/* =========================
   GLOBAL RESET
========================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  background-color: #f8fafc;
  color: #0f172a;
  line-height: 1.75;
  font-size: 16px;
}

/* =========================
   LINKS
========================= */
a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}

a:hover {
  text-decoration: underline;
}

/* =========================
   HEADER
========================= */
.blog-header {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #ffffff;
  padding: 64px 20px;
  text-align: center;
}

.blog-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 12px;
  line-height: 1.3;
}

.blog-header p {
  font-size: 1.1rem;
  color: #cbd5f5;
  max-width: 800px;
  margin: 0 auto;
}

/* =========================
   MAIN CONTENT
========================= */
.blog-content {
  max-width: 900px;
  margin: 60px auto;
  padding: 0 20px;
}

article {
  background: #ffffff;
  padding: 48px;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}

/* =========================
   HEADINGS
========================= */
article h2 {
  font-size: 1.6rem;
  margin-top: 48px;
  margin-bottom: 16px;
  color: #020617;
}

article h3 {
  font-size: 1.25rem;
  margin-top: 32px;
  margin-bottom: 12px;
  color: #020617;
}

/* =========================
   TEXT & PARAGRAPHS
========================= */
article p {
  margin-bottom: 18px;
  color: #1e293b;
}

/* =========================
   LISTS
========================= */
article ul,
article ol {
  margin: 20px 0 30px 24px;
}

article li {
  margin-bottom: 10px;
}

/* =========================
   CALLOUT / NOTE
========================= */
.note,
.callout {
  background: #eff6ff;
  border-left: 5px solid #2563eb;
  padding: 20px 24px;
  margin: 40px 0;
  border-radius: 10px;
}

.note p,
.callout p {
  margin-bottom: 10px;
}

/* =========================
   CTA LINKS
========================= */
article a.cta {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 22px;
  background: #2563eb;
  color: #ffffff;
  border-radius: 10px;
  font-weight: 600;
}

article a.cta:hover {
  background: #1d4ed8;
  text-decoration: none;
}

/* =========================
   INTERNAL LINKS SECTION
========================= */
.related-links {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid #e2e8f0;
}

.related-links h3 {
  margin-bottom: 12px;
}

.related-links a {
  display: block;
  margin-bottom: 8px;
}

/* =========================
   FOOTER
========================= */
.blog-footer {
  text-align: center;
  margin: 80px 0 40px;
  color: #64748b;
  font-size: 0.95rem;
}

/* =========================
   FORMS (Certificate / Verify)
========================= */
form label {
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

form input {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  font-size: 1rem;
  margin-bottom: 20px;
}

form button {
  width: 100%;
  padding: 14px;
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
}

form button:hover {
  background: #1d4ed8;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
  article {
    padding: 32px 24px;
  }

  .blog-header {
    padding: 48px 16px;
  }

  .blog-content {
    margin: 40px auto;
  }
}