main img {
    display: block;
    margin: 0 auto;
    max-width: 85%;
    height: auto;
    border-radius: 8px; /* Optional touch of styling */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); /* Optional touch of styling */
}

/* Smaller screenshot variant */
img.screenshot-sm {
    max-width: 52%;
    margin: 1.5rem auto;
}

/* mdbook-blame styling */
main > details:last-child {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid var(--table-border-color);
    font-size: 0.85em;
}

main > details:last-child > summary {
    cursor: pointer;
    font-style: italic;
    color: var(--sidebar-fg);
    opacity: 0.8;
    user-select: none;
    outline: none;
}

main > details:last-child > blockquote {
    margin: 15px 0 0 0;
    padding: 10px 15px;
    background-color: var(--sidebar-bg);
    border-left: 3px solid var(--table-border-color);
    border-radius: 0 4px 4px 0;
}

/* ── EOCV-Sim promo card ────────────────────────────────────── */
.promo-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
    margin: 3.5rem auto;
    padding: 3rem 2.5rem;
    background: var(--sidebar-bg);
    border: 1px solid var(--table-border-color);
    border-top: 5px solid var(--links);
    border-radius: 18px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    text-decoration: none;
    max-width: 600px;
}

.promo-icon {
    font-size: 4.5rem;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.promo-body {
    width: 100%;
}

.promo-title {
    margin: 0 0 0.6rem;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--fg);
}

.promo-desc {
    margin: 0 0 1rem;
    font-size: 1.15rem;
    opacity: 0.8;
    color: var(--fg);
    line-height: 1.5;
}

.promo-btn {
    display: inline-block;
    padding: 1.1rem 3.5rem;
    background: var(--links);
    color: #fff !important;
    font-size: 1.3rem;
    font-weight: 700;
    border-radius: 10px;
    text-decoration: none !important;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.promo-btn:hover {
    opacity: 0.92;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

@media (max-width: 600px) {
    .promo-card {
        padding: 2rem 1.5rem;
        gap: 1.2rem;
    }

    .promo-icon {
        font-size: 3.5rem;
    }

    .promo-title {
        font-size: 1.5rem;
    }

    .promo-btn {
        display: block;
        width: 100%;
        text-align: center;
        padding: 1rem 2rem;
        box-sizing: border-box;
        white-space: normal;
    }
}