.btn-year-filter {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 50px;
    border: 1.5px solid rgba(255, 184, 0, 0.3);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(8px);
    color: #333;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-year-filter:hover {
    background: rgba(255, 184, 0, 0.12);
    border-color: var(--primary-color, #FFB800);
    transform: translateY(-1px);
}

.btn-year-filter.active {
    background: var(--primary-color, #FFB800);
    border-color: var(--primary-color, #FFB800);
    color: #fff;
    box-shadow: 0 4px 15px rgba(255, 184, 0, 0.35);
}

.year-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 4px;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    background: rgba(0, 0, 0, 0.12);
}

.btn-year-filter.active .year-count {
    background: rgba(255, 255, 255, 0.25);
}

.year-block {
    transition: opacity 0.25s ease;
}