/*
Component: Navigation Header

Usage
    IDs
        #site-header      : Main page banner header container (flexbox layout)
        
    Classes
        .logo             : Flex container for branding text and contact info
        .logo-name        : Site title / owner name text
        .logo-divider     : Vertical divider character wrapper
        .logo-contact     : Email, phone, or external profile link anchors
        .navbar           : Main navigation container
        .nav-menu         : List container for main menu item buttons
        .nav-item         : Sub-container for a main menu button, acts as anchor for hover dropdowns
        .nav-link         : The clickable label inside a menu button
        .dropdown-menu    : Container for dropdown link options (toggled on hover)
        
    Example:
        <header id="site-header">
            <div class="logo">
                <h1 class="logo-name">John Doe</h1>
                <span class="logo-divider">|</span>
                <a href="mailto:john@example.com" class="logo-contact">john@example.com</a>
            </div>
            <nav class="navbar">
                <ul class="nav-menu">
                    <li class="nav-item">
                        <a href="#" class="nav-link">Section Name</a>
                        <div class="dropdown-menu">
                            <a href="#anchor1">Subsection 1</a>
                            <a href="#anchor2">Subsection 2</a>
                        </div>
                    </li>
                </ul>
            </nav>
        </header>
*/
#site-header {
    background-color: var(--color-banner);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between; /* Logo on left, navigation on right */
    align-items: center;
    border-bottom: 2px solid var(--color-subcontent);
}

/* Header logo and contact details container */
#site-header .logo {
    display: flex;
    align-items: center;
    flex-wrap: wrap; /* Wraps cleanly on mobile devices */
    gap: 0.75rem;    /* Spacing between text and dividers */
}

#site-header .logo-name {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-banner-text);
    font-weight: bold;
}

/* Faded divider lines to keep the design clean and uncluttered */
#site-header .logo-divider {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.45); 
}

/* Secondary font size and color for the contacts to create hierarchy */
#site-header a.logo-contact {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85); /* Premium, high-contrast off-white */
    font-weight: normal;
    text-decoration: underline;        /* Keep links underlined by default */
    transition: opacity 0.2s ease;
}

#site-header .logo-description {
    font-size: 1.25rem;
    color: var(--color-banner-text);
}

#site-header a.logo-contact:hover {
    opacity: 0.7;                     /* Subtle hover feedback without changing the color */
}

/* Horizontal list layout */
.navbar .nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.75rem; /* Gap separating the discrete boxes */
}

/* The discrete boxes with borders using interactable colors */
.navbar .nav-item {
    position: relative; /* Anchor for absolute positioning of dropdowns */
    background-color: var(--color-interactable);
    border: 1px solid var(--color-bg);
    border-radius: 0.375rem;
    transition: background-color 0.2s, border-color 0.2s;
}

.navbar .nav-item:hover {
    background-color: var(--color-interactable-hover);
    border-color: var(--color-interactable-text);
}

.navbar .nav-link {
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--color-interactable-text);
    text-decoration: none;
    font-weight: bold;
    font-size: 0.95rem;
}

/* Dropdown Menu Container */
.navbar .dropdown-menu {
    display: none; /* Hidden by default */
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.35rem; /* Gap between header box and dropdown menu */
    
    /* Dynamic width: wraps to fit its own longest item content */
    width: max-content; 
    min-width: 100%; /* Ensures it is at least as wide as the parent box */
    
    background-color: var(--color-content);
    border: 1px solid var(--color-subcontent);
    border-radius: 0.375rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
    padding: 0.5rem 0;
    z-index: 100; /* Floats above content-cards and timeline dots */
}

/* Invisible hover bridge to prevent the dropdown from disappearing over the gap */
.navbar .dropdown-menu::before {
    content: "";
    position: absolute;
    top: -0.4rem; /* Extends upward to cover the 0.35rem gap */
    left: 0;
    width: 100%;
    height: 0.4rem; /* Height of the gap */
    background-color: transparent; /* Remains completely invisible */
}

/* Show dropdown on hover */
.navbar .nav-item:hover .dropdown-menu {
    display: flex;
    flex-direction: column;
}

/* Dropdown link items */
.navbar .dropdown-menu a {
    display: block;
    padding: 0.6rem 1.25rem;
    color: var(--color-content-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s, color 0.2s;
    white-space: nowrap; /* Prevents long titles from wrapping to a new line */
}

.navbar .dropdown-menu a:hover {
    background-color: var(--color-interactable);
    color: var(--color-interactable-text);
}