body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: #0a0f1c;
  color: #fff;
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

.dark-mode { background: #0a0f1c; }
.light-mode { background: #f5f5f5; color: #111; }

nav.nav-bar {
  background: #3b82f6;
  padding: 40px 20px;
  border-bottom-left-radius: 60px;
  border-bottom-right-radius: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.nav-logo {
  width: 80px;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.nav-btn {
  background: white;
  color: #3b82f6;
  font-weight: bold;
  padding: 10px 18px;
  text-decoration: none;
  border-radius: 999px;
  transition: all 0.3s ease;
}

.nav-btn:hover {
  background: #e0e7ff;
  transform: scale(1.05);
}

#toggle-theme {
  background: #ffffff;
  color: #3b82f6;
  border: none;
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s ease;
}

#toggle-theme:hover {
  background: #e0e7ff;
}

.cta-button {
  background: #3b82f6;
  color: white;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  margin-top: 10px;
}

hr.section-divider {
  border: none;
  height: 3px;
  background: #3b82f6;
  margin: 12px auto 30px auto;
  width: 60%;
  border-radius: 999px;
}

.hidden { display: none; }
.fade-in { animation: fadeIn 1s ease forwards; }
.fade-in-up { animation: fadeUp 0.8s ease forwards; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

body, .nav-bar, .cta-button, .nav-btn, #toggle-theme {
  transition: background 0.5s ease, color 0.5s ease;
}

ul {
  list-style: none;
  padding-left: 0;
}

.footer {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  padding: 25px 15px;
  font-size: 0.9rem;
  text-align: center;
  margin-top: 40px;
  border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.cta-button {
  display: inline-block;
  padding: 12px 28px;
  background: var(--blue);
  color: var(--text-light);
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 20px;
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.cta-button:hover {
  background: var(--blue-dark);
  transform: scale(1.06);
}