:root {
  --bg-primary: #0a0a0c;
  --bg-card: #121216;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.22);
  --text-primary: #f4f4f6;
  --text-secondary: #9ba1b0;
  --text-muted: #626775;
  --tg-blue: #2481cc;
  --tg-blue-hover: #1c68a6;
  --tg-blue-light: #38a5f8;
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-code: "JetBrains Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  width: 100%;
}

.blog-wrapper {
  max-width: min(94vw, 44rem);
  width: 100%;
  padding: clamp(1rem, 3dvh, 2.5rem) clamp(0.75rem, 3.5vw, 1.5rem);
  margin: 0 auto;
}

/* Navigation Header */
.blog-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: clamp(0.75rem, 2.5vw, 1.25rem);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--border-color);
  width: 100%;
  gap: 0.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: clamp(1rem, 3.5vw, 1.15rem);
}

.nav-logo {
  width: clamp(1.75rem, 5vw, 2.25rem);
  height: clamp(1.75rem, 5vw, 2.25rem);
  border-radius: 0.5rem;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: clamp(0.5rem, 2vw, 1rem);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: clamp(0.85rem, 2.5vw, 0.95rem);
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: 0.375rem;
  transition: color 0.2s ease, background-color 0.2s ease;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.06);
}

/* Breadcrumb / Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  text-decoration: none !important;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  transition: color 0.2s ease, border-color 0.2s ease;
  padding: 0.35rem 0.65rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
}

.back-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* Article Header */
.article-header {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(36, 129, 204, 0.12);
  color: var(--tg-blue-light);
  border: 1px solid rgba(36, 129, 204, 0.3);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
}

.article-title {
  font-size: clamp(1.6rem, 5.8vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 0.85rem;
  text-wrap: balance;
  word-break: break-word;
}

.article-meta {
  display: flex;
  gap: clamp(0.5rem, 2vw, 1rem);
  color: var(--text-muted);
  font-size: clamp(0.78rem, 2vw, 0.85rem);
  flex-wrap: wrap;
  align-items: center;
}

/* Article Content Typography */
.article-content h2 {
  font-size: clamp(1.25rem, 4vw, 1.7rem);
  font-weight: 700;
  margin-top: clamp(1.75rem, 4.5vw, 2.5rem);
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.35rem;
  line-height: 1.35;
  word-break: break-word;
}

.article-content h3 {
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-content p {
  color: var(--text-secondary);
  font-size: clamp(0.95rem, 2.5vw, 1.05rem);
  margin-bottom: 1.25rem;
  line-height: 1.8;
  word-break: break-word;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.35rem 1.15rem;
  color: var(--text-secondary);
  padding-left: 0.25rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
  font-size: clamp(0.925rem, 2.3vw, 1.025rem);
}

.article-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Specific text link styles (NEVER apply to .btn or .back-link) */
.article-content a:not(.btn):not(.back-link):not(.nav-brand):not(.nav-link):not(.post-card) {
  color: var(--tg-blue-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-word;
  transition: color 0.2s ease;
}

.article-content a:not(.btn):not(.back-link):not(.nav-brand):not(.nav-link):not(.post-card):hover {
  color: #60b6f9;
}

/* Callout Box */
.callout {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--tg-blue);
  border-radius: 0.5rem;
  padding: clamp(0.9rem, 3vw, 1.35rem);
  margin: 1.5rem 0;
  word-break: break-word;
  font-size: clamp(0.9rem, 2.3vw, 0.975rem);
}

.callout-title {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  font-size: clamp(0.95rem, 2.5vw, 1.05rem);
}

/* Code Blocks */
pre {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: clamp(0.75rem, 2.5vw, 1.15rem);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.35rem 0;
  max-width: 100%;
}

code {
  font-family: var(--font-code);
  font-size: 0.88em;
  color: #e2e8f0;
}

pre code {
  word-break: normal;
  white-space: pre;
  display: block;
}

:not(pre) > code {
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.15rem 0.35rem;
  border-radius: 0.25rem;
  word-break: break-word;
}

/* Comparison Table with Mobile Scroll Indicator */
.table-wrapper {
  position: relative;
  margin: 1.5rem 0;
}

.table-hint {
  display: none;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-bottom: 0.35rem;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: clamp(0.8rem, 2.2vw, 0.9rem);
  min-width: 28rem;
}

th, td {
  padding: clamp(0.6rem, 2vw, 0.8rem) clamp(0.65rem, 2.2vw, 0.95rem);
  border-bottom: 1px solid var(--border-color);
  line-height: 1.5;
}

th {
  background-color: #16161c;
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
}

td {
  background-color: var(--bg-card);
  color: var(--text-secondary);
}

/* FAQ Box */
.faq-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: clamp(0.9rem, 3vw, 1.35rem);
  margin-bottom: 0.85rem;
}

.faq-q {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  font-size: clamp(0.925rem, 2.4vw, 1.05rem);
  line-height: 1.4;
}

.faq-a {
  color: var(--text-secondary);
  font-size: clamp(0.875rem, 2.3vw, 0.95rem);
  line-height: 1.7;
}

/* Article CTA Box */
.article-cta {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: clamp(1.5rem, 5vw, 2.5rem);
  text-align: center;
  margin-top: clamp(2rem, 5vw, 3.25rem);
  width: 100%;
}

.article-cta h3 {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.article-cta p {
  color: var(--text-secondary);
  max-width: 32rem;
  margin: 0 auto 1.5rem;
  font-size: clamp(0.9rem, 2.4vw, 1.05rem);
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  gap: clamp(0.75rem, 2.5vw, 1rem);
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
  width: 100%;
}

/* 100% Identical Buttons with Guaranteed White Font on Primary Button */
.btn {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.625rem !important;
  padding: clamp(0.75rem, 2vw, 0.9rem) clamp(1.25rem, 3.5vw, 1.75rem) !important;
  border-radius: 0.625rem !important;
  font-size: clamp(0.875rem, 2vw, 0.95rem) !important;
  font-weight: 600 !important;
  text-decoration: none !important;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease !important;
  min-height: 3rem !important;
  cursor: pointer !important;
  flex: 1 1 auto !important;
  max-width: 100% !important;
}

.btn svg {
  width: clamp(1.125rem, 2.5vw, 1.25rem) !important;
  height: clamp(1.125rem, 2.5vw, 1.25rem) !important;
  flex-shrink: 0 !important;
}

.btn-primary,
a.btn-primary,
.article-content a.btn-primary,
.article-content .article-cta a.btn-primary {
  background-color: var(--tg-blue) !important;
  color: #ffffff !important;
  border: 1px solid transparent !important;
  text-decoration: none !important;
}

.btn-primary span,
a.btn-primary span,
.article-content a.btn-primary span {
  color: #ffffff !important;
}

.btn-primary:hover,
a.btn-primary:hover,
.article-content a.btn-primary:hover,
.article-content .article-cta a.btn-primary:hover {
  background-color: var(--tg-blue-hover) !important;
  color: #ffffff !important;
  transform: translateY(-0.125rem) !important;
}

.btn-secondary,
a.btn-secondary,
.article-content a.btn-secondary,
.article-content .article-cta a.btn-secondary {
  background-color: var(--bg-card) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
  text-decoration: none !important;
}

.btn-secondary span,
a.btn-secondary span,
.article-content a.btn-secondary span {
  color: var(--text-primary) !important;
}

.btn-secondary:hover,
a.btn-secondary:hover,
.article-content a.btn-secondary:hover,
.article-content .article-cta a.btn-secondary:hover {
  border-color: var(--border-hover) !important;
  background-color: #1a1a22 !important;
  color: var(--text-primary) !important;
  transform: translateY(-0.125rem) !important;
}

/* Blog Hub Index Cards */
.posts-grid {
  display: grid;
  gap: clamp(0.85rem, 2.5vw, 1.35rem);
  margin-top: 1.5rem;
  width: 100%;
}

.post-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.65rem;
  padding: clamp(1rem, 2.8vw, 1.4rem);
  text-decoration: none !important;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: block;
}

.post-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-0.125rem);
}

.post-card-title {
  font-size: clamp(1.05rem, 2.8vw, 1.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
  line-height: 1.35;
}

.post-card-desc {
  color: var(--text-secondary);
  font-size: clamp(0.85rem, 2.2vw, 0.925rem);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}

.post-card-meta {
  color: var(--text-muted);
  font-size: 0.78rem;
}

/* Footer */
footer {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  color: var(--text-muted);
  font-size: clamp(0.78rem, 2vw, 0.85rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  width: 100%;
}

footer a {
  color: var(--tg-blue);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

footer a:hover {
  color: var(--tg-blue-hover);
  text-decoration: underline;
}

/* Dedicated Mobile Breakpoint (< 580px) */
@media (max-width: 36.25em) {
  .blog-wrapper {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .table-hint {
    display: block;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .blog-nav {
    flex-direction: row;
    justify-content: space-between;
  }

  .nav-brand span {
    font-size: 1rem;
  }
}