:root {
    --bg-color: #3b3b3b;
    --text-color: #ffffff;
    --link-color:  #ff7f00;
    /* --link-hover: #10434b; */
    --border-color: #e6e4e2;
    --sidebar-width: 200px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;

    /* Force scrollbar space to be always reserved */
    overflow-y: scroll;
}

/* Responsive Layout Container */
.container {
    display: flex;
    max-width: 960px;
    width: 100%;

    /* Anchor to the left side but keep a comfortable border margin */
    margin-left: max(4rem, calc((100vw - 960px) / 2));
    margin-right: auto;

    padding: 3rem 2rem;
    gap: 3.5rem;
}

/* div.sidepanel{ */
/*     font-size: 140%; */
/* } */

div.myHeadings{
    font-size: 140%;
}

div.highlight{
    color: #87cefa;;
		font-weight: bold;
}


/* Sidebar Column */
aside {
    width: var(--sidebar-width);
    flex-shrink: 0;

    /* ─── MAKE SIDEBAR FIX IN PLACE ─── */
    position: sticky;
    top: 3rem;              /* Aligns it perfectly with the top padding of the container */
    max-height: calc(100vh - 6rem); /* Prevents sidebar from overflowing the viewport */
    overflow-y: auto;       /* Adds an internal scrollbar *only* if your menu becomes massive */
}

aside h1 {
    /* font-size: 1.4rem; */
    font-size: 180%;
    font-weight: 700;
    margin: 0 0 1.5rem 0;
    line-height: 1.2;
}

/* aside h1 a { */
/*     color: var(--text-color); */
/*     text-decoration: none; */
/* } */

aside nav ul li a {
    font-size: 110%;
}

/* Navigation Links */
nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    margin-bottom: 0.6rem;
}

nav ul li a {
    color: var(--link-color);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

nav ul li a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* Main Content Column */
main {
    flex-grow: 1;
    max-width: 680px;
}

main p {
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: justify;
}

h2 {
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
}

ul {
    padding-left: 1.2rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: var(--link-color);
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:hover {
    color: var(--link-hover);
}

/* Informative callout block */
.callout {
    /* background-color: #b3b3b3; */
    background-color: #696969;
    border-left: 4px solid var(--link-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 4px 4px 0;
}

.callout p:last-child {
    margin-bottom: 0;
}

/* Responsive Breakpoint for Mobile Screens */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        gap: 2rem;
        padding: 2rem 1.2rem;
    }
    aside {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 1.5rem;
    }
    main {
        width: 100%;
    }
}