:root {
  --sg-primary: #1d4ed8;
  --sg-primary-light: #3b82f6;
  --sg-dark: #0f172a;
  --sg-slate: #1e293b;
  --sg-muted: #64748b;
  --sg-light: #f1f5f9;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #1e293b;
  background: #f8fafc;
}

/* Navbar */
.sg-navbar {
  background: var(--sg-dark);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.35);
}
.sg-navbar .brand {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.sg-navbar .brand span { color: var(--sg-primary-light); }
.sg-navbar a.nav-link {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.sg-navbar a.nav-link:hover { color: #fff; }

/* Hero */
.hero-section {
  background: linear-gradient(135deg, var(--sg-dark) 0%, var(--sg-slate) 100%);
  color: white;
  padding: 4.5rem 0 3.5rem;
}
.hero-section h1 {
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  font-weight: 700;
  line-height: 1.22;
  margin-bottom: 1.25rem;
}
.hero-section h1 span { color: var(--sg-primary-light); }
.hero-section .lead {
  color: rgba(255,255,255,0.82);
  font-size: 1rem;
  line-height: 1.75;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(59,130,246,0.18);
  border: 1px solid rgba(59,130,246,0.4);
  color: #93c5fd;
  padding: 0.35rem 0.9rem;
  border-radius: 2rem;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 1.4rem;
}
.hero-img {
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.hero-link { color: #93c5fd; text-decoration: none; }
.hero-link:hover { color: #bfdbfe; text-decoration: underline; }
.hero-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 1.75rem;
}
.hero-list li {
  color: rgba(255,255,255,0.82);
  font-size: 0.97rem;
  line-height: 1.6;
  padding: 0.3rem 0;
  padding-left: 1.4rem;
  position: relative;
}
.hero-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--sg-primary-light);
  font-weight: 700;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--sg-primary) 0%, var(--sg-primary-light) 100%);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  margin: 3rem 0;
  text-align: center;
  box-shadow: 0 8px 30px rgba(29,78,216,0.3);
}
.cta-banner h2 { color: white; font-size: 1.55rem; font-weight: 700; margin-bottom: 0.5rem; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 1.5rem; font-size: 1rem; }
.btn-cta {
  background: white;
  color: var(--sg-primary);
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  display: inline-block;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-cta:hover {
  color: var(--sg-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}

/* Content cards */
.section-card {
  background: white;
  border-radius: 12px;
  padding: 2.25rem 2.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  border: 1px solid #e2e8f0;
  overflow: hidden;
}
.section-card h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--sg-dark);
  margin-bottom: 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--sg-primary-light);
  display: inline-block;
}
.section-card p { color: #374151; line-height: 1.78; font-size: 0.97rem; }
.section-card ul { color: #374151; line-height: 1.78; font-size: 0.97rem; }
.section-card img { border-radius: 8px; border: none !important; box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.figure-caption { color: var(--sg-muted); font-size: 0.75rem; margin-top: 0.4rem; }

/* Link cards grid */
.link-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}
.link-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--sg-light);
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  text-decoration: none;
  color: var(--sg-dark);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.link-card:hover {
  background: var(--sg-primary);
  color: white;
  border-color: var(--sg-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(29,78,216,0.25);
}
.link-card .link-icon { font-size: 1.15rem; flex-shrink: 0; }

/* Eco highlight */
.eco-highlight {
  background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
  border-radius: 10px;
  padding: 1.5rem 1.75rem;
  margin-top: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.eco-highlight img { width: 80px; height: auto; border-radius: 6px; box-shadow: none !important; }
.eco-highlight .eco-text p { color: rgba(255,255,255,0.88) !important; margin: 0; font-size: 0.92rem; }
.eco-highlight .eco-text strong { color: white; display: block; margin-bottom: 0.4rem; font-size: 1rem; }

/* Footer */
.sg-footer {
  background: var(--sg-dark);
  padding: 2.5rem 0;
  margin-top: 4rem;
}
.sg-footer .footer-brand { color: white; font-weight: 600; font-size: 1rem; margin-bottom: 0.25rem; }
.sg-footer p { color: rgba(255,255,255,0.55); font-size: 0.86rem; margin: 0; }
.sg-footer a { color: rgba(255,255,255,0.75); text-decoration: none; }
.sg-footer a:hover { color: white; }

/* Main content spacing */
.main-content {
  padding: 2.5rem 0 1rem;
}