:root {
    --black: #000000;
    --green: #00ff00;
    --yellow: #ffff00;
    --dark-gray: #1a1a1a;
    --light-gray: #333333;
    --font-primary: 'Courier New', monospace;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--black);
    color: var(--green);
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background-color: var(--dark-gray);
    border-bottom: 3px solid var(--green);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.8rem;
    color: var(--yellow);
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--green);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    transition: all 0.3s;
}

.nav-link:hover,
.nav-link.active {
    border: 1px solid var(--green);
    background-color: rgba(0, 255, 0, 0.1);
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
    border-bottom: 2px solid var(--green);
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    color: var(--yellow);
    margin-bottom: 1rem;
    text-shadow: 0 0 10px var(--green);
}

.hero p {
    font-size: 1.2rem;
    color: var(--green);
}

/* Module Grid */
.modules {
    margin: 3rem 0;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.module-card {
    background-color: var(--light-gray);
    border: 2px solid var(--green);
    padding: 2rem;
    transition: all 0.3s;
}

.module-card:hover {
    border-color: var(--yellow);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
    transform: translateY(-5px);
}

.module-card h3 {
    color: var(--yellow);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.module-card p {
    color: var(--green);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--green);
    color: var(--black);
    border: none;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    font-family: var(--font-primary);
}

.btn-primary:hover {
    background-color: var(--yellow);
    transform: scale(1.05);
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background-color: transparent;
    color: var(--green);
    border: 2px solid var(--green);
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
    font-family: var(--font-primary);
}

.btn-secondary:hover {
    background-color: var(--green);
    color: var(--black);
}

/* Info Section */
.info {
    background-color: var(--light-gray);
    border: 2px solid var(--yellow);
    padding: 2rem;
    margin-top: 3rem;
}

.info h2 {
    color: var(--yellow);
    margin-bottom: 1.5rem;
}

.info ol {
    margin-left: 2rem;
    color: var(--green);
}

.info li {
    margin-bottom: 1rem;
}

.info strong {
    color: var(--yellow);
}

.highlight {
    color: var(--yellow);
    font-weight: bold;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(255, 255, 0, 0.1);
}

/* Footer */
footer {
    background-color: var(--dark-gray);
    border-top: 2px solid var(--green);
    padding: 2rem;
    text-align: center;
    color: var(--green);
    margin-top: 3rem;
}

/* Input Elements */
input, textarea, select {
    background-color: var(--light-gray);
    color: var(--green);
    border: 1px solid var(--green);
    padding: 0.75rem;
    font-family: var(--font-primary);
    margin-bottom: 1rem;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--yellow);
    box-shadow: 0 0 10px rgba(255, 255, 0, 0.3);
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

th {
    background-color: var(--light-gray);
    color: var(--yellow);
    padding: 1rem;
    border: 1px solid var(--green);
    text-align: left;
}

td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--green);
    color: var(--green);
}

tr:hover {
    background-color: rgba(0, 255, 0, 0.1);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-yellow {
    color: var(--yellow);
}

.text-green {
    color: var(--green);
}

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

.p-2 {
    padding: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .module-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 1rem;
    }
}