/* ============================================================
   BKB Techies — Blog Stylesheet
   Inherits from main.css. Add only blog-specific styles here.
   ============================================================ */

/* ── Screen Reader Only ────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ── Blog Hero ─────────────────────────────────────────────── */
.blog-hero {
  padding: 7rem 0 3.5rem;
  text-align: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.blog-hero-sub {
  max-width: 600px;
  margin: 1rem auto 2rem;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.blog-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.bs-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bs-num {
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bs-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

.bs-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--border);
}

/* ── Cluster Filters ───────────────────────────────────────── */
.blog-filters {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 64px;
  z-index: 10;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ── Blog Grid ─────────────────────────────────────────────── */
.blog-grid-section {
  padding: 4rem 0 5rem;
  background: var(--bg);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.blog-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.bc-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.bc-cluster {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.bc-date {
  font-size: 0.75rem;
  color: var(--muted);
  margin-left: auto;
}

.bc-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
}

.bc-title a {
  color: var(--fg);
  text-decoration: none;
  transition: color 0.2s;
}

.bc-title a:hover {
  color: var(--accent);
}

.bc-excerpt {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.65;
  flex: 1;
}

.bc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.bc-read {
  font-size: 0.75rem;
  color: var(--muted);
}

.bc-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

.bc-link:hover { opacity: 0.75; }

/* Empty state */
.blog-empty {
  text-align: center;
  padding: 5rem 1rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* ── Newsletter Section ─────────────────────────────────────── */
.blog-newsletter {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 4rem 0;
}

.newsletter-box {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
}

.newsletter-box p {
  color: var(--muted);
  margin: 0.75rem 0 1.5rem;
  line-height: 1.65;
}

.newsletter-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.newsletter-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 0.75rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.newsletter-form input[type="email"]:focus {
  border-color: var(--accent);
}

.nl-note {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.75rem !important;
}

.nl-success {
  color: #4ade80;
  font-weight: 600;
  padding: 0.75rem;
}

/* ── Blog Post Page ─────────────────────────────────────────── */
.blog-post-page {
  padding: 5rem 0 4rem;
  background: var(--bg);
  min-height: 70vh;
}

.blog-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Breadcrumb */
.blog-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.blog-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.blog-breadcrumb a:hover { color: var(--accent); }

/* Post Meta Header */
.blog-header { margin-bottom: 2rem; }

.blog-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.blog-cluster {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(99, 102, 241, 0.12);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}

.blog-date, .blog-read-time {
  font-size: 0.8rem;
  color: var(--muted);
}

/* Post Content Typography */
.blog-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--fg);
}

.blog-content h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--fg);
}

.blog-content h2 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--fg);
}

.blog-content h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.75rem 0 0.75rem;
  color: var(--fg);
}

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

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

.blog-content li { margin-bottom: 0.5rem; }

.blog-content strong { color: var(--fg); font-weight: 600; }

.blog-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.blog-content pre {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

.blog-content code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875em;
  background: rgba(99, 102, 241, 0.1);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #a78bfa;
}

.blog-content pre code {
  background: none;
  padding: 0;
  color: #e5e7eb;
}

.blog-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.blog-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.blog-content th, .blog-content td {
  padding: 0.6rem 1rem;
  text-align: left;
  border: 1px solid var(--border);
}

.blog-content th {
  background: var(--surface);
  font-weight: 600;
}

.blog-content pre {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  max-width: 100%;
  overflow-x: auto;
  white-space: pre;
  word-wrap: normal;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

.blog-content code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875em;
  background: rgba(99, 102, 241, 0.1);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #a78bfa;
  word-wrap: break-word;
  word-break: break-all;
  white-space: pre-wrap;
}

.blog-content pre code {
  background: none;
  padding: 0;
  color: #e5e7eb;
  word-wrap: normal;
  word-break: normal;
  white-space: pre;
}

.blog-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.blog-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.blog-content th, .blog-content td {
  padding: 0.6rem 1rem;
  text-align: left;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.blog-content th {
  background: var(--surface);
  font-weight: 600;
}

.blog-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 2rem auto;
  border-radius: 12px;
}

.blog-content p,
.blog-content li,
.blog-content a {
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
}

/* Author Card */
.blog-author-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin: 3rem 0 2rem;
}

.bac-logo img { border-radius: 10px; }

.bac-info strong {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.bac-info p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.bac-cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

.bac-cta:hover { opacity: 0.75; }

/* Post Nav */
.blog-post-nav {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form input[type="email"],
  .newsletter-form button { width: 100%; }
  .blog-author-card { flex-direction: column; }
  .blog-post-nav { flex-direction: column; }
  .blog-post-nav .btn-ghost,
  .blog-post-nav .btn-primary { text-align: center; }
  .filter-row { gap: 0.4rem; }
  .filter-btn { font-size: 0.72rem; padding: 0.35rem 0.8rem; }
}