/*
Theme Name: GeneratePress Child - AutoEngineering
Template: generatepress
Version: 2.0.0
Description: Custom child theme for a technical automotive engineering blog.
*/

:root {
  --ae-blue: #0B2A4A;
  --ae-blue-soft: #2C5A82;
  --ae-accent: #FF5A1F;
  --ae-accent-dark: #E64A0F;
  --ae-bg: #FFFFFF;
  --ae-surface: #F7F9FB;
  --ae-text: #1F2937;
  --ae-text-muted: #6B7280;
  --ae-border: #E7EAEE;
  --ae-font-heading: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ae-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
  font-family: var(--ae-font-body);
  color: var(--ae-text);
  background: var(--ae-bg);
  line-height: 1.65;
}

h1, h2, h3, h4, h5, h6,
.site-title, .site-description,
.entry-title, .widget-title {
  font-family: var(--ae-font-heading);
  color: var(--ae-blue);
  font-weight: 600;
  letter-spacing: -0.01em;
}

a {
  color: var(--ae-blue);
}
a:hover {
  color: var(--ae-accent);
}

.site-header {
  background: var(--ae-bg);
  border-bottom: 1px solid var(--ae-border);
}
#site-navigation,
.main-navigation {
  background: var(--ae-bg);
  border-bottom: 1px solid var(--ae-border);
}
.main-navigation .main-nav ul li a {
  color: var(--ae-blue);
  font-family: var(--ae-font-heading);
  font-weight: 500;
  font-size: 0.95em;
  border-bottom: 2px solid transparent;
}
.main-navigation .main-nav ul li a:hover {
  color: var(--ae-blue);
  border-bottom: 2px solid var(--ae-accent);
}
.site-title a {
  color: var(--ae-blue) !important;
  font-weight: 700;
}
.site-description {
  color: var(--ae-text-muted);
  font-weight: 400;
}

#footer-widgets,
.site-footer {
  background: var(--ae-surface);
  color: var(--ae-text-muted);
  border-top: 1px solid var(--ae-border);
}
#footer-widgets .widget-title,
.site-footer h1, .site-footer h2, .site-footer h3, .site-footer h4 {
  color: var(--ae-blue);
  font-size: 1em;
}
#footer-widgets a,
.site-footer a {
  color: var(--ae-text-muted);
}
#footer-widgets a:hover,
.site-footer a:hover {
  color: var(--ae-accent);
}
#footer-widgets ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
#footer-widgets ul li {
  margin-bottom: 8px;
}
.copyright-bar {
  background: var(--ae-bg);
  border-top: 1px solid var(--ae-border);
  color: var(--ae-text-muted);
  font-size: 0.85em;
}

.ae-hero {
  background: var(--ae-bg);
  padding: 96px 20px 72px;
  text-align: left;
  max-width: 780px;
  margin: 0 auto;
}
.ae-hero .ae-eyebrow {
  display: inline-block;
  color: var(--ae-accent);
  font-family: var(--ae-font-heading);
  font-weight: 600;
  font-size: 0.8em;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.ae-hero h1 {
  color: var(--ae-blue);
  font-size: 2.75em;
  line-height: 1.15;
  margin: 0 0 0.4em 0;
}
.ae-hero p {
  color: var(--ae-text-muted);
  font-size: 1.15em;
  max-width: 560px;
  margin: 0;
}

.ae-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 20px;
}
.ae-section + .ae-section {
  border-top: 1px solid var(--ae-border);
}
.ae-section-title {
  font-size: 1.5em;
  margin-bottom: 6px;
}
.ae-section-subtitle {
  color: var(--ae-text-muted);
  margin-bottom: 40px;
  font-size: 0.98em;
}

.ae-category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--ae-border);
  border: 1px solid var(--ae-border);
}
.ae-category-card {
  background: var(--ae-bg);
  padding: 32px 26px;
  transition: background 0.15s ease;
  text-decoration: none;
  display: block;
  border-left: 3px solid transparent;
}
.ae-category-card:hover {
  background: var(--ae-surface);
  border-left: 3px solid var(--ae-accent);
}
.ae-category-card h3 {
  margin: 0 0 8px 0;
  font-size: 1.08em;
}
.ae-category-card p {
  color: var(--ae-text-muted);
  font-size: 0.92em;
  margin: 0;
  line-height: 1.5;
}

.ae-article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 32px;
}
.ae-article-card {
  background: transparent;
}
.ae-article-card-body {
  padding: 0;
}
.ae-article-card .ae-cat-label {
  display: inline-block;
  color: var(--ae-accent);
  font-size: 0.72em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.ae-article-card h3 {
  font-size: 1.08em;
  margin: 0 0 8px 0;
  line-height: 1.35;
}
.ae-article-card h3 a {
  color: var(--ae-blue);
}
.ae-article-card .ae-excerpt {
  color: var(--ae-text-muted);
  font-size: 0.92em;
  margin: 0;
  line-height: 1.55;
}

.single-post .entry-content {
  font-family: var(--ae-font-body);
  font-size: 1.08em;
  line-height: 1.75;
  max-width: 740px;
  margin: 0 auto;
}
.single-post .entry-content h2 {
  font-size: 1.45em;
  margin-top: 1.9em;
  margin-bottom: 0.6em;
}
.single-post .entry-content h3 {
  font-size: 1.15em;
  margin-top: 1.4em;
  margin-bottom: 0.5em;
  color: var(--ae-blue-soft);
}
.single-post .entry-content p {
  margin-bottom: 1.3em;
}
.single-post .entry-content a {
  border-bottom: 1px solid var(--ae-accent);
  text-decoration: none;
}
.single-post .entry-header {
  max-width: 740px;
  margin: 0 auto;
  padding-top: 32px;
}
.single-post .entry-title {
  font-size: 2em;
  line-height: 1.25;
}
.single-post .entry-meta {
  color: var(--ae-text-muted);
  font-size: 0.9em;
}
.single-post .ae-cat-label {
  display: inline-block;
  color: var(--ae-accent);
  font-size: 0.78em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.ae-archive-header {
  background: var(--ae-bg);
  border-bottom: 1px solid var(--ae-border);
  padding: 56px 20px 40px;
  text-align: left;
  max-width: 1100px;
  margin: 0 auto 8px;
}
.ae-archive-header h1 {
  font-size: 1.8em;
  margin-bottom: 8px;
}
.ae-archive-header p {
  color: var(--ae-text-muted);
  max-width: 600px;
  margin: 0;
}

@media (max-width: 900px) {
  .ae-category-grid,
  .ae-article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ae-hero {
    padding: 64px 20px 48px;
  }
  .ae-hero h1 {
    font-size: 2.1em;
  }
}

@media (max-width: 600px) {
  .ae-category-grid,
  .ae-article-grid {
    grid-template-columns: 1fr;
  }
  .ae-hero {
    padding: 48px 16px 36px;
  }
  .ae-hero h1 {
    font-size: 1.7em;
  }
  .ae-hero p {
    font-size: 1em;
  }
  .single-post .entry-title {
    font-size: 1.5em;
  }
  .ae-section {
    padding: 40px 16px;
  }
}

/* --- Article thumbnails --- */
.ae-thumb-link {
  display: block;
  text-decoration: none;
  border-bottom: none;
}
.ae-article-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--ae-surface);
  border: 1px solid var(--ae-border);
}
.ae-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.ae-thumb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--ae-blue) 0%, var(--ae-blue-soft) 100%);
}
.ae-thumb-placeholder span {
  color: rgba(255,255,255,0.92);
  font-family: var(--ae-font-heading);
  font-weight: 600;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: center;
  padding: 0 16px;
}

/* --- Single post featured image --- */
.ae-single-thumb {
  max-width: 740px;
  margin: 0 auto 32px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--ae-border);
}
.ae-single-thumb img {
  width: 100%;
  height: auto;
  display: block;
}

/* --- Single post layout with sidebar --- */
.ae-single-layout {
  display: grid;
  grid-template-columns: minmax(0, 740px) 300px;
  gap: 56px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: start;
}
.ae-single-main {
  min-width: 0;
}
.ae-single-main .entry-header,
.ae-single-main .entry-content {
  max-width: 740px;
  margin-left: 0;
  margin-right: 0;
}
.ae-single-main .ae-single-thumb {
  max-width: 740px;
  margin-left: 0;
  margin-right: 0;
}

.ae-sidebar {
  position: sticky;
  top: 24px;
}
.ae-widget {
  background: var(--ae-surface);
  border: 1px solid var(--ae-border);
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 24px;
}
.ae-widget-title {
  margin: 0 0 14px 0;
  font-size: 0.95em;
  color: var(--ae-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--ae-accent);
  padding-bottom: 8px;
}
.ae-widget-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.ae-widget-list li {
  margin-bottom: 12px;
  font-size: 0.92em;
  line-height: 1.4;
}
.ae-widget-list li:last-child {
  margin-bottom: 0;
}
.ae-widget-list a {
  color: var(--ae-text);
  border-bottom: none;
}
.ae-widget-list a:hover {
  color: var(--ae-accent);
}
.ae-cat-count {
  color: var(--ae-text-muted);
  font-size: 0.9em;
}
.ae-widget-search .search-form {
  display: flex;
  gap: 8px;
}
.ae-widget-search .search-field {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--ae-border);
  border-radius: 4px;
  font-family: var(--ae-font-body);
  font-size: 0.92em;
}
.ae-widget-search .search-submit {
  background: var(--ae-blue);
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 8px 14px;
  font-family: var(--ae-font-heading);
  font-size: 0.88em;
  cursor: pointer;
}
.ae-widget-search .search-submit:hover {
  background: var(--ae-accent);
}

@media (max-width: 900px) {
  .ae-single-layout {
    grid-template-columns: 1fr;
  }
  .ae-sidebar {
    position: static;
    margin-top: 40px;
    border-top: 1px solid var(--ae-border);
    padding-top: 32px;
  }
}