:root {
    --border-color: #dedddc;
    --sidebar-background: #f7f7f7;
    --sidebar-border: 1px solid var(--border-color);
    --sidebar-link-color: #000;
    --color-gray: #999;
    --spacing: 40px;
    --shadow-color: 0deg 0% 63%;
    --shadow:
    0.3px 0.5px 0.7px hsl(var(--shadow-color) / 0.25),
    0.8px 1.6px 2px -0.8px hsl(var(--shadow-color) / 0.25),
    2.1px 4.1px 5.2px -1.7px hsl(var(--shadow-color) / 0.25),
    5px 10px 12.6px -2.5px hsl(var(--shadow-color) / 0.25);
    --transition-speed: 0.3s;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

#burger-menu {
    display: block;
    position: fixed;
    top: 15px;
    left: 20px;
    z-index: 1010;
    width: 40px;
    height: 40px;
    background: #fff;
    border: var(--sidebar-border);
    border-radius: 5px;
    cursor: pointer;
    padding: 8px;
    box-shadow: var(--shadow);
    box-sizing: border-box;
}

#burger-menu span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #333;
    margin: 5px 0;
    transition: transform var(--transition-speed) ease-in-out, opacity var(--transition-speed) ease-in-out;
    transform-origin: center center;
}

#burger-menu span:first-child { margin-top: 0; }
#burger-menu span:last-child { margin-bottom: 0; }

#burger-menu.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

#burger-menu.active span:nth-child(2) {
    opacity: 0;
}

#burger-menu.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

aside#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 80%;
    background-color: var(--sidebar-background);
    border-right: var(--sidebar-border);
    padding: var(--spacing);
    padding-top: 80px;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease-in-out;
    z-index: 1000;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 0.75);
    box-shadow: none;
}

aside#sidebar.sidebar-open {
    transform: translateX(0);
    box-shadow: 5px 0px 15px rgba(0,0,0,0.1);
}

main#content {
    padding: var(--spacing) 20px; /* Adjusted horizontal padding */
    padding-top: 80px; /* Adjusted top padding */
    display: block;
}

article#doc {
    width: 100%;
    flex-shrink: initial;
}

article#doc > * {
    margin-bottom: calc(var(--spacing)/2);
}

h1, h2, h3, h4 { font-weight: 600; }
h1 { font-size: 2rem; line-height: 1.2; }
h2 { font-size: 1.75rem; line-height: 1.25; }
h3 { font-size: 1.4rem; line-height: 1.3; }
h4 { font-size: 1.15rem; line-height: 1.35;}

ul { list-style: disc; margin: 1em 0; padding-left: 1.5rem; }
ol { list-style: decimal; margin: 1em 0; padding-left: 1.5rem; }
li { margin-bottom: 0.5em; }
b, strong { font-weight: 700; }
i, em { font-style: italic; }

.section-title {
    color: var(--color-gray);
    font-size: 0.725rem;
    display: block;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: calc(var(--spacing) * 0.25);
    user-select: none;
}

.meta-date { display: block; color: var(--color-gray); font-size: 0.825rem; }

main#content h1 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: calc(var(--spacing) * 0.725);
    margin-bottom: calc(var(--spacing) * 0.75);
}

main#content img {
    border: var(--sidebar-border);
    border-radius: 12.5px;
    box-shadow: var(--shadow);
    max-width: 100%;
    height: auto;
}

main#content figcaption {
    color: var(--color-gray);
    font-size: 0.75rem;
    margin-top: -7.5px;
    text-align: center;
}

aside#sidebar #logo a { display: flex; flex-direction: row; gap: 10px; align-items: center; user-select: none; }
aside#sidebar #logo a:hover { text-decoration: none; }
aside#sidebar #logo a:hover .site-title { text-decoration: underline; }
aside#sidebar .site-title { text-transform: uppercase; font-size: 14px; font-weight: 900; letter-spacing: -0.65px; }
aside#sidebar .site-description { display: block; color: var(--color-gray); font-size: 0.75rem; margin-top: -5px; }
aside#sidebar a { color: var(--sidebar-link-color); text-decoration: none; }
aside#sidebar a:hover { text-decoration: underline; }
aside#sidebar li.active a { font-weight: 700; }
aside#sidebar ul { padding: 0; list-style: none; }
aside#sidebar ul li { list-style: none; margin-bottom: 0.5em; }

#copyright {
    display: block;
    color: var(--color-gray);
    font-size: 0.825rem;
    border-top: 1px solid var(--border-color);
    padding-top: calc(var(--spacing) * 0.725);
    margin-top: calc(var(--spacing) * 0.75);
}

@media (min-width: 769px) {
    body {
        display: flex;
    }

    #burger-menu {
        display: none;
    }

    aside#sidebar {
        position: sticky;
        top: 0;
        left: auto;
        bottom: auto;
        width: 250px;
        max-width: none;
        height: 100vh;
        background-color: transparent;
        border-right: var(--sidebar-border);
        padding: var(--spacing);
        transform: translateX(0);
        transition: none;
        z-index: auto;
        overflow-y: auto;
        flex-shrink: 0;
        display: flex;
        flex-direction: column;
        gap: var(--spacing);
        box-shadow: none;
    }

    aside#sidebar.sidebar-open {
         transform: translateX(0);
         box-shadow: none;
    }

    main#content {
        flex-grow: 1;
        padding: var(--spacing); /* Restore original padding */
        display: flex;
        gap: var(--spacing);
    }

    article#doc {
        width: 65ch;
        flex-shrink: 0;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2.0rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
}