/* --- CẤU TRÚC CHUNG --- */
.archive-filter-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    /* transition cho cả border-color */
    transition: background-color 0.4s ease, color 0.4s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.4s ease;
    cursor: pointer;
    border: none;
    outline: none;
    z-index: 1;
    margin-bottom: -2px;
}

/* --- TRẠNG THÁI CHƯA ACTIVE --- */
.archive-filter-btn:not(.bg-neutral-800) {
    background-color: transparent;
    color: #737373;
    border-bottom-color: #C7CCC3; /* Màu border mặc định */
}

/* Hover nhẹ cho nút chưa active */
.archive-filter-btn:not(.bg-neutral-800):hover {
    color: #171717;
    background-color: rgba(0, 0, 0, 0.05);
}

/* --- TRẠNG THÁI ĐANG ACTIVE --- */
.archive-filter-btn.bg-neutral-800 {
    background-color: #262626 !important; /* Neutral 800 */
    color: #ffffff !important;
    transform: scale(1.05); 
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    z-index: 10;
    border-bottom: 2px solid #262626 !important;
}

/* Khóa hover khi đã active */
.archive-filter-btn.bg-neutral-800:hover {
    background-color: #262626 !important;
    color: #ffffff !important;
    transform: scale(1.05);
}