagination {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
}
.page-btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--color-text);
  transition: all var(--transition);
}
.page-btn:hover { background: var(--color-gold); color: var(--color-black); }
.pagination span { font-size: 0.875rem; color: var(--color-muted); }

/* ─── POST HERO ─── */
.post-hero {
  position: relative;
  min-height: 420px;
  background: var(--color-black);
  overflow: hidden;
}
.post-hero-img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  opacity: 0.55;
}
.post-hero-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 3rem 0 2.5rem;
  background: linear-gradient(to top, rgba(10,10,10,0.9) 0%, transparent 100%);
}
.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 3rem);
  color: var(--color-white);
  line-height: 1.15;
  margin: 0.75rem 0;
  max-width: 800px;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* ─── POST LAYOUT ─── */
.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 720px) 280px;
  gap: 3rem;
  padding-top: 3rem;
  padding-bottom: 4rem;
}

/* ─── POST CONTENT ─── */
.post-content { min-width: 0; }

.post-body {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
}
.post-body h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-black);
  margin: 2.5rem 0 1rem;
  line-height: 1.25;
}
.post-body h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--color-black);
  margin: 2rem 0 0.75rem;
}
.post-body p { margin-bottom: 1.5rem; }
.post-body ul, .post-body ol { padding-left: 2rem; margin-bottom: 1.5rem; }
.post-body li { margin-bottom: 0.5rem; }
.post-body blockquote {
  border-left: 4px solid var(--color-gold);
  padding-left: 1.5rem;
  color: var(--color-muted);
  font-style: italic;
  margin: 1.5rem 0;
}
.post-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1.5rem auto;
}
.post-body a { color: var(--color-gold); border-bottom: 1px solid rgba(200,169,110,0.3); }
.post-body a:hover { border-bottom-color: var(--color-gold); }
.post-body strong { color: var(--color-black); font-weight: 600; }
.post-body code {
  font-size: 0.875em;
  background: var(--color-gray);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

/* ─── TAGS ─── */
.tags-section {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}
.tag {
  display: inline-block;
  font-size: 0.8rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  transition: all var(--transition);
}
.tag:hover { border-color: var(--color-gold); color: var(--color-gold); }

/* ─── SHARE ─── */
.share-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin: 1.5rem 0;
  flex-wrap: wrap;
}
.share-bar span { font-size: 0.875rem; color: var(--color-muted); font-weight: 500; }
.share-btn {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  transition: opacity var(--transition);
}
.share-btn:hover { opacity: 0.85; }
.share-btn.whatsapp { background: #25D366; color: #fff; }
.share-btn.linkedin { background: #0A66C2; color: #fff; }
.share-btn.twitter { background: var(--color-black); color: #fff; }

/* ─── POST NAV ─── */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 2.5rem 0;
}
.post-nav-prev, .post-nav-next {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.4;
  transition: all var(--transition);
}
.post-nav-prev:hover, .post-nav-next:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}
.post-nav-next { text-align: right; }

/* ─── RELATED POSTS ─── */
.related-posts { margin-top: 2.5rem; }
.related-posts h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--color-gold);
  padding-bottom: 0.5rem;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.related-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.related-card:hover { border-color: var(--color-gold); transform: translateY(-2px); }
.related-card img { width: 100%; height: 120px; object-fit: cover; }
.related-body { padding: 0.75rem; }
.related-body h4 { font-size: 0.875rem; line-height: 1.3; margin-bottom: 0.25rem; }
.related-body h4 a:hover { color: var(--color-gold); }
.related-body span { font-size: 0.75rem; color: var(--color-muted); }

/* ─── POST SIDEBAR ─── */
.post-sidebar { position: sticky; top: 90px; height: fit-content; }

/* ─── PAGE HEADER ─── */
.page-header {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2.5rem;
}
.page-header h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  margin: 0.5rem 0;
}
.page-desc { color: var(--color-muted); font-size: 1rem; margin-top: 0.5rem; }
.posts-count { font-size: 0.875rem; color: var(--color-muted); margin-top: 0.25rem; }
.breadcrumb-link { font-size: 0.875rem; color: var(--color-muted); }
.breadcrumb-link:hover { color: var(--color-gold); }

/* ─── SEARCH ─── */
.search-form {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}
.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--color-gold); }
.search-results-info { margin-bottom: 1.5rem; color: var(--color-muted); font-size: 0.9rem; }
.search-results-info strong { color: var(--color-text); }
.no-results { text-align: center; color: var(--color-muted); padding: 3rem 0; font-size: 1.1rem; }

/* ─── FOOTER ─── */
.site-footer {
  background: var(--color-black);
  color: rgba(255,255,255,0.7);
  margin-top: 4rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 2rem;
  padding: 3rem 1.5rem;
}
.footer-logo { margin-bottom: 0.75rem; }
.footer-tagline { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-nav ul { list-style: none; }
.footer-nav li { margin-bottom: 0.5rem; }
.footer-nav a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-nav a:hover { color: var(--color-gold); }
.footer-social { display: flex; gap: 1rem; align-items: flex-start; }
.social-link { color: rgba(255,255,255,0.5); transition: color var(--transition); }
.social-link:hover { color: var(--color-gold); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 1.25rem 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--color-gold); }

/* ─── RESPONSIVE ─── */
@media (max-width: 1024px) {
  .page-layout { grid-template-columns: 1fr; }
  .post-layout { grid-template-columns: 1fr; }
  .posts-grid { grid-template-columns: repeat(2, 1fr); }
  .post-sidebar { position: static; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .site-nav { display: none; }
  .posts-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .hero-section { padding: 1.5rem 0 1rem; }
  .hero-img { height: 280px; }
  .post-hero-img { height: 280px; }
  .footer-inner { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .post-title { font-size: 1.5rem; }
}

/* ─── UTILITIES ─── */
.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-muted); }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }

/* ─── TABLE OF CONTENTS ─── */
.toc-box {
  background: #f8f6f0;
  border: 1px solid #e8e0d0;
  border-left: 3px solid var(--color-gold);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}
.toc-box h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-text);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.toc-box ol {
  margin: 0;
  padding-left: 1.25rem;
  list-style: decimal;
}
.toc-box li {
  margin: 0.3rem 0;
  font-size: 0.9rem;
  line-height: 1.5;
}
.toc-box a {
  color: var(--color-text);
  text-decoration: none;
}
.toc-box a:hover {
  color: var(--color-gold);
  text-decoration: underline;
}