:root {
    --bg: #f4f4f0;
    --fg: #000000;
    --accent: #ff0000;
    --border: 4px solid var(--fg);
    --border-thick: 6px solid var(--fg);
}

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: 'Courier New', Courier, monospace;
    line-height: 1.5;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    border: var(--border);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--fg);
    color: var(--bg);
}

.logo {
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: 2px;
}

.time {
    font-size: 0.9rem;
    letter-spacing: 1px;
}

nav {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

nav a {
    color: var(--fg);
    text-decoration: none;
    border: var(--border);
    padding: 0.75rem 1.5rem;
    text-transform: uppercase;
    font-weight: bold;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: background 0.1s, color 0.1s;
}

nav a:hover,
nav a.active {
    background: var(--fg);
    color: var(--bg);
}

main {
    border: var(--border-thick);
    padding: 3rem;
    flex: 1;
    margin-bottom: 2rem;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    text-transform: uppercase;
    border-bottom: var(--border);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    letter-spacing: -2px;
    line-height: 1;
}

h2 {
    font-size: 1.8rem;
    text-transform: uppercase;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    background: var(--fg);
    color: var(--bg);
    padding: 0.5rem 1rem;
    display: inline-block;
}

p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    max-width: 70ch;
}

ul {
    list-style: none;
    margin-bottom: 2rem;
}

li {
    border-bottom: 2px solid var(--fg);
    padding: 1rem 0;
    font-size: 1.1rem;
}

li::before {
    content: "> ";
    font-weight: bold;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    border: var(--border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.card h3 {
    font-size: 1.4rem;
    text-transform: uppercase;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--fg);
    padding-bottom: 0.5rem;
}

.card p {
    font-size: 1rem;
    flex: 1;
}

.error-page {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
}

.error-page h1 {
    border-bottom: none;
    color: var(--accent);
}

.btn {
    display: inline-block;
    border: var(--border);
    padding: 1rem 2rem;
    text-decoration: none;
    color: var(--fg);
    text-transform: uppercase;
    font-weight: bold;
    margin-top: 2rem;
    font-size: 1.1rem;
}

.btn:hover {
    background: var(--fg);
    color: var(--bg);
}

footer {
    border: var(--border);
    padding: 1rem;
    text-align: center;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

@media (max-width: 600px) {
    body {
        padding: 1rem;
    }
    main {
        padding: 1.5rem;
    }
    nav {
        flex-direction: column;
    }
    nav a {
        text-align: center;
    }
}