/* ===================================================
   Backauf Referenzen - Public Styles
   =================================================== */

/* ── CSS Variables (overridden by inline <style> from PHP) ── */
:root {
    --backauf-primary: #0556a5;
    --backauf-bg: #f4f7fa;
    --backauf-card-bg: #ffffff;
    --backauf-card-radius: 8px;
    --backauf-card-border: #e5e7eb;
    --backauf-gap: 24px;
    --backauf-title-color: #1a202c;
    --backauf-title-size: 18px;
    --backauf-text-color: #4a5568;
    --backauf-text-size: 14px;
    --backauf-link-color: #0556a5;
    --backauf-badge-bg: #0556a5;
    --backauf-badge-color: #ffffff;
    --backauf-badge-radius: 4px;
    --backauf-btn-bg: #0556a5;
    --backauf-btn-color: #ffffff;
    --backauf-filter-active-bg: #0556a5;
    --backauf-filter-active-color: #ffffff;
    --backauf-image-height: 200px;
    --backauf-image-placeholder: #f4f7fa;
}

/* ── Wrapper ── */
.backauf-referenzen-wrapper {
    width: 100%;
}

/* ── Filter Bar ── */
.backauf-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
    align-items: center;
}

.backauf-filter-btn {
    background: transparent;
    border: 2px solid var(--backauf-card-border);
    color: var(--backauf-text-color);
    padding: 7px 18px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

/* Filter: pills */
.backauf-filter-pills .backauf-filter-btn { border-radius: 50px; }

/* Filter: tabs */
.backauf-filter-tabs .backauf-filter-btn {
    border-radius: 4px 4px 0 0;
    border-bottom: none;
}

/* Filter: buttons */
.backauf-filter-buttons .backauf-filter-btn { border-radius: 6px; }

.backauf-filter-btn:hover,
.backauf-filter-btn.active {
    background: var(--backauf-filter-active-bg);
    color: var(--backauf-filter-active-color);
    border-color: var(--backauf-filter-active-bg);
}

/* Filter: dropdown */
.backauf-filter-dropdown .backauf-filter-btn { display: none; }
.backauf-filter-dropdown-select {
    padding: 8px 12px;
    border: 2px solid var(--backauf-card-border);
    border-radius: 6px;
    font-size: 14px;
    background: white;
    min-width: 200px;
}

/* ── Grid ── */
.backauf-ref-grid {
    display: grid;
    grid-template-columns: repeat(var(--backauf-cols, 3), 1fr);
    gap: var(--backauf-gap);
}

.backauf-layout-grid .backauf-ref-grid { --backauf-cols: 3; }
.backauf-cols-1 .backauf-ref-grid { --backauf-cols: 1; }
.backauf-cols-2 .backauf-ref-grid { --backauf-cols: 2; }
.backauf-cols-3 .backauf-ref-grid { --backauf-cols: 3; }
.backauf-cols-4 .backauf-ref-grid { --backauf-cols: 4; }
.backauf-cols-5 .backauf-ref-grid { --backauf-cols: 5; }
.backauf-cols-6 .backauf-ref-grid { --backauf-cols: 6; }

/* ── List Layout ── */
.backauf-ref-list {
    display: flex;
    flex-direction: column;
    gap: var(--backauf-gap);
}

.backauf-ref-list .backauf-ref-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    border-radius: var(--backauf-card-radius);
    overflow: hidden;
}

.backauf-ref-list .backauf-ref-image {
    height: 100% !important;
    min-height: 180px;
}

/* ── Masonry ── */
.backauf-ref-masonry {
    column-count: 3;
    column-gap: var(--backauf-gap);
}

.backauf-cols-2 .backauf-ref-masonry { column-count: 2; }
.backauf-cols-4 .backauf-ref-masonry { column-count: 4; }

.backauf-ref-masonry .backauf-ref-card {
    break-inside: avoid;
    margin-bottom: var(--backauf-gap);
}

/* ── Logo Layout ── */
.backauf-layout-logo .backauf-ref-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    min-height: 100px;
}

.backauf-layout-logo .backauf-ref-image {
    height: 80px !important;
    background: transparent !important;
}

.backauf-layout-logo .backauf-ref-image img {
    width: 100%;
    height: 80px;
    object-fit: contain;
}

.backauf-layout-logo .backauf-ref-content { display: none; }

/* ── Card ── */
.backauf-ref-card {
    background: var(--backauf-card-bg);
    border-radius: var(--backauf-card-radius);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Card styles */
.backauf-ref-card[data-card-style="shadow"] {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.04);
}

.backauf-ref-card[data-card-style="border"] {
    border: 2px solid var(--backauf-card-border);
}

.backauf-ref-card[data-card-style="flat"] {
    background: var(--backauf-bg);
}

.backauf-ref-card[data-card-style="elevated"] {
    box-shadow: 0 8px 24px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
}

/* Hover effects */
.backauf-hover-lift .backauf-ref-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(5,86,165,0.15), 0 4px 12px rgba(0,0,0,0.08);
}

.backauf-hover-glow .backauf-ref-card:hover {
    box-shadow: 0 0 0 3px var(--backauf-primary), 0 8px 24px rgba(5,86,165,0.2);
}

.backauf-hover-zoom .backauf-ref-card:hover .backauf-ref-img {
    transform: scale(1.06);
}

.backauf-hover-border .backauf-ref-card:hover {
    border: 2px solid var(--backauf-primary);
}

/* Featured card */
.backauf-ref-card.backauf-ref-featured {
    border: 2px solid var(--backauf-primary);
}

/* ── Image ── */
.backauf-ref-image {
    position: relative;
    height: var(--backauf-image-height);
    overflow: hidden;
    background: var(--backauf-image-placeholder);
}

.backauf-ref-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.backauf-ref-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--backauf-image-placeholder);
}

.backauf-ref-initials {
    font-size: 32px;
    font-weight: 800;
    color: var(--backauf-primary);
    opacity: 0.4;
    letter-spacing: 2px;
}

/* ── Badge ── */
.backauf-ref-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--backauf-badge-bg);
    color: var(--backauf-badge-color);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--backauf-badge-radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.backauf-ref-featured-star {
    position: absolute;
    top: 12px;
    right: 12px;
    color: #f59e0b;
    font-size: 18px;
    z-index: 2;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

/* ── Content ── */
.backauf-ref-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.backauf-ref-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
    align-self: flex-start;
    margin-top: auto;
    color: var(--backauf-link-color);
    border: 2px solid var(--backauf-link-color);
}


.backauf-ref-kunde {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--backauf-primary);
    margin: 0;
}

.backauf-ref-title {
    font-size: var(--backauf-title-size);
    font-weight: 700;
    color: var(--backauf-title-color);
    margin: 0;
    line-height: 1.3;
}

.backauf-ref-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

.backauf-ref-title a:hover { color: var(--backauf-link-color); }

.backauf-ref-excerpt {
    font-size: var(--backauf-text-size);
    color: var(--backauf-text-color);
    margin: 0;
    line-height: 1.5;
}

.backauf-ref-leistung {
    font-size: calc(var(--backauf-text-size) - 1px);
    color: var(--backauf-text-color);
    margin: 0;
}

.backauf-ref-zeitraum {
    display: inline-block;
    font-size: 12px;
    color: var(--backauf-text-color);
    opacity: 0.6;
    border: 1px solid currentColor;
    padding: 2px 8px;
    border-radius: 4px;
    align-self: flex-start;
    margin-top: 4px;
}

/* ── Button ── */

.backauf-ref-btn.backauf-btn-outlined {
    background: transparent;
    color: var(--backauf-primary);
    border-color: var(--backauf-primary);
}

.backauf-ref-btn.backauf-btn-outlined:hover {
    background: var(--backauf-primary);
    color: white;
}

.backauf-ref-btn.backauf-btn-filled {
    border: none;
}

.backauf-ref-btn.backauf-btn-filled:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.backauf-ref-btn.backauf-btn-text {
    border: none;
    padding-left: 0;
    padding-right: 0;
    background: transparent;
    color: var(--backauf-link-color);
}

.backauf-ref-btn.backauf-btn-text:hover { text-decoration: underline; }

/* ── Animations ── */
@keyframes backauf-fade-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes backauf-slide-in { from { opacity: 0; transform: translateX(-20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes backauf-zoom-in { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }

.backauf-anim-fade .backauf-ref-card { animation: backauf-fade-in 0.5s ease both; }
.backauf-anim-slide .backauf-ref-card { animation: backauf-slide-in 0.4s ease both; }
.backauf-anim-zoom .backauf-ref-card { animation: backauf-zoom-in 0.4s ease both; }

.backauf-ref-card:nth-child(2) { animation-delay: 0.05s; }
.backauf-ref-card:nth-child(3) { animation-delay: 0.10s; }
.backauf-ref-card:nth-child(4) { animation-delay: 0.15s; }
.backauf-ref-card:nth-child(5) { animation-delay: 0.20s; }
.backauf-ref-card:nth-child(6) { animation-delay: 0.25s; }
.backauf-ref-card:nth-child(7) { animation-delay: 0.30s; }
.backauf-ref-card:nth-child(8) { animation-delay: 0.35s; }

/* Filter visibility */
.backauf-ref-card.backauf-hidden {
    display: none;
}

/* No results */
.backauf-no-results {
    grid-column: 1/-1;
    text-align: center;
    padding: 48px;
    color: #94a3b8;
    font-size: 16px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .backauf-cols-4 .backauf-ref-grid,
    .backauf-cols-5 .backauf-ref-grid,
    .backauf-cols-6 .backauf-ref-grid { --backauf-cols: 3; }
    .backauf-ref-masonry { column-count: 2; }
}

@media (max-width: 768px) {
    .backauf-cols-3 .backauf-ref-grid,
    .backauf-cols-4 .backauf-ref-grid,
    .backauf-cols-5 .backauf-ref-grid,
    .backauf-cols-6 .backauf-ref-grid { --backauf-cols: 2; }
    .backauf-ref-list .backauf-ref-card { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .backauf-ref-grid { --backauf-cols: 1 !important; }
    .backauf-ref-masonry { column-count: 1; }
}

/* ── Image fit variants ── */
.backauf-img-fit-cover   { object-fit: cover; }
.backauf-img-fit-contain { object-fit: contain; }
.backauf-img-fit-fill    { object-fit: fill; }