:root {
  --blue-light: #7EC8E3;
  --blue-mid:   #4A90C2;
  --blue-deep:  #0B3B6F;
  --ink:        #1a1a1a;
  --muted:      #3a3a3a;
  --surface:    #f5f9fc;
  --border:     #e1ebf3;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
}
.hero-wrap {
  background: #0B3B6F url("../hero-banner.jpg") center center / cover no-repeat;
  min-height: 180px;
  display: flex;
  align-items: center;
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}
.hero-title {
  color: #fff;
  font-family: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin: 0 0 0.2rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.35);
}
.hero-sub {
  color: #000;
  font-family: "Orbitron", "Share Tech Mono", "Courier New", monospace;
  font-size: 1.9rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1.1;
  margin: 0.6rem 0 0;
  text-shadow:
    0 0 6px rgba(120, 255, 160, 0.35),
    0 0 14px rgba(0, 255, 120, 0.18),
    0 1px 0 rgba(255, 255, 255, 0.3);
}
@media (max-width: 600px) {
  .hero-sub { font-size: 1.2rem; letter-spacing: 1px; }
}
.topnav {
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topnav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
}
.topnav a {
  color: var(--ink);
  text-decoration: none;
  padding: 1rem 1.1rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-right: 1px solid var(--border);
}
.topnav a:first-child { border-left: 1px solid var(--border); }
.topnav a:hover { background: var(--blue-light); color: var(--blue-deep); }

article {
  max-width: 780px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
article h1 {
  color: var(--blue-deep);
  font-size: 2rem;
  margin: 0 0 0.3rem;
  line-height: 1.3;
}
article .meta {
  color: #777;
  font-size: 0.9rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
article h2 {
  color: var(--blue-deep);
  font-size: 1.3rem;
  margin: 2rem 0 0.6rem;
}
article p, article li { color: var(--muted); }
article blockquote {
  border-left: 4px solid var(--blue-light);
  margin: 1.3rem 0;
  padding: 0.2rem 1rem;
  background: var(--surface);
  font-style: italic;
  color: var(--ink);
}
article ul, article ol { padding-left: 1.4rem; }
article li { margin-bottom: 0.4rem; }
.back {
  display: inline-block;
  margin-top: 2rem;
  color: var(--blue-mid);
  text-decoration: none;
  font-weight: 600;
}
.back:hover { color: var(--blue-deep); text-decoration: underline; }
footer {
  text-align: center;
  padding: 1.5rem;
  color: #777;
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}
@media (max-width: 680px) {
  .topnav a { padding: 0.8rem 0.7rem; font-size: 0.85rem; }
  .hero-title { font-size: 1.4rem; }
  article h1 { font-size: 1.5rem; }
}