/* ═══════════════════════════════════════════════════════════════════
   ZamaniAuto — Blog v3.0 CSS — "Engineering That Educates"
   Design System: Professional engineering journal, not a personal blog.
   ═══════════════════════════════════════════════════════════════════ */

/* ═══════ DESIGN TOKENS ═══════ */
:root, [data-theme="light"] {
  --bl-bg:               #F8FAFC;
  --bl-surface:          #FFFFFF;
  --bl-surface-alt:      #F1F5F9;
  --bl-text:             #0F172A;
  --bl-text-soft:        #475569;
  --bl-text-muted:       #94A3B8;
  --bl-border:           rgba(0,0,0,0.06);
  --bl-border-strong:    rgba(0,0,0,0.10);
  --bl-accent:           #0D7377;
  --bl-accent-light:     #14A3A8;
  --bl-accent-soft:      rgba(13,115,119,0.06);
  --bl-accent-glow:      rgba(13,115,119,0.15);
  --bl-hero-bg:          #0A1628;
  --bl-hero-gradient:    linear-gradient(160deg, #061220 0%, #0A1628 30%, #0D3840 70%, #0D7377 100%);
  --bl-card-bg:          #FFFFFF;
  --bl-card-border:      rgba(0,0,0,0.06);
  --bl-card-hover-border: rgba(13,115,119,0.25);
  --bl-card-shadow:      0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --bl-card-shadow-hover:0 10px 30px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);
  --bl-card-radius:      14px;
  --bl-transition:       300ms cubic-bezier(0.4, 0, 0.2, 1);
  --bl-gold:             #D97706;
  --bl-code-bg:          #F1F5F9;
  --bl-code-text:        #0F172A;
  --bl-toc-bg:           rgba(13,115,119,0.04);
  --bl-toc-border:       rgba(13,115,119,0.15);
  --bl-tip-bg:           rgba(16,185,129,0.06);
  --bl-tip-border:       rgba(16,185,129,0.25);
  --bl-warning-bg:       rgba(239,68,68,0.06);
  --bl-warning-border:   rgba(239,68,68,0.25);
  --bl-highlight-bg:     rgba(245,158,11,0.08);
  --bl-highlight-border: rgba(245,158,11,0.25);
}

[data-theme="dark"] {
  --bl-bg:               #0F172A;
  --bl-surface:          #1E293B;
  --bl-surface-alt:      #162032;
  --bl-text:             #F1F5F9;
  --bl-text-soft:        #94A3B8;
  --bl-text-muted:       #64748B;
  --bl-border:           rgba(255,255,255,0.06);
  --bl-border-strong:    rgba(255,255,255,0.10);
  --bl-accent:           #5EEAD4;
  --bl-accent-light:     #14A3A8;
  --bl-accent-soft:      rgba(94,234,212,0.06);
  --bl-accent-glow:      rgba(94,234,212,0.12);
  --bl-hero-bg:          #060F1E;
  --bl-hero-gradient:    linear-gradient(160deg, #040B18 0%, #060F1E 30%, #0A2030 70%, #0D7377 100%);
  --bl-card-bg:          #1E293B;
  --bl-card-border:      rgba(255,255,255,0.06);
  --bl-card-hover-border: rgba(94,234,212,0.3);
  --bl-card-shadow:      0 1px 3px rgba(0,0,0,0.3);
  --bl-card-shadow-hover:0 12px 36px rgba(0,0,0,0.5);
  --bl-code-bg:          #0F172A;
  --bl-code-text:        #E2E8F0;
  --bl-toc-bg:           rgba(94,234,212,0.04);
  --bl-toc-border:       rgba(94,234,212,0.12);
  --bl-tip-bg:           rgba(16,185,129,0.08);
  --bl-tip-border:       rgba(16,185,129,0.2);
  --bl-warning-bg:       rgba(239,68,68,0.08);
  --bl-warning-border:   rgba(239,68,68,0.2);
  --bl-highlight-bg:     rgba(245,158,11,0.08);
  --bl-highlight-border: rgba(245,158,11,0.2);
}

/* ═══════ BASE ═══════ */
.bl-container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ═══════ SCROLL PROGRESS ═══════ */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px;
  background: var(--bl-accent); z-index: 9999; width: 0%;
  transition: width 100ms linear; pointer-events: none;
}

/* ═══════ BLOG HERO — Compact & Professional ═══════ */
.blog-header {
  padding: 72px 24px 56px; text-align: center;
  background: var(--bl-hero-gradient);
  position: relative; overflow: hidden; isolation: isolate;
}
.blog-header::before {
  content: ''; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(13,115,119,0.22) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 100%, rgba(94,234,212,0.08) 0%, transparent 60%);
}
.blog-header > * { position: relative; z-index: 1; }

.blog-header .section-tag {
  display: inline-block;
  background: rgba(255,255,255,0.12); color: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  padding: 5px 18px; border-radius: 50px; font-size: 0.8rem;
  font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px;
  margin-bottom: 16px; border: 1px solid rgba(255,255,255,0.10);
}

.blog-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800;
  color: #fff; margin: 0 0 14px; letter-spacing: -0.3px; line-height: 1.3;
}

.blog-header > p {
  font-size: 1.05rem; color: rgba(255,255,255,0.65);
  max-width: 620px; margin: 0 auto 32px; line-height: 1.8;
  font-weight: 400;
}

/* ── Hero Stats Row ── */
.blog-hero-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; flex-wrap: wrap; margin-bottom: 28px;
}
.bl-stat-capsule {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  font-size: 0.85rem; color: rgba(255,255,255,0.75);
  font-weight: 500;
}
.bl-stat-capsule strong {
  color: #5EEAD4; font-weight: 700; font-size: 1.05rem;
}

/* ── Glass Search Capsule ── */
.hero-glass-search {
  display: flex; justify-content: center;
}
.glass-search-inner {
  position: relative; width: 100%; max-width: 500px;
}
.glass-search-icon {
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  font-size: 1.05rem; opacity: 0.6; pointer-events: none; z-index: 2;
}
.glass-search-input {
  width: 100%; padding: 14px 20px 14px 48px;
  border-radius: 12px; border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.08); color: #fff;
  font-size: 0.95rem; font-family: inherit;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  outline: none; transition: var(--bl-transition);
}
.glass-search-input::placeholder { color: rgba(255,255,255,0.4); }
.glass-search-input:focus {
  border-color: rgba(94,234,212,0.5);
  box-shadow: 0 0 0 3px rgba(94,234,212,0.1);
  background: rgba(255,255,255,0.12);
}
.glass-search-clear {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: rgba(255,255,255,0.5); text-decoration: none;
  font-size: 0.9rem; padding: 4px 8px; border-radius: 50%;
  transition: var(--bl-transition); z-index: 2;
}
.glass-search-clear:hover { color: #fff; background: rgba(255,255,255,0.1); }

/* ═══════ TOOLBAR — Category Tabs ═══════ */
.blog-toolbar {
  background: var(--bl-surface);
  border-bottom: 1px solid var(--bl-border);
  position: sticky; top: 0; z-index: 100;
  padding: 0; transition: box-shadow 0.3s;
}
.blog-toolbar.is-stuck { box-shadow: 0 2px 12px rgba(0,0,0,0.06); }

.blog-toolbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; padding: 12px 0;
}

/* ── Category Tab Pills ── */
.categories {
  display: flex; gap: 8px; overflow-x: auto; flex: 1;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
  padding-bottom: 2px;
}
.categories::-webkit-scrollbar { display: none; }

.cat-btn {
  flex-shrink: 0; padding: 9px 20px; border-radius: 8px;
  font-size: 0.85rem; font-weight: 600; cursor: pointer;
  background: transparent; color: var(--bl-text-soft);
  border: 1px solid transparent; transition: var(--bl-transition);
  white-space: nowrap; font-family: inherit;
}
.cat-btn:hover {
  color: var(--bl-accent); background: var(--bl-accent-soft);
  border-color: var(--bl-accent-glow);
}
.cat-btn.active {
  background: var(--bl-accent); color: #fff; border-color: var(--bl-accent);
  font-weight: 700; box-shadow: 0 4px 12px var(--bl-accent-glow);
}

/* ── Results Info + Sort ── */
.blog-meta-row {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
  font-size: 0.82rem; color: var(--bl-text-soft);
}
.blog-meta-row strong { color: var(--bl-accent); font-weight: 700; }
.bl-sort-select {
  padding: 7px 12px; border-radius: 6px; border: 1px solid var(--bl-border-strong);
  font-size: 0.82rem; background: var(--bl-surface); color: var(--bl-text);
  font-family: inherit; cursor: pointer; outline: none;
}
.bl-sort-select:focus { border-color: var(--bl-accent); }

/* ═══════ ARTICLES GRID ═══════ */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px 64px; }

/* ── Blog Layout — Grid + Sidebar ── */
.blog-layout { display: grid; grid-template-columns: 1fr 300px; gap: 28px; padding-top: 28px; }
.blog-main-col { min-width: 0; }
.blog-sidebar { position: sticky; top: 80px; align-self: start; }

.articles-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
/* Featured card spans 2 columns */
.article-card.featured-card { grid-column: span 2; flex-direction: row; }
.article-card.featured-card .article-card-image { width: 50%; flex-shrink: 0; aspect-ratio: auto; min-height: 260px; }
.article-card.featured-card .article-card-body { flex: 1; padding: 24px; }

/* ── Article Card ── */
.article-card {
  background: var(--bl-card-bg); border-radius: var(--bl-card-radius);
  overflow: hidden; border: 1px solid var(--bl-card-border);
  box-shadow: var(--bl-card-shadow); transition: var(--bl-transition);
  display: flex; flex-direction: column; cursor: pointer;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--bl-card-shadow-hover);
  border-color: var(--bl-card-hover-border);
}

/* Card image */
.article-card-image {
  width: 100%; aspect-ratio: 16/10;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; overflow: hidden; position: relative;
  background: var(--bl-surface, #f1f5f9);
}
.article-card-image img {
  width: 100%; height: 100%; object-fit: contain; display: block;
  background: var(--bl-surface, #f1f5f9);
}
/* Card image badge */
.article-card-badge {
  position: absolute; top: 10px; right: 10px;
  background: rgba(13,115,119,0.9); color: #fff;
  padding: 4px 10px; border-radius: 4px;
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Category gradients for placeholder cards */
.aci-1 { background: linear-gradient(135deg, #0A1628, #1E3A5F); }
.aci-2 { background: linear-gradient(135deg, #0D7377, #14A3A8); }
.aci-3 { background: linear-gradient(135deg, #B8860B, #E6C200); }
.aci-4 { background: linear-gradient(135deg, #0D4F8B, #1E90FF); }
.aci-5 { background: linear-gradient(135deg, #4B0082, #6A0DAD); }
.aci-6 { background: linear-gradient(135deg, #1E293B, #475569); }

/* Card body */
.article-card-body {
  padding: 18px; flex: 1; display: flex; flex-direction: column;
}

/* Meta row: category + date */
.article-meta {
  display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap;
}
.article-cat {
  display: inline-block; padding: 3px 10px; border-radius: 4px;
  background: var(--bl-accent-soft); color: var(--bl-accent);
  font-size: 0.72rem; font-weight: 700;
}
.article-date { color: var(--bl-text-muted); font-size: 0.78rem; font-weight: 500; }

/* Stats row: reading time + views */
.article-stats {
  display: flex; gap: 14px; font-size: 0.78rem; color: var(--bl-text-muted);
  margin-bottom: 8px;
}
.article-stat-item { display: flex; align-items: center; gap: 4px; }

/* Title */
.article-card-body h3 {
  font-size: 1.05rem; font-weight: 700; color: var(--bl-text);
  margin: 0 0 8px; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-body h3 a { color: inherit; text-decoration: none; }
.article-card-body h3 a:hover { color: var(--bl-accent); }

/* Excerpt */
.article-card-body > p {
  font-size: 0.84rem; color: var(--bl-text-soft); line-height: 1.7;
  margin: 0 0 10px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Authors line */
.article-authors {
  color: var(--bl-text-soft); font-size: 0.8rem; margin-top: 8px;
  padding-top: 10px; border-top: 1px solid var(--bl-border);
}

/* Read more link */
.article-read-more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: auto; padding-top: 12px;
  color: var(--bl-accent); font-weight: 700; font-size: 0.85rem;
  text-decoration: none; transition: var(--bl-transition);
}
.article-read-more:hover { gap: 10px; opacity: 0.8; }

/* ── Coming Soon Card ── */
.coming-soon {
  background: var(--bl-surface); border: 2px dashed var(--bl-border-strong);
  align-items: center; justify-content: center; text-align: center; padding: 40px 24px;
}
.coming-soon h3 { color: var(--bl-text); margin-bottom: 8px; }
.coming-soon p { color: var(--bl-text-soft); font-size: 0.9rem; }

/* ── No Results ── */
.blog-no-results {
  grid-column: 1 / -1; display: flex; flex-direction: column;
  align-items: center; text-align: center; padding: 64px 24px;
}
.blog-no-results h3 { color: var(--bl-text); font-size: 1.15rem; margin: 12px 0 8px; }
.blog-no-results p { color: var(--bl-text-soft); margin-bottom: 16px; }
.blog-no-results .btn-primary {
  display: inline-block; padding: 12px 28px; border-radius: 8px;
  background: var(--bl-accent); color: #fff; font-weight: 700;
  text-decoration: none; transition: var(--bl-transition); font-family: inherit;
}
.blog-no-results .btn-primary:hover { background: var(--bl-accent-light); }

/* ═══════ SIDEBAR ═══════ */
.blog-sidebar { display: flex; flex-direction: column; gap: 20px; }

.bl-sidebar-card {
  background: var(--bl-surface); border-radius: var(--bl-card-radius);
  border: 1px solid var(--bl-border); padding: 20px;
  box-shadow: var(--bl-card-shadow);
}

/* ── Newsletter ── */
.bl-newsletter h3 {
  font-size: 1rem; font-weight: 700; color: var(--bl-text);
  margin: 0 0 6px;
}
.bl-newsletter p {
  font-size: 0.82rem; color: var(--bl-text-soft); line-height: 1.7; margin: 0 0 14px;
}
.bl-newsletter-form { display: flex; gap: 8px; }
.bl-newsletter-input {
  flex: 1; padding: 10px 14px; border-radius: 8px;
  border: 1px solid var(--bl-border-strong); background: var(--bl-bg);
  color: var(--bl-text); font-size: 0.85rem; font-family: inherit; outline: none;
}
.bl-newsletter-input:focus { border-color: var(--bl-accent); }
.bl-newsletter-btn {
  padding: 10px 16px; border-radius: 8px; background: var(--bl-accent);
  color: #fff; font-weight: 700; font-size: 0.85rem; border: none;
  cursor: pointer; font-family: inherit; transition: var(--bl-transition);
  white-space: nowrap;
}
.bl-newsletter-btn:hover { background: var(--bl-accent-light); }
.bl-newsletter-note {
  font-size: 0.72rem; color: var(--bl-text-muted); margin-top: 8px;
}

/* ── Categories List ── */
.bl-sidebar-card h4 {
  font-size: 0.9rem; font-weight: 700; color: var(--bl-text);
  margin: 0 0 14px; padding-bottom: 10px; border-bottom: 1px solid var(--bl-border);
}
.bl-cat-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.bl-cat-item { display: flex; }
.bl-cat-link {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 8px 12px; border-radius: 8px;
  text-decoration: none; font-size: 0.85rem; font-weight: 500;
  color: var(--bl-text-soft); transition: var(--bl-transition);
}
.bl-cat-link:hover { background: var(--bl-accent-soft); color: var(--bl-accent); }
.bl-cat-link .bl-cat-icon { margin-left: 8px; font-size: 0.9rem; }
.bl-cat-count {
  background: var(--bl-accent-soft); color: var(--bl-accent);
  padding: 2px 8px; border-radius: 10px; font-size: 0.72rem; font-weight: 700;
}

/* ── Popular Posts ── */
.bl-popular-list { display: flex; flex-direction: column; gap: 10px; }
.bl-popular-item {
  display: flex; gap: 10px; align-items: flex-start;
  text-decoration: none; padding: 8px; border-radius: 8px;
  transition: var(--bl-transition);
}
.bl-popular-item:hover { background: var(--bl-accent-soft); }
.bl-popular-num {
  font-size: 1rem; font-weight: 800; color: var(--bl-accent);
  min-width: 24px; text-align: center; flex-shrink: 0;
}
.bl-popular-title {
  font-size: 0.82rem; font-weight: 600; color: var(--bl-text);
  line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.bl-popular-views {
  font-size: 0.72rem; color: var(--bl-text-muted); margin-top: 2px;
}

/* ── Tag Cloud ── */
.bl-tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.bl-tag {
  display: inline-block; padding: 4px 10px; border-radius: 6px;
  background: var(--bl-accent-soft); color: var(--bl-text-soft);
  font-size: 0.75rem; font-weight: 500; text-decoration: none;
  transition: var(--bl-transition);
}
.bl-tag:hover { background: var(--bl-accent); color: #fff; }

/* ── CTA Card ── */
.bl-cta-card {
  background: linear-gradient(135deg, var(--bl-accent), #095A5F);
  border: none; color: #fff; text-align: center;
}
.bl-cta-card h4 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
.bl-cta-card p { font-size: 0.82rem; opacity: 0.9; line-height: 1.7; margin: 0 0 14px; }
.bl-cta-card .bl-cta-phone {
  display: block; color: #fff; font-size: 1.05rem; font-weight: 800;
  text-decoration: none; margin-bottom: 6px;
}
.bl-cta-card .bl-cta-sub { font-size: 0.75rem; opacity: 0.75; }

/* ═══════ PAGINATION ═══════ */
.blog-pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 6px; margin-top: 32px; grid-column: 1 / -1;
  direction: ltr;
}
.pagination-btn, .pagination-num {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 12px;
  border-radius: 8px; font-size: 0.9rem; font-weight: 600;
  text-decoration: none; transition: var(--bl-transition);
  border: 1px solid var(--bl-border-strong);
  background: var(--bl-surface); color: var(--bl-text-soft);
  font-family: inherit;
}
.pagination-btn:hover, .pagination-num:hover {
  background: var(--bl-accent-soft); border-color: var(--bl-accent);
  color: var(--bl-accent);
}
.pagination-num.active {
  background: var(--bl-accent); color: #fff; border-color: var(--bl-accent);
}
.pagination-btn.disabled { opacity: 0.3; pointer-events: none; }
.pagination-dots { padding: 0 4px; color: var(--bl-text-muted); font-weight: 600; }

/* ═══════ RESPONSIVE ═══════ */
@media (max-width: 1023px) {
  .blog-header { padding: 56px 20px 40px; }
  .blog-header h1 { font-size: 1.6rem; }
  .blog-header > p { font-size: 0.95rem; }
  .blog-layout { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-sidebar { position: static; }
  .article-card.featured-card { flex-direction: column; }
  .article-card.featured-card .article-card-image { width: 100%; min-height: 200px; aspect-ratio: 16/9; }
}

@media (max-width: 767px) {
  .blog-header { padding: 48px 16px 32px; }
  .blog-header h1 { font-size: 1.35rem; }
  .blog-header > p { font-size: 0.88rem; max-width: 100%; }
  .blog-hero-stats { gap: 8px; }
  .bl-stat-capsule { padding: 6px 14px; font-size: 0.78rem; }
  .blog-toolbar-inner { flex-direction: column; align-items: stretch; }
  .blog-meta-row { justify-content: space-between; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-card.featured-card { grid-column: span 1; }
  .article-card.featured-card .article-card-image { min-height: 180px; }
  .blog-pagination { flex-wrap: wrap; }
}