/* =============================================================
   HYDROSOLAR – Blog Stylesheet
   Contains styles for blog.html and article pages
   Fonts: Space Grotesk (headings) + DM Sans (body)
============================================================= */

/* ─── 1. HERO SECTION & LAYOUT ────────────────────────────── */
.blog-hero {
  padding: 180px 0 80px;
  text-align: center;
  position: relative;
}

.blog-main {
  padding: 40px 0 100px;
}

/* ─── 2. BLOG LISTING (blog.html) ────────────────────────── */
.featured-blog-section {
  margin-bottom: var(--space-16);
}

.featured-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-8);
  background: var(--white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.featured-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(17, 161, 57, 0.3);
}

.featured-img-wrap {
  position: relative;
  overflow: hidden;
  min-height: 380px;
}

.featured-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-card:hover .featured-img {
  transform: scale(1.05);
}

.featured-content {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.blog-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: 0.8rem;
  font-weight: 700;
}

.meta-tag {
  color: var(--green-600);
  background: rgba(17, 161, 57, 0.08);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.meta-reading-time {
  color: var(--gray-500);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.featured-title {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  margin-bottom: var(--space-4);
  color: var(--gray-900);
  line-height: 1.3;
}

.featured-desc {
  color: var(--gray-600);
  font-size: 1.05rem;
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.blog-author-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
}

.author-img-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-green);
  color: var(--white);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  border: 2px solid var(--white);
  box-shadow: var(--shadow-sm);
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--gray-900);
}

.pub-date {
  font-size: 0.75rem;
  color: var(--gray-500);
}

/* Post Grid */
.blog-grid-header {
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: var(--space-4);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-8);
}

.blog-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(17, 161, 57, 0.2);
}

.blog-card-img-wrap {
  position: relative;
  overflow: hidden;
  height: 220px;
}

.blog-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card-img {
  transform: scale(1.05);
}

.blog-card-content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card-title {
  font-size: 1.25rem;
  margin: var(--space-3) 0 var(--space-2);
  color: var(--gray-900);
  line-height: 1.4;
}

.blog-card-desc {
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.blog-card-footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── 3. BLOG POST DETAILED PAGE (article.html) ──────────── */
.article-wrapper {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}

.article-main-content {
  width: 100%;
  padding: 0;
}

.article-header {
  margin-bottom: var(--space-8);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--green-600);
}

.breadcrumb-separator {
  width: 12px;
  height: 12px;
  color: var(--gray-400);
}

.article-title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: var(--space-6);
  color: var(--gray-900);
}

.article-hero-image-wrap {
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.article-hero-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Premium Typography for Reading */
.article-body {
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--gray-700);
}

.article-body p {
  margin-bottom: var(--space-6);
}

.article-body h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  margin: var(--space-10) 0 var(--space-4);
  color: var(--gray-900);
  position: relative;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gray-100);
}

.article-body h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--green-500);
}

.article-body h3 {
  font-size: 1.3rem;
  margin: var(--space-8) 0 var(--space-3);
  color: var(--gray-900);
}

/* Inline list styling */
.article-body ul {
  list-style: none;
  margin-bottom: var(--space-6);
  padding-left: var(--space-4);
}

.article-body ul li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
}

.article-body ul li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--green-500);
  font-size: 1.5rem;
  line-height: 1;
  top: -2px;
}

.article-body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.article-body ol li {
  margin-bottom: var(--space-3);
  padding-left: var(--space-2);
}

/* Blockquotes / Pullquotes */
.article-blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-8);
  background: rgba(17, 161, 57, 0.03);
  border-left: 4px solid var(--green-500);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--gray-800);
}

/* Styled Table of Contents & Inline Data Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-8) 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.article-table th {
  background: var(--gray-900);
  color: var(--white);
  padding: 14px 18px;
  font-weight: 600;
  font-family: var(--font-primary);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:nth-child(even) {
  background: var(--gray-50);
}

/* Inline Blog Images */
.article-image-figure {
  margin: var(--space-8) 0;
  text-align: center;
}

.article-image-figure img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin: 0 auto;
  border: 4px solid var(--white);
  max-width: 700px;
  width: 100%;
  height: auto;
  display: block;
}

.article-image-caption {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: var(--space-3);
  font-style: italic;
}

/* FAQ Accordion Section */
.faq-section-wrapper {
  margin-top: var(--space-12);
  padding-top: var(--space-10);
  border-top: 1px solid var(--gray-200);
}

.accordion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.accordion-item {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.accordion-item.active {
  border-color: rgba(17, 161, 57, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--white);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  text-align: left;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gray-900);
  gap: var(--space-4);
  transition: color var(--transition-fast);
}

.accordion-header:hover {
  color: var(--green-600);
}

.accordion-icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-base);
  color: var(--gray-500);
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--green-500);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base) ease-out;
}

.accordion-content {
  padding: 0 24px 20px;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--gray-600);
}

/* Citations & References */
.references-section {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-200);
}

.references-list {
  list-style: none;
  padding-left: 0;
}

.references-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--gray-600);
}

.references-list li::before {
  content: attr(data-number);
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--green-600);
}

.reference-link {
  color: var(--green-600);
  text-decoration: underline;
  word-break: break-all;
  font-size: 0.88rem;
}

.reference-link:hover {
  color: var(--green-800);
}

/* ─── 4. TABLE OF CONTENTS & CTA BANNER ──────────────────── */
.article-toc-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}

.toc-card-title {
  font-size: 1.2rem;
  font-family: var(--font-primary);
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: var(--space-2);
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
}

.toc-link {
  font-size: 0.95rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.toc-link:hover {
  color: var(--green-600);
  transform: translateX(4px);
}

.toc-link.active {
  color: var(--green-600);
  font-weight: 600;
}

.toc-link.active::before {
  content: "";
  width: 4px;
  height: 12px;
  background: var(--green-500);
  border-radius: var(--radius-full);
}

/* Bottom CTA Banner */
.article-bottom-cta {
  background: var(--gradient-green);
  color: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  margin-top: var(--space-12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  box-shadow: var(--shadow-green);
}

.cta-banner-content h3 {
  font-size: 1.8rem;
  color: var(--white);
  margin-bottom: var(--space-2);
  font-family: var(--font-primary);
  border: none;
  padding: 0;
}

.cta-banner-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0;
}

.cta-banner-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 240px;
}

.cta-banner-actions .btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  text-align: center;
}

.btn-white {
  background: var(--white);
  color: var(--green-700) !important;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white) !important;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Author widget profile card */
.author-card-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-green);
  color: var(--white);
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.author-card-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
}

.author-card-role {
  font-size: 0.78rem;
  color: var(--green-600);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: var(--space-3);
  letter-spacing: 0.05em;
}

.author-card-bio {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--gray-600);
}

/* ─── 5. RESPONSIVENESS ───────────────────────────────────── */
@media (max-width: 992px) {
  .article-wrapper {
    gap: var(--space-8);
  }

  .sidebar {
    position: static;
  }

  .featured-card {
    grid-template-columns: 1fr;
  }

  .featured-img-wrap {
    min-height: 250px;
  }
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .accordion-header {
    padding: 16px 20px;
    font-size: 0.98rem;
  }

  .accordion-content {
    padding: 0 20px 16px;
  }

  .article-bottom-cta {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    padding: var(--space-6);
    gap: var(--space-6);
  }

  .cta-banner-actions {
    min-width: 100%;
  }
}

/* ─── 6. MODERN REDESIGN ADDITIONS ───────────────────────── */
.blog-hero-modern {
  position: relative;
  overflow: hidden;
  padding: 160px 0 20px;
}

.blog-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(
      circle at top right,
      rgba(17, 161, 57, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at bottom left,
      rgba(14, 165, 233, 0.1) 0%,
      transparent 50%
    );
  z-index: 1;
}

.blog-hero-modern .container {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
}

.glass-panel {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8);
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
  max-width: 800px;
  text-align: center;
}

.section-tag-hero {
  display: inline-block;
  margin-bottom: var(--space-6);
  background: rgba(17, 161, 57, 0.1);
}

.blog-hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.blog-hero-title span {
  color: var(--green-600);
}

.blog-hero-desc {
  color: var(--gray-700);
  font-size: 1.15rem;
  line-height: 1.8;
  margin: 0 auto;
  max-width: 600px;
}

/* Featured Overlapping Card */
.featured-card-modern {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 80px; /* Space for the overlapping content */
}

@media (min-width: 992px) {
  .featured-card-modern {
    flex-direction: row;
    align-items: flex-end;
    padding-bottom: 0;
  }
}

.featured-img-wrap-modern {
  width: 100%;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  min-height: 400px;
}

.featured-img-wrap-modern img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-card-modern:hover .featured-img-wrap-modern img {
  transform: scale(1.03);
}

.glass-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
  width: 90%;
  margin-top: -80px;
  position: relative;
  z-index: 2;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

@media (min-width: 992px) {
  .glass-card {
    width: 45%;
    margin-top: 0;
    margin-left: -100px;
    margin-bottom: 40px;
  }
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Category Filters */
.modern-grid-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .modern-grid-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.grid-section-title {
  font-size: 2rem;
  color: var(--gray-900);
  margin: 0;
}

.category-filters {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none; /* Firefox */
}
.category-filters::-webkit-scrollbar {
  display: none; /* Safari and Chrome */
}

.filter-btn {
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-600);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background: var(--gray-50);
  border-color: var(--gray-300);
}

.filter-btn.active {
  background: var(--green-600);
  color: var(--white);
  border-color: var(--green-600);
  box-shadow: var(--shadow-sm);
}

/* Modern Blog Card */
.blog-card-modern {
  background: var(--white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--gray-100);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.blog-card-modern::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-2xl);
  border: 2px solid transparent;
  pointer-events: none;
  transition: border-color 0.4s ease;
}

.blog-card-modern:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 32px rgba(17, 161, 57, 0.12);
}

.blog-card-modern:hover::after {
  border-color: rgba(17, 161, 57, 0.3);
}

/* Newsletter CTA */
.newsletter-cta-section {
  margin-top: 6rem;
}

.newsletter-banner {
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
  position: relative;
  overflow: hidden;
  background: var(--green-600);
}

.newsletter-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at center,
    rgba(17, 161, 57, 0.3) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.newsletter-content {
  position: relative;
  z-index: 2;
  color: var(--white);
}

.newsletter-content h3 {
  font-size: 3.2rem;
  margin-bottom: var(--space-2);
  color: white;
}

.newsletter-content p {
  font-size: 1.1rem;
  color: var(--gray-300);
  max-width: 500px;
  margin: 0 auto;
}

.newsletter-form {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 450px;
}

@media (min-width: 600px) {
  .newsletter-form {
    flex-direction: row;
    background: rgba(255, 255, 255, 0.1);
    padding: 6px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
}

.newsletter-input {
  flex: 1;
  padding: 14px 24px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  font-family: var(--font-primary);
  font-size: 1rem;
  outline: none;
  transition:
    background 0.3s,
    border-color 0.3s;
}

@media (min-width: 600px) {
  .newsletter-input {
    border: none;
    background: transparent;
  }
}

.newsletter-input:focus {
  background: rgba(255, 255, 255, 0.15);
}

.newsletter-input::placeholder {
  color: var(--gray-400);
}

.newsletter-btn {
  padding: 14px 28px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}