/* ===== PrivBlog – Wordsmith-Inspired Magazine Design ===== */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&family=Inter:wght@300;400;500;600;700&family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,700&display=swap');

:root {
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --color-bg: #f4f4f4;
  --color-surface: #ffffff;
  --color-surface-alt: #ebebeb;
  --color-border: #e5e5e5;

  --color-text: #151515;
  --color-text-secondary: #707070;
  --color-text-muted: #999999;

  --color-accent: #276bae;
  --color-accent-hover: #1a528a;
  --color-accent-light: #e8f0f9;

  --color-gold: #c8a462;
  --color-gold-light: #f5edd9;

  --color-cat-design: #276bae;
  --color-cat-tech: #d93b4d;
  --color-cat-tutorial: #10b981;
  --color-cat-news: #c8a462;
  --color-cat-opinion: #8b5cf6;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
}

/* --- Base --- */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--color-accent); }

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

.container { max-width: 1200px; }

/* --- Navigation --- */
.navbar {
  background: #151515 !important;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1030;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 60px;
}

.navbar-brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff !important;
  letter-spacing: -0.02em;
}

.navbar-brand i {
  font-size: 1.2rem;
  margin-right: 0.4rem;
  color: var(--color-gold);
}

.nav-link {
  color: rgba(255, 255, 255, 0.75) !important;
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.5rem 1rem !important;
  transition: color 0.2s;
}

.nav-link:hover { color: #fff !important; }

.nav-link i { margin-right: 0.3rem; }

.navbar .btn-outline-light {
  color: rgba(255, 255, 255, 0.75);
  border-color: rgba(255, 255, 255, 0.2);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 1rem;
  border-radius: 0;
}

.navbar .btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

/* --- Hero Carousel --- */
.hero-section {
  margin-bottom: 3rem;
}

.hero-section .carousel,
.hero-section .carousel-inner,
.hero-section .carousel-item {
  height: 480px;
}

.hero-section .carousel a {
  color: #fff;
}

.hero-section .carousel-caption {
  text-align: left;
  padding: 3rem 4rem !important;
}

.hero-section .carousel-indicators {
  margin-bottom: 1rem;
}

.hero-section .carousel-indicators button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin: 0 4px;
  background: rgba(255,255,255,0.5);
  border: none;
}

.hero-section .carousel-indicators button.active {
  background: var(--color-gold);
  width: 24px;
  border-radius: 4px;
}

@media (max-width: 767.98px) {
  .hero-section .carousel,
  .hero-section .carousel-inner,
  .hero-section .carousel-item {
    height: 320px;
  }
  .hero-section .carousel-caption {
    padding: 1.5rem !important;
  }
  .hero-section .carousel-caption h2 {
    font-size: 1.25rem !important;
  }
}

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

.post-grid .grid-item {
  background: var(--color-surface);
  transition: opacity 0.3s;
}

.post-grid .grid-item:hover {
  opacity: 0.92;
}

.grid-item .entry-thumb {
  position: relative;
  overflow: hidden;
}

.grid-item .entry-thumb img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.grid-item:hover .entry-thumb img {
  transform: scale(1.03);
}

.entry-cat {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.7rem;
  color: #fff;
  z-index: 2;
}

.entry-cat.color-1 { background: var(--color-cat-design); }
.entry-cat.color-2 { background: var(--color-cat-tech); }
.entry-cat.color-3 { background: var(--color-cat-tutorial); }
.entry-cat.color-4 { background: var(--color-cat-news); }
.entry-cat.color-5 { background: var(--color-cat-opinion); }

.grid-item .entry-text {
  padding: 1.25rem 1.5rem 1.5rem;
}

.grid-item .entry-text h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

.grid-item .entry-text h3 a { color: var(--color-text); }
.grid-item .entry-text h3 a:hover { color: var(--color-accent); }

.grid-item .entry-text .entry-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.grid-item .entry-text .entry-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  line-height: 1.6;
}

/* --- Sidebar --- */
.sidebar-section {
  margin-bottom: 2.5rem;
}

.sidebar-title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-text);
}

/* Popular Posts List */
.popular-list { list-style: none; padding: 0; margin: 0; }

.popular-list li {
  display: flex;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-border);
}

.popular-list li:first-child { padding-top: 0; }
.popular-list li:last-child { border-bottom: none; padding-bottom: 0; }

.popular-list .pop-thumb {
  width: 72px;
  height: 72px;
  object-fit: cover;
  flex-shrink: 0;
}

.popular-list .pop-text h6 {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 0.25rem;
}

.popular-list .pop-text h6 a { color: var(--color-text); }
.popular-list .pop-text h6 a:hover { color: var(--color-text); opacity: 0.7; }

.popular-list .pop-text .pop-meta {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

/* Tag Cloud */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.tag-cloud a {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.25rem 0.65rem;
  background: var(--color-surface-alt);
  color: var(--color-text);
  transition: all 0.2s;
}

.tag-cloud a:hover {
  background: var(--color-text);
  color: #fff;
}

/* --- Section Title --- */
.section-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title small {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

/* --- Pagination --- */
.pagination-wrap {
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  margin-top: 3rem;
}

.pagination-wrap a,
.pagination-wrap span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  transition: all 0.2s;
}

.pagination-wrap a:hover {
  background: var(--color-text);
  color: #fff;
}

.pagination-wrap .active {
  background: var(--color-text);
  color: #fff;
}

/* --- Single Post --- */
.single-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.single-header .single-cat {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.single-header h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.single-header .single-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.single-header .single-meta .meta-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-text-muted);
}

/* AI Summary Box */
#ai-summary {
  background: var(--color-surface-alt);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  border-left: 3px solid var(--color-accent);
}

#ai-summary strong {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.5rem;
}

#ai-summary p:last-child { margin-bottom: 0; }

/* Blog Content Typography */
.blog-content {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
}

.blog-content h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.65rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.blog-content h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.3rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.blog-content p { margin-bottom: 1.5rem; }

.blog-content a {
  color: var(--color-accent);
  text-decoration: none;
}
.blog-content a:hover { text-decoration: underline; text-underline-offset: 2px; }

.blog-content blockquote {
  border-left: 4px solid var(--color-gold);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--color-gold-light);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
}

.blog-content pre {
  background: #1a1a2e;
  color: #e4e4e7;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.6;
  border-radius: 0;
}

.blog-content code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  background: var(--color-surface-alt);
  padding: 0.15em 0.35em;
  font-size: 0.85em;
}

.blog-content pre code { background: none; padding: 0; color: inherit; }

.blog-content img {
  max-width: 100%;
  height: auto;
  margin: 2rem auto;
  display: block;
}

.blog-content ul,
.blog-content ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.blog-content li { margin-bottom: 0.35rem; }
.blog-content hr { margin: 3rem 0; border: 0; height: 1px; background: var(--color-border); }

/* Glossary Box */
a.glossary-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}
a.glossary-link:hover {
  text-decoration-style: solid;
}

.glossary-box {
  background: var(--color-accent-light);
  padding: 1.5rem 2rem;
  margin-top: 2rem;
  border-left: 3px solid var(--color-accent);
}

.glossary-box h5 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.glossary-list dt {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: 0.15rem;
}

.glossary-list dd {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}
.glossary-list dd:last-child { margin-bottom: 0; }

/* FAQ */
.faq-wrap { margin-top: 2.5rem; }

.faq-wrap .faq-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.faq-wrap details {
  border: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: background 0.2s;
}

.faq-wrap details:hover { background: var(--color-surface-alt); }

.faq-wrap details summary {
  font-weight: 600;
  font-size: 0.9375rem;
  outline: none;
}

.faq-wrap details[open] summary { margin-bottom: 0.75rem; }

.faq-wrap details .faq-answer {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

/* Disclaimer */
.disclaimer-box {
  background: #fdf6ef;
  border-left: 3px solid var(--color-gold);
  padding: 1.25rem 1.5rem;
  margin-top: 2.5rem;
  font-size: 0.8125rem;
  color: #8b6d1a;
}

/* --- Footer --- */
.site-footer {
  background: #151515 !important;
  color: rgba(255, 255, 255, 0.6);
  padding: 3.5rem 0 2rem;
  margin-top: 4rem !important;
}

.site-footer h5 {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #fff;
  margin-bottom: 1.25rem;
}

.site-footer p { font-size: 0.875rem; line-height: 1.7; }

.site-footer a { color: rgba(255, 255, 255, 0.6); }
.site-footer a:hover { color: #fff; }

.site-footer .footer-disclaimer {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}

.site-footer hr {
  border-color: rgba(255, 255, 255, 0.08);
  margin: 2rem 0;
}

.site-footer .footer-bottom {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.35);
}

/* --- Back to Top --- */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  background: var(--color-text);
  color: #fff;
  border: none;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.35s ease;
  z-index: 1040;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

#back-to-top.visible { opacity: 1; transform: translateY(0); }
#back-to-top:hover { background: #333; }

/* --- Reading Progress --- */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* --- Tag Badge (for inline use) --- */
.tag-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.55rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  transition: all 0.2s;
}

.tag-badge:hover {
  background: var(--color-accent);
  color: #fff;
}

/* --- Section Tag Line --- */
.tag-line {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
}
.empty-state i { font-size: 2.5rem; color: var(--color-text-muted); margin-bottom: 1rem; }
.empty-state h2 { font-family: var(--font-serif); font-weight: 700; }

/* --- Responsive --- */
@media (max-width: 991.98px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}

@media (max-width: 767.98px) {
  .post-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .grid-item .entry-text { padding: 1rem 1.25rem 1.25rem; }
  .grid-item .entry-text h3 { font-size: 1rem; }
  .single-header h1 { font-size: 1.5rem; }
  #back-to-top { bottom: 1rem; right: 1rem; width: 36px; height: 36px; }
}