/* --- 1. Basic & Font Styles --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    color: #212529;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

/* --- 2. Two-Column Grid Layout --- */
.page-container {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

/* --- 3. Sticky Sidebar Navigation --- */
#sidebar-nav {
    position: sticky;
    top: 20px;
    align-self: start;
    max-height: 90vh;
    overflow-y: auto;
    border-right: 1px solid #e9ecef;
    padding-right: 20px;
}

#sidebar-nav h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #343a40;
    margin-top: 0;
    /* UPDATED: Reduced bottom margin to pull link up */
    margin-bottom: 0.5rem; 
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* UPDATED: Increased top margin to add space */
#sidebar-nav .nav-section-spacer {
    margin-top: 2rem; 
}

#sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#sidebar-nav li {
    margin-bottom: 0.5rem;
}

#sidebar-nav li.nav-separator {
    border-bottom: 1px solid #e9ecef; 
    padding-bottom: 8px; 
    margin-bottom: 8px;
}

#sidebar-nav a {
    font-size: 0.9rem;
    color: #495057;
    text-decoration: none;
    display: block;
    padding: 4px 0;
    line-height: 1.4;
    border-radius: 4px;
}

#sidebar-nav a:hover {
    color: #0056b3;
    background-color: #e6f2ff;
}

/* --- 4. Main Article Content --- */
main {
    background-color: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 20px 40px;
}

header {
    border-bottom: 2px solid #e9ecef;
    margin-bottom: 30px;
    padding-bottom: 20px;
}

h1 {
    color: #212529;
    font-size: 2.2em;
    line-height: 1.2;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.0em;
    color: #6c757d;
    font-style: italic;
    line-height: 1.5;
}

/* Style for the byline */
.byline {
    font-size: 0.9em;
    color: #6c757d;
    font-style: italic;
    margin-top: -10px;
    padding-top: 15px;
    padding-bottom: 20px;
}


h2 {
    font-size: 1.8em;
    color: #212529;
    margin-top: 40px;
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 10px;
}

h3 {
    font-size: 1.3em;
    color: #343a40;
    margin-top: 25px;
    margin-bottom: 10px;
    scroll-margin-top: 20px; 
}

p { margin-bottom: 15px; }

a {
    color: #0056b3;
    text-decoration: none;
    font-weight: 500;
}
a:hover { text-decoration: underline; }

ol {
    list-style-type: none;
    counter-reset: pillar-counter;
    padding-left: 0;
}

ol > li {
    position: relative;
    counter-increment: pillar-counter;
    margin-bottom: 30px;
    padding-left: 35px;
}

ol > li::before {
    content: counter(pillar-counter) ".";
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 1.1em;
    font-weight: bold;
    color: #495057;
}

ol > li ul {
    list-style-type: disc; 
    margin-top: -10px;
    margin-bottom: 15px;
    padding-left: 40px; 
}

ol > li ul li {
    margin-bottom: 8px;
    padding-left: 0; 
    position: static; 
}

ol > li ul li::before {
    content: none; 
}


blockquote {
    font-style: italic;
    font-size: 1.1em;
    color: #495057;
    margin: 30px 0;
    padding: 15px 20px;
    border-left: 5px solid #ced4da;
    background-color: #f8f9fa;
    border-radius: 0 5px 5px 0;
}

/* --- 5. Responsive Mobile Styles --- */
@media (max-width: 960px) {
    .page-container {
        grid-template-columns: 1fr;
        padding: 0 10px;
        margin: 10px auto;
    }

    #sidebar-nav {
        position: static;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid #e9ecef;
        padding-right: 0;
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }

    main {
        padding: 15px 20px;
    }
}
.box { box-shadow: 15px 15px 20px rgba(0, 0, 0, 0.5); width: 90%; max-width: 700px; }
.icon { box-shadow:10px 10px 15px rgba(0, 0, 0, 0.5); max-width: 250px;border-radius:10px;width:30%;float:right;}