:root {
    --bg-color: #fdf6e3;
    /* Solarized Base3 */
    --text-color: #073642;
    /* Solarized Base02 */
    --accent-color: #268bd2;
    /* Solarized Blue */
    --tech-color: #2aa198;
    /* Solarized Cyan */
    --border-color: #073642;
    --card-bg: #eee8d5;
    /* Solarized Base2 */
    --font-stack: 'Fira Code', 'Courier Prime', monospace;
    --shadow-color: #586e75;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    background-image:
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: -1px -1px;
    color: var(--text-color);
    font-family: var(--font-stack);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Overlay to fade the grid pattern */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(253, 246, 227, 0.92);
    /* High opacity base color */
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1000px;
    /* Bit tighter for reading */
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    padding: 60px 0;
    text-align: left;
    border-bottom: 4px solid var(--border-color);
    margin-bottom: 60px;
    background: var(--bg-color);
    border: 4px solid var(--border-color);
    box-shadow: 8px 8px 0 var(--shadow-color);
    margin-top: 40px;
    padding: 30px;
}

.logo-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: -2px;
}

.prompt {
    color: var(--accent-color);
    margin-right: 15px;
    font-weight: bold;
}

.cursor {
    display: inline-block;
    width: 15px;
    height: 30px;
    background-color: var(--text-color);
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.subtitle {
    color: var(--shadow-color);
    font-size: 1.2rem;
    margin-top: 10px;
    border-top: 2px dashed var(--border-color);
    padding-top: 10px;
    display: inline-block;
}

/* Intro Section */
.intro-section {
    background: var(--card-bg);
    border: 4px solid var(--border-color);
    padding: 30px;
    margin-bottom: 50px;
    box-shadow: 8px 8px 0 var(--shadow-color);
}

.intro-section h2 {
    color: var(--accent-color);
    margin-bottom: 15px;
    text-transform: uppercase;
    font-size: 1.2rem;
}

/* Breadcrumbs */
.breadcrumbs {
    font-size: 0.9rem;
    color: var(--shadow-color);
    margin-top: 10px;
}

.breadcrumbs a {
    color: var(--shadow-color);
    text-decoration: none;
    border-bottom: 1px dotted var(--shadow-color);
}

.breadcrumbs a:hover {
    color: var(--accent-color);
    border-bottom-style: solid;
}

/* Category Sections */
.category-section {
    margin-bottom: 60px;
}

.category-title {
    font-size: 1.8rem;
    color: var(--accent-color);
    margin-bottom: 30px;
    border-bottom: 4px solid var(--border-color);
    display: inline-block;
    padding-right: 20px;
    background: var(--card-bg);
    padding: 10px;
    box-shadow: 4px 4px 0 var(--shadow-color);
}

/* Main Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 40px;
    padding-bottom: 60px;
}

.card {
    background: #fff;
    border: 4px solid var(--border-color);
    padding: 25px;
    text-decoration: none;
    color: inherit;
    transition: all 0.1s ease;
    /* Snappy transition */
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    box-shadow: 6px 6px 0 var(--shadow-color);
}

.card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 10px 10px 0 var(--accent-color);
}

.card:active {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0 var(--shadow-color);
}

.card .icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    border: 2px solid var(--border-color);
    padding: 10px;
    background: var(--card-bg);
    border-radius: 50%;
    /* Still keep circle for icons */
}

.card h2 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--text-color);
    font-weight: 700;
}

.card p {
    color: var(--shadow-color);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Footer */
footer {
    margin-top: auto;
    background-color: var(--border-color);
    /* Inverted footer */
    color: var(--bg-color);
    padding: 30px 0;
    border-top: 4px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 0.9rem;
}

.partner img {
    height: 40px;
    filter: grayscale(100%) invert(1);
    /* Invert logo for dark footer */
    opacity: 0.8;
}

.partner a:hover img {
    opacity: 1;
}

/* Term Entry Styles */
.term-entry {
    background: #fff;
    border: 4px solid var(--border-color);
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 12px 12px 0 var(--shadow-color);
}

.term-entry h1 {
    color: var(--accent-color);
    margin-bottom: 30px;
    border-bottom: 4px solid var(--border-color);
    padding-bottom: 10px;
    display: block;
    font-size: 2.2rem;
}

.term-entry p {
    margin-bottom: 25px;
    font-size: 1.1rem;
    text-align: justify;
}

.nerd-fact {
    background-color: var(--card-bg);
    border: 2px dashed var(--accent-color);
    padding: 20px;
    margin-top: 40px;
    color: var(--text-color);
    font-size: 0.95rem;
    position: relative;
    box-shadow: 4px 4px 0 var(--accent-color);
}

.nerd-fact::before {
    content: "🤓";
    position: absolute;
    top: -15px;
    left: 20px;
    font-size: 2rem;
    background: var(--bg-color);
    padding: 0 5px;
}

@media (max-width: 600px) {
    .container {
        padding: 0 15px;
    }

    header {
        margin-top: 20px;
        padding: 20px;
    }

    .grid {
        gap: 30px;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* TOC / Quick Nav */
.toc-nav {
    background: var(--card-bg);
    border: 4px solid var(--border-color);
    padding: 20px;
    margin-bottom: 50px;
    box-shadow: 8px 8px 0 var(--shadow-color);
}

.toc-nav h2 {
    font-size: 1.2rem;
    color: var(--accent-color);
    text-transform: uppercase;
    margin-bottom: 15px;
    border-bottom: 2px dashed var(--border-color);
    padding-bottom: 5px;
}

.toc-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
}

.toc-list li a {
    text-decoration: none;
    color: var(--text-color);
    background: #fff;
    border: 2px solid var(--border-color);
    padding: 5px 10px;
    font-size: 0.9rem;
    display: inline-block;
    transition: all 0.1s;
    box-shadow: 2px 2px 0 var(--shadow-color);
}

.toc-list li a:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0 var(--accent-color);
}

/* Collapsible Categories */
details {
    margin-bottom: 40px;
    background: var(--card-bg);
    border: 4px solid var(--border-color);
    box-shadow: 8px 8px 0 var(--shadow-color);
}

summary {
    cursor: pointer;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    padding: 15px 20px;
    list-style: none;
    /* Remove default triangle */
    background: #fff;
    border-bottom: 4px solid var(--border-color);
    position: relative;
    user-select: none;
}

summary::-webkit-details-marker {
    display: none;
}

summary::before {
    content: "[+]";
    display: inline-block;
    width: 40px;
    color: var(--text-color);
}

details[open] summary::before {
    content: "[-]";
}

details[open] summary {
    margin-bottom: 20px;
}

/* Override category section margin inside details */
details .category-section {
    margin-bottom: 0;
    padding: 20px;
}

details .category-title {
    display: none;
    /* Hide the old title inside as we use summary */
}

/* Adjust grid padding inside details */
details .grid {
    padding-bottom: 0;
}