/* ============================================================
   Klimastyle – Blog (listing + article pages)
   Inherits design tokens from styles.css
   ============================================================ */

/* ---------- Reading progress bar ---------- */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--teal);
  z-index: 2000;
  transition: width .08s linear;
  border-radius: 0 2px 2px 0;
}

/* ---------- Blog / article hero ---------- */
.blog-hero {
  position: relative;
  min-height: clamp(260px, 30vw, 360px);
  display: flex;
  align-items: center;
  padding-top: 70px;
  overflow: hidden;
}
.blog-hero-bg { position: absolute; inset: 0; z-index: 0; }
.blog-hero-img { width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.blog-hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(26,35,50,.95) 0%, rgba(26,35,50,.8) 55%, rgba(26,35,50,.48) 100%);
}
.blog-hero-content {
  position: relative; z-index: 1;
  padding-block: clamp(2.5rem, 5vw, 3.75rem);
}
.blog-hero-content h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800; color: var(--white);
  line-height: 1.1; letter-spacing: -.02em;
  margin-block: 0 .75rem;
}
.blog-hero-content > p {
  font-size: clamp(.9rem, 1.4vw, 1.05rem);
  color: rgba(255,255,255,.75);
  max-width: 600px; line-height: 1.65;
  margin: 0;
}

/* ---------- Breadcrumb ---------- */
.blog-breadcrumb {
  display: flex; align-items: center; gap: .5rem;
  font-size: .82rem; color: rgba(255,255,255,.55);
  margin-bottom: 1.25rem;
}
.blog-breadcrumb a { color: rgba(255,255,255,.65); transition: color .2s; }
.blog-breadcrumb a:hover { color: var(--teal); }
.blog-breadcrumb span:last-child { color: rgba(255,255,255,.9); }

/* ---------- Blog listing ---------- */
.blog-listing-section { background: var(--gray-50); }
.blog-listing-header { margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}
@media (max-width: 860px) {
  .blog-grid { grid-template-columns: 1fr; }
}

.blog-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.blog-card-img {
  height: 240px;
  overflow: hidden;
  flex-shrink: 0;
}
.blog-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.blog-card:hover .blog-card-img img { transform: scale(1.05); }

.blog-card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.blog-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  margin-bottom: 1rem;
}
.blog-card-tag {
  display: inline-block;
  background: var(--teal-light);
  color: var(--teal-dark);
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  padding: .25rem .7rem;
  border-radius: 100px;
}
.blog-card-readtime {
  font-size: .78rem;
  color: var(--gray-500);
  white-space: nowrap;
}

.blog-card h2 {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: .75rem;
}
.blog-card-excerpt {
  font-size: .9rem;
  color: var(--gray-500);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1.5rem;
}
.blog-card-cta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--teal-dark);
  align-self: flex-start;
  transition: color var(--transition), gap var(--transition);
}
.blog-card-cta svg {
  width: 16px; height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.blog-card:hover .blog-card-cta { color: var(--teal); gap: .65rem; }
.blog-card:hover .blog-card-cta svg { transform: translateX(3px); }

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

/* Taller hero with bottom-anchored text */
.article-hero {
  position: relative;
  min-height: clamp(340px, 42vw, 520px);
  display: flex;
  align-items: flex-end;
  padding-top: 70px;
  overflow: hidden;
}
.article-hero-bg { position: absolute; inset: 0; z-index: 0; }
.article-hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 35%;
}
.article-hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(0deg,
    rgba(26,35,50,.97) 0%,
    rgba(26,35,50,.75) 45%,
    rgba(26,35,50,.28) 100%
  );
}
.article-hero-content {
  position: relative; z-index: 1;
  padding-block: clamp(2.5rem, 5vw, 4rem);
  max-width: 820px;
}
.article-hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  margin-bottom: 1.25rem;
}
.article-hero-tag {
  display: inline-block;
  background: rgba(0,180,204,.18);
  border: 1px solid rgba(0,180,204,.4);
  color: #7FDFEC;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  padding: .28rem .8rem;
  border-radius: 100px;
}
.article-hero-date,
.article-hero-readtime {
  font-size: .8rem;
  color: rgba(255,255,255,.5);
}
.article-hero-readtime::before {
  content: '·';
  margin-right: .5rem;
  color: rgba(255,255,255,.25);
}
.article-hero h1 {
  font-size: clamp(1.65rem, 3.8vw, 2.75rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  letter-spacing: -.02em;
}

/* Article body layout */
.article-layout {
  background: var(--white);
  padding-block: clamp(3rem, 6vw, 5rem);
}
.article-container {
  max-width: 760px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2rem);
}

/* Intro lead */
.article-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.15rem);
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-200);
}

/* Body typography */
.article-body { font-size: 1.035rem; line-height: 1.8; color: var(--gray-700); }
.article-body p { margin-bottom: 1.35rem; }
.article-body p:last-child { margin-bottom: 0; }

.article-body h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.25;
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  padding-top: .25rem;
}
.article-body h3 {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: .75rem;
}

.article-body ul,
.article-body ol {
  margin: .25rem 0 1.35rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.article-body ul li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  line-height: 1.65;
}
.article-body ul li::before {
  content: '';
  flex-shrink: 0;
  width: 7px; height: 7px;
  background: var(--teal);
  border-radius: 50%;
  margin-top: .56em;
}
.article-body ol { counter-reset: art-ol; }
.article-body ol li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  line-height: 1.65;
  counter-increment: art-ol;
}
.article-body ol li::before {
  content: counter(art-ol);
  flex-shrink: 0;
  min-width: 24px; height: 24px;
  background: var(--teal-light);
  color: var(--teal-dark);
  border-radius: 50%;
  font-size: .78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: .15em;
}

.article-body strong { color: var(--navy); font-weight: 700; }
.article-body a { color: var(--teal-dark); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.article-body a:hover { color: var(--teal); }

.article-callout {
  background: var(--teal-light);
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  font-size: .975rem;
  color: var(--navy);
  font-weight: 500;
  line-height: 1.6;
}
.article-callout strong { color: inherit; }

.article-divider {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: 2.5rem 0;
}

/* ---------- Prev / Next navigation ---------- */
.article-nav-section {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  padding-block: 2.25rem;
}
.article-nav-inner {
  max-width: 760px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 580px) {
  .article-nav-inner { grid-template-columns: 1fr; }
}
.article-nav-link {
  display: flex;
  align-items: center;
  gap: .875rem;
  padding: 1.125rem 1.375rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.article-nav-link:hover {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0,180,204,.08);
}
.article-nav-link--next { justify-content: flex-end; text-align: right; }
.article-nav-icon {
  flex-shrink: 0;
  width: 36px; height: 36px;
  background: var(--teal-light);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--teal);
  transition: background var(--transition), color var(--transition);
}
.article-nav-link:hover .article-nav-icon { background: var(--teal); color: var(--white); }
.article-nav-icon svg { width: 17px; height: 17px; }
.article-nav-label {
  font-size: .7rem;
  color: var(--gray-500);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: .25rem;
  display: block;
}
.article-nav-title {
  font-size: .875rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  display: block;
}

/* ---------- Related articles ---------- */
.related-section {
  background: var(--white);
  padding-block: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--gray-200);
}
.related-section .section-header { margin-bottom: 2rem; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 860px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .related-grid { grid-template-columns: 1fr; }
}
.related-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}
.related-card:hover { border-color: var(--teal); transform: translateY(-2px); }
.related-card-img {
  height: 150px;
  overflow: hidden;
}
.related-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.related-card:hover .related-card-img img { transform: scale(1.04); }
.related-card-body {
  padding: 1rem 1.125rem;
  flex: 1;
}
.related-card-tag {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--teal-dark);
  display: block;
  margin-bottom: .4rem;
}
.related-card h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.35;
}

/* Article inline image */
.article-figure {
  margin: 2rem 0;
  border-radius: var(--radius);
  overflow: hidden;
}
.article-figure img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  display: block;
}
.article-figcaption {
  font-size: .8rem;
  color: var(--gray-500);
  padding: .6rem .875rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  line-height: 1.5;
}

/* Article intro list (questions before sections) */
.article-body .article-question-list {
  margin: .5rem 0 1.35rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.article-body .article-question-list li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  font-size: 1.015rem;
  color: var(--gray-700);
  line-height: 1.6;
}
.article-body .article-question-list li::before {
  content: '';
  flex-shrink: 0;
  width: 7px; height: 7px;
  background: var(--teal);
  border-radius: 50%;
  margin-top: .56em;
}

/* Active nav state */
.nav-active { color: var(--teal) !important; }