.page-hero {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 2px 2px, rgba(255, 255, 255, .06) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
}

.page-hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    right: -100px;
    bottom: -100px;
    background: rgba(0, 196, 167, .08);
    border-radius: 50%;
    pointer-events: none;
}

.page-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-hero-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.page-hero-title em {
    font-style: normal;
    color: var(--teal);
}

.page-hero-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, .75);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: .875rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, .6);
}

.breadcrumb a:hover {
    color: var(--teal);
}

.breadcrumb span {
    color: var(--teal);
}

.breadcrumb i {
    color: rgba(255, 255, 255, .4);
    font-size: 12px;
}

/* ─── CATALOG SECTION ───────────────────────────────────── */
.catalog-section {
    padding: 80px 0 100px;
    background: var(--off-white);
}

/* ─── FILTERS ───────────────────────────────────────────── */
.catalog-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.catalog-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--white);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: .9375rem;
    font-weight: 600;
    color: var(--muted);
    cursor: pointer;
    transition: all var(--t) var(--ease);
}

.catalog-filter-btn i {
    font-size: 18px;
}

.catalog-filter-btn:hover {
    border-color: var(--teal);
    color: var(--teal);
}

.catalog-filter-btn.active {
    background: var(--teal);
    border-color: var(--teal);
    color: var(--white);
}

/* ─── CATALOG GRID ──────────────────────────────────────── */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    align-items: stretch;
}

/* ─── CATALOG CARD ──────────────────────────────────────── */
.catalog-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    transition: all .3s var(--ease);
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.catalog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 196, 167, .3);
}

.catalog-card.hidden {
    display: none;
}

/* Card Image */
.catalog-card-img {
    position: relative;
    aspect-ratio: 16 / 11;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.catalog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s var(--ease);
}

.catalog-card:hover .catalog-card-img img {
    transform: scale(1.05);
}

/* Card Badge */
.catalog-card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--teal);
    border-radius: 50px;
    font-size: .75rem;
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: .5px;
}

.catalog-card-badge i {
    font-size: 14px;
}

.catalog-card-badge.beseri {
    background: #6366f1;
}

.catalog-card-badge.ekipman {
    background: #f59e0b;
}

/* Card Body */
.catalog-card-body {
    padding: 22px 22px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.catalog-card-top {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.catalog-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--navy);
    margin: 0;
    line-height: 1.45;
    min-height: calc(1.45em * 2);
}

.catalog-card-desc {
    font-size: .9rem;
    color: var(--muted);
    line-height: 1.65;
    margin: 0;
    min-height: calc(1.65em * 3);
}

/* Card Actions */
.catalog-card-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.catalog-card-actions .btn {
    flex: 1;
    justify-content: center;
    min-height: 44px;
}

.catalog-pdf-btn {
    flex: 0 0 108px !important;
}

.btn-sm {
    padding: 10px 16px;
    font-size: .875rem;
}

/* ─── EMPTY STATE ───────────────────────────────────────── */
.catalog-empty {
    text-align: center;
    padding: 80px 20px;
    background: var(--white);
    border-radius: 20px;
    border: 2px dashed var(--border);
}

.catalog-empty i {
    font-size: 64px;
    color: var(--border);
    margin-bottom: 20px;
}

.catalog-empty h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 8px;
}

.catalog-empty p {
    font-size: .95rem;
    color: var(--muted);
}

/* ─── RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 1280px) {
    .catalog-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 20px;
    }

    .catalog-card-body {
        padding: 20px;
    }

    .catalog-card-title {
        font-size: 1rem;
    }
}

@media (max-width: 1100px) {
    .catalog-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .catalog-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 22px;
    }
}

@media (max-width: 768px) {
    .page-hero {
        padding: 140px 0 70px;
    }

    .page-hero-title {
        font-size: clamp(1.375rem, 4.5vw, 1.75rem);
    }

    .page-hero-desc {
        font-size: 1rem;
    }

    .catalog-section {
        padding: 60px 0 80px;
    }

    .catalog-filters {
        gap: 8px;
        margin-bottom: 32px;
    }

    .catalog-filter-btn {
        padding: 10px 18px;
        font-size: .875rem;
    }

    .catalog-card-img {
        aspect-ratio: 16 / 10;
    }

    .catalog-card-body {
        padding: 18px;
    }

    .catalog-card-title {
        min-height: auto;
    }

    .catalog-card-desc {
        min-height: auto;
    }
}

@media (max-width: 640px) {
    .catalog-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .catalog-card-actions {
        flex-direction: row;
    }
}

@media (max-width: 480px) {
    .catalog-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .catalog-filter-btn {
        justify-content: center;
    }

    .catalog-card-actions {
        flex-direction: column;
    }

    .catalog-pdf-btn {
        flex: 1 1 auto !important;
    }

    .catalog-card-actions .btn {
        width: 100%;
    }
}