body {
    font-family: Arial, sans-serif;
    background-color: #0f0f0f;
    color: #e0e0e0;
    margin: 0;
    padding: 2rem;
}

h1 {
    color: #00e676;
}

.progress {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.module {
    border: 1px solid #444;
    border-radius: 10px;
    padding: 1rem;
    background-color: #1e1e1e;
}

.solved {
    color: #00e676;
}

.in_progress {
    color: #0080FF;
}

.unsolved {
    color: #ff5252;
}

footer {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #888;
}

section {
    margin-bottom: 2rem;
}

details {
    background-color: #171717;
    border: 1px solid #333;
    border-radius: 10px;
    padding: 1rem;
    cursor: pointer;
}

details[open] > summary.htb-section {
    margin-bottom: 1em;
}

summary {
    color: #00e676;
    font-size: 1.1rem;
}

summary:hover {
    color: #00ff88;
}