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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #1a1a1a;
    min-height: 100vh;
    color: #e0e0e0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    color: #e0e0e0;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

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

.module-card {
    background: #2a2a2a;
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    color: #e0e0e0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid #3a3a3a;
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(204, 119, 34, 0.3);
    border-color: #cc7722;
}

.module-number {
    font-size: 3rem;
    font-weight: 700;
    color: #cc7722;
    opacity: 0.15;
    position: absolute;
    top: -10px;
    right: 20px;
}

.module-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #cc7722;
    position: relative;
    z-index: 1;
}

.module-card p {
    color: #b0b0b0;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

footer {
    text-align: center;
    color: #b0b0b0;
    padding: 2rem 0;
    opacity: 0.8;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

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