:root {
  --navy: #0b1929;
  --blue: #1a5ea8;
  --blue2: #2d7dd2;
  --text: #2c3e50;
  --text-light: #6b7280;
  --warm-white: #faf9f7;
  --font-display: "Playfair Display", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --hero-image: none;
  --badge-color: var(--blue);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--warm-white);
  line-height: 1.6;
}

a {
  color: inherit;
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 15px 24px;
  background: #ffffff;
  border-bottom: 1px solid rgba(11,25,41,0.08);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--navy);
  text-decoration: none;
  font-weight: 700;
}

.nav-logo img {
  height: 88px;
  width: auto;
}

.nav-logo span {
  font-size: 1.4rem;
}

.nav-back {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-back:hover {
  color: var(--blue);
}

.article-hero {
  position: relative;
  overflow: hidden;
  padding: 100px 24px;
  background: var(--navy);
  color: white;
  text-align: center;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--hero-image) center/cover;
  opacity: 0.2;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.cat-badge {
  display: inline-block;
  padding: 5px 15px;
  border-radius: 999px;
  background: var(--badge-color);
  color: white;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

h1 {
  margin: 20px 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
}

.meta {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.article-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: -60px auto 100px;
  padding: 0 24px;
}

.article-main {
  padding: 60px;
  border-radius: 24px;
  background: white;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.article-content h2 {
  margin: 40px 0 20px;
  padding-left: 15px;
  border-left: 4px solid var(--blue);
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--navy);
}

.article-content p {
  margin-bottom: 20px;
  font-size: 17px;
  color: #444;
}

.article-content ul {
  margin-bottom: 30px;
  padding-left: 20px;
}

.article-content li {
  margin-bottom: 12px;
  font-size: 16px;
}

.sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}

.cta-box {
  padding: 40px;
  border-radius: 20px;
  background: var(--navy);
  color: white;
  text-align: center;
}

.cta-box h3 {
  margin: 0 0 15px;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.btn-primary {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  border-radius: 10px;
  background: var(--blue);
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background: var(--blue2);
  transform: translateY(-2px);
}

footer {
  padding: 40px 24px;
  background: var(--navy);
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  font-size: 13px;
}

@media (max-width: 900px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-logo img {
    height: 64px;
  }

  .article-container {
    grid-template-columns: 1fr;
    margin-top: 20px;
  }

  .article-main {
    padding: 30px;
  }
}