:root {
    --errp-primary-color: #3498db;
    --errp-secondary-color: #2ecc71;
    --errp-text-color: #333;
    --errp-background: #fff;
    --errp-border-color: #e0e0e0;
    --errp-spacing: 1.5rem;
    --errp-border-radius: 4px;
    --errp-transition: all 0.3s ease;
    --errp-box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --errp-grid-item-padding: 1rem;
    --errp-grid-gap: 1.5rem;
}

.errp-posts {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--errp-text-color);
    margin: var(--errp-spacing) 0;
}

.errp-posts * {
    box-sizing: border-box;
}

.errp-headline {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: var(--errp-spacing);
    padding-bottom: 0.5em;
    border-bottom: 1px solid var(--errp-border-color);
    color: var(--errp-text-color);
}

/* List Layout */
.errp-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.errp-list-item {
    margin-bottom: var(--errp-spacing);
    padding: var(--errp-spacing);
    border: 1px solid var(--errp-border-color);
    border-radius: var(--errp-border-radius);
    transition: var(--errp-transition);
    background: var(--errp-background);
    display: flex;
    align-items: flex-start;
}

.errp-list-item:hover {
    box-shadow: var(--errp-box-shadow);
}

/* Grid Layout */
.errp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--errp-grid-gap);
}

.errp-grid-item {
    background: var(--errp-background);
    border: 1px solid var(--errp-border-color);
    border-radius: var(--errp-border-radius);
    overflow: hidden;
    transition: var(--errp-transition);
    display: flex;
    flex-direction: column;
    padding: var(--errp-grid-item-padding);
}

.errp-grid-item:hover {
    box-shadow: var(--errp-box-shadow);
}

.errp-grid-item .errp-thumbnail {
    margin: calc(-1 * var(--errp-grid-item-padding));
    margin-bottom: var(--errp-grid-item-padding);
}

.errp-grid-item .errp-content {
    flex-grow: 1;
}


/* Thumbnails */
.errp-thumbnail {
    margin-bottom: var(--errp-spacing);
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
}

.errp-list-item .errp-thumbnail {
    flex: 0 0 120px;
    margin-right: var(--errp-spacing);
    margin-bottom: 0;
}

.errp-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--errp-transition);
}

/* Typography */
.errp-title {
    font-size: 1.1em;
    margin: 0 0 0.5em 0;
    font-weight: 600;
}

.errp-title a {
    color: var(--errp-primary-color);
    text-decoration: none;
    transition: var(--errp-transition);
}

.errp-title a:hover {
    color: var(--errp-secondary-color);
}

.errp-excerpt {
    font-size: 0.9em;
    color: #666;
    margin-top: 0.5em;
}

/* No Image Placeholder */
.errp-no-image {
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
}

.errp-no-image .dashicons {
    font-size: 48px;
    color: #999;
}

.errp-no-image {
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16 / 9;
    width: 100%;
}

.errp-no-image .dashicons {
    font-size: 48px;
    width: auto;
    height: auto;
    color: #999;
}

.errp-category {
    background-color: var(--errp-primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16 / 9;
    width: 100%;
    font-weight: bold;
    text-transform: uppercase;
}

.errp-expand-content {
    display: none;
}

.errp-hide-image {
    display: none;
}

.errp-grid-item.errp-expand-content .errp-content,
.errp-list-item.errp-expand-content .errp-content {
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --errp-grid-item-padding: 0.75rem;
        --errp-grid-gap: 1rem;
    }

    .errp-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    
    .errp-list-item {
        flex-direction: column;
    }
    
    .errp-list-item .errp-thumbnail {
        flex: 0 0 auto;
        margin-right: 0;
        margin-bottom: var(--errp-spacing);
        padding-top: 56.25%;
    }
}

@media (max-width: 480px) {
    :root {
        --errp-grid-item-padding: 0.5rem;
        --errp-grid-gap: 0.75rem;
    }

    .errp-grid {
        grid-template-columns: 1fr;
    }
    
    .errp-posts {
        font-size: 14px;
    }
    
    .errp-headline {
        font-size: 1.2em;
    }
}