:root {
    --blog-link: #007bff;
    --blog-link-hover: antiquewhite;
    --blog-border: #007bff;
    --blog-spacing-xs: 0.25rem;
    --blog-spacing-sm: 0.5rem;
    --blog-spacing-md: 1rem;
    --blog-spacing-lg: 1.5rem;
}

.blog-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--blog-spacing-xs);
    font-style: italic;
}

.blog-author,
.blog-date {
    font-family: 'Roboto', sans-serif;
    font-size: clamp(0.7rem, 2vw, 0.875rem);
    margin: 0;
}

.back-to-index {
    color: var(--blog-link);
    padding: var(--blog-spacing-sm);
    border: 2px solid var(--blog-border);
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.back-to-index:hover,
.back-to-index:focus {
    color: var(--blog-link-hover);
    border: 2px solid var(--blog-link-hover);
    background: var(--blog-link);
    text-decoration: none;
}

.back-to-index:focus {
    outline: 2px solid var(--blog-link-hover);
    outline-offset: 2px;
}

/* Mobile-first responsive design */
.instruction-card {
    width: 100%;
    margin: var(--blog-spacing-md) 0;
    padding: var(--blog-spacing-sm);
    transition: transform 0.3s ease;
}

.instruction-card:hover {
    transform: translateY(-2px);
}

.instruction-card img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

/* Standardized responsive breakpoints */
@media screen and (min-width: 576px) {
    /* sm - small devices */
    .instruction-card {
        padding: var(--blog-spacing-md);
    }
}

@media screen and (min-width: 768px) {
    /* md - medium devices */
    .instruction-card {
        width: 75%;
        margin-left: auto;
        margin-right: auto;
    }
}

@media screen and (min-width: 992px) {
    /* lg - large devices */
    .instruction-card {
        width: 60%;
        margin-left: auto;
        margin-right: auto;
        padding: var(--blog-spacing-lg);
    }
    
    .content-image {
        max-height: 350px;
        min-height: 250px;
        object-fit: cover;
    }
}

@media screen and (min-width: 1200px) {
    /* xl - extra large devices */
    .instruction-card {
        width: 50%;
        max-width: 800px;
    }
    
    .content-image {
        max-height: 400px;
    }
}