:root {
    --gold: #FFD700;
    --dark-gold: #D4AF37;
    --black: #000;
    --dark-gray: #121212;
}

body {
    background-color: var(--black);
    color: var(--gold);
    font-family: 'Rajdhani', sans-serif;
}

.bg-gold {
    background-color: var(--gold) !important;
    color: var(--black) !important;
}

.matrix-card {
    border: 2px solid var(--gold);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
}

.matrix-position {
    width: 40px;
    height: 40px;
    border: 1px solid var(--dark-gold);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 5px;
    font-size: 0.7rem;
    background-color: var(--dark-gray);
}

.matrix-position.filled {
    background-color: var(--gold);
    color: var(--black);
    font-weight: bold;
}

.upgrade-btn {
    background-color: var(--dark-gold);
    border-color: var(--gold);
    color: white;
    font-weight: bold;
}

/* Responsive Matrix */
@media (max-width: 768px) {
    .matrix-position {
        width: 30px;
        height: 30px;
        font-size: 0.6rem;
    }
}