/* ============================================
   DomainForge Blog — CSS
   Editorial, mobile-first, content-authority
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,400&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400;1,6..72,500&display=swap');

:root {
  --color-primary: #6d28d9;
  --color-secondary: #4f46e5;
  --color-accent: #f59e0b;
  --color-bg: #fafbfc;
  --color-surface: #ffffff;
  --color-text: #1a2332;
  --color-text-mid: #3d4f63;
  --color-text-light: #6b7d92;
  --color-text-lighter: #94a3b8;
  --color-border: #e5e9ef;
  --color-border-light: #f1f4f8;
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --max-width: 1200px;
  --content-width: 780px;
  --sidebar-width: 340px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.03), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-sans); color: var(--color-text); background: var(--color-bg); line-height: 1.65; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s var(--ease); }
a:hover { color: var(--color-secondary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* Container */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }

/* ---- HEADER ---- */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.92);
}

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

.header__logo {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.02em;
}

.header__logo svg { width: 24px; height: 24px; }

.header__nav { display: none; }

.header__nav ul {
  display: flex;
  gap: 1.75rem;
}

.header__nav a {
  color: var(--color-text-mid);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.25rem 0;
  position: relative;
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.2s var(--ease);
}

.header__nav a:hover { color: var(--color-text); }
.header__nav a:hover::after,
.header__nav a.active::after { width: 100%; }

.header__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__hamburger span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: 0.2s var(--ease);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.5rem 1.25rem 1rem;
}

.mobile-nav.active { display: block; }

.mobile-nav li { border-bottom: 1px solid var(--color-border-light); }
.mobile-nav li:last-child { border-bottom: none; }

.mobile-nav a {
  display: block;
  padding: 0.7rem 0;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

/* ---- AD SLOTS ---- */
.ad-slot {
  background: var(--color-border-light);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  padding: 1rem;
  margin: 1.5rem 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-lighter);
  font-size: 0.8rem;
}

.ad-slot--header { min-height: 90px; }
.ad-slot--sidebar { min-height: 250px; }
.ad-slot--in-article { min-height: 250px; margin: 2rem 0; }
.ad-slot--footer { min-height: 90px; }

/* ---- HERO ---- */
.hero {
  background: linear-gradient(150deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: #fff;
  padding: 2.5rem 0;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero__title {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.hero__description {
  font-size: 0.95rem;
  opacity: 0.85;
  max-width: 560px;
  line-height: 1.6;
}

/* ---- BREADCRUMB ---- */
.breadcrumb {
  padding: 0.75rem 0;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb__separator { margin: 0 0.4rem; color: var(--color-text-lighter); }

/* ---- LAYOUT ---- */
.blog-layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  padding-bottom: 3rem;
}

.blog-main { flex: 1; min-width: 0; }
.blog-sidebar { width: 100%; }

/* ---- POST CARD ---- */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.post-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.post-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: transparent;
}

.post-card__thumbnail {
  display: block;
  width: 100%;
  height: 160px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 60%, var(--color-accent) 100%);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.post-card__thumbnail img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}

.post-card:hover .post-card__thumbnail img {
  transform: scale(1.05);
}

.post-card__thumbnail:empty::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(255,255,255,0.1) 0%, transparent 60%);
}

.post-card__body { padding: 1.25rem 1.25rem 1.5rem; }

.post-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.78rem;
  color: var(--color-text-lighter);
  margin-bottom: 0.6rem;
}

.post-card__category {
  background: var(--color-primary);
  color: #fff;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.4rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.post-card__title a { color: inherit; }
.post-card__title a:hover { color: var(--color-primary); }

.post-card__excerpt {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 0.2s var(--ease);
}

.post-card__read-more:hover { gap: 0.55rem; }

/* Featured */
.post-card--featured .post-card__thumbnail { height: 220px; }
.post-card--featured .post-card__title { font-size: 1.25rem; }

/* ---- SIDEBAR ---- */
.sidebar-widget {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  margin-bottom: 1.25rem;
}

.sidebar-widget__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-primary);
}

/* Categories list */
.categories-list li { border-bottom: 1px solid var(--color-border-light); }
.categories-list li:last-child { border-bottom: none; }

.categories-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0;
  color: var(--color-text-mid);
  font-size: 0.88rem;
  font-weight: 500;
}

.categories-list a:hover { color: var(--color-primary); }

.categories-list__count {
  background: var(--color-border-light);
  color: var(--color-text-lighter);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 10px;
}

/* Popular posts */
.popular-post {
  display: flex;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--color-border-light);
  align-items: flex-start;
}

.popular-post:last-child { border-bottom: none; }

.popular-post__number {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-border);
  line-height: 1;
  min-width: 1.75rem;
}

.popular-post__title {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-mid);
}

.popular-post__title:hover { color: var(--color-primary); }

/* Newsletter */
.newsletter-form { display: flex; flex-direction: column; gap: 0.6rem; }

.newsletter-form input {
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.2s var(--ease);
  background: var(--color-bg);
}

.newsletter-form input:focus { border-color: var(--color-primary); }

.newsletter-form button {
  padding: 0.65rem 1rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
  font-family: var(--font-sans);
}

.newsletter-form button:hover { background: var(--color-secondary); transform: translateY(-1px); }

/* ---- PAGINATION ---- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  margin-top: 2rem;
  padding: 1rem 0;
}

.pagination__link,
.pagination__current {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
}

.pagination__link {
  background: var(--color-surface);
  color: var(--color-text-mid);
  border: 1px solid var(--color-border);
  transition: all 0.2s var(--ease);
}

.pagination__link:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.pagination__current {
  background: var(--color-primary);
  color: #fff;
}

/* ---- POST (single) ---- */
.post-header { margin-bottom: 2rem; }

.post-header__category {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.post-header__title {
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.post-header__image {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.post-meta__item { display: flex; align-items: center; gap: 0.3rem; }
.post-meta__item svg { opacity: 0.6; }

/* Post content — editorial reading experience */
.post-content {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.post-content h2 {
  font-family: var(--font-sans);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2.5rem 0 0.85rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 2rem 0 0.65rem;
  color: var(--color-text);
}

.post-content p { margin-bottom: 1.25rem; }

.post-content ul,
.post-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.post-content ul { list-style: disc; }
.post-content ol { list-style: decimal; }
.post-content li { margin-bottom: 0.4rem; }

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

.post-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--color-border-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text-mid);
}

.post-content a {
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(0,0,0,0.15);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.2s;
}

.post-content a:hover { text-decoration-color: currentColor; }

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-family: var(--font-sans);
  font-size: 0.88rem;
}

.post-content th,
.post-content td {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.post-content th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.post-content tr:nth-child(even) { background: var(--color-border-light); }

/* Tags */
.post-tags { margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--color-border); }

.post-tags__title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 0.6rem;
}

.post-tags__list { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.post-tags__tag {
  background: var(--color-border-light);
  color: var(--color-text-mid);
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.post-tags__tag:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Related posts */
.related-posts {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.related-posts__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.related-posts__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

/* FAQ */
.faq-section {
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: var(--color-border-light);
  border-radius: var(--radius-lg);
}

.faq-section__title {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.faq-item { border-bottom: 1px solid var(--color-border); padding: 0.85rem 0; }
.faq-item:last-child { border-bottom: none; }

.faq-item__question {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.faq-item__answer {
  font-size: 0.92rem;
  color: var(--color-text-mid);
  line-height: 1.65;
}

/* ---- CATEGORY PAGE ---- */
.category-header {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.category-header__title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.category-header__count {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 0.2rem;
}

/* ---- FOOTER ---- */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.65);
  padding: 2.5rem 0;
  margin-top: 3rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.footer__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.6rem;
}

.footer__links li { margin-bottom: 0.35rem; }

.footer__links a { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.footer__links a:hover { color: #fff; }

.footer__disclaimer {
  font-size: 0.78rem;
  line-height: 1.55;
  opacity: 0.5;
}

.footer__bottom {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 0.78rem;
}

/* ---- RESPONSIVE ---- */
@media (min-width: 640px) {
  .posts-grid { grid-template-columns: repeat(2, 1fr); }
  .related-posts__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .hero { padding: 3.5rem 0; }
  .hero__title { font-size: 2rem; }
  .hero__description { font-size: 1.05rem; }
  .post-header__title { font-size: 2.15rem; }
  .header__nav { display: block; }
  .header__hamburger { display: none; }
  .container { padding: 0 2rem; }
}

@media (min-width: 1024px) {
  .blog-layout { flex-direction: row; }
  .blog-main { flex: 1; }
  .blog-sidebar { width: var(--sidebar-width); flex-shrink: 0; }
  .posts-grid { grid-template-columns: repeat(2, 1fr); }
  .post-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .post-card--featured .post-card__thumbnail { height: 100%; min-height: 280px; border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
  .post-card--featured .post-card__body { display: flex; flex-direction: column; justify-content: center; }
  .footer__grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1200px) {
  .hero__title { font-size: 2.25rem; }
}

/* ---- UTILITIES ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}