:root {
    --sidebar-width: 300px;
    --color-bg: #0b0b0b;
    --color-text: #66ff66;
    --color-nav-bg: #121212;
    --color-nav-text: #99ff99;
    --color-nav-hover: #262626;
    --color-nav-hover-radio: #264926;
    --color-nav-unchecked: #1b331b;
    --color-nav-border: #3a663a;
    --color-heading-primary: #7fff7f;
    --color-heading-secondary: #4caf50;
    --color-border: #336633;
    --color-table-border: #264926;
    --color-thead-bg: #1b1b1b;
    --color-row-hover: #2f2f2f;
    --color-table-bg: #0b0b0b;
}

@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #f4f4f4;
        --color-text: #004d00;
        --color-nav-bg: #d9d9d9;
        --color-nav-text: #004d00;
        --color-nav-hover: #a3a3a3;
        --color-nav-hover-radio: #a3d8a3;
        --color-nav-unchecked: #cce6cc;
        --color-nav-border: #70b370;
        --color-heading-primary: #2e7d32;
        --color-heading-secondary: #1b5e20;
        --color-border: #70b370;
        --color-table-border: #a3d8a3;
        --color-thead-bg: #e6e6e6;
        --color-row-hover: #d0d0d0;
        --color-table-bg: #f4f4f4;
    }
}

body {
    margin: 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--color-bg);
    color: var(--color-text);
}

.sidebar-nav {
    background-color: var(--color-nav-bg);
    color: var(--color-nav-text);
    width: var(--sidebar-width);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-nav__links {
    list-style-type: none;
    padding: 0;
}

.sidebar-nav__links li a {
    display: block;
    color: var(--color-nav-text);
    text-decoration: none;
    padding: 0.5rem 0.25rem;
    transition: background-color 0.2s;
}

.sidebar-nav__links li a:hover {
    background-color: var(--color-nav-hover);
}

.sidebar-nav__mode-toggle {
    display: flex;
    width: 100%;
    margin-bottom: 1rem;
}

.sidebar-nav__mode-toggle input[type="radio"] {
    display: none;
}

.sidebar-nav__mode-toggle label {
    flex: 1;
    padding: 0.75rem;
    text-align: center;
    background-color: var(--color-nav-unchecked);
    color: var(--color-nav-text);
    cursor: pointer;
}

.sidebar-nav__mode-toggle label:hover,
.sidebar-nav__mode-toggle label:focus {
    background-color: var(--color-nav-hover-radio);
}

.sidebar-nav__mode-toggle input[type="radio"]:checked+label {
    background-color: var(--color-nav-bg);
    color: var(--color-nav-text);
}

.content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    padding-bottom: 6rem;
    /* Extra space at bottom to prevent back-to-top button overlap */
}

.content h1 {
    color: var(--color-heading-primary);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.content h2 {
    color: var(--color-heading-secondary);
    margin-top: 2rem;
}

.content table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background-color: var(--color-table-bg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.content caption {
    caption-side: bottom;
    padding-top: 0.5rem;
    font-style: italic;
    color: var(--color-heading-secondary);
    text-align: center;
}

.content th,
.content td {
    border: 1px solid var(--color-table-border);
    padding: 0.75rem;
    text-align: center;
}

.content th:first-child,
.content td:first-child {
    text-align: left;
}

.content thead {
    background-color: var(--color-thead-bg);
}

.content tbody tr:hover {
    background-color: var(--color-row-hover);
}

.content tbody .align-center {
    text-align: center;
}

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--color-nav-bg);
    color: var(--color-nav-text);
    border: 2px solid var(--color-nav-border);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.back-to-top:hover {
    background-color: var(--color-nav-hover);
    transform: translateY(15px) scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:active {
    transform: translateY(0) scale(0.95);
}