/* Main Header Layout */
#mainHeader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height); /* Defined in base.css or :root */
    z-index: 1000; /* High z-index to stay on top */
    background-color: rgba(60, 60, 70, 0.85); /* Semi-transparent dark background */
    backdrop-filter: blur(10px); /* Frosted glass effect */
    -webkit-backdrop-filter: blur(10px); /* For Safari */
    border-bottom: 1px solid rgba(var(--theme-accent-primary-rgb), 0.2);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3); /* Subtle shadow */
    padding: 0 1rem; /* Horizontal padding */
}

#mainHeader::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px; /* Height of the shimmer line */
    background: linear-gradient(
        90deg,
        transparent,
        var(--header-gradient-shimmer), /* Color from base.css */
        transparent
    );
    background-size: 200% 100%;
    animation: shimmer-gradient 10s linear infinite;
}

@keyframes shimmer-gradient {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.header-content {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* Max width for header content can be set on .container if used */
}

/* Main Page Content Wrapper */
#pageContent {
    padding-top: var(--header-height); /* Space for the fixed header */
    min-height: calc(100vh - var(--header-height)); /* Ensure content area fills at least the viewport minus header */
    position: relative; /* For z-indexing context if needed */
    padding-bottom: 80px; /* Approximate space for footer */
}

/* General Section Layout */
.section {
    min-height: calc(100vh - var(--header-height) - 80px); /* Account for header and footer height */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem 1rem; /* Default padding */
    opacity: 0; /* Start hidden for fade-in */
    transform: translateY(20px); /* Start slightly lower for fade-in */
    transition: opacity 1s ease-out, transform 1s ease-out;
    position: absolute; /* For stacking sections */
    width: 100%;
    top: 0;
    left: 0;
    /* background-color: transparent; */ /* Original did not specify, relies on body or #spaceBackgroundCanvas */
}

.section.active {
    opacity: 1;
    transform: translateY(0);
    z-index: 10; /* Active section on top */
    position: relative; /* Take up space in normal flow when active */
}

.hidden-section { /* Used to hide non-active sections */
    display: none !important; /* Completely remove from layout */
    opacity: 0;
    z-index: 1; /* Lower z-index than active */
}

/* Responsive adjustments for smaller screens */
@media (max-width: 1024px) { /* Tablet and below */
    #home > .container {
        flex-direction: column; /* Stack text and earth container */
        justify-content: center;
    }
    #home .lg\:w-5\/12 { /* Text panel wrapper (Tailwind class) */
        width: 100%; /* Full width on smaller screens */
        max-width: 600px; /* Limit max width for readability */
        margin-bottom: 2rem; /* Space below text panel */
    }
    #home #earthContainerWrapper { /* Earth visualization wrapper */
        width: 80vw; /* Responsive width */
        max-width: 500px; /* Max width for the earth viz */
        height: auto; /* Maintain aspect ratio */
        aspect-ratio: 1 / 1; /* Make it square-ish */
        margin-left: auto; /* Center if full width not taken */
        margin-right: auto;
        padding-left: 0; /* Reset Tailwind padding if needed */
    }
}

@media (max-width: 768px) { /* Mobile */
    .section {
        padding: 2rem 1rem; /* Smaller padding on mobile */
        min-height: calc(100vh - var(--header-height) - 60px); /* Adjust for potentially smaller footer */
    }
    #mainHeader {
        padding: 0 0.5rem; /* Less padding for header */
    }
    .header-content {
        flex-direction: column; /* Stack logo and nav on mobile */
        justify-content: center;
        padding: 0.5rem 0;
        height: auto; /* Allow header to grow */
    }
    #mainNav {
        margin-top: 0.5rem; /* Space between logo and nav */
        display: flex;
        flex-wrap: wrap; /* Allow nav items to wrap */
        justify-content: center;
    }
    #mainNav a.nav-link {
        margin-left: 10px; /* Adjust spacing for wrapped items */
        margin-right: 10px;
    }
    #pageContent {
        /* If header height is dynamic due to wrapping, this might need JS adjustment or different strategy */
        padding-top: calc(var(--header-height) + 40px); /* Approximate increased header height */
        padding-bottom: 60px; /* Space for smaller footer */
    }
    #home #earthContainerWrapper {
        width: 90vw; /* Wider on mobile */
        max-width: 400px; /* Adjust max width for earth */
    }
}

@media (min-width: 1024px) { /* lg and up */
    #home > .container {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }
    #homeTextPanel {
        text-align: left;
        align-items: flex-start;
        flex-shrink: 0; /* Prevent the text panel from shrinking */
    }
}