/* Container grids */
#machine-manager-container .machine-grid,
#machine-manager-container .machine-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

/* Tiles */
#machine-manager-container .machine-tile,
#machine-manager-container .machine-category-tile {
    border: 1px solid #ddd;
    overflow: hidden;
    background: #fff;
    transition: box-shadow 0.3s ease;
}

/* Make the link fill tile and allow overlay positioning */
#machine-manager-container .machine-tile a,
#machine-manager-container .machine-category-tile a {
    display: block;
    position: relative; /* for overlay */
    text-decoration: none;
    color: inherit;
    height: 100%;
}

/* Hover effect */
#machine-manager-container .machine-tile:hover,
#machine-manager-container .machine-category-tile:hover {
    box-shadow: 0 6px 18px rgba(0,0,0,0.1);
}

/* 8x8 square image (1:1) */
#machine-manager-container .machine-tile img,
#machine-manager-container .machine-category-tile img {
    width: 100%;
    aspect-ratio: 1 / 1;  /* perfect square */
    object-fit: cover;     /* crop nicely */
    display: block;
    background: #f7f7f7;
}

/* Title overlay: floating at bottom, centered text */
#machine-manager-container .machine-tile h3,
#machine-manager-container .machine-category-tile h3 {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    margin: 0;                  /* remove default margins */
    padding: 10px 12px;
    text-align: center;         /* centered text */
    font-size: 16px;
    line-height: 1.3;
    color: #fff;
    background: rgba(0,0,0,0.5);
    /* slight shadow for readability */
    text-shadow: 0 1px 2px rgba(0,0,0,0.35);
}

/* Loading/error helpers (optional) */
#machine-manager-container.is-loading {
    opacity: 0.6;
    pointer-events: none;
}
#machine-manager-container .machine-manager-error {
    color: #b32d2e;
    margin-top: 10px;
}

/* Larger tiles on wider screens */
@media (min-width: 768px) {
    #machine-manager-container .machine-grid,
    #machine-manager-container .machine-category-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

/* Toolbar layout: left back arrow, centered root icon */
/* Toolbar: left back, center breadcrumb, right root (grip) */
#machine-manager-container .mm-toolbar {
    display: grid;
    grid-template-columns: 40px 1fr 40px; /* back | breadcrumb | root */
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    padding-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

/* Buttons */
#machine-manager-container .mm-toolbar .mm-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid #ddd;
    background: #fff;
    color: #333;
    border-radius: 8px;
    text-decoration: none;
    transition: box-shadow 0.2s ease, background 0.2s ease;
}
#machine-manager-container .mm-toolbar .mm-btn i {
    font-size: 20px;
    line-height: 1;
}
#machine-manager-container .mm-toolbar .mm-btn:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

/* Disabled back on root */
#machine-manager-container .mm-toolbar .mm-back.mm-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-style: dashed;
}

/* Root button on far right */
#machine-manager-container .mm-toolbar .mm-root {
    grid-column: 3 / 4;
    justify-self: end;
}

/* Breadcrumb single-line, centered */
#machine-manager-container .mm-breadcrumbs {
    grid-column: 2 / 3;
    justify-self: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    font-size: 12px;
    color: #555;
}
#machine-manager-container .mm-breadcrumbs a {
    color: #0073aa;
    text-decoration: none;
}
#machine-manager-container .mm-breadcrumbs a:hover {
    text-decoration: underline;
}
#machine-manager-container .mm-bc-sep {
    color: #999;
}

/* SR-only helper */
#machine-manager-container .screen-reader-text {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}