/* ============================================
   TecDoc Catalog Styles
   ============================================ */

.catalog-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

/* Header */
.catalog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}
.catalog-header h4 {
    margin: 0;
    font-weight: 600;
}
.catalog-header h4 small {
    font-size: 14px;
    font-weight: 400;
}

/* Search Box */
.search-box {
    position: relative;
    width: 280px;
}
.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}
.search-box .filter-input {
    width: 100%;
    padding: 10px 15px 10px 38px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}
.search-box .filter-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(51,102,255,0.1);
    outline: none;
}

/* Tabs */
.catalog-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}
.catalog-tabs .tab-item {
    flex: 1;
    text-align: center;
    padding: 15px 20px;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}
.catalog-tabs .tab-item:hover {
    color: var(--primary);
    background: var(--bg-light);
}
.catalog-tabs .tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Alphabet Navigation */
.alphabet-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-light);
}
.alphabet-nav .letter-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13px;
    text-decoration: none;
    color: var(--text-dark);
    background: #fff;
    border: 1px solid var(--border-color);
    transition: all 0.15s;
    cursor: pointer;
}
.alphabet-nav .letter-item:hover:not(.disabled) {
    border-color: var(--primary);
    color: var(--primary);
}
.alphabet-nav .letter-item.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.alphabet-nav .letter-item.disabled {
    opacity: 0.35;
    cursor: default;
    pointer-events: none;
}

/* Brands List */
.brands-list {
    padding: 0;
}

.letter-group {
    border-bottom: 1px solid var(--border-color);
}
.letter-group:last-child {
    border-bottom: none;
}

/* Letter Header - ЦЕНТРИРОВАНИЕ */
.letter-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 15px 20px;
    background: var(--bg-light);
}
.letter-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 18px;
}
.letter-count {
    color: var(--text-muted);
    font-size: 14px;
}

/* Brands Grid */
.brands-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 15px 20px;
}

.brand-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    border-radius: 8px;
    background: var(--bg-light);
    text-decoration: none;
    color: var(--text-dark);
    transition: all 0.15s ease;
    border: 1px solid transparent;
}
.brand-item:hover {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 2px 8px rgba(51,102,255,0.12);
}

.brand-name {
    font-size: 13px;
    font-weight: 600;
    text-align: center;
}

/* No Results */
.no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.no-results i {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.4;
}
.no-results p {
    margin: 0;
    font-size: 16px;
}

/* Brand Page Header */
.brand-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}
.brand-header .back-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: #fff;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.15s;
}
.brand-header .back-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.brand-header .brand-logo {
    height: 40px;
    width: auto;
}
.brand-header h4 {
    margin: 0;
    font-weight: 600;
}
.brand-header .models-badge {
    margin-left: auto;
    font-size: 14px;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1199px) {
    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 991px) {
    .catalog-header {
        flex-direction: column;
        gap: 15px;
    }
    .search-box {
        width: 100%;
    }
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .sidebar {
        margin-bottom: 30px;
    }
    .catalog-tabs .tab-item {
        padding: 12px 8px;
        font-size: 12px;
    }
    .catalog-tabs .tab-item i {
        display: none;
    }
    .alphabet-nav {
        padding: 10px 15px;
        gap: 4px;
    }
    .alphabet-nav .letter-item {
        min-width: 28px;
        height: 28px;
        font-size: 12px;
    }
}

@media (max-width: 575px) {
    .brands-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        padding: 12px 15px;
    }
    .letter-header {
        padding: 12px 15px;
    }
}