.letter-separator {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin: 15px 0 10px;
    gap: 2px;
}
.letter-separator .letter-label {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-primary, #037dd3);
    display: block;
}
.letter-separator .separator-line {
    width: 100%;
    height: 1px;
    background: var(--border-primary, #e0e0e0);
    display: block;
}
.alphabet-filter .nav-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-primary, #e0e0e0);
    background: var(--bg-primary, #ffffff);
    color: var(--color-text-dark, #333);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    user-select: none;
    transition: all 0.3s ease;
    margin: 0 4px;
}
.alphabet-filter .nav-arrow:hover {
    background: var(--color-primary, #037dd3);
    color: var(--color-onaccent, #ffffff);
    border-color: var(--color-primary, #037dd3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(3, 125, 211, 0.2);
}
.marchi-page-wrapper {
    width: 100%;
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 10px;
    margin-top: 30px;
}
.marchi-header {
    text-align: center;
    margin-bottom: 30px;
}
.marchi-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary, #037dd3);
    margin-bottom: 10px;
    text-transform: uppercase;
}
.marchi-header p {
    font-size: 15px;
    color: var(--color-neutral, #666);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}
.alphabet-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    margin-bottom: 30px;
    padding: 8px 5px;
    background: linear-gradient(to bottom, rgba(3, 125, 211, 0.03), transparent);
    border-radius: 12px;
    position: sticky;
    top: 140px;
    z-index: 2;
}
.alphabet-filter button {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-primary, #e0e0e0);
    background: var(--bg-primary, #ffffff);
    color: var(--color-text-dark, #333);
    font-size: 15px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.alphabet-filter button:hover {
    background: var(--color-primary, #037dd3);
    color: var(--color-onaccent, #ffffff);
    border-color: var(--color-primary, #037dd3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(3, 125, 211, 0.2);
}
.alphabet-filter button.active {
    background: var(--color-primary, #037dd3);
    color: var(--color-onaccent, #ffffff);
    border-color: var(--color-primary, #037dd3);
    box-shadow: 0 4px 12px rgba(3, 125, 211, 0.3);
}
.alphabet-filter button.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}
.alphabet-filter .reset-btn {
    width: auto;
    padding: 0 16px;
    background: var(--bg-gray, #f5f5f5);
    border-color: var(--border-primary, #e0e0e0);
    color: var(--color-text-dark, #333);
}
.alphabet-filter .reset-btn:hover {
    background: var(--color-primary, #037dd3);
    color: var(--color-onaccent, #ffffff);
    border-color: var(--color-primary, #037dd3);
}
.marchi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 40px;
}
.marchio-card {
    background: var(--bg-primary, #ffffff);
    border: 1px solid var(--border-primary, #e0e0e0);
    border-radius: 12px;
    padding: 18px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}
.marchio-card::before {
    content: none !important;
}
.marchio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary, #037dd3);
}
.marchio-card:hover::before {
    display: none !important;
}
.marchio-card a {
    display: block;
    text-decoration: none;
}
.marchio-card img {
    width: 100%;
    max-width: 140px;
    height: auto;
    aspect-ratio: 2 / 1;
    object-fit: contain;
    border-radius: 8px;
    transition: filter 0.3s ease;
}
.marchio-card:hover img {
    filter: brightness(1.05);
}
.marchio-card .marchio-name {
    display: block;
    margin-top: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-dark, #333);
    line-height: 1.3;
}
.marchio-card.sorting {
    animation: sortPulse 0.5s ease;
}

@keyframes sortPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(0.95); }
}
@media (min-width: 480px) {
    .marchi-page-wrapper {
        padding: 0 15px;
        margin-top: 25px;
    }
    .marchi-header {
        margin-bottom: 35px;
    }
    .marchi-header h1 {
        font-size: 32px;
    }
    .marchi-header p {
        font-size: 16px;
    }
    .alphabet-filter {
        margin-bottom: 35px;
        padding: 10px 8px;
    }
    .marchi-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }
    .marchio-card {
        padding: 20px;
    }
    .marchio-card img {
        max-width: 150px;
    }
    .marchio-card .marchio-name {
        font-size: 14px;
        margin-top: 12px;
    }
    .letter-separator {
        margin: 18px 0 12px;
    }
    .letter-separator .letter-label {
        font-size: 26px;
    }
}

@media (min-width: 768px) {
    .marchi-page-wrapper {
        padding: 0 20px;
        margin-top: 20px;
    }
    .marchi-header {
        margin-bottom: 40px;
    }
    .marchi-header h1 {
        font-size: 36px;
    }
    .alphabet-filter {
        top: 90px;
        margin-bottom: 40px;
    }
    .alphabet-filter button {
        width: 42px;
        height: 42px;
        font-size: 16px;
    }
    .marchi-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 22px;
    }
    .marchio-card {
        padding: 22px;
    }
    .marchio-card img {
        max-width: 160px;
    }
    .marchio-card .marchio-name {
        font-size: 14px;
    }
    .letter-separator {
        margin: 20px 0 15px;
    }
    .letter-separator .letter-label {
        font-size: 28px;
    }
}
@media (min-width: 1024px) {
    .marchi-page-wrapper {
        padding: 0 40px;
        margin-top: 25px;
    }
    .marchi-header h1 {
        font-size: 42px;
    }
    .alphabet-filter {
        top: 120px;
    }
    .alphabet-filter button {
        width: 45px;
        height: 45px;
        font-size: 17px;
    }
    .alphabet-filter .reset-btn {
        padding: 0 20px;
    }
    .marchi-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 26px;
    }
    .marchio-card {
        padding: 25px;
    }
    .marchio-card img {
        max-width: 180px;
    }
    .marchio-card .marchio-name {
        font-size: 15px;
    }
    .letter-separator {
        margin: 25px 0 18px;
    }
    .letter-separator .letter-label {
        font-size: 32px;
    }
}
@media (min-width: 1400px) {
    .marchi-grid {
        grid-template-columns: repeat(6, 1fr);
        gap: 30px;
    }
    .marchio-card {
        padding: 28px;
    }
}