/* ── Page-specific: Referenzen ─────────────────────────── */
.page-hero {
    padding: 9rem 0 3.5rem;
    background: linear-gradient(168deg, var(--dgs-white) 0%, var(--dgs-neutral-50) 60%, var(--dgs-primary-lighter) 100%);
}
.page-hero .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.page-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.75rem);
    color: var(--dgs-gray-800);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}
.page-hero p {
    font-size: 1.0625rem;
    color: var(--dgs-gray-600);
    max-width: 600px;
    line-height: 1.7;
}

/* Filter tabs */
.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}
.filter-tab {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.25rem;
    border-radius: 99px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1.5px solid var(--dgs-gray-200);
    color: var(--dgs-gray-600);
    background: var(--dgs-white);
    transition: all 0.2s;
}
.filter-tab:hover {
    border-color: var(--dgs-primary);
    color: var(--dgs-primary);
}
.filter-tab.active {
    background: var(--dgs-primary);
    color: var(--dgs-white);
    border-color: var(--dgs-primary);
}
.filter-count {
    font-size: 0.75rem;
    background: rgba(255,255,255,0.2);
    padding: 0.0625rem 0.5rem;
    border-radius: 99px;
    margin-left: 0.5rem;
}
.filter-tab:not(.active) .filter-count {
    background: var(--dgs-gray-100);
    color: var(--dgs-gray-500);
}

/* Full-width project grid */
.ref-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* Project detail line */
.project-card-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    font-size: 0.8125rem;
    color: var(--dgs-gray-500);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--dgs-gray-100);
}
.project-card-detail dt {
    font-weight: 600;
    color: var(--dgs-gray-600);
}
.project-card-detail dd { margin: 0; }

.detail-pair {
    display: flex;
    gap: 0.375rem;
}

/* Empty state */
.empty-ref {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    color: var(--dgs-gray-400);
}
.empty-ref p { margin-bottom: 0.5rem; }

@media (max-width: 1024px) {
    .ref-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .ref-grid { grid-template-columns: 1fr; }
    .page-hero { padding: 7.5rem 0 2.5rem; }
}

.ref-empty-hint { font-size: 0.875rem; }
.ref-empty-hint-link { color: var(--dgs-primary); }