/* ==========================================================================
   ThinkyPlay blog stylesheet
   File: css/blog.css
   Purpose: Styles for the main blog index page.
   ========================================================================== */

/* ==========================================================================
   Blog hero
   ========================================================================== */

.blog-hero {
  position: relative;
  overflow: hidden;
  padding: 3rem 0 1.75rem;
}

.blog-hero::before {
  content: "";
  position: absolute;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background:
    radial-gradient(
      circle,
      rgba(6, 182, 212, 0.12),
      transparent 68%
    );
  pointer-events: none;
}

.blog-hero-banner {
  position: relative;
  padding: 3rem;
  border-radius: 28px;
  background:
    linear-gradient(
      135deg,
      rgba(6, 182, 212, 0.1),
      rgba(139, 92, 246, 0.12)
    ),
    var(--bg-card);
  border: 1px solid var(--border-soft);
  overflow: hidden;
}

.blog-hero-banner::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  background:
    radial-gradient(
      circle,
      rgba(139, 92, 246, 0.18),
      transparent 70%
    );
  pointer-events: none;
}

.blog-hero-banner::after {
  content: "";
  position: absolute;
  bottom: -140px;
  left: -80px;
  width: 300px;
  height: 300px;
  background:
    radial-gradient(
      circle,
      rgba(6, 182, 212, 0.16),
      transparent 70%
    );
  pointer-events: none;
}

.blog-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}

.blog-hero-inner .breadcrumbs {
  justify-content: center;
  margin-bottom: 1.25rem;
}

.blog-hero-inner h1 {
  margin-bottom: 0.75rem;
}

.blog-hero-inner p {
  color: var(--text-muted);
  margin-bottom: 0;
}

.blog-hero-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.blog-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Blog sections
   ========================================================================== */

.blog-section {
  padding-block: 4rem;
}

.blog-section-head {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.blog-section-head.center {
  margin-inline: auto;
  text-align: center;
}

.blog-section-head p {
  color: var(--text-muted);
}

/* ==========================================================================
   Featured post
   ========================================================================== */

.blog-featured-card {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  transition:
    transform 0.28s ease,
    border-color 0.28s ease,
    box-shadow 0.28s ease;
}

.blog-featured-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.45);
  box-shadow: var(--shadow-md);
}

.blog-featured-cover {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  overflow: hidden;
}

.blog-featured-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(
      rgba(255, 255, 255, 0.07) 1px,
      transparent 1px
    );
  background-size: 24px 24px;
  opacity: 0.24;
}

.blog-featured-icon {
  position: relative;
  z-index: 1;
  width: 84px;
  height: 84px;
  color: #ffffff;
  opacity: 0.92;
  transition: transform 0.3s ease;
}

.blog-featured-card:hover .blog-featured-icon {
  transform: scale(1.08);
}

.blog-featured-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1rem;
  padding: 2.2rem;
}

.blog-featured-title {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.25;
}

.blog-featured-title a {
  color: var(--text-heading);
}

.blog-featured-title a:hover {
  color: var(--accent-secondary);
}

.blog-featured-excerpt {
  margin: 0;
  color: var(--text-muted);
}

/* ==========================================================================
   Blog grid
   ========================================================================== */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  transition:
    transform 0.28s ease,
    border-color 0.28s ease,
    box-shadow 0.28s ease;
}

.blog-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: var(--shadow-md);
}

.blog-card-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex: 1;
  gap: 0.85rem;
  padding: 1.35rem;
}

.blog-card-title {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.3;
}

.blog-card-title a {
  color: var(--text-heading);
}

.blog-card-title a:hover {
  color: var(--accent-secondary);
}

.blog-card-excerpt {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  flex: 1;
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.blog-read-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.35rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-secondary);
}

.blog-read-link:hover {
  color: #ffffff;
}

/* ==========================================================================
   Blog cover visuals
   ========================================================================== */

.blog-cover {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--border-soft);
}

.blog-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(
      rgba(255, 255, 255, 0.07) 1px,
      transparent 1px
    );
  background-size: 22px 22px;
  opacity: 0.22;
}

.blog-cover-icon {
  position: relative;
  z-index: 1;
  width: 54px;
  height: 54px;
  color: #ffffff;
  opacity: 0.92;
  transition: transform 0.3s ease;
}

.blog-card:hover .blog-cover-icon,
.blog-featured-card:hover .blog-featured-icon {
  transform: scale(1.08);
}

.blog-cover-memory,
.blog-featured-memory {
  background: linear-gradient(135deg, #312E81, #7C3AED);
}

.blog-cover-math,
.blog-featured-math {
  background: linear-gradient(135deg, #064E3B, #06B6D4);
}

.blog-cover-words,
.blog-featured-words {
  background: linear-gradient(135deg, #78350F, #F59E0B);
}

.blog-cover-typing,
.blog-featured-typing {
  background: linear-gradient(135deg, #4A044E, #EC4899);
}

.blog-cover-logic,
.blog-featured-logic {
  background: linear-gradient(135deg, #083344, #2DD4BF);
}

/* ==========================================================================
   Blog tags
   ========================================================================== */

.blog-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  color: var(--text-muted);
}

.blog-tag-memory {
  background: rgba(139, 92, 246, 0.14);
  border-color: rgba(139, 92, 246, 0.3);
  color: #A78BFA;
}

.blog-tag-math {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34D399;
}

.blog-tag-words {
  background: rgba(251, 191, 36, 0.14);
  border-color: rgba(251, 191, 36, 0.3);
  color: #FBBF24;
}

.blog-tag-typing {
  background: rgba(236, 72, 153, 0.14);
  border-color: rgba(236, 72, 153, 0.3);
  color: #F472B6;
}

.blog-tag-logic {
  background: rgba(6, 182, 212, 0.14);
  border-color: rgba(6, 182, 212, 0.3);
  color: #22D3EE;
}

/* ==========================================================================
   Bottom CTA
   ========================================================================== */

.blog-bottom-cta {
  margin-top: 4rem;
  padding: 3.5rem 2rem;
  text-align: center;
  background:
    linear-gradient(
      135deg,
      rgba(139, 92, 246, 0.12),
      rgba(6, 182, 212, 0.1)
    ),
    var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 24px;
}

.blog-bottom-cta p {
  color: var(--text-muted);
  max-width: 560px;
  margin-inline: auto;
}

.blog-bottom-cta .btn {
  margin-top: 1rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .blog-featured-card {
    grid-template-columns: 1fr;
  }

  .blog-featured-cover {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }

  .blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .blog-hero {
    padding: 1.75rem 0 1rem;
  }

  .blog-hero-banner {
    padding: 1.5rem;
    border-radius: 20px;
  }

  .blog-section {
    padding-block: 3rem;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-featured-body {
    padding: 1.5rem;
  }

  .blog-bottom-cta {
    padding: 2.5rem 1.5rem;
  }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .blog-card,
  .blog-featured-card,
  .blog-cover-icon,
  .blog-featured-icon {
    transition: none;
  }

  .blog-card:hover,
  .blog-featured-card:hover,
  .blog-cover-icon:hover,
  .blog-featured-card:hover .blog-featured-icon {
    transform: none;
  }
}

/* ==========================================================================
   Blog image support
   ========================================================================== */

.blog-cover {
  display: block;
  padding: 0;
}

.blog-cover::before,
.blog-featured-cover::before {
  display: none;
}

.blog-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.blog-card:hover .blog-cover img {
  transform: scale(1.04);
}

.blog-featured-cover {
  position: relative;
  min-height: 320px;
}

.blog-featured-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 900px) {
  .blog-featured-cover {
    aspect-ratio: 16 / 9;
    min-height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-cover img,
  .blog-featured-cover img {
    transition: none;
  }

  .blog-card:hover .blog-cover img {
    transform: none;
  }
}

/* ==========================================================================
   Single blog post styles
   ========================================================================== */

.post-hero {
  padding: 2.75rem 0 1.5rem;
}

.post-tag {
  display: inline-flex;
  padding: 0.32rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #A78BFA;
  margin-bottom: 1rem;
}

.post-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 0.9rem;
}

.post-intro {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 760px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-featured {
  margin-top: 1.75rem;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.post-featured img {
  width: 100%;
  height: auto;
  display: block;
}

.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2.5rem;
  align-items: start;
  padding-block: 3rem;
}

.post-sidebar {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (max-width: 1020px) {
  .post-layout {
    grid-template-columns: 1fr;
  }

  .post-sidebar {
    position: static;
  }
}

.post-body p {
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

.post-body h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.9rem;
  scroll-margin-top: 90px;
}

.post-takeaways {
  padding: 1.5rem;
  border-radius: 20px;
  background:
    linear-gradient(
      135deg,
      rgba(139, 92, 246, 0.12),
      rgba(6, 182, 212, 0.08)
    ),
    var(--bg-card);
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.post-takeaways h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.post-takeaways ul {
  list-style: disc;
  padding-left: 1.2rem;
}

.post-takeaways li {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.post-steps {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1.25rem 0;
}

.post-step {
  display: flex;
  gap: 0.9rem;
  padding: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
}

.post-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.15);
  color: #A78BFA;
  font-weight: 700;
}

.post-step p {
  margin: 0;
}

.post-doavoid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}

.post-do,
.post-avoid {
  padding: 1.25rem;
  border-radius: 16px;
}

.post-do {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.post-avoid {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.post-do h3 {
  color: #34D399;
  font-size: 1rem;
  margin-bottom: 0.6rem;
}

.post-avoid h3 {
  color: #F87171;
  font-size: 1rem;
  margin-bottom: 0.6rem;
}

.post-do ul,
.post-avoid ul {
  list-style: disc;
  padding-left: 1.1rem;
}

.post-do li,
.post-avoid li {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

@media (max-width: 640px) {
  .post-doavoid {
    grid-template-columns: 1fr;
  }
}

.post-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem;
  border-radius: 16px;
  background:
    linear-gradient(
      135deg,
      rgba(139, 92, 246, 0.14),
      rgba(6, 182, 212, 0.1)
    ),
    var(--bg-card);
  border: 1px solid var(--border-color);
  margin: 1.5rem 0;
}

.post-callout p {
  margin: 0;
  color: var(--text-main);
  font-weight: 600;
}

.post-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
}

.post-table th,
.post-table td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
  font-size: 0.95rem;
}

.post-table th {
  color: var(--text-muted);
}

.post-table td {
  color: var(--text-muted);
}

.post-pullquote {
  border-left: 4px solid var(--accent-primary);
  padding: 0.5rem 0 0.5rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 1.15rem;
  color: var(--text-main);
  font-weight: 600;
}

.post-author {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1.5rem;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  margin-top: 2rem;
}

.post-author-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8B5CF6, #06B6D4);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
}

.post-author-name {
  font-weight: 700;
  color: var(--text-heading);
}

.post-author-bio {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.post-related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

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

/* Sidebar cards */
.bp-card {
  padding: 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
}

.bp-title {
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

.bp-toc a {
  display: block;
  padding: 0.45rem 0.8rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  border-left: 2px solid var(--border-soft);
}

.bp-toc a:hover {
  color: var(--text-main);
  border-color: var(--accent-secondary);
}

.bp-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bp-list a {
  display: block;
  padding: 0.8rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  color: var(--text-main);
  font-size: 0.92rem;
  line-height: 1.35;
}

.bp-list a:hover {
  border-color: var(--accent-secondary);
  color: var(--text-main);
}

.bp-list .bp-meta {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Meta pills */
.post-meta {
  gap: 0.6rem;
}

.post-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.post-meta-item svg {
  width: 14px;
  height: 14px;
}

.post-meta-author {
  color: #A78BFA;
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.1);
  font-weight: 600;
}

/* Author logo */
.post-author-logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  flex-shrink: 0;
}

/* Related cards */
.post-related-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.post-related-card:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
}

.post-related-card img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

.post-related-title {
  padding: 0 0.9rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-heading);
  line-height: 1.3;
}

.post-related-date {
  padding: 0 0.9rem 0.9rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}