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

:root {
  --bg: #0D0D0F;
  --surface: #1A1A1E;
  --surface2: #222226;
  --border: #2A2A2E;
  --text: #E8E8EC;
  --text-dim: #8E8E96;
  --amber: #FF9500;
  --amber-dim: rgba(255, 149, 0, 0.12);
  --green: #39FF14;
  --radius: 12px;
  --radius-sm: 8px;
  --article-max: 740px;
}

/* ─── Light Mode ─── */
html.light {
  --bg: #F5F5F7;
  --surface: #FFFFFF;
  --surface2: #EBEBEF;
  --border: #DCDCE0;
  --text: #1A1A1E;
  --text-dim: #4A4A52;
}
html.light .blog-header {
  background: rgba(245, 245, 247, 0.88);
}
html.light .blog-cta-section {
  background: var(--surface);
}
html.light .blog-table tr:hover td {
  background: var(--surface2);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.7;
  min-height: 100vh;
}

/* ─── Brand ─── */
.brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.brand-dot, .brand-pro { color: var(--amber); }

/* ─── Buttons ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--amber);
  color: #000;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.1s;
  min-height: 44px;
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.88; }
.btn-primary:active { opacity: 0.78; transform: scale(0.97); }
.btn-cta-large {
  padding: 16px 52px;
  font-size: 18px;
  min-height: 56px;
  border-radius: 14px;
}

/* ─── Language Selector ─── */
.lang-select {
  -webkit-appearance: none;
  appearance: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--amber);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 5px 10px;
  cursor: pointer;
  outline: none;
  min-width: 40px;
  text-align: center;
  transition: border-color 0.15s;
  flex-shrink: 0;
}
.lang-select:focus,
.lang-select:hover { border-color: var(--amber); }

/* ─── Theme Toggle Button ─── */
.theme-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
  font-size: 15px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: border-color 0.15s;
  line-height: 1;
}
.theme-btn:hover { border-color: var(--amber); }

/* ─── Blog Header ─── */
.blog-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 13, 15, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.blog-header-inner {
  max-width: var(--article-max);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.blog-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}
.blog-nav-cta {
  padding: 9px 18px;
  font-size: 13px;
  min-height: 36px;
  border-radius: var(--radius-sm);
}

/* ─── Progress bar ─── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--amber);
  z-index: 100;
  transition: width 0.1s linear;
}

/* ─── Blog Main ─── */
.blog-main {
  max-width: var(--article-max);
  margin: 0 auto;
  padding: 52px 20px 72px;
}

/* ─── Breadcrumb / Meta ─── */
.blog-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.blog-breadcrumb {
  color: var(--amber);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
.blog-breadcrumb:hover { text-decoration: underline; }
.blog-meta-dot { font-size: 10px; color: var(--border); }
.blog-date,
.blog-read-time { font-size: 13px; color: var(--text-dim); }

/* ─── Article Typography ─── */
.blog-article h1 {
  font-size: clamp(26px, 4.5vw, 40px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: var(--text);
}
.blog-lead {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-dim);
  margin-bottom: 36px;
  font-weight: 400;
  border-left: 3px solid var(--amber);
  padding-left: 16px;
}
.blog-article h2 {
  font-size: 21px;
  font-weight: 650;
  color: var(--amber);
  margin: 52px 0 16px;
  line-height: 1.3;
  letter-spacing: -0.2px;
}
.blog-article h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 32px 0 10px;
  line-height: 1.35;
}
.blog-article p {
  font-size: 16px;
  color: var(--text-dim);
  margin-bottom: 20px;
  line-height: 1.78;
}
.blog-article p:last-child { margin-bottom: 0; }
.blog-article strong { color: var(--text); font-weight: 600; }
.blog-article em { font-style: italic; opacity: 0.9; }
.blog-article a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.blog-article a:hover { opacity: 0.8; }
/* Prevent article link color overriding CTA buttons inside .blog-article */
.blog-article a.btn-primary {
  color: #000;
  text-decoration: none;
}
.blog-article a.btn-primary:hover { opacity: 0.88; }

/* Lists */
.blog-article ul,
.blog-article ol {
  padding-left: 22px;
  margin-bottom: 22px;
}
.blog-article li {
  font-size: 16px;
  color: var(--text-dim);
  margin-bottom: 10px;
  line-height: 1.7;
  padding-left: 4px;
}
.blog-article li strong { color: var(--text); }
.blog-article ul li::marker { color: var(--amber); }
.blog-article ol li::marker { color: var(--amber); font-weight: 600; }

/* ─── Key Takeaways Box ─── */
.blog-takeaways {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 36px 0;
}
.blog-takeaways-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 14px;
}
.blog-takeaways ul {
  padding-left: 18px;
  margin-bottom: 0;
}
.blog-takeaways li {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 8px;
}
.blog-takeaways li:last-child { margin-bottom: 0; }
.blog-takeaways li::marker { color: var(--amber); }

/* ─── Tip / Info box ─── */
.blog-tip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 20px;
  margin: 28px 0;
}
.blog-tip p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.65;
}
.blog-tip-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: 6px;
}

/* ─── Warning box ─── */
.blog-warning {
  background: rgba(255, 149, 0, 0.06);
  border: 1px solid rgba(255, 149, 0, 0.3);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  margin: 28px 0;
}
.blog-warning p { margin-bottom: 0; font-size: 15px; }

/* ─── Data table ─── */
.blog-table-wrap { overflow-x: auto; margin: 28px 0; }
.blog-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.blog-table th {
  background: var(--surface);
  color: var(--amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.blog-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
  line-height: 1.5;
}
.blog-table td strong { color: var(--text); }
.blog-table tr:last-child td { border-bottom: none; }
.blog-table tr:hover td { background: var(--surface2); }

/* ─── Inline CTA ─── */
.blog-cta-inline {
  background: var(--surface);
  border: 1px solid rgba(255, 149, 0, 0.35);
  border-radius: var(--radius);
  padding: 24px;
  margin: 40px 0;
  text-align: center;
}
.blog-cta-inline p {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.55;
}
.blog-cta-inline .btn-primary {
  font-size: 15px;
  padding: 12px 30px;
}

/* ─── Step list ─── */
.blog-steps {
  counter-reset: steps;
  list-style: none;
  padding: 0;
  margin: 24px 0;
}
.blog-steps li {
  counter-increment: steps;
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  padding: 0;
  padding-left: 0;
}
.blog-steps li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--amber);
  color: #000;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
}
.blog-steps li::marker { content: none; }
.step-content strong {
  display: block;
  font-size: 15px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 4px;
}
.step-content p {
  font-size: 15px;
  margin-bottom: 0;
  color: var(--text-dim);
}

/* ─── Comparison grid ─── */
.blog-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 28px 0;
}
.blog-compare-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.blog-compare-card h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.3px;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.blog-compare-card ul {
  padding-left: 16px;
  margin: 0;
}
.blog-compare-card li {
  font-size: 14px;
  margin-bottom: 6px;
}

/* ─── FAQ ─── */
.blog-faq { margin: 16px 0; }
.blog-faq-item {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
.blog-faq-item:last-child { border-bottom: none; }
.blog-faq-q {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.4;
}
.blog-faq-a {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.7;
  margin: 0;
}

/* ─── Citation capsule ─── */
.blog-citation {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin: 24px 0;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.6;
  font-style: italic;
}
.blog-citation cite {
  display: block;
  font-style: normal;
  font-size: 12px;
  color: var(--amber);
  margin-top: 6px;
  font-weight: 600;
}

/* ─── Image placeholder / figure ─── */
.blog-figure {
  margin: 36px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.blog-figure img {
  width: 100%;
  height: auto;
  display: block;
}
.blog-figure figcaption {
  background: var(--surface);
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ─── HR divider ─── */
.blog-article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ─── Main CTA Section ─── */
.blog-cta-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 72px 20px;
}
.blog-cta-inner {
  max-width: var(--article-max);
  margin: 0 auto;
  text-align: center;
}
.blog-cta-inner h2 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.blog-cta-inner p {
  font-size: 16px;
  color: var(--text-dim);
  margin-bottom: 30px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.blog-cta-note {
  margin-top: 14px !important;
  font-size: 13px !important;
  opacity: 0.6;
}

/* ─── Footer ─── */
.blog-footer {
  padding: 32px 20px;
  border-top: 1px solid var(--border);
}
.blog-footer-inner {
  max-width: var(--article-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.blog-footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.blog-footer-links a {
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.15s;
}
.blog-footer-links a:hover { opacity: 1; }
.footer-sep {
  font-size: 10px;
  color: var(--border);
}

/* ─── RTL Support ─── */
[dir="rtl"] .blog-header-inner { flex-direction: row-reverse; }
[dir="rtl"] .blog-nav { flex-direction: row-reverse; }
[dir="rtl"] .blog-footer-inner { flex-direction: row-reverse; }
[dir="rtl"] .blog-lead { border-left: none; border-right: 3px solid var(--amber); padding-left: 0; padding-right: 16px; }
[dir="rtl"] .blog-tip { border-left: 1px solid var(--border); border-right: 3px solid var(--amber); border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
[dir="rtl"] .blog-article ul,
[dir="rtl"] .blog-article ol { padding-left: 0; padding-right: 22px; }
[dir="rtl"] .blog-steps li { flex-direction: row-reverse; }
[dir="rtl"] .blog-takeaways ul { padding-left: 0; padding-right: 18px; }
[dir="rtl"] .blog-compare-card ul { padding-left: 0; padding-right: 16px; }
[dir="rtl"] .blog-table th,
[dir="rtl"] .blog-table td { text-align: right; }
[dir="rtl"] .blog-meta { flex-direction: row-reverse; }

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .blog-main { padding: 36px 16px 56px; }
  .blog-article h1 { font-size: 26px; }
  .blog-article h2 { font-size: 19px; margin: 40px 0 14px; }
  .blog-lead { font-size: 16px; }
  .blog-nav-cta { display: none; }
  .blog-cta-section { padding: 52px 16px; }
  .blog-cta-inner p { margin-bottom: 24px; }
  .blog-footer-inner { flex-direction: column; align-items: flex-start; }
  .blog-compare { grid-template-columns: 1fr; }
  .blog-table { font-size: 13px; }
  .blog-table th,
  .blog-table td { padding: 8px 10px; }
  .reading-progress { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn-primary { transition: none; }
}