@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --font-family: 'Plus Jakarta Sans', sans-serif;
  --bg-color: #003366;
  --bg-card: #1C2128;
  --bg-card-hover: #161B22;
  --border-color: rgba(255, 255, 255, 0.08);
  --primary-color: #0E7490;
  --secondary-color: #0891B2;
  --text-primary: #F3F4F6;
  --text-secondary: #9CA3AF;
  --text-muted: #4B5563;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  background-image: radial-gradient(circle at 15% 0%, rgba(14, 116, 144, 0.18), transparent 45%),
                     radial-gradient(circle at 85% 10%, rgba(8, 145, 178, 0.12), transparent 40%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

a { color: inherit; }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.25rem 4rem 1.25rem;
}

/* ---- header ---- */
.blog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem 1.25rem;
}
.blog-header .logo-link { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.blog-header img { height: 28px; width: auto; display: block; }
.blog-header nav { display: flex; gap: 1.5rem; font-size: 0.92rem; }
.blog-header nav a { text-decoration: none; color: var(--text-secondary); transition: color 0.15s ease; }
.blog-header nav a:hover { color: var(--text-primary); }

/* ---- breadcrumb ---- */
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ---- blog index ---- */
.blog-hero { padding: 0 0 2.5rem 0; }
.blog-hero h1 { font-size: 2.1rem; font-weight: 800; margin: 0 0 0.75rem 0; letter-spacing: -0.02em; }
.blog-hero p { color: var(--text-secondary); font-size: 1.05rem; max-width: 620px; margin: 0; }

.post-list { display: flex; flex-direction: column; gap: 1rem; }
.post-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem 1.75rem;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.post-card:hover { border-color: var(--primary-color); background: var(--bg-card-hover); transform: translateY(-1px); }
.post-card .meta { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 0.5rem; }
.post-card h2 { font-size: 1.25rem; font-weight: 700; margin: 0 0 0.5rem 0; color: var(--text-primary); }
.post-card p { color: var(--text-secondary); font-size: 0.95rem; margin: 0; }
.post-card .read-more { display: inline-block; margin-top: 0.85rem; color: var(--secondary-color); font-size: 0.88rem; font-weight: 600; }

/* ---- article ---- */
article.post h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; margin: 0 0 0.75rem 0; }
.post-meta { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 2rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }
.post-body { font-size: 1.05rem; color: #E5E7EB; }
.post-body p { margin: 0 0 1.25rem 0; }
.post-body h2 { font-size: 1.45rem; font-weight: 700; margin: 2.25rem 0 1rem 0; color: var(--text-primary); letter-spacing: -0.01em; }
.post-body h3 { font-size: 1.15rem; font-weight: 700; margin: 1.75rem 0 0.75rem 0; color: var(--text-primary); }
.post-body ul { margin: 0 0 1.25rem 1.25rem; padding: 0; }
.post-body li { margin-bottom: 0.4rem; color: #E5E7EB; }
.post-body strong { color: var(--text-primary); font-weight: 700; }
.post-body em { color: var(--text-secondary); }
.post-body hr { border: none; border-top: 1px solid var(--border-color); margin: 2.5rem 0; }
.post-body a.inline-link { color: var(--secondary-color); text-decoration: underline; text-decoration-color: rgba(8,145,178,0.4); }
.post-body a.inline-link:hover { text-decoration-color: var(--secondary-color); }
.post-footnote { font-style: italic; color: var(--text-secondary); font-size: 0.95rem; }

/* ---- CTA ---- */
.cta-box {
  margin-top: 3rem;
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  text-align: center;
}
.cta-box h3 { margin: 0 0 0.5rem 0; font-size: 1.2rem; }
.cta-box p { color: var(--text-secondary); margin: 0 0 1.25rem 0; font-size: 0.95rem; }
.cta-btn {
  display: inline-block;
  background: var(--primary-color);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  transition: background 0.15s ease;
}
.cta-btn:hover { background: var(--secondary-color); }

/* ---- related / nav between posts ---- */
.post-nav { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); display: flex; flex-direction: column; gap: 0.6rem; }
.post-nav a { color: var(--text-secondary); text-decoration: none; font-size: 0.92rem; }
.post-nav a:hover { color: var(--secondary-color); }

/* ---- footer ---- */
.blog-footer {
  max-width: 860px;
  margin: 3rem auto 0 auto;
  padding: 2rem 1.25rem 1rem 1.25rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.blog-footer .links { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.blog-footer a { color: var(--text-secondary); text-decoration: none; }
.blog-footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .blog-header nav { gap: 1rem; font-size: 0.85rem; }
  .blog-hero h1 { font-size: 1.6rem; }
  article.post h1 { font-size: 1.5rem; }
}