/* =================================================================
   ANDRO KÜLLERKUPP — blog.css
   Blog index and individual article page styles
   ================================================================= */

/* ---------- Blog hero ---------- */
.blog-hero {
  padding: 9rem 0 4rem;
  background: linear-gradient(180deg, white 0%, var(--c-bg-alt) 100%);
  position: relative;
  overflow: hidden;
}
.blog-hero::before {
  content: "";
  position: absolute;
  top: 60px;
  right: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(1,177,175,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.blog-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: 0.005em;
  margin-bottom: 1rem;
  max-width: 22ch;
}
.blog-hero-lead {
  font-size: 1.15rem;
  line-height: 1.55;
  color: var(--c-text-soft);
  max-width: 60ch;
  margin-bottom: 2.5rem;
}

/* ---------- Toolbar (filters + search) ---------- */
.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border);
}
.cat-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-soft);
  cursor: pointer;
  transition: all var(--transition);
}
.cat-chip:hover {
  border-color: var(--c-text);
  color: var(--c-text);
}
.cat-chip.is-active {
  background: var(--c-bg-dark);
  border-color: var(--c-bg-dark);
  color: white;
}
.cat-chip.is-active .cat-count { color: var(--c-accent); }
.cat-count {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--c-text-mute);
  margin-left: 0.15rem;
}

.blog-search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  min-width: 280px;
  transition: border-color var(--transition);
}
.blog-search:focus-within { border-color: var(--c-accent); }
.blog-search svg { color: var(--c-text-mute); flex-shrink: 0; }
.blog-search input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.92rem;
  color: var(--c-text);
}
.blog-search input::placeholder { color: var(--c-text-mute); }

/* ---------- Articles grid ---------- */
.blog-list {
  padding: 4rem 0 7rem;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.article-card {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--c-accent);
}
.article-card.is-hidden { display: none; }
.article-card-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  color: inherit;
  text-decoration: none;
}
.article-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--c-bg-alt);
  flex-shrink: 0;
}
.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  align-items: center;
  margin-bottom: 0.85rem;
  font-size: 0.75rem;
  color: var(--c-text-mute);
}
.article-meta time {
  letter-spacing: 0.02em;
}
.article-meta time::before {
  content: "·";
  margin-right: 0.6rem;
  color: var(--c-text-mute);
}
.article-cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: var(--c-accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
  text-decoration: none;
}
a.article-cat:hover { background: var(--c-accent); color: white; }
.article-body h2,
.article-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
  color: var(--c-text);
}
.article-body p {
  color: var(--c-text-soft);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}
.article-body .link-arrow {
  margin-top: auto;
  font-size: 0.88rem;
}

.articles-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--c-text-mute);
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.articles-empty svg { color: var(--c-text-mute); }

/* ---------- Blog CTA section ---------- */
.blog-cta {
  background: var(--c-bg-dark);
  color: var(--c-text-light);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}
.blog-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(1,177,175,0.18) 0%, transparent 60%);
  pointer-events: none;
}
.blog-cta-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}
.blog-cta-inner h2 { color: white; margin-bottom: 0.5rem; }
.blog-cta-inner p { color: rgba(255,255,255,0.75); max-width: 50ch; }
.blog-cta-inner .btn-primary { background: var(--c-accent); color: white; flex-shrink: 0; }
.blog-cta-inner .btn-primary:hover { background: white; color: var(--c-bg-dark); }

/* =================================================================
   ARTICLE PAGE
   ================================================================= */

.article-page { background: white; }

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 200;
  pointer-events: none;
}
.reading-progress div {
  height: 100%;
  width: 0;
  background: var(--c-accent);
  transition: width 100ms linear;
}

.article-header {
  padding: 8rem 0 0;
  background: var(--c-bg-alt);
  position: relative;
}

.article-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.82rem;
  color: var(--c-text-mute);
  align-items: center;
}
.article-breadcrumbs a {
  color: var(--c-text-soft);
  transition: color var(--transition);
}
.article-breadcrumbs a:hover { color: var(--c-accent); }
.article-breadcrumbs span[aria-hidden] { color: var(--c-text-mute); }
.article-breadcrumbs span[aria-current] {
  color: var(--c-text);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 40ch;
}

.article-header .article-meta { margin-bottom: 1.5rem; }
.article-reading-time {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.article-reading-time::before {
  content: "·";
  margin-right: 0.4rem;
  color: var(--c-text-mute);
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: 0.005em;
  color: var(--c-text);
  margin-bottom: 1.25rem;
  max-width: 24ch;
}
.article-excerpt {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--c-text-soft);
  max-width: 60ch;
  margin-bottom: 2.5rem;
}

.article-cover {
  margin: 0 auto;
  max-width: 1200px;
  padding: 0 1.5rem;
  margin-bottom: -120px;
}
.article-cover img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: block;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 4rem;
  padding-top: 8rem;
  padding-bottom: 4rem;
}
.article-sidebar {
  position: sticky;
  top: 110px;
  align-self: start;
}
.article-sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.article-sidebar-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-text-mute);
  margin: 0;
  padding-top: 0.75rem;
}
.article-sidebar-label:first-of-type { padding-top: 0; }
.article-share {
  display: flex;
  gap: 0.5rem;
}
.article-share a,
.article-share button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: 50%;
  color: var(--c-text-soft);
  cursor: pointer;
  transition: all var(--transition);
}
.article-share a:hover,
.article-share button:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-2px);
}
.article-share button.copied {
  background: var(--c-accent-soft);
  border-color: var(--c-accent);
  color: var(--c-accent);
}
.article-cta-btn { width: 100%; }

/* ---------- Article body content ---------- */
.article-content {
  max-width: 720px;
  font-size: 1.075rem;
  line-height: 1.75;
  color: var(--c-text);
}
.article-content > * + * { margin-top: 1.25rem; }
.article-content p {
  margin: 0 0 1.25rem;
  color: var(--c-text);
}
.article-content p:last-child { margin-bottom: 0; }
.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.85rem;
  line-height: 1.15;
  letter-spacing: 0.005em;
  margin: 3rem 0 1rem;
  font-weight: 400;
}
.article-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 1rem;
}
.article-content h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
}
.article-content a {
  color: var(--c-accent);
  text-decoration: underline;
  text-decoration-color: rgba(1,177,175,0.4);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}
.article-content a:hover { text-decoration-color: currentColor; }
.article-content strong { font-weight: 700; }
.article-content em { font-style: italic; }
.article-content u {
  text-decoration: underline;
  text-decoration-color: var(--c-accent);
  text-underline-offset: 3px;
}
.article-content blockquote {
  margin: 2rem 0;
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--c-accent);
  background: var(--c-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--c-text);
  font-style: italic;
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content ul,
.article-content ol {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}
.article-content ul { list-style: none; padding-left: 0; }
.article-content ul li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.6rem;
}
.article-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
}
.article-content ol {
  list-style: none;
  counter-reset: ol;
  padding-left: 0;
}
.article-content ol li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 0.6rem;
  counter-increment: ol;
}
.article-content ol li::before {
  content: counter(ol);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-display);
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 2rem 0;
  box-shadow: var(--shadow);
}
.article-content figure { margin: 2rem 0; }
.article-content figure img { margin: 0; }
.article-content figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--c-text-mute);
  text-align: center;
}
.article-content hr {
  border: none;
  height: 1px;
  background: var(--c-border);
  margin: 3rem 0;
}
.article-content iframe {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 2rem 0;
  border: none;
}
.article-content video {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 2rem 0;
}

/* ---------- Author card ---------- */
.article-author {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  align-items: center;
  margin: 2rem 0 4rem;
  padding: 2rem;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
}
.article-author-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--c-accent);
}
.article-author-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-author-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  margin-bottom: 0.5rem;
}
.article-author-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.article-author-info p {
  color: var(--c-text-soft);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}
.article-author-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---------- Pagination ---------- */
.article-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 6rem;
}
.article-nav-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.5rem 1.75rem;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  color: inherit;
  text-decoration: none;
}
.article-nav-item:hover {
  border-color: var(--c-accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.article-nav-next { text-align: right; }
.article-nav-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 0.02em;
}
.article-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.4;
}

/* ---------- Related ---------- */
.article-related {
  padding: 4rem 0 6rem;
  background: var(--c-bg-alt);
  border-top: 1px solid var(--c-border);
}
.related-grid { gap: 1.5rem; }
.related-grid .article-card { transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .articles-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-top: 6rem;
  }
  .article-sidebar {
    position: static;
    order: 2;
    margin-top: 2rem;
  }
  .article-sidebar-inner {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem 2rem;
  }
  .article-sidebar-label { padding-top: 0; }
  .article-cta-btn { width: auto; }
}

@media (max-width: 768px) {
  .blog-hero { padding: 7rem 0 3rem; }
  .blog-hero-title { font-size: 2rem; }
  .blog-hero-lead { font-size: 1rem; }
  .blog-toolbar { flex-direction: column; align-items: stretch; }
  .blog-search { width: 100%; }
  .blog-list { padding: 3rem 0 4rem; }
  .articles-grid { grid-template-columns: 1fr; gap: 1rem; }

  .article-header { padding: 7rem 0 0; }
  .article-cover { padding: 0; margin-bottom: -80px; }
  .article-cover img { border-radius: 0; }
  .article-layout {
    padding-top: 5rem;
    padding-bottom: 3rem;
  }
  .article-content { font-size: 1rem; }
  .article-content h2 { font-size: 1.5rem; }
  .article-content h3 { font-size: 1.2rem; }

  .article-author {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 1.5rem;
  }
  .article-author-photo { margin: 0 auto; }
  .article-author-cta { justify-content: center; }

  .article-pagination { grid-template-columns: 1fr; gap: 0.5rem; }
  .article-nav-next { text-align: left; }

  .blog-cta-inner { flex-direction: column; align-items: stretch; text-align: center; }
}