/* Navigation */
header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 5%;
  box-sizing: border-box;
  z-index: 100;
  pointer-events: none; /* Let clicks pass through except on links */
}

.brand-logo {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: 0.1em;
  pointer-events: auto;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  pointer-events: auto;
}

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 1.1rem;
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-speed);
}

.nav-link:hover {
  opacity: 0.8;
}

/* Hero Section - Split Layout */
.hero {
  position: relative;
  height: 100vh;
  width: 100vw;
  display: flex;
  overflow: hidden;
}

.hero-half {
  flex: 1;
  height: 100%;
  position: relative;
  background-size: cover;
  background-position: center;
}

/* Day Side (Left) */
.hero-day {
  /* We will use a gradient to simulate the warm mountain until the user adds an image */
  background: linear-gradient(to bottom, var(--day-bg-light), var(--day-bg-main), var(--day-bg-dark));
}

.hero-day::after {
  content: '';
  position: absolute;
  top:0; left:0; width:100%; height:100%;
  background: radial-gradient(circle at top center, rgba(255,255,255,0.2) 0%, transparent 60%);
}

/* Night Side (Right) */
.hero-night {
  /* We will use a gradient to simulate the cool night mountain */
  background: linear-gradient(to bottom, var(--night-bg-light), var(--night-bg-main), var(--night-bg-dark));
}

.hero-night::after {
  content: '';
  position: absolute;
  top:0; left:0; width:100%; height:100%;
  /* Simulating stars/moon glow */
  background: radial-gradient(circle at top center, rgba(255,255,255,0.1) 0%, transparent 40%);
}

/* Overlay Text in Center */
.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 10;
  width: 90%;
  max-width: 800px;
  pointer-events: none;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 300;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

/* Mobile responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none; /* In a real app we'd add a hamburger menu */
  }
  
  .hero {
    flex-direction: column;
  }
}