/* ======================
   NAVIGATION
   ====================== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: linear-gradient(90deg, rgba(18, 18, 24, 0.9), rgba(18, 18, 24, 0.7));
  border-bottom: 1px solid var(--card-border);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-links li a {
  position: relative;
  color: var(--dark-text);
  text-decoration: none;
  font-size: 1rem;
  padding: 0.5rem 0;
  transition: color 0.3s ease;
}

.nav-links li a:hover {
  color: var(--primary-color);
}

.nav-links li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-links li a:hover::after {
  width: 100%;
}

.light-theme nav {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.light-theme .nav-links li a {
  color: #1f1f1f;
}

.light-theme .nav-links li a:hover {
  color: #0f1116;
}

/* ======================
   INTRO / HERO SECTION
   ====================== */
.intro-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 20% 20%, rgba(255, 204, 0, 0.06), transparent 40%),
              radial-gradient(circle at 80% 80%, rgba(107, 225, 230, 0.05), transparent 45%),
              linear-gradient(135deg, #0c0c10, #0d0d15);
  padding: 1.5rem 1.5rem 4rem;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.6;
  mix-blend-mode: screen;
  animation: drift 16s ease-in-out infinite;
  z-index: 0;
}

.orb-1 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(255, 204, 0, 0.4), transparent 60%);
  top: 10%;
  left: 8%;
}

.orb-2 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(107, 225, 230, 0.35), transparent 60%);
  bottom: 8%;
  right: 12%;
  animation-duration: 20s;
}

.light-theme .intro-section {
  background: linear-gradient(135deg, #f7f7fb, #e9ecf4);
}

.intro-content {
  width: 100%;
  max-width: 1200px;
  margin-top: 4.5rem;
  position: relative;
  z-index: 1;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-left {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-right {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ======================
   PAGE SPACING HELPERS
   ====================== */
main {
  display: block;
  width: 100%;
}