/* U4 Ausrüstung – storefront in the design language of the theme
   (Roboto, white cards with soft shadow, green #009540 accents, like the Etappen cards) */

.u4a {
    --u4a-green: #009540;
    --u4a-green-button: #007a33;     /* WCAG AA with white text */
    --u4a-green-dark: #005a27;
    --u4a-text: #1f2937;
    --u4a-muted: #4b5563;
    --u4a-line: #e5e7eb;
    max-width: 1100px;
    margin: 0 auto 2rem;
    color: var(--u4a-text);
    font-family: 'Roboto', sans-serif;
}
.u4a * {
    box-sizing: border-box;
}
.u4a .screen-reader-text {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* --- area tabs --- */
.u4a-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin: 0 0 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--u4a-line);
}
.u4a-tab {
    padding: 0.65rem 1.5rem;
    border: 2px solid var(--u4a-green-button);
    border-radius: 0.375rem;
    background: #fff;
    color: var(--u4a-green-button) !important;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    text-decoration: none !important;
    transition: background-color 0.2s, color 0.2s;
}
.u4a-tab:hover {
    background: #ecfdf3;
}
.u4a-tab.is-active {
    background: var(--u4a-green-button);
    color: #fff !important;
}
.u4a-tab:focus-visible,
.u4a-chips a:focus-visible,
.u4a-button:focus-visible {
    outline: 3px solid var(--u4a-green-dark);
    outline-offset: 2px;
}

/* with JavaScript only the active area is shown; without, all are listed */
.u4a.is-tabbed .u4a-section[hidden] {
    display: none;
}

/* --- category filter chips --- */
.u4a-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem;
    margin: 0 0 1.5rem;
}
.u4a-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0;
    padding: 0.4rem 0.85rem;
    background: #f3f4f6;
    border: 1px solid transparent;
    border-radius: 999px;
    color: var(--u4a-text);
    font: inherit;
    font-size: 0.85rem;
    line-height: 1.3;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    transition: background-color 0.2s, border-color 0.2s;
}
.u4a-chip:hover {
    background: #e5e7eb;
}
.u4a-chip i {
    color: var(--u4a-green);
}
.u4a-chip.is-active {
    background: #ecfdf3;
    border-color: var(--u4a-green-button);
    color: var(--u4a-green-dark);
    font-weight: 700;
}
.u4a-chip:focus-visible {
    outline: 3px solid var(--u4a-green-dark);
    outline-offset: 2px;
}
.u4a-category-intro {
    max-width: 760px;
    margin: -0.5rem auto 1.5rem;
    text-align: center;
    color: var(--u4a-muted);
}
.u4a-category-intro[hidden],
.u4a-card[hidden] {
    display: none;
}

/* --- product grid --- */
.u4a-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.25rem;
}
/* --- product card, like .route-card --- */
.u4a-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--u4a-line);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.u4a-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}
.u4a-card-media {
    text-decoration: none !important;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
    padding: 1rem;
    background: #fff;
    border-bottom: 1px solid #f3f4f6;
}
.u4a-card-media img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}
/* placeholder while a product has no image; the wrapper keeps the theme's .fas rules out */
.u4a .u4a-card-media .u4a-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #f9fafb, #e5e7eb);
    border-radius: 0.375rem;
}
.u4a .u4a-card-media .u4a-placeholder i {
    display: block;
    width: auto;
    height: auto;
    margin: 0;
    font-size: 3.5rem;
    line-height: 1;
    color: #d1d5db;
}
.u4a-card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 0.4rem;
    padding: 1rem 1.25rem 1.25rem;
}
.u4a-card-category {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #6b7280;
}
.u4a-card-category i {
    color: var(--u4a-green);
    margin-right: 0.15rem;
}
.u4a-badge {
    align-self: flex-start;
    padding: 0.15rem 0.6rem;
    background: #ecfdf3;
    border-radius: 999px;
    color: var(--u4a-green-dark);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.u4a-card-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--u4a-text);
}
.u4a-card-subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: var(--u4a-muted);
}
.u4a-card-text {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--u4a-muted);
}
.u4a-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: auto;
    padding: 0.65rem 1rem;
    background: var(--u4a-green-button);
    border-radius: 0.375rem;
    color: #fff !important;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    text-decoration: none !important;
    transition: background-color 0.2s;
}
/* buttons line up at the bottom of each row; the spacer keeps a minimum gap above them */
.u4a-card-body::after {
    content: '';
    order: 9;
    flex: 1 0 0.5rem;
}
.u4a-card-body > .u4a-button {
    order: 10;
    margin-top: 0;
}
.u4a-button:hover {
    background: var(--u4a-green-dark);
}
.u4a-button i {
    font-size: 0.75rem;
}

/* --- affiliate notice --- */
.u4a-disclosure {
    margin: 1rem 0 0;
    padding: 0.75rem 1rem;
    background: #f9fafb;
    border: 1px solid var(--u4a-line);
    border-radius: 0.375rem;
    color: #6b7280;
    font-size: 0.85rem;
    line-height: 1.5;
}
.u4a-disclosure i {
    color: var(--u4a-green);
}

/* single category embedded on another page */
.u4a-compact {
    margin-bottom: 1rem;
}

@media (max-width: 600px) {
    .u4a-tabs {
        gap: 0.4rem;
    }
    .u4a-tab {
        flex: 1 1 auto;
        padding: 0.55rem 0.75rem;
        text-align: center;
        font-size: 0.85rem;
    }
    .u4a-chips {
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.25rem;
        -webkit-overflow-scrolling: touch;
    }
    .u4a-chip {
        flex: 0 0 auto;
    }
    .u4a-button-more {
        display: none;
    }
    .u4a-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
    }
    .u4a-card-body {
        padding: 0.75rem;
    }
    .u4a-card-title {
        font-size: 0.95rem;
    }
    .u4a-card-text {
        display: none;      /* short cards on phones; the text is a nice-to-have */
    }
    .u4a-button {
        padding: 0.55rem 0.5rem;
        font-size: 0.75rem;
    }
    .u4a-card:hover {
        transform: none;
    }
}